/********************************************************************************************** * * raylib.models - Basic functions to deal with 3d shapes and 3d models * * CONFIGURATION: * * #define SUPPORT_FILEFORMAT_OBJ * Selected desired fileformats to be supported for loading. * * #define SUPPORT_FILEFORMAT_MTL * Selected desired fileformats to be supported for loading. * * * LICENSE: zlib/libpng * * Copyright (c) 2014-2017 Ramon Santamaria (@raysan5) * * This software is provided "as-is", without any express or implied warranty. In no event * will the authors be held liable for any damages arising from the use of this software. * * Permission is granted to anyone to use this software for any purpose, including commercial * applications, and to alter it and redistribute it freely, subject to the following restrictions: * * 1. The origin of this software must not be misrepresented; you must not claim that you * wrote the original software. If you use this software in a product, an acknowledgment * in the product documentation would be appreciated but is not required. * * 2. Altered source versions must be plainly marked as such, and must not be misrepresented * as being the original software. * * 3. This notice may not be removed or altered from any source distribution. * **********************************************************************************************/ // Default configuration flags (supported features) //------------------------------------------------- #define SUPPORT_FILEFORMAT_OBJ #define SUPPORT_FILEFORMAT_MTL //------------------------------------------------- #include "raylib.h" #if defined(PLATFORM_ANDROID) #include "utils.h" // Android fopen function map #endif #include // Required for: FILE, fopen(), fclose(), fscanf(), feof(), rewind(), fgets() #include // Required for: malloc(), free() #include // Required for: strcmp() #include // Required for: sin(), cos() #include "rlgl.h" // raylib OpenGL abstraction layer to OpenGL 1.1, 2.1, 3.3+ or ES2 //---------------------------------------------------------------------------------- // Defines and Macros //---------------------------------------------------------------------------------- // ... //---------------------------------------------------------------------------------- // Types and Structures Definition //---------------------------------------------------------------------------------- // ... //---------------------------------------------------------------------------------- // Global Variables Definition //---------------------------------------------------------------------------------- // ... //---------------------------------------------------------------------------------- // Module specific Functions Declaration //---------------------------------------------------------------------------------- #if defined(SUPPORT_FILEFORMAT_OBJ) static Mesh LoadOBJ(const char *fileName); // Load OBJ mesh data #endif #if defined(SUPPORT_FILEFORMAT_MTL) static Material LoadMTL(const char *fileName); // Load MTL material data #endif static Mesh GenMeshHeightmap(Image image, Vector3 size); static Mesh GenMeshCubicmap(Image cubicmap, Vector3 cubeSize); //---------------------------------------------------------------------------------- // Module Functions Definition //---------------------------------------------------------------------------------- // Draw a line in 3D world space void DrawLine3D(Vector3 startPos, Vector3 endPos, Color color) { rlBegin(RL_LINES); rlColor4ub(color.r, color.g, color.b, color.a); rlVertex3f(startPos.x, startPos.y, startPos.z); rlVertex3f(endPos.x, endPos.y, endPos.z); rlEnd(); } // Draw a circle in 3D world space void DrawCircle3D(Vector3 center, float radius, Vector3 rotationAxis, float rotationAngle, Color color) { rlPushMatrix(); rlTranslatef(center.x, center.y, center.z); rlRotatef(rotationAngle, rotationAxis.x, rotationAxis.y, rotationAxis.z); rlBegin(RL_LINES); for (int i = 0; i < 360; i += 10) { rlColor4ub(color.r, color.g, color.b, color.a); rlVertex3f(sinf(DEG2RAD*i)*radius, cosf(DEG2RAD*i)*radius, 0.0f); rlVertex3f(sinf(DEG2RAD*(i + 10))*radius, cosf(DEG2RAD*(i + 10))*radius, 0.0f); } rlEnd(); rlPopMatrix(); } // Draw cube // NOTE: Cube position is the center position void DrawCube(Vector3 position, float width, float height, float length, Color color) { float x = 0.0f; float y = 0.0f; float z = 0.0f; rlPushMatrix(); // NOTE: Be careful! Function order matters (rotate -> scale -> translate) rlTranslatef(position.x, position.y, position.z); //rlScalef(2.0f, 2.0f, 2.0f); //rlRotatef(45, 0, 1, 0); rlBegin(RL_TRIANGLES); rlColor4ub(color.r, color.g, color.b, color.a); // Front Face ----------------------------------------------------- rlVertex3f(x-width/2, y-height/2, z+length/2); // Bottom Left rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Right rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Right rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Right // Back Face ------------------------------------------------------ rlVertex3f(x-width/2, y-height/2, z-length/2); // Bottom Left rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Right rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Right rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left // Top Face ------------------------------------------------------- rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left rlVertex3f(x-width/2, y+height/2, z+length/2); // Bottom Left rlVertex3f(x+width/2, y+height/2, z+length/2); // Bottom Right rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left rlVertex3f(x+width/2, y+height/2, z+length/2); // Bottom Right // Bottom Face ---------------------------------------------------- rlVertex3f(x-width/2, y-height/2, z-length/2); // Top Left rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Right rlVertex3f(x-width/2, y-height/2, z+length/2); // Bottom Left rlVertex3f(x+width/2, y-height/2, z-length/2); // Top Right rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Right rlVertex3f(x-width/2, y-height/2, z-length/2); // Top Left // Right face ----------------------------------------------------- rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Right rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Left rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Left rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Right rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Left // Left Face ------------------------------------------------------ rlVertex3f(x-width/2, y-height/2, z-length/2); // Bottom Right rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Right rlVertex3f(x-width/2, y-height/2, z+length/2); // Bottom Left rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left rlVertex3f(x-width/2, y-height/2, z-length/2); // Bottom Right rlEnd(); rlPopMatrix(); } // Draw cube (Vector version) void DrawCubeV(Vector3 position, Vector3 size, Color color) { DrawCube(position, size.x, size.y, size.z, color); } // Draw cube wires void DrawCubeWires(Vector3 position, float width, float height, float length, Color color) { float x = 0.0f; float y = 0.0f; float z = 0.0f; rlPushMatrix(); rlTranslatef(position.x, position.y, position.z); //rlRotatef(45, 0, 1, 0); rlBegin(RL_LINES); rlColor4ub(color.r, color.g, color.b, color.a); // Front Face ----------------------------------------------------- // Bottom Line rlVertex3f(x-width/2, y-height/2, z+length/2); // Bottom Left rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Right // Left Line rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Right rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Right // Top Line rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Right rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left // Right Line rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left rlVertex3f(x-width/2, y-height/2, z+length/2); // Bottom Left // Back Face ------------------------------------------------------ // Bottom Line rlVertex3f(x-width/2, y-height/2, z-length/2); // Bottom Left rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Right // Left Line rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Right rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right // Top Line rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left // Right Line rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left rlVertex3f(x-width/2, y-height/2, z-length/2); // Bottom Left // Top Face ------------------------------------------------------- // Left Line rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left Front rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left Back // Right Line rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Right Front rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right Back // Bottom Face --------------------------------------------------- // Left Line rlVertex3f(x-width/2, y-height/2, z+length/2); // Top Left Front rlVertex3f(x-width/2, y-height/2, z-length/2); // Top Left Back // Right Line rlVertex3f(x+width/2, y-height/2, z+length/2); // Top Right Front rlVertex3f(x+width/2, y-height/2, z-length/2); // Top Right Back rlEnd(); rlPopMatrix(); } // Draw cube // NOTE: Cube position is the center position void DrawCubeTexture(Texture2D texture, Vector3 position, float width, float height, float length, Color color) { float x = position.x; float y = position.y; float z = position.z; rlEnableTexture(texture.id); //rlPushMatrix(); // NOTE: Be careful! Function order matters (scale, translate, rotate) //rlScalef(2.0f, 2.0f, 2.0f); //rlTranslatef(2.0f, 0.0f, 0.0f); //rlRotatef(45, 0, 1, 0); rlBegin(RL_QUADS); rlColor4ub(color.r, color.g, color.b, color.a); // Front Face rlNormal3f(0.0f, 0.0f, 1.0f); // Normal Pointing Towards Viewer rlTexCoord2f(0.0f, 0.0f); rlVertex3f(x-width/2, y-height/2, z+length/2); // Bottom Left Of The Texture and Quad rlTexCoord2f(1.0f, 0.0f); rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Right Of The Texture and Quad rlTexCoord2f(1.0f, 1.0f); rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Right Of The Texture and Quad rlTexCoord2f(0.0f, 1.0f); rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left Of The Texture and Quad // Back Face rlNormal3f(0.0f, 0.0f,-1.0f); // Normal Pointing Away From Viewer rlTexCoord2f(1.0f, 0.0f); rlVertex3f(x-width/2, y-height/2, z-length/2); // Bottom Right Of The Texture and Quad rlTexCoord2f(1.0f, 1.0f); rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Right Of The Texture and Quad rlTexCoord2f(0.0f, 1.0f); rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Left Of The Texture and Quad rlTexCoord2f(0.0f, 0.0f); rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Left Of The Texture and Quad // Top Face rlNormal3f(0.0f, 1.0f, 0.0f); // Normal Pointing Up rlTexCoord2f(0.0f, 1.0f); rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left Of The Texture and Quad rlTexCoord2f(0.0f, 0.0f); rlVertex3f(x-width/2, y+height/2, z+length/2); // Bottom Left Of The Texture and Quad rlTexCoord2f(1.0f, 0.0f); rlVertex3f(x+width/2, y+height/2, z+length/2); // Bottom Right Of The Texture and Quad rlTexCoord2f(1.0f, 1.0f); rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right Of The Texture and Quad // Bottom Face rlNormal3f(0.0f,-1.0f, 0.0f); // Normal Pointing Down rlTexCoord2f(1.0f, 1.0f); rlVertex3f(x-width/2, y-height/2, z-length/2); // Top Right Of The Texture and Quad rlTexCoord2f(0.0f, 1.0f); rlVertex3f(x+width/2, y-height/2, z-length/2); // Top Left Of The Texture and Quad rlTexCoord2f(0.0f, 0.0f); rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Left Of The Texture and Quad rlTexCoord2f(1.0f, 0.0f); rlVertex3f(x-width/2, y-height/2, z+length/2); // Bottom Right Of The Texture and Quad // Right face rlNormal3f(1.0f, 0.0f, 0.0f); // Normal Pointing Right rlTexCoord2f(1.0f, 0.0f); rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Right Of The Texture and Quad rlTexCoord2f(1.0f, 1.0f); rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right Of The Texture and Quad rlTexCoord2f(0.0f, 1.0f); rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Left Of The Texture and Quad rlTexCoord2f(0.0f, 0.0f); rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Left Of The Texture and Quad // Left Face rlNormal3f(-1.0f, 0.0f, 0.0f); // Normal Pointing Left rlTexCoord2f(0.0f, 0.0f); rlVertex3f(x-width/2, y-height/2, z-length/2); // Bottom Left Of The Texture and Quad rlTexCoord2f(1.0f, 0.0f); rlVertex3f(x-width/2, y-height/2, z+length/2); // Bottom Right Of The Texture and Quad rlTexCoord2f(1.0f, 1.0f); rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Right Of The Texture and Quad rlTexCoord2f(0.0f, 1.0f); rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left Of The Texture and Quad rlEnd(); //rlPopMatrix(); rlDisableTexture(); } // Draw sphere void DrawSphere(Vector3 centerPos, float radius, Color color) { DrawSphereEx(centerPos, radius, 16, 16, color); } // Draw sphere with extended parameters void DrawSphereEx(Vector3 centerPos, float radius, int rings, int slices, Color color) { rlPushMatrix(); rlTranslatef(centerPos.x, centerPos.y, centerPos.z); rlScalef(radius, radius, radius); rlBegin(RL_TRIANGLES); rlColor4ub(color.r, color.g, color.b, color.a); for (int i = 0; i < (rings + 2); i++) { for (int j = 0; j < slices; j++) { rlVertex3f(cosf(DEG2RAD*(270+(180/(rings + 1))*i))*sinf(DEG2RAD*(j*360/slices)), sinf(DEG2RAD*(270+(180/(rings + 1))*i)), cosf(DEG2RAD*(270+(180/(rings + 1))*i))*cosf(DEG2RAD*(j*360/slices))); rlVertex3f(cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*sinf(DEG2RAD*((j+1)*360/slices)), sinf(DEG2RAD*(270+(180/(rings + 1))*(i+1))), cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*cosf(DEG2RAD*((j+1)*360/slices))); rlVertex3f(cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*sinf(DEG2RAD*(j*360/slices)), sinf(DEG2RAD*(270+(180/(rings + 1))*(i+1))), cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*cosf(DEG2RAD*(j*360/slices))); rlVertex3f(cosf(DEG2RAD*(270+(180/(rings + 1))*i))*sinf(DEG2RAD*(j*360/slices)), sinf(DEG2RAD*(270+(180/(rings + 1))*i)), cosf(DEG2RAD*(270+(180/(rings + 1))*i))*cosf(DEG2RAD*(j*360/slices))); rlVertex3f(cosf(DEG2RAD*(270+(180/(rings + 1))*(i)))*sinf(DEG2RAD*((j+1)*360/slices)), sinf(DEG2RAD*(270+(180/(rings + 1))*(i))), cosf(DEG2RAD*(270+(180/(rings + 1))*(i)))*cosf(DEG2RAD*((j+1)*360/slices))); rlVertex3f(cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*sinf(DEG2RAD*((j+1)*360/slices)), sinf(DEG2RAD*(270+(180/(rings + 1))*(i+1))), cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*cosf(DEG2RAD*((j+1)*360/slices))); } } rlEnd(); rlPopMatrix(); } // Draw sphere wires void DrawSphereWires(Vector3 centerPos, float radius, int rings, int slices, Color color) { rlPushMatrix(); rlTranslatef(centerPos.x, centerPos.y, centerPos.z); rlScalef(radius, radius, radius); rlBegin(RL_LINES); rlColor4ub(color.r, color.g, color.b, color.a); for (int i = 0; i < (rings + 2); i++) { for (int j = 0; j < slices; j++) { rlVertex3f(cosf(DEG2RAD*(270+(180/(rings + 1))*i))*sinf(DEG2RAD*(j*360/slices)), sinf(DEG2RAD*(270+(180/(rings + 1))*i)), cosf(DEG2RAD*(270+(180/(rings + 1))*i))*cosf(DEG2RAD*(j*360/slices))); rlVertex3f(cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*sinf(DEG2RAD*((j+1)*360/slices)), sinf(DEG2RAD*(270+(180/(rings + 1))*(i+1))), cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*cosf(DEG2RAD*((j+1)*360/slices))); rlVertex3f(cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*sinf(DEG2RAD*((j+1)*360/slices)), sinf(DEG2RAD*(270+(180/(rings + 1))*(i+1))), cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*cosf(DEG2RAD*((j+1)*360/slices))); rlVertex3f(cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*sinf(DEG2RAD*(j*360/slices)), sinf(DEG2RAD*(270+(180/(rings + 1))*(i+1))), cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*cosf(DEG2RAD*(j*360/slices))); rlVertex3f(cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*sinf(DEG2RAD*(j*360/slices)), sinf(DEG2RAD*(270+(180/(rings + 1))*(i+1))), cosf(DEG2RAD*(270+(180/(rings + 1))*(i+1)))*cosf(DEG2RAD*(j*360/slices))); rlVertex3f(cosf(DEG2RAD*(270+(180/(rings + 1))*i))*sinf(DEG2RAD*(j*360/slices)), sinf(DEG2RAD*(270+(180/(rings + 1))*i)), cosf(DEG2RAD*(270+(180/(rings + 1))*i))*cosf(DEG2RAD*(j*360/slices))); } } rlEnd(); rlPopMatrix(); } // Draw a cylinder // NOTE: It could be also used for pyramid and cone void DrawCylinder(Vector3 position, float radiusTop, float radiusBottom, float height, int sides, Color color) { if (sides < 3) sides = 3; rlPushMatrix(); rlTranslatef(position.x, position.y, position.z); rlBegin(RL_TRIANGLES); rlColor4ub(color.r, color.g, color.b, color.a); if (radiusTop > 0) { // Draw Body ------------------------------------------------------------------------------------- for (int i = 0; i < 360; i += 360/sides) { rlVertex3f(sinf(DEG2RAD*i)*radiusBottom, 0, cosf(DEG2RAD*i)*radiusBottom); //Bottom Left rlVertex3f(sinf(DEG2RAD*(i+360/sides))*radiusBottom, 0, cosf(DEG2RAD*(i+360/sides))*radiusBottom); //Bottom Right rlVertex3f(sinf(DEG2RAD*(i+360/sides))*radiusTop, height, cosf(DEG2RAD*(i+360/sides))*radiusTop); //Top Right rlVertex3f(sinf(DEG2RAD*i)*radiusTop, height, cosf(DEG2RAD*i)*radiusTop); //Top Left rlVertex3f(sinf(DEG2RAD*i)*radiusBottom, 0, cosf(DEG2RAD*i)*radiusBottom); //Bottom Left rlVertex3f(sinf(DEG2RAD*(i+360/sides))*radiusTop, height, cosf(DEG2RAD*(i+360/sides))*radiusTop); //Top Right } // Draw Cap -------------------------------------------------------------------------------------- for (int i = 0; i < 360; i += 360/sides) { rlVertex3f(0, height, 0); rlVertex3f(sinf(DEG2RAD*i)*radiusTop, height, cosf(DEG2RAD*i)*radiusTop); rlVertex3f(sinf(DEG2RAD*(i+360/sides))*radiusTop, height, cosf(DEG2RAD*(i+360/sides))*radiusTop); } } else { // Draw Cone ------------------------------------------------------------------------------------- for (int i = 0; i < 360; i += 360/sides) { rlVertex3f(0, height, 0); rlVertex3f(sinf(DEG2RAD*i)*radiusBottom, 0, cosf(DEG2RAD*i)*radiusBottom); rlVertex3f(sinf(DEG2RAD*(i+360/sides))*radiusBottom, 0, cosf(DEG2RAD*(i+360/sides))*radiusBottom); } } // Draw Base ----------------------------------------------------------------------------------------- for (int i = 0; i < 360; i += 360/sides) { rlVertex3f(0, 0, 0); rlVertex3f(sinf(DEG2RAD*(i+360/sides))*radiusBottom, 0, cosf(DEG2RAD*(i+360/sides))*radiusBottom); rlVertex3f(sinf(DEG2RAD*i)*radiusBottom, 0, cosf(DEG2RAD*i)*radiusBottom); } rlEnd(); rlPopMatrix(); } // Draw a wired cylinder // NOTE: It could be also used for pyramid and cone void DrawCylinderWires(Vector3 position, float radiusTop, float radiusBottom, float height, int sides, Color color) { if (sides < 3) sides = 3; rlPushMatrix(); rlTranslatef(position.x, position.y, position.z); rlBegin(RL_LINES); rlColor4ub(color.r, color.g, color.b, color.a); for (int i = 0; i < 360; i += 360/sides) { rlVertex3f(sinf(DEG2RAD*i)*radiusBottom, 0, cosf(DEG2RAD*i)*radiusBottom); rlVertex3f(sinf(DEG2RAD*(i+360/sides))*radiusBottom, 0, cosf(DEG2RAD*(i+360/sides))*radiusBottom); rlVertex3f(sinf(DEG2RAD*(i+360/sides))*radiusBottom, 0, cosf(DEG2RAD*(i+360/sides))*radiusBottom); rlVertex3f(sinf(DEG2RAD*(i+360/sides))*radiusTop, height, cosf(DEG2RAD*(i+360/sides))*radiusTop); rlVertex3f(sinf(DEG2RAD*(i+360/sides))*radiusTop, height, cosf(DEG2RAD*(i+360/sides))*radiusTop); rlVertex3f(sinf(DEG2RAD*i)*radiusTop, height, cosf(DEG2RAD*i)*radiusTop); rlVertex3f(sinf(DEG2RAD*i)*radiusTop, height, cosf(DEG2RAD*i)*radiusTop); rlVertex3f(sinf(DEG2RAD*i)*radiusBottom, 0, cosf(DEG2RAD*i)*radiusBottom); } rlEnd(); rlPopMatrix(); } // Draw a plane void DrawPlane(Vector3 centerPos, Vector2 size, Color color) { // NOTE: Plane is always created on XZ ground rlPushMatrix(); rlTranslatef(centerPos.x, centerPos.y, centerPos.z); rlScalef(size.x, 1.0f, size.y); rlBegin(RL_TRIANGLES); rlColor4ub(color.r, color.g, color.b, color.a); rlNormal3f(0.0f, 1.0f, 0.0f); rlVertex3f(0.5f, 0.0f, -0.5f); rlVertex3f(-0.5f, 0.0f, -0.5f); rlVertex3f(-0.5f, 0.0f, 0.5f); rlVertex3f(-0.5f, 0.0f, 0.5f); rlVertex3f(0.5f, 0.0f, 0.5f); rlVertex3f(0.5f, 0.0f, -0.5f); rlEnd(); rlPopMatrix(); } // Draw a ray line void DrawRay(Ray ray, Color color) { float scale = 10000; rlBegin(RL_LINES); rlColor4ub(color.r, color.g, color.b, color.a); rlColor4ub(color.r, color.g, color.b, color.a); rlVertex3f(ray.position.x, ray.position.y, ray.position.z); rlVertex3f(ray.position.x + ray.direction.x*scale, ray.position.y + ray.direction.y*scale, ray.position.z + ray.direction.z*scale); rlEnd(); } // Draw a grid centered at (0, 0, 0) void DrawGrid(int slices, float spacing) { int halfSlices = slices/2; rlBegin(RL_LINES); for (int i = -halfSlices; i <= halfSlices; i++) { if (i == 0) { rlColor3f(0.5f, 0.5f, 0.5f); rlColor3f(0.5f, 0.5f, 0.5f); rlColor3f(0.5f, 0.5f, 0.5f); rlColor3f(0.5f, 0.5f, 0.5f); } else { rlColor3f(0.75f, 0.75f, 0.75f); rlColor3f(0.75f, 0.75f, 0.75f); rlColor3f(0.75f, 0.75f, 0.75f); rlColor3f(0.75f, 0.75f, 0.75f); } rlVertex3f((float)i*spacing, 0.0f, (float)-halfSlices*spacing); rlVertex3f((float)i*spacing, 0.0f, (float)halfSlices*spacing); rlVertex3f((float)-halfSlices*spacing, 0.0f, (float)i*spacing); rlVertex3f((float)halfSlices*spacing, 0.0f, (float)i*spacing); } rlEnd(); } // Draw gizmo void DrawGizmo(Vector3 position) { // NOTE: RGB = XYZ float length = 1.0f; rlPushMatrix(); rlTranslatef(position.x, position.y, position.z); //rlRotatef(rotation, 0, 1, 0); rlScalef(length, length, length); rlBegin(RL_LINES); rlColor3f(1.0f, 0.0f, 0.0f); rlVertex3f(0.0f, 0.0f, 0.0f); rlColor3f(1.0f, 0.0f, 0.0f); rlVertex3f(1.0f, 0.0f, 0.0f); rlColor3f(0.0f, 1.0f, 0.0f); rlVertex3f(0.0f, 0.0f, 0.0f); rlColor3f(0.0f, 1.0f, 0.0f); rlVertex3f(0.0f, 1.0f, 0.0f); rlColor3f(0.0f, 0.0f, 1.0f); rlVertex3f(0.0f, 0.0f, 0.0f); rlColor3f(0.0f, 0.0f, 1.0f); rlVertex3f(0.0f, 0.0f, 1.0f); rlEnd(); rlPopMatrix(); } // Load mesh from file Mesh LoadMesh(const char *fileName) { Mesh mesh = { 0 }; #if defined(SUPPORT_FILEFORMAT_OBJ) if (IsFileExtension(fileName, ".obj")) mesh = LoadOBJ(fileName); #else TraceLog(WARNING, "[%s] Mesh fileformat not supported, it can't be loaded", fileName); #endif if (mesh.vertexCount == 0) TraceLog(WARNING, "Mesh could not be loaded"); else rlglLoadMesh(&mesh, false); // Upload vertex data to GPU (static mesh) // TODO: Initialize default mesh data in case loading fails, maybe a cube? return mesh; } // Load mesh from vertex data // NOTE: All vertex data arrays must be same size: vertexCount Mesh LoadMeshEx(int vertexCount, float *vData, float *vtData, float *vnData, Color *cData) { Mesh mesh = { 0 }; mesh.vertexCount = vertexCount; mesh.triangleCount = vertexCount/3; mesh.vertices = vData; mesh.texcoords = vtData; mesh.texcoords2 = NULL; mesh.normals = vnData; mesh.tangents = NULL; mesh.colors = (unsigned char *)cData; mesh.indices = NULL; rlglLoadMesh(&mesh, false); // Upload vertex data to GPU (static mesh) return mesh; } // Load model from file Model LoadModel(const char *fileName) { Model model = { 0 }; model.mesh = LoadMesh(fileName); model.transform = MatrixIdentity(); model.material = LoadDefaultMaterial(); return model; } // Load model from mesh data Model LoadModelFromMesh(Mesh data, bool dynamic) { Model model = { 0 }; model.mesh = data; rlglLoadMesh(&model.mesh, dynamic); // Upload vertex data to GPU model.transform = MatrixIdentity(); model.material = LoadDefaultMaterial(); return model; } // Load heightmap model from image data // NOTE: model map size is defined in generic units Model LoadHeightmap(Image heightmap, Vector3 size) { Model model = { 0 }; model.mesh = GenMeshHeightmap(heightmap, size); rlglLoadMesh(&model.mesh, false); // Upload vertex data to GPU (static model) model.transform = MatrixIdentity(); model.material = LoadDefaultMaterial(); return model; } // Load cubes-based map model from image data Model LoadCubicmap(Image cubicmap) { Model model = { 0 }; model.mesh = GenMeshCubicmap(cubicmap, (Vector3){ 1.0f, 1.5f, 1.0f }); rlglLoadMesh(&model.mesh, false); // Upload vertex data to GPU (static model) model.transform = MatrixIdentity(); model.material = LoadDefaultMaterial(); return model; } // Unload mesh from memory (RAM and/or VRAM) void UnloadMesh(Mesh *mesh) { rlglUnloadMesh(mesh); } // Unload model from memory (RAM and/or VRAM) void UnloadModel(Model model) { UnloadMesh(&model.mesh); UnloadMaterial(model.material); TraceLog(INFO, "Unloaded model data (mesh and material) from RAM and VRAM"); } // Load material data (from file) Material LoadMaterial(const char *fileName) { Material material = { 0 }; #if defined(SUPPORT_FILEFORMAT_MTL) if (IsFileExtension(fileName, ".mtl")) material = LoadMTL(fileName); #else TraceLog(WARNING, "[%s] Material fileformat not supported, it can't be loaded", fileName); #endif return material; } // Load default material (uses default models shader) Material LoadDefaultMaterial(void) { Material material = { 0 }; material.shader = GetDefaultShader(); material.texDiffuse = GetDefaultTexture(); // White texture (1x1 pixel) //material.texNormal; // NOTE: By default, not set //material.texSpecular; // NOTE: By default, not set material.colDiffuse = WHITE; // Diffuse color material.colAmbient = WHITE; // Ambient color material.colSpecular = WHITE; // Specular color material.glossiness = 100.0f; // Glossiness level return material; } // Unload material from memory void UnloadMaterial(Material material) { rlDeleteTextures(material.texDiffuse.id); rlDeleteTextures(material.texNormal.id); rlDeleteTextures(material.texSpecular.id); } // Generate a mesh from heightmap static Mesh GenMeshHeightmap(Image heightmap, Vector3 size) { #define GRAY_VALUE(c) ((c.r+c.g+c.b)/3) Mesh mesh = { 0 }; int mapX = heightmap.width; int mapZ = heightmap.height; Color *pixels = GetImageData(heightmap); // NOTE: One vertex per pixel int triangleCount = (mapX-1)*(mapZ-1)*2; // One quad every four pixels mesh.vertexCount = triangleCount*3; mesh.vertices = (float *)malloc(mesh.vertexCount*3*sizeof(float)); mesh.normals = (float *)malloc(mesh.vertexCount*3*sizeof(float)); mesh.texcoords = (float *)malloc(mesh.vertexCount*2*sizeof(float)); mesh.colors = NULL; int vCounter = 0; // Used to count vertices float by float int tcCounter = 0; // Used to count texcoords float by float int nCounter = 0; // Used to count normals float by float int trisCounter = 0; Vector3 scaleFactor = { size.x/mapX, size.y/255.0f, size.z/mapZ }; for (int z = 0; z < mapZ-1; z++) { for (int x = 0; x < mapX-1; x++) { // Fill vertices array with data //---------------------------------------------------------- // one triangle - 3 vertex mesh.vertices[vCounter] = (float)x*scaleFactor.x; mesh.vertices[vCounter + 1] = (float)GRAY_VALUE(pixels[x + z*mapX])*scaleFactor.y; mesh.vertices[vCounter + 2] = (float)z*scaleFactor.z; mesh.vertices[vCounter + 3] = (float)x*scaleFactor.x; mesh.vertices[vCounter + 4] = (float)GRAY_VALUE(pixels[x + (z + 1)*mapX])*scaleFactor.y; mesh.vertices[vCounter + 5] = (float)(z + 1)*scaleFactor.z; mesh.vertices[vCounter + 6] = (float)(x + 1)*scaleFactor.x; mesh.vertices[vCounter + 7] = (float)GRAY_VALUE(pixels[(x + 1) + z*mapX])*scaleFactor.y; mesh.vertices[vCounter + 8] = (float)z*scaleFactor.z; // another triangle - 3 vertex mesh.vertices[vCounter + 9] = mesh.vertices[vCounter + 6]; mesh.vertices[vCounter + 10] = mesh.vertices[vCounter + 7]; mesh.vertices[vCounter + 11] = mesh.vertices[vCounter + 8]; mesh.vertices[vCounter + 12] = mesh.vertices[vCounter + 3]; mesh.vertices[vCounter + 13] = mesh.vertices[vCounter + 4]; mesh.vertices[vCounter + 14] = mesh.vertices[vCounter + 5]; mesh.vertices[vCounter + 15] = (float)(x + 1)*scaleFactor.x; mesh.vertices[vCounter + 16] = (float)GRAY_VALUE(pixels[(x + 1) + (z + 1)*mapX])*scaleFactor.y; mesh.vertices[vCounter + 17] = (float)(z + 1)*scaleFactor.z; vCounter += 18; // 6 vertex, 18 floats // Fill texcoords array with data //-------------------------------------------------------------- mesh.texcoords[tcCounter] = (float)x/(mapX - 1); mesh.texcoords[tcCounter + 1] = (float)z/(mapZ - 1); mesh.texcoords[tcCounter + 2] = (float)x/(mapX - 1); mesh.texcoords[tcCounter + 3] = (float)(z + 1)/(mapZ - 1); mesh.texcoords[tcCounter + 4] = (float)(x + 1)/(mapX - 1); mesh.texcoords[tcCounter + 5] = (float)z/(mapZ - 1); mesh.texcoords[tcCounter + 6] = mesh.texcoords[tcCounter + 4]; mesh.texcoords[tcCounter + 7] = mesh.texcoords[tcCounter + 5]; mesh.texcoords[tcCounter + 8] = mesh.texcoords[tcCounter + 2]; mesh.texcoords[tcCounter + 9] = mesh.texcoords[tcCounter + 3]; mesh.texcoords[tcCounter + 10] = (float)(x + 1)/(mapX - 1); mesh.texcoords[tcCounter + 11] = (float)(z + 1)/(mapZ - 1); tcCounter += 12; // 6 texcoords, 12 floats // Fill normals array with data //-------------------------------------------------------------- for (int i = 0; i < 18; i += 3) { mesh.normals[nCounter + i] = 0.0f; mesh.normals[nCounter + i + 1] = 1.0f; mesh.normals[nCounter + i + 2] = 0.0f; } // TODO: Calculate normals in an efficient way nCounter += 18; // 6 vertex, 18 floats trisCounter += 2; } } free(pixels); return mesh; } static Mesh GenMeshCubicmap(Image cubicmap, Vector3 cubeSize) { Mesh mesh = { 0 }; Color *cubicmapPixels = GetImageData(cubicmap); int mapWidth = cubicmap.width; int mapHeight = cubicmap.height; // NOTE: Max possible number of triangles numCubes * (12 triangles by cube) int maxTriangles = cubicmap.width*cubicmap.height*12; int vCounter = 0; // Used to count vertices int tcCounter = 0; // Used to count texcoords int nCounter = 0; // Used to count normals float w = cubeSize.x; float h = cubeSize.z; float h2 = cubeSize.y; Vector3 *mapVertices = (Vector3 *)malloc(maxTriangles*3*sizeof(Vector3)); Vector2 *mapTexcoords = (Vector2 *)malloc(maxTriangles*3*sizeof(Vector2)); Vector3 *mapNormals = (Vector3 *)malloc(maxTriangles*3*sizeof(Vector3)); // Define the 6 normals of the cube, we will combine them accordingly later... Vector3 n1 = { 1.0f, 0.0f, 0.0f }; Vector3 n2 = { -1.0f, 0.0f, 0.0f }; Vector3 n3 = { 0.0f, 1.0f, 0.0f }; Vector3 n4 = { 0.0f, -1.0f, 0.0f }; Vector3 n5 = { 0.0f, 0.0f, 1.0f }; Vector3 n6 = { 0.0f, 0.0f, -1.0f }; // NOTE: We use texture rectangles to define different textures for top-bottom-front-back-right-left (6) typedef struct RectangleF { float x; float y; float width; float height; } RectangleF; RectangleF rightTexUV = { 0.0f, 0.0f, 0.5f, 0.5f }; RectangleF leftTexUV = { 0.5f, 0.0f, 0.5f, 0.5f }; RectangleF frontTexUV = { 0.0f, 0.0f, 0.5f, 0.5f }; RectangleF backTexUV = { 0.5f, 0.0f, 0.5f, 0.5f }; RectangleF topTexUV = { 0.0f, 0.5f, 0.5f, 0.5f }; RectangleF bottomTexUV = { 0.5f, 0.5f, 0.5f, 0.5f }; for (int z = 0; z < mapHeight; ++z) { for (int x = 0; x < mapWidth; ++x) { // Define the 8 vertex of the cube, we will combine them accordingly later... Vector3 v1 = { w*(x - 0.5f), h2, h*(z - 0.5f) }; Vector3 v2 = { w*(x - 0.5f), h2, h*(z + 0.5f) }; Vector3 v3 = { w*(x + 0.5f), h2, h*(z + 0.5f) }; Vector3 v4 = { w*(x + 0.5f), h2, h*(z - 0.5f) }; Vector3 v5 = { w*(x + 0.5f), 0, h*(z - 0.5f) }; Vector3 v6 = { w*(x - 0.5f), 0, h*(z - 0.5f) }; Vector3 v7 = { w*(x - 0.5f), 0, h*(z + 0.5f) }; Vector3 v8 = { w*(x + 0.5f), 0, h*(z + 0.5f) }; // We check pixel color to be WHITE, we will full cubes if ((cubicmapPixels[z*cubicmap.width + x].r == 255) && (cubicmapPixels[z*cubicmap.width + x].g == 255) && (cubicmapPixels[z*cubicmap.width + x].b == 255)) { // Define triangles (Checking Collateral Cubes!) //---------------------------------------------- // Define top triangles (2 tris, 6 vertex --> v1-v2-v3, v1-v3-v4) mapVertices[vCounter] = v1; mapVertices[vCounter + 1] = v2; mapVertices[vCounter + 2] = v3; mapVertices[vCounter + 3] = v1; mapVertices[vCounter + 4] = v3; mapVertices[vCounter + 5] = v4; vCounter += 6; mapNormals[nCounter] = n3; mapNormals[nCounter + 1] = n3; mapNormals[nCounter + 2] = n3; mapNormals[nCounter + 3] = n3; mapNormals[nCounter + 4] = n3; mapNormals[nCounter + 5] = n3; nCounter += 6; mapTexcoords[tcCounter] = (Vector2){ topTexUV.x, topTexUV.y }; mapTexcoords[tcCounter + 1] = (Vector2){ topTexUV.x, topTexUV.y + topTexUV.height }; mapTexcoords[tcCounter + 2] = (Vector2){ topTexUV.x + topTexUV.width, topTexUV.y + topTexUV.height }; mapTexcoords[tcCounter + 3] = (Vector2){ topTexUV.x, topTexUV.y }; mapTexcoords[tcCounter + 4] = (Vector2){ topTexUV.x + topTexUV.width, topTexUV.y + topTexUV.height }; mapTexcoords[tcCounter + 5] = (Vector2){ topTexUV.x + topTexUV.width, topTexUV.y }; tcCounter += 6; // Define bottom triangles (2 tris, 6 vertex --> v6-v8-v7, v6-v5-v8) mapVertices[vCounter] = v6; mapVertices[vCounter + 1] = v8; mapVertices[vCounter + 2] = v7; mapVertices[vCounter + 3] = v6; mapVertices[vCounter + 4] = v5; mapVertices[vCounter + 5] = v8; vCounter += 6; mapNormals[nCounter] = n4; mapNormals[nCounter + 1] = n4; mapNormals[nCounter + 2] = n4; mapNormals[nCounter + 3] = n4; mapNormals[nCounter + 4] = n4; mapNormals[nCounter + 5] = n4; nCounter += 6; mapTexcoords[tcCounter] = (Vector2){ bottomTexUV.x + bottomTexUV.width, bottomTexUV.y }; mapTexcoords[tcCounter + 1] = (Vector2){ bottomTexUV.x, bottomTexUV.y + bottomTexUV.height }; mapTexcoords[tcCounter + 2] = (Vector2){ bottomTexUV.x + bottomTexUV.width, bottomTexUV.y + bottomTexUV.height }; mapTexcoords[tcCounter + 3] = (Vector2){ bottomTexUV.x + bottomTexUV.width, bottomTexUV.y }; mapTexcoords[tcCounter + 4] = (Vector2){ bottomTexUV.x, bottomTexUV.y }; mapTexcoords[tcCounter + 5] = (Vector2){ bottomTexUV.x, bottomTexUV.y + bottomTexUV.height }; tcCounter += 6; if (((z < cubicmap.height - 1) && (cubicmapPixels[(z + 1)*cubicmap.width + x].r == 0) && (cubicmapPixels[(z + 1)*cubicmap.width + x].g == 0) && (cubicmapPixels[(z + 1)*cubicmap.width + x].b == 0)) || (z == cubicmap.height - 1)) { // Define front triangles (2 tris, 6 vertex) --> v2 v7 v3, v3 v7 v8 // NOTE: Collateral occluded faces are not generated mapVertices[vCounter] = v2; mapVertices[vCounter + 1] = v7; mapVertices[vCounter + 2] = v3; mapVertices[vCounter + 3] = v3; mapVertices[vCounter + 4] = v7; mapVertices[vCounter + 5] = v8; vCounter += 6; mapNormals[nCounter] = n6; mapNormals[nCounter + 1] = n6; mapNormals[nCounter + 2] = n6; mapNormals[nCounter + 3] = n6; mapNormals[nCounter + 4] = n6; mapNormals[nCounter + 5] = n6; nCounter += 6; mapTexcoords[tcCounter] = (Vector2){ frontTexUV.x, frontTexUV.y }; mapTexcoords[tcCounter + 1] = (Vector2){ frontTexUV.x, frontTexUV.y + frontTexUV.height }; mapTexcoords[tcCounter + 2] = (Vector2){ frontTexUV.x + frontTexUV.width, frontTexUV.y }; mapTexcoords[tcCounter + 3] = (Vector2){ frontTexUV.x + frontTexUV.width, frontTexUV.y }; mapTexcoords[tcCounter + 4] = (Vector2){ frontTexUV.x, frontTexUV.y + frontTexUV.height }; mapTexcoords[tcCounter + 5] = (Vector2){ frontTexUV.x + frontTexUV.width, frontTexUV.y + frontTexUV.height }; tcCounter += 6; } if (((z > 0) && (cubicmapPixels[(z - 1)*cubicmap.width + x].r == 0) && (cubicmapPixels[(z - 1)*cubicmap.width + x].g == 0) && (cubicmapPixels[(z - 1)*cubicmap.width + x].b == 0)) || (z == 0)) { // Define back triangles (2 tris, 6 vertex) --> v1 v5 v6, v1 v4 v5 // NOTE: Collateral occluded faces are not generated mapVertices[vCounter] = v1; mapVertices[vCounter + 1] = v5; mapVertices[vCounter + 2] = v6; mapVertices[vCounter + 3] = v1; mapVertices[vCounter + 4] = v4; mapVertices[vCounter + 5] = v5; vCounter += 6; mapNormals[nCounter] = n5; mapNormals[nCounter + 1] = n5; mapNormals[nCounter + 2] = n5; mapNormals[nCounter + 3] = n5; mapNormals[nCounter + 4] = n5; mapNormals[nCounter + 5] = n5; nCounter += 6; mapTexcoords[tcCounter] = (Vector2){ backTexUV.x + backTexUV.width, backTexUV.y }; mapTexcoords[tcCounter + 1] = (Vector2){ backTexUV.x, backTexUV.y + backTexUV.height }; mapTexcoords[tcCounter + 2] = (Vector2){ backTexUV.x + backTexUV.width, backTexUV.y + backTexUV.height }; mapTexcoords[tcCounter + 3] = (Vector2){ backTexUV.x + backTexUV.width, backTexUV.y }; mapTexcoords[tcCounter + 4] = (Vector2){ backTexUV.x, backTexUV.y }; mapTexcoords[tcCounter + 5] = (Vector2){ backTexUV.x, backTexUV.y + backTexUV.height }; tcCounter += 6; } if (((x < cubicmap.width - 1) && (cubicmapPixels[z*cubicmap.width + (x + 1)].r == 0) && (cubicmapPixels[z*cubicmap.width + (x + 1)].g == 0) && (cubicmapPixels[z*cubicmap.width + (x + 1)].b == 0)) || (x == cubicmap.width - 1)) { // Define right triangles (2 tris, 6 vertex) --> v3 v8 v4, v4 v8 v5 // NOTE: Collateral occluded faces are not generated mapVertices[vCounter] = v3; mapVertices[vCounter + 1] = v8; mapVertices[vCounter + 2] = v4; mapVertices[vCounter + 3] = v4; mapVertices[vCounter + 4] = v8; mapVertices[vCounter + 5] = v5; vCounter += 6; mapNormals[nCounter] = n1; mapNormals[nCounter + 1] = n1; mapNormals[nCounter + 2] = n1; mapNormals[nCounter + 3] = n1; mapNormals[nCounter + 4] = n1; mapNormals[nCounter + 5] = n1; nCounter += 6; mapTexcoords[tcCounter] = (Vector2){ rightTexUV.x, rightTexUV.y }; mapTexcoords[tcCounter + 1] = (Vector2){ rightTexUV.x, rightTexUV.y + rightTexUV.height }; mapTexcoords[tcCounter + 2] = (Vector2){ rightTexUV.x + rightTexUV.width, rightTexUV.y }; mapTexcoords[tcCounter + 3] = (Vector2){ rightTexUV.x + rightTexUV.width, rightTexUV.y }; mapTexcoords[tcCounter + 4] = (Vector2){ rightTexUV.x, rightTexUV.y + rightTexUV.height }; mapTexcoords[tcCounter + 5] = (Vector2){ rightTexUV.x + rightTexUV.width, rightTexUV.y + rightTexUV.height }; tcCounter += 6; } if (((x > 0) && (cubicmapPixels[z*cubicmap.width + (x - 1)].r == 0) && (cubicmapPixels[z*cubicmap.width + (x - 1)].g == 0) && (cubicmapPixels[z*cubicmap.width + (x - 1)].b == 0)) || (x == 0)) { // Define left triangles (2 tris, 6 vertex) --> v1 v7 v2, v1 v6 v7 // NOTE: Collateral occluded faces are not generated mapVertices[vCounter] = v1; mapVertices[vCounter + 1] = v7; mapVertices[vCounter + 2] = v2; mapVertices[vCounter + 3] = v1; mapVertices[vCounter + 4] = v6; mapVertices[vCounter + 5] = v7; vCounter += 6; mapNormals[nCounter] = n2; mapNormals[nCounter + 1] = n2; mapNormals[nCounter + 2] = n2; mapNormals[nCounter + 3] = n2; mapNormals[nCounter + 4] = n2; mapNormals[nCounter + 5] = n2; nCounter += 6; mapTexcoords[tcCounter] = (Vector2){ leftTexUV.x, leftTexUV.y }; mapTexcoords[tcCounter + 1] = (Vector2){ leftTexUV.x + leftTexUV.width, leftTexUV.y + leftTexUV.height }; mapTexcoords[tcCounter + 2] = (Vector2){ leftTexUV.x + leftTexUV.width, leftTexUV.y }; mapTexcoords[tcCounter + 3] = (Vector2){ leftTexUV.x, leftTexUV.y }; mapTexcoords[tcCounter + 4] = (Vector2){ leftTexUV.x, leftTexUV.y + leftTexUV.height }; mapTexcoords[tcCounter + 5] = (Vector2){ leftTexUV.x + leftTexUV.width, leftTexUV.y + leftTexUV.height }; tcCounter += 6; } } // We check pixel color to be BLACK, we will only draw floor and roof else if ((cubicmapPixels[z*cubicmap.width + x].r == 0) && (cubicmapPixels[z*cubicmap.width + x].g == 0) && (cubicmapPixels[z*cubicmap.width + x].b == 0)) { // Define top triangles (2 tris, 6 vertex --> v1-v2-v3, v1-v3-v4) mapVertices[vCounter] = v1; mapVertices[vCounter + 1] = v3; mapVertices[vCounter + 2] = v2; mapVertices[vCounter + 3] = v1; mapVertices[vCounter + 4] = v4; mapVertices[vCounter + 5] = v3; vCounter += 6; mapNormals[nCounter] = n4; mapNormals[nCounter + 1] = n4; mapNormals[nCounter + 2] = n4; mapNormals[nCounter + 3] = n4; mapNormals[nCounter + 4] = n4; mapNormals[nCounter + 5] = n4; nCounter += 6; mapTexcoords[tcCounter] = (Vector2){ topTexUV.x, topTexUV.y }; mapTexcoords[tcCounter + 1] = (Vector2){ topTexUV.x + topTexUV.width, topTexUV.y + topTexUV.height }; mapTexcoords[tcCounter + 2] = (Vector2){ topTexUV.x, topTexUV.y + topTexUV.height }; mapTexcoords[tcCounter + 3] = (Vector2){ topTexUV.x, topTexUV.y }; mapTexcoords[tcCounter + 4] = (Vector2){ topTexUV.x + topTexUV.width, topTexUV.y }; mapTexcoords[tcCounter + 5] = (Vector2){ topTexUV.x + topTexUV.width, topTexUV.y + topTexUV.height }; tcCounter += 6; // Define bottom triangles (2 tris, 6 vertex --> v6-v8-v7, v6-v5-v8) mapVertices[vCounter] = v6; mapVertices[vCounter + 1] = v7; mapVertices[vCounter + 2] = v8; mapVertices[vCounter + 3] = v6; mapVertices[vCounter + 4] = v8; mapVertices[vCounter + 5] = v5; vCounter += 6; mapNormals[nCounter] = n3; mapNormals[nCounter + 1] = n3; mapNormals[nCounter + 2] = n3; mapNormals[nCounter + 3] = n3; mapNormals[nCounter + 4] = n3; mapNormals[nCounter + 5] = n3; nCounter += 6; mapTexcoords[tcCounter] = (Vector2){ bottomTexUV.x + bottomTexUV.width, bottomTexUV.y }; mapTexcoords[tcCounter + 1] = (Vector2){ bottomTexUV.x + bottomTexUV.width, bottomTexUV.y + bottomTexUV.height }; mapTexcoords[tcCounter + 2] = (Vector2){ bottomTexUV.x, bottomTexUV.y + bottomTexUV.height }; mapTexcoords[tcCounter + 3] = (Vector2){ bottomTexUV.x + bottomTexUV.width, bottomTexUV.y }; mapTexcoords[tcCounter + 4] = (Vector2){ bottomTexUV.x, bottomTexUV.y + bottomTexUV.height }; mapTexcoords[tcCounter + 5] = (Vector2){ bottomTexUV.x, bottomTexUV.y }; tcCounter += 6; } } } // Move data from mapVertices temp arays to vertices float array mesh.vertexCount = vCounter; mesh.vertices = (float *)malloc(mesh.vertexCount*3*sizeof(float)); mesh.normals = (float *)malloc(mesh.vertexCount*3*sizeof(float)); mesh.texcoords = (float *)malloc(mesh.vertexCount*2*sizeof(float)); mesh.colors = NULL; int fCounter = 0; // Move vertices data for (int i = 0; i < vCounter; i++) { mesh.vertices[fCounter] = mapVertices[i].x; mesh.vertices[fCounter + 1] = mapVertices[i].y; mesh.vertices[fCounter + 2] = mapVertices[i].z; fCounter += 3; } fCounter = 0; // Move normals data for (int i = 0; i < nCounter; i++) { mesh.normals[fCounter] = mapNormals[i].x; mesh.normals[fCounter + 1] = mapNormals[i].y; mesh.normals[fCounter + 2] = mapNormals[i].z; fCounter += 3; } fCounter = 0; // Move texcoords data for (int i = 0; i < tcCounter; i++) { mesh.texcoords[fCounter] = mapTexcoords[i].x; mesh.texcoords[fCounter + 1] = mapTexcoords[i].y; fCounter += 2; } free(mapVertices); free(mapNormals); free(mapTexcoords); free(cubicmapPixels); // Free image pixel data return mesh; } // Draw a model (with texture if set) void DrawModel(Model model, Vector3 position, float scale, Color tint) { Vector3 vScale = { scale, scale, scale }; Vector3 rotationAxis = { 0.0f, 0.0f, 0.0f }; DrawModelEx(model, position, rotationAxis, 0.0f, vScale, tint); } // Draw a model with extended parameters void DrawModelEx(Model model, Vector3 position, Vector3 rotationAxis, float rotationAngle, Vector3 scale, Color tint) { // Calculate transformation matrix from function parameters // Get transform matrix (rotation -> scale -> translation) Matrix matRotation = MatrixRotate(rotationAxis, rotationAngle*DEG2RAD); Matrix matScale = MatrixScale(scale.x, scale.y, scale.z); Matrix matTranslation = MatrixTranslate(position.x, position.y, position.z); // Combine model transformation matrix (model.transform) with matrix generated by function parameters (matTransform) //Matrix matModel = MatrixMultiply(model.transform, matTransform); // Transform to world-space coordinates model.transform = MatrixMultiply(MatrixMultiply(matScale, matRotation), matTranslation); model.material.colDiffuse = tint; // TODO: Multiply tint color by diffuse color? rlglDrawMesh(model.mesh, model.material, model.transform); } // Draw a model wires (with texture if set) void DrawModelWires(Model model, Vector3 position, float scale, Color tint) { rlEnableWireMode(); DrawModel(model, position, scale, tint); rlDisableWireMode(); } // Draw a model wires (with texture if set) with extended parameters void DrawModelWiresEx(Model model, Vector3 position, Vector3 rotationAxis, float rotationAngle, Vector3 scale, Color tint) { rlEnableWireMode(); DrawModelEx(model, position, rotationAxis, rotationAngle, scale, tint); rlDisableWireMode(); } // Draw a billboard void DrawBillboard(Camera camera, Texture2D texture, Vector3 center, float size, Color tint) { Rectangle sourceRec = { 0, 0, texture.width, texture.height }; DrawBillboardRec(camera, texture, sourceRec, center, size, tint); } // Draw a billboard (part of a texture defined by a rectangle) void DrawBillboardRec(Camera camera, Texture2D texture, Rectangle sourceRec, Vector3 center, float size, Color tint) { // NOTE: Billboard size will maintain sourceRec aspect ratio, size will represent billboard width Vector2 sizeRatio = { size, size*(float)sourceRec.height/sourceRec.width }; Matrix viewMatrix = MatrixLookAt(camera.position, camera.target, camera.up); MatrixTranspose(&viewMatrix); Vector3 right = { viewMatrix.m0, viewMatrix.m4, viewMatrix.m8 }; //Vector3 up = { viewMatrix.m1, viewMatrix.m5, viewMatrix.m9 }; // NOTE: Billboard locked on axis-Y Vector3 up = { 0.0f, 1.0f, 0.0f }; /* a-------b | | | * | | | d-------c */ VectorScale(&right, sizeRatio.x/2); VectorScale(&up, sizeRatio.y/2); Vector3 p1 = VectorAdd(right, up); Vector3 p2 = VectorSubtract(right, up); Vector3 a = VectorSubtract(center, p2); Vector3 b = VectorAdd(center, p1); Vector3 c = VectorAdd(center, p2); Vector3 d = VectorSubtract(center, p1); rlEnableTexture(texture.id); rlBegin(RL_QUADS); rlColor4ub(tint.r, tint.g, tint.b, tint.a); // Bottom-left corner for texture and quad rlTexCoord2f((float)sourceRec.x/texture.width, (float)sourceRec.y/texture.height); rlVertex3f(a.x, a.y, a.z); // Top-left corner for texture and quad rlTexCoord2f((float)sourceRec.x/texture.width, (float)(sourceRec.y + sourceRec.height)/texture.height); rlVertex3f(d.x, d.y, d.z); // Top-right corner for texture and quad rlTexCoord2f((float)(sourceRec.x + sourceRec.width)/texture.width, (float)(sourceRec.y + sourceRec.height)/texture.height); rlVertex3f(c.x, c.y, c.z); // Bottom-right corner for texture and quad rlTexCoord2f((float)(sourceRec.x + sourceRec.width)/texture.width, (float)sourceRec.y/texture.height); rlVertex3f(b.x, b.y, b.z); rlEnd(); rlDisableTexture(); } // Draw a bounding box with wires void DrawBoundingBox(BoundingBox box, Color color) { Vector3 size; size.x = fabsf(box.max.x - box.min.x); size.y = fabsf(box.max.y - box.min.y); size.z = fabsf(box.max.z - box.min.z); Vector3 center = { box.min.x + size.x/2.0f, box.min.y + size.y/2.0f, box.min.z + size.z/2.0f }; DrawCubeWires(center, size.x, size.y, size.z, color); } // Detect collision between two spheres bool CheckCollisionSpheres(Vector3 centerA, float radiusA, Vector3 centerB, float radiusB) { bool collision = false; float dx = centerA.x - centerB.x; // X distance between centers float dy = centerA.y - centerB.y; // Y distance between centers float dz = centerA.z - centerB.z; // Y distance between centers float distance = sqrtf(dx*dx + dy*dy + dz*dz); // Distance between centers if (distance <= (radiusA + radiusB)) collision = true; return collision; } // Detect collision between two boxes // NOTE: Boxes are defined by two points minimum and maximum bool CheckCollisionBoxes(BoundingBox box1, BoundingBox box2) { bool collision = true; if ((box1.max.x >= box2.min.x) && (box1.min.x <= box2.max.x)) { if ((box1.max.y < box2.min.y) || (box1.min.y > box2.max.y)) collision = false; if ((box1.max.z < box2.min.z) || (box1.min.z > box2.max.z)) collision = false; } else collision = false; return collision; } // Detect collision between box and sphere bool CheckCollisionBoxSphere(BoundingBox box, Vector3 centerSphere, float radiusSphere) { bool collision = false; float dmin = 0; if (centerSphere.x < box.min.x) dmin += powf(centerSphere.x - box.min.x, 2); else if (centerSphere.x > box.max.x) dmin += powf(centerSphere.x - box.max.x, 2); if (centerSphere.y < box.min.y) dmin += powf(centerSphere.y - box.min.y, 2); else if (centerSphere.y > box.max.y) dmin += powf(centerSphere.y - box.max.y, 2); if (centerSphere.z < box.min.z) dmin += powf(centerSphere.z - box.min.z, 2); else if (centerSphere.z > box.max.z) dmin += powf(centerSphere.z - box.max.z, 2); if (dmin <= (radiusSphere*radiusSphere)) collision = true; return collision; } // Detect collision between ray and sphere bool CheckCollisionRaySphere(Ray ray, Vector3 spherePosition, float sphereRadius) { bool collision = false; Vector3 raySpherePos = VectorSubtract(spherePosition, ray.position); float distance = VectorLength(raySpherePos); float vector = VectorDotProduct(raySpherePos, ray.direction); float d = sphereRadius*sphereRadius - (distance*distance - vector*vector); if (d >= 0.0f) collision = true; return collision; } // Detect collision between ray and sphere with extended parameters and collision point detection bool CheckCollisionRaySphereEx(Ray ray, Vector3 spherePosition, float sphereRadius, Vector3 *collisionPoint) { bool collision = false; Vector3 raySpherePos = VectorSubtract(spherePosition, ray.position); float distance = VectorLength(raySpherePos); float vector = VectorDotProduct(raySpherePos, ray.direction); float d = sphereRadius*sphereRadius - (distance*distance - vector*vector); if (d >= 0.0f) collision = true; // Calculate collision point Vector3 offset = ray.direction; float collisionDistance = 0; // Check if ray origin is inside the sphere to calculate the correct collision point if (distance < sphereRadius) collisionDistance = vector + sqrtf(d); else collisionDistance = vector - sqrtf(d); VectorScale(&offset, collisionDistance); Vector3 cPoint = VectorAdd(ray.position, offset); collisionPoint->x = cPoint.x; collisionPoint->y = cPoint.y; collisionPoint->z = cPoint.z; return collision; } // Detect collision between ray and bounding box bool CheckCollisionRayBox(Ray ray, BoundingBox box) { bool collision = false; float t[8]; t[0] = (box.min.x - ray.position.x)/ray.direction.x; t[1] = (box.max.x - ray.position.x)/ray.direction.x; t[2] = (box.min.y - ray.position.y)/ray.direction.y; t[3] = (box.max.y - ray.position.y)/ray.direction.y; t[4] = (box.min.z - ray.position.z)/ray.direction.z; t[5] = (box.max.z - ray.position.z)/ray.direction.z; t[6] = (float)fmax(fmax(fmin(t[0], t[1]), fmin(t[2], t[3])), fmin(t[4], t[5])); t[7] = (float)fmin(fmin(fmax(t[0], t[1]), fmax(t[2], t[3])), fmax(t[4], t[5])); collision = !(t[7] < 0 || t[6] > t[7]); return collision; } // Get collision info between ray and mesh RayHitInfo GetCollisionRayMesh(Ray ray, Mesh *mesh) { RayHitInfo result = { 0 }; // If mesh doesn't have vertex data on CPU, can't test it. if (!mesh->vertices) return result; // mesh->triangleCount may not be set, vertexCount is more reliable int triangleCount = mesh->vertexCount/3; // Test against all triangles in mesh for (int i = 0; i < triangleCount; i++) { Vector3 a, b, c; Vector3 *vertdata = (Vector3 *)mesh->vertices; if (mesh->indices) { a = vertdata[mesh->indices[i*3 + 0]]; b = vertdata[mesh->indices[i*3 + 1]]; c = vertdata[mesh->indices[i*3 + 2]]; } else { a = vertdata[i*3 + 0]; b = vertdata[i*3 + 1]; c = vertdata[i*3 + 2]; } RayHitInfo triHitInfo = GetCollisionRayTriangle(ray, a, b, c); if (triHitInfo.hit) { // Save the closest hit triangle if ((!result.hit) || (result.distance > triHitInfo.distance)) result = triHitInfo; } } return result; } // Get collision info between ray and triangle // NOTE: Based on https://en.wikipedia.org/wiki/M%C3%B6ller%E2%80%93Trumbore_intersection_algorithm RayHitInfo GetCollisionRayTriangle(Ray ray, Vector3 p1, Vector3 p2, Vector3 p3) { #define EPSILON 0.000001 // A small number Vector3 edge1, edge2; Vector3 p, q, tv; float det, invDet, u, v, t; RayHitInfo result = {0}; // Find vectors for two edges sharing V1 edge1 = VectorSubtract(p2, p1); edge2 = VectorSubtract(p3, p1); // Begin calculating determinant - also used to calculate u parameter p = VectorCrossProduct(ray.direction, edge2); // If determinant is near zero, ray lies in plane of triangle or ray is parallel to plane of triangle det = VectorDotProduct(edge1, p); // Avoid culling! if ((det > -EPSILON) && (det < EPSILON)) return result; invDet = 1.0f/det; // Calculate distance from V1 to ray origin tv = VectorSubtract(ray.position, p1); // Calculate u parameter and test bound u = VectorDotProduct(tv, p)*invDet; // The intersection lies outside of the triangle if ((u < 0.0f) || (u > 1.0f)) return result; // Prepare to test v parameter q = VectorCrossProduct(tv, edge1); // Calculate V parameter and test bound v = VectorDotProduct(ray.direction, q)*invDet; // The intersection lies outside of the triangle if ((v < 0.0f) || ((u + v) > 1.0f)) return result; t = VectorDotProduct(edge2, q)*invDet; if (t > EPSILON) { // Ray hit, get hit point and normal result.hit = true; result.distance = t; result.hit = true; result.hitNormal = VectorCrossProduct(edge1, edge2); VectorNormalize(&result.hitNormal); Vector3 rayDir = ray.direction; VectorScale(&rayDir, t); result.hitPosition = VectorAdd(ray.position, rayDir); } return result; } // Get collision info between ray and ground plane (Y-normal plane) RayHitInfo GetCollisionRayGround(Ray ray, float groundHeight) { #define EPSILON 0.000001 // A small number RayHitInfo result = { 0 }; if (fabsf(ray.direction.y) > EPSILON) { float t = (ray.position.y - groundHeight)/-ray.direction.y; if (t >= 0.0) { Vector3 rayDir = ray.direction; VectorScale(&rayDir, t); result.hit = true; result.distance = t; result.hitNormal = (Vector3){ 0.0, 1.0, 0.0 }; result.hitPosition = VectorAdd(ray.position, rayDir); } } return result; } // Calculate mesh bounding box limits // NOTE: minVertex and maxVertex should be transformed by model transform matrix (position, scale, rotate) BoundingBox CalculateBoundingBox(Mesh mesh) { // Get min and max vertex to construct bounds (AABB) Vector3 minVertex = { 0 }; Vector3 maxVertex = { 0 }; if (mesh.vertices != NULL) { minVertex = (Vector3){ mesh.vertices[0], mesh.vertices[1], mesh.vertices[2] }; maxVertex = (Vector3){ mesh.vertices[0], mesh.vertices[1], mesh.vertices[2] }; for (int i = 1; i < mesh.vertexCount; i++) { minVertex = VectorMin(minVertex, (Vector3){ mesh.vertices[i*3], mesh.vertices[i*3 + 1], mesh.vertices[i*3 + 2] }); maxVertex = VectorMax(maxVertex, (Vector3){ mesh.vertices[i*3], mesh.vertices[i*3 + 1], mesh.vertices[i*3 + 2] }); } } // Create the bounding box BoundingBox box; box.min = minVertex; box.max = maxVertex; return box; } //---------------------------------------------------------------------------------- // Module specific Functions Definition //---------------------------------------------------------------------------------- #if defined(SUPPORT_FILEFORMAT_OBJ) // Load OBJ mesh data static Mesh LoadOBJ(const char *fileName) { Mesh mesh = { 0 }; char dataType; char comments[200]; int vertexCount = 0; int normalCount = 0; int texcoordCount = 0; int triangleCount = 0; FILE *objFile; objFile = fopen(fileName, "rt"); if (objFile == NULL) { TraceLog(WARNING, "[%s] OBJ file could not be opened", fileName); return mesh; } // First reading pass: Get vertexCount, normalCount, texcoordCount, triangleCount // NOTE: vertex, texcoords and normals could be optimized (to be used indexed on faces definition) // NOTE: faces MUST be defined as TRIANGLES (3 vertex per face) while (!feof(objFile)) { fscanf(objFile, "%c", &dataType); switch (dataType) { case '#': // Comments case 'o': // Object name (One OBJ file can contain multible named meshes) case 'g': // Group name case 's': // Smoothing level case 'm': // mtllib [external .mtl file name] case 'u': // usemtl [material name] { fgets(comments, 200, objFile); } break; case 'v': { fscanf(objFile, "%c", &dataType); if (dataType == 't') // Read texCoord { texcoordCount++; fgets(comments, 200, objFile); } else if (dataType == 'n') // Read normals { normalCount++; fgets(comments, 200, objFile); } else // Read vertex { vertexCount++; fgets(comments, 200, objFile); } } break; case 'f': { triangleCount++; fgets(comments, 200, objFile); } break; default: break; } } TraceLog(DEBUG, "[%s] Model vertices: %i", fileName, vertexCount); TraceLog(DEBUG, "[%s] Model texcoords: %i", fileName, texcoordCount); TraceLog(DEBUG, "[%s] Model normals: %i", fileName, normalCount); TraceLog(DEBUG, "[%s] Model triangles: %i", fileName, triangleCount); // Once we know the number of vertices to store, we create required arrays Vector3 *midVertices = (Vector3 *)malloc(vertexCount*sizeof(Vector3)); Vector3 *midNormals = NULL; if (normalCount > 0) midNormals = (Vector3 *)malloc(normalCount*sizeof(Vector3)); Vector2 *midTexCoords = NULL; if (texcoordCount > 0) midTexCoords = (Vector2 *)malloc(texcoordCount*sizeof(Vector2)); int countVertex = 0; int countNormals = 0; int countTexCoords = 0; rewind(objFile); // Return to the beginning of the file, to read again // Second reading pass: Get vertex data to fill intermediate arrays // NOTE: This second pass is required in case of multiple meshes defined in same OBJ // TODO: Consider that different meshes can have different vertex data available (position, texcoords, normals) while (!feof(objFile)) { fscanf(objFile, "%c", &dataType); switch (dataType) { case '#': case 'o': case 'g': case 's': case 'm': case 'u': case 'f': fgets(comments, 200, objFile); break; case 'v': { fscanf(objFile, "%c", &dataType); if (dataType == 't') // Read texCoord { fscanf(objFile, "%f %f%*[^\n]s\n", &midTexCoords[countTexCoords].x, &midTexCoords[countTexCoords].y); countTexCoords++; fscanf(objFile, "%c", &dataType); } else if (dataType == 'n') // Read normals { fscanf(objFile, "%f %f %f", &midNormals[countNormals].x, &midNormals[countNormals].y, &midNormals[countNormals].z); countNormals++; fscanf(objFile, "%c", &dataType); } else // Read vertex { fscanf(objFile, "%f %f %f", &midVertices[countVertex].x, &midVertices[countVertex].y, &midVertices[countVertex].z); countVertex++; fscanf(objFile, "%c", &dataType); } } break; default: break; } } // At this point all vertex data (v, vt, vn) has been gathered on midVertices, midTexCoords, midNormals // Now we can organize that data into our Mesh struct mesh.vertexCount = triangleCount*3; // Additional arrays to store vertex data as floats mesh.vertices = (float *)malloc(mesh.vertexCount*3*sizeof(float)); mesh.texcoords = (float *)malloc(mesh.vertexCount*2*sizeof(float)); mesh.normals = (float *)malloc(mesh.vertexCount*3*sizeof(float)); mesh.colors = NULL; int vCounter = 0; // Used to count vertices float by float int tcCounter = 0; // Used to count texcoords float by float int nCounter = 0; // Used to count normals float by float int vCount[3], vtCount[3], vnCount[3]; // Used to store triangle indices for v, vt, vn rewind(objFile); // Return to the beginning of the file, to read again if (normalCount == 0) TraceLog(INFO, "[%s] No normals data on OBJ, normals will be generated from faces data", fileName); // Third reading pass: Get faces (triangles) data and fill VertexArray while (!feof(objFile)) { fscanf(objFile, "%c", &dataType); switch (dataType) { case '#': case 'o': case 'g': case 's': case 'm': case 'u': case 'v': fgets(comments, 200, objFile); break; case 'f': { // NOTE: It could be that OBJ does not have normals or texcoords defined! if ((normalCount == 0) && (texcoordCount == 0)) fscanf(objFile, "%i %i %i", &vCount[0], &vCount[1], &vCount[2]); else if (normalCount == 0) fscanf(objFile, "%i/%i %i/%i %i/%i", &vCount[0], &vtCount[0], &vCount[1], &vtCount[1], &vCount[2], &vtCount[2]); else if (texcoordCount == 0) fscanf(objFile, "%i//%i %i//%i %i//%i", &vCount[0], &vnCount[0], &vCount[1], &vnCount[1], &vCount[2], &vnCount[2]); else fscanf(objFile, "%i/%i/%i %i/%i/%i %i/%i/%i", &vCount[0], &vtCount[0], &vnCount[0], &vCount[1], &vtCount[1], &vnCount[1], &vCount[2], &vtCount[2], &vnCount[2]); mesh.vertices[vCounter] = midVertices[vCount[0]-1].x; mesh.vertices[vCounter + 1] = midVertices[vCount[0]-1].y; mesh.vertices[vCounter + 2] = midVertices[vCount[0]-1].z; vCounter += 3; mesh.vertices[vCounter] = midVertices[vCount[1]-1].x; mesh.vertices[vCounter + 1] = midVertices[vCount[1]-1].y; mesh.vertices[vCounter + 2] = midVertices[vCount[1]-1].z; vCounter += 3; mesh.vertices[vCounter] = midVertices[vCount[2]-1].x; mesh.vertices[vCounter + 1] = midVertices[vCount[2]-1].y; mesh.vertices[vCounter + 2] = midVertices[vCount[2]-1].z; vCounter += 3; if (normalCount > 0) { mesh.normals[nCounter] = midNormals[vnCount[0]-1].x; mesh.normals[nCounter + 1] = midNormals[vnCount[0]-1].y; mesh.normals[nCounter + 2] = midNormals[vnCount[0]-1].z; nCounter += 3; mesh.normals[nCounter] = midNormals[vnCount[1]-1].x; mesh.normals[nCounter + 1] = midNormals[vnCount[1]-1].y; mesh.normals[nCounter + 2] = midNormals[vnCount[1]-1].z; nCounter += 3; mesh.normals[nCounter] = midNormals[vnCount[2]-1].x; mesh.normals[nCounter + 1] = midNormals[vnCount[2]-1].y; mesh.normals[nCounter + 2] = midNormals[vnCount[2]-1].z; nCounter += 3; } else { // If normals not defined, they are calculated from the 3 vertices [N = (V2 - V1) x (V3 - V1)] Vector3 norm = VectorCrossProduct(VectorSubtract(midVertices[vCount[1]-1], midVertices[vCount[0]-1]), VectorSubtract(midVertices[vCount[2]-1], midVertices[vCount[0]-1])); VectorNormalize(&norm); mesh.normals[nCounter] = norm.x; mesh.normals[nCounter + 1] = norm.y; mesh.normals[nCounter + 2] = norm.z; nCounter += 3; mesh.normals[nCounter] = norm.x; mesh.normals[nCounter + 1] = norm.y; mesh.normals[nCounter + 2] = norm.z; nCounter += 3; mesh.normals[nCounter] = norm.x; mesh.normals[nCounter + 1] = norm.y; mesh.normals[nCounter + 2] = norm.z; nCounter += 3; } if (texcoordCount > 0) { // NOTE: If using negative texture coordinates with a texture filter of GL_CLAMP_TO_EDGE doesn't work! // NOTE: Texture coordinates are Y flipped upside-down mesh.texcoords[tcCounter] = midTexCoords[vtCount[0]-1].x; mesh.texcoords[tcCounter + 1] = 1.0f - midTexCoords[vtCount[0]-1].y; tcCounter += 2; mesh.texcoords[tcCounter] = midTexCoords[vtCount[1]-1].x; mesh.texcoords[tcCounter + 1] = 1.0f - midTexCoords[vtCount[1]-1].y; tcCounter += 2; mesh.texcoords[tcCounter] = midTexCoords[vtCount[2]-1].x; mesh.texcoords[tcCounter + 1] = 1.0f - midTexCoords[vtCount[2]-1].y; tcCounter += 2; } } break; default: break; } } fclose(objFile); // Security check, just in case no normals or no texcoords defined in OBJ if (texcoordCount == 0) for (int i = 0; i < (2*mesh.vertexCount); i++) mesh.texcoords[i] = 0.0f; else { // Attempt to calculate mesh tangents and binormals using positions and texture coordinates mesh.tangents = (float *)malloc(mesh.vertexCount*3*sizeof(float)); // mesh.binormals = (float *)malloc(mesh.vertexCount*3*sizeof(float)); int vCount = 0; int uvCount = 0; while (vCount < mesh.vertexCount*3) { // Calculate mesh vertex positions as Vector3 Vector3 v0 = { mesh.vertices[vCount], mesh.vertices[vCount + 1], mesh.vertices[vCount + 2] }; Vector3 v1 = { mesh.vertices[vCount + 3], mesh.vertices[vCount + 4], mesh.vertices[vCount + 5] }; Vector3 v2 = { mesh.vertices[vCount + 6], mesh.vertices[vCount + 7], mesh.vertices[vCount + 8] }; // Calculate mesh texture coordinates as Vector2 Vector2 uv0 = { mesh.texcoords[uvCount + 0], mesh.texcoords[uvCount + 1] }; Vector2 uv1 = { mesh.texcoords[uvCount + 2], mesh.texcoords[uvCount + 3] }; Vector2 uv2 = { mesh.texcoords[uvCount + 4], mesh.texcoords[uvCount + 5] }; // Calculate edges of the triangle (position delta) Vector3 deltaPos1 = VectorSubtract(v1, v0); Vector3 deltaPos2 = VectorSubtract(v2, v0); // UV delta Vector2 deltaUV1 = { uv1.x - uv0.x, uv1.y - uv0.y }; Vector2 deltaUV2 = { uv2.x - uv0.x, uv2.y - uv0.y }; float r = 1.0f/(deltaUV1.x*deltaUV2.y - deltaUV1.y*deltaUV2.x); Vector3 t1 = { deltaPos1.x*deltaUV2.y, deltaPos1.y*deltaUV2.y, deltaPos1.z*deltaUV2.y }; Vector3 t2 = { deltaPos2.x*deltaUV1.y, deltaPos2.y*deltaUV1.y, deltaPos2.z*deltaUV1.y }; // Vector3 b1 = { deltaPos2.x*deltaUV1.x, deltaPos2.y*deltaUV1.x, deltaPos2.z*deltaUV1.x }; // Vector3 b2 = { deltaPos1.x*deltaUV2.x, deltaPos1.y*deltaUV2.x, deltaPos1.z*deltaUV2.x }; // Calculate vertex tangent Vector3 tangent = VectorSubtract(t1, t2); VectorScale(&tangent, r); // Apply calculated tangents data to mesh struct mesh.tangents[vCount + 0] = tangent.x; mesh.tangents[vCount + 1] = tangent.y; mesh.tangents[vCount + 2] = tangent.z; mesh.tangents[vCount + 3] = tangent.x; mesh.tangents[vCount + 4] = tangent.y; mesh.tangents[vCount + 5] = tangent.z; mesh.tangents[vCount + 6] = tangent.x; mesh.tangents[vCount + 7] = tangent.y; mesh.tangents[vCount + 8] = tangent.z; // TODO: add binormals to mesh struct and assign buffers id and locations properly /* // Calculate vertex binormal Vector3 binormal = VectorSubtract(b1, b2); VectorScale(&binormal, r); // Apply calculated binormals data to mesh struct mesh.binormals[vCount + 0] = binormal.x; mesh.binormals[vCount + 1] = binormal.y; mesh.binormals[vCount + 2] = binormal.z; mesh.binormals[vCount + 3] = binormal.x; mesh.binormals[vCount + 4] = binormal.y; mesh.binormals[vCount + 5] = binormal.z; mesh.binormals[vCount + 6] = binormal.x; mesh.binormals[vCount + 7] = binormal.y; mesh.binormals[vCount + 8] = binormal.z; */ // Update vertex position and texture coordinates counters vCount += 9; uvCount += 6; } } // Now we can free temp mid* arrays free(midVertices); free(midNormals); free(midTexCoords); // NOTE: At this point we have all vertex, texcoord, normal data for the model in mesh struct TraceLog(INFO, "[%s] Model loaded successfully in RAM (CPU)", fileName); return mesh; } #endif #if defined(SUPPORT_FILEFORMAT_MTL) // Load MTL material data (specs: http://paulbourke.net/dataformats/mtl/) // NOTE: Texture map parameters are not supported static Material LoadMTL(const char *fileName) { #define MAX_BUFFER_SIZE 128 Material material = { 0 }; // LoadDefaultMaterial(); char buffer[MAX_BUFFER_SIZE]; Vector3 color = { 1.0f, 1.0f, 1.0f }; char mapFileName[128]; int result = 0; FILE *mtlFile; mtlFile = fopen(fileName, "rt"); if (mtlFile == NULL) { TraceLog(WARNING, "[%s] MTL file could not be opened", fileName); return material; } while (!feof(mtlFile)) { fgets(buffer, MAX_BUFFER_SIZE, mtlFile); switch (buffer[0]) { case 'n': // newmtl string Material name. Begins a new material description. { // TODO: Support multiple materials in a single .mtl sscanf(buffer, "newmtl %s", mapFileName); TraceLog(INFO, "[%s] Loading material...", mapFileName); } case 'i': // illum int Illumination model { // illum = 1 if specular disabled // illum = 2 if specular enabled (lambertian model) // ... } case 'K': // Ka, Kd, Ks, Ke { switch (buffer[1]) { case 'a': // Ka float float float Ambient color (RGB) { sscanf(buffer, "Ka %f %f %f", &color.x, &color.y, &color.z); material.colAmbient.r = (unsigned char)(color.x*255); material.colAmbient.g = (unsigned char)(color.y*255); material.colAmbient.b = (unsigned char)(color.z*255); } break; case 'd': // Kd float float float Diffuse color (RGB) { sscanf(buffer, "Kd %f %f %f", &color.x, &color.y, &color.z); material.colDiffuse.r = (unsigned char)(color.x*255); material.colDiffuse.g = (unsigned char)(color.y*255); material.colDiffuse.b = (unsigned char)(color.z*255); } break; case 's': // Ks float float float Specular color (RGB) { sscanf(buffer, "Ks %f %f %f", &color.x, &color.y, &color.z); material.colSpecular.r = (unsigned char)(color.x*255); material.colSpecular.g = (unsigned char)(color.y*255); material.colSpecular.b = (unsigned char)(color.z*255); } break; case 'e': // Ke float float float Emmisive color (RGB) { // TODO: Support Ke ? } break; default: break; } } break; case 'N': // Ns, Ni { if (buffer[1] == 's') // Ns int Shininess (specular exponent). Ranges from 0 to 1000. { int shininess = 0; sscanf(buffer, "Ns %i", &shininess); material.glossiness = (float)shininess; } else if (buffer[1] == 'i') // Ni int Refraction index. { // Not supported... } } break; case 'm': // map_Kd, map_Ks, map_Ka, map_Bump, map_d { switch (buffer[4]) { case 'K': // Color texture maps { if (buffer[5] == 'd') // map_Kd string Diffuse color texture map. { result = sscanf(buffer, "map_Kd %s", mapFileName); if (result != EOF) material.texDiffuse = LoadTexture(mapFileName); } else if (buffer[5] == 's') // map_Ks string Specular color texture map. { result = sscanf(buffer, "map_Ks %s", mapFileName); if (result != EOF) material.texSpecular = LoadTexture(mapFileName); } else if (buffer[5] == 'a') // map_Ka string Ambient color texture map. { // Not supported... } } break; case 'B': // map_Bump string Bump texture map. { result = sscanf(buffer, "map_Bump %s", mapFileName); if (result != EOF) material.texNormal = LoadTexture(mapFileName); } break; case 'b': // map_bump string Bump texture map. { result = sscanf(buffer, "map_bump %s", mapFileName); if (result != EOF) material.texNormal = LoadTexture(mapFileName); } break; case 'd': // map_d string Opacity texture map. { // Not supported... } break; default: break; } } break; case 'd': // d, disp { if (buffer[1] == ' ') // d float Dissolve factor. d is inverse of Tr { float alpha = 1.0f; sscanf(buffer, "d %f", &alpha); material.colDiffuse.a = (unsigned char)(alpha*255); } else if (buffer[1] == 'i') // disp string Displacement map { // Not supported... } } break; case 'b': // bump string Bump texture map { result = sscanf(buffer, "bump %s", mapFileName); if (result != EOF) material.texNormal = LoadTexture(mapFileName); } break; case 'T': // Tr float Transparency Tr (alpha). Tr is inverse of d { float ialpha = 0.0f; sscanf(buffer, "Tr %f", &ialpha); material.colDiffuse.a = (unsigned char)((1.0f - ialpha)*255); } break; case 'r': // refl string Reflection texture map default: break; } } fclose(mtlFile); // NOTE: At this point we have all material data TraceLog(INFO, "[%s] Material loaded successfully", fileName); return material; } #endif