122 lines
5.6 KiB
C
122 lines
5.6 KiB
C
/*******************************************************************************************
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*
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* raylib [shaders] example - Apply a postprocessing shader and connect a custom uniform variable
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*
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* NOTE: This example requires raylib OpenGL 3.3 or ES2 versions for shaders support,
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* OpenGL 1.1 does not support shaders, recompile raylib to OpenGL 3.3 version.
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*
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* NOTE: Shaders used in this example are #version 330 (OpenGL 3.3), to test this example
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* on OpenGL ES 2.0 platforms (Android, Raspberry Pi, HTML5), use #version 100 shaders
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* raylib comes with shaders ready for both versions, check raylib/shaders install folder
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*
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* This example has been created using raylib 1.3 (www.raylib.com)
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* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
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*
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* Copyright (c) 2015 Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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#include "raylib.h"
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int main()
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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int screenWidth = 800;
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int screenHeight = 450;
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SetConfigFlags(FLAG_MSAA_4X_HINT); // Enable Multi Sampling Anti Aliasing 4x (if available)
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InitWindow(screenWidth, screenHeight, "raylib [shaders] example - custom uniform variable");
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// Define the camera to look into our 3d world
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Camera camera = {{ 3.0f, 3.0f, 3.0f }, { 0.0f, 1.5f, 0.0f }, { 0.0f, 1.0f, 0.0f }, 45.0f };
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Model dwarf = LoadModel("resources/model/dwarf.obj"); // Load OBJ model
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Texture2D texture = LoadTexture("resources/model/dwarf_diffuse.png"); // Load model texture
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SetModelTexture(&dwarf, texture); // Bind texture to model
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Vector3 position = { 0.0f, 0.0f, 0.0f }; // Set model position
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Shader shader = LoadShader("resources/shaders/base.vs",
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"resources/shaders/swirl.fs"); // Load postpro shader
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// Get variable (uniform) location on the shader to connect with the program
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// NOTE: If uniform variable could not be found in the shader, function returns -1
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int swirlCenterLoc = GetShaderLocation(shader, "center");
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float swirlCenter[2] = { (float)screenWidth/2, (float)screenHeight/2 };
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// NOTE: Old postprocessing system is not flexible enough despite being very easy to use
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//SetPostproShader(shader); // Set fullscreen postprocessing shader
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// New postprocessing system let the user create multiple RenderTexture2D and perform multiple render passes
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RenderTexture2D target = LoadRenderTexture(screenWidth, screenHeight);
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// Setup orbital camera
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SetCameraMode(CAMERA_ORBITAL); // Set an orbital camera mode
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SetCameraPosition(camera.position); // Set internal camera position to match our camera position
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SetCameraTarget(camera.target); // Set internal camera target to match our camera target
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SetTargetFPS(60); // Set our game to run at 60 frames-per-second
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//--------------------------------------------------------------------------------------
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// Main game loop
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while (!WindowShouldClose()) // Detect window close button or ESC key
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{
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// Update
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//----------------------------------------------------------------------------------
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Vector2 mousePosition = GetMousePosition();
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swirlCenter[0] = mousePosition.x;
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swirlCenter[1] = screenHeight - mousePosition.y;
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// Send new value to the shader to be used on drawing
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SetShaderValue(shader, swirlCenterLoc, swirlCenter, 2);
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UpdateCamera(&camera); // Update internal camera and our camera
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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ClearBackground(RAYWHITE);
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BeginTextureMode(target); // Enable render to texture RenderTexture2D
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Begin3dMode(camera);
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DrawModel(dwarf, position, 2.0f, WHITE); // Draw 3d model with texture
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DrawGrid(10, 1.0f); // Draw a grid
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End3dMode();
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EndTextureMode(); // End drawing to texture (now we have a texture available for next passes)
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SetCustomShader(shader);
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// NOTE: Render texture must be y-flipped due to default OpenGL coordinates (left-bottom)
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DrawTextureRec(target.texture, (Rectangle){ 0, target.texture.height, target.texture.width, -target.texture.height }, (Vector2){ 0, 0 }, WHITE);
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SetDefaultShader();
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DrawText("(c) Dwarf 3D model by David Moreno", screenWidth - 200, screenHeight - 20, 10, GRAY);
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DrawFPS(10, 10);
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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// De-Initialization
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//--------------------------------------------------------------------------------------
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UnloadShader(shader); // Unload shader
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UnloadTexture(texture); // Unload texture
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UnloadModel(dwarf); // Unload model
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UnloadRenderTexture(target); // Unload render texture
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CloseWindow(); // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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return 0;
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} |