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new models_magicavoxel_loading example (#1940)

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* new models_magicavoxel_loading example

* Portable header-only file "magicavoxel_loader.h" for MagicaVoxel loader example.

* models_magicavoxel_loading example added to CMakeLists.txt and Makefile

* fix models_magicavoxel_loading example for linux.

* * vox_loader into "src/external/vox_loader.h"
 * vox file support for "models.c"
 * updated example "models/models_magicavoxel_loading.c"

* * Fix Vox_FreeArrays (removed memory leak)

* * removed magicavoxel_loader.h

* * Revert vs2019 solution
This commit is contained in:
procfxgen 2021-09-04 19:55:09 +02:00 committed by GitHub
parent 93168304cd
commit dfc465ca6d
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GPG Key ID: 4AEE18F83AFDEB23
11 changed files with 1445 additions and 1 deletions
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2
examples/CMakeLists.txt
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@ -86,7 +86,9 @@ if (${PLATFORM} MATCHES "Android")
list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_obj_viewer.c)
list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_animation.c)
list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_first_person_maze.c)
list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/models/models_magicavoxel_loading.c)
list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/shaders/shaders_custom_uniform.c)
list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/shaders/shaders_model_shader.c)
list(REMOVE_ITEM example_sources ${CMAKE_CURRENT_SOURCE_DIR}/shaders/shaders_postprocessing.c)

3
examples/Makefile
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@ -466,7 +466,8 @@ MODELS = \
models/models_skybox \
models/models_yaw_pitch_roll \
models/models_heightmap \
models/models_waving_cubes
models/models_waving_cubes \
models/models_magicavoxel_loading
SHADERS = \
shaders/shaders_model_shader \

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examples/models/models_magicavoxel_loading.c Normal file
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/*******************************************************************************************
*
* raylib [models] example - magicavoxel loader and viewer
*
* This example has been created using raylib 3.8 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
*
* Example contributed by Johann Nadalutti
*
* Copyright (c) 2021 Johann Nadalutti
*
********************************************************************************************/
#include "raylib.h"
#include "raymath.h"
#include <string.h>
// VOX Files to load and view
#define NUM_VOX_FILES 3
const char* szVoxFiles[] = {
"resources/vox/chr_knight.vox",
"resources/vox/chr_sword.vox",
"resources/vox/monu9.vox"
};
int main(void)
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [models] example - magicavoxel loading");
// Load MagicaVoxel files
Model models[NUM_VOX_FILES] = { 0 };
for (int i = 0; i < NUM_VOX_FILES; i++)
{
// Load MagicaVoxel File and build model
double t0, t1;
t0 = GetTime() * 1000.0;
models[i] = LoadModel(szVoxFiles[i]);
t1 = GetTime() * 1000.0;
TraceLog(LOG_INFO, TextFormat("Vox <%s> loaded in %f ms", GetFileName(szVoxFiles[i]), t1 - t0));
//Compute model matrix
BoundingBox bb = GetModelBoundingBox(models[i]);
Vector3 center;
center.x = -(((bb.max.x - bb.min.x) / 2));
center.y = -(((bb.max.y - bb.min.y) / 2));
center.z = -(((bb.max.z - bb.min.z) / 2));
Matrix matP = MatrixTranslate(center.x, center.z, 0);
Matrix matR = MatrixRotateX(90 * DEG2RAD);
models[i].transform = MatrixMultiply(matP, matR);
}
// Define the camera to look into our 3d world
Camera camera = { { 0.0f, 10.0f, 10.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 1.0f, 0.0f }, 45.0f, 0 };
// Model drawing position
Vector3 position = { 0.0f, 0.0f, 0.0f };
int currentModel = 0;
SetCameraMode(camera, CAMERA_ORBITAL); // Set a orbital camera mode
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
//--------------------------------------------------------------------------------------
while (!WindowShouldClose()) // Detect window close button or ESC key
{
//--------------------------------------------------------------------------------------
// Update
//----------------------------------------------------------------------------------
UpdateCamera(&camera); // Update internal camera and our camera
if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT))
{
currentModel = (currentModel + 1) % NUM_VOX_FILES; // Cycle between models
}
if (IsKeyPressed(KEY_RIGHT))
{
currentModel++;
if (currentModel >= NUM_VOX_FILES) currentModel = 0;
}
else if (IsKeyPressed(KEY_LEFT))
{
currentModel--;
if (currentModel < 0) currentModel = NUM_VOX_FILES - 1;
}
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
//Display model
BeginMode3D(camera);
Vector3 rotAxis = { 1,0,0 };
Vector3 scale = { 1,1,1 };
DrawModelEx(models[currentModel], position, rotAxis, 0, scale, WHITE);
//DrawModelWiresEx(models[currentModel], position, rotAxis, -90.0f, scale, BLACK);
DrawGrid(10, 1.0);
EndMode3D();
//Display debug infos
DrawRectangle(30, 400, 310, 30, Fade(SKYBLUE, 0.5f));
DrawRectangleLines(30, 400, 310, 30, Fade(DARKBLUE, 0.5f));
DrawText("MOUSE LEFT BUTTON to CYCLE VOX MODELS", 40, 410, 10, BLUE);
DrawText(GetFileName(szVoxFiles[currentModel]), 100, 10, 20, DARKBLUE);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
// Unload models data (GPU VRAM)
for (int i = 0; i < NUM_VOX_FILES; i++) UnloadModel(models[i]);
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}

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projects/VS2019/examples/models_mesh_magicavoxel_loading.vcxproj Normal file
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@ -0,0 +1,387 @@
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<AdditionalIncludeDirectories>$(SolutionDir)..\..\src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<CompileAs>CompileAsC</CompileAs>
<RemoveUnreferencedCodeData>true</RemoveUnreferencedCodeData>
</ClCompile>
<Link>
<SubSystem>Console</SubSystem>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
<OptimizeReferences>true</OptimizeReferences>
<GenerateDebugInformation>true</GenerateDebugInformation>
<AdditionalDependencies>raylib.lib;opengl32.lib;kernel32.lib;user32.lib;gdi32.lib;winmm.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalLibraryDirectories>$(SolutionDir)\build\raylib\bin\$(Platform)\$(Configuration)\</AdditionalLibraryDirectories>
</Link>
<PostBuildEvent>
<Command>xcopy /y /d "$(SolutionDir)\build\raylib\bin\$(Platform)\$(Configuration)\raylib.dll" "$(SolutionDir)\build\$(ProjectName)\bin\$(Platform)\$(Configuration)"</Command>
</PostBuildEvent>
<PostBuildEvent>
<Message>Copy Release DLL to output directory</Message>
</PostBuildEvent>
</ItemDefinitionGroup>
<ItemGroup>
<ProjectReference Include="..\raylib\raylib.vcxproj">
<Project>{e89d61ac-55de-4482-afd4-df7242ebc859}</Project>
</ProjectReference>
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\..\..\examples\models\models_magicavoxel_loading.c" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
<ImportGroup Label="ExtensionTargets">
</ImportGroup>
</Project>

19
projects/VS2019/raylib.sln
View File

@ -275,6 +275,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "rlgl_standalone", "examples
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "core_split_screen", "examples\core_split_screen.vcxproj", "{946A1700-C7AA-46F0-AEF2-67C98B5722AC}"
EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "models_mesh_magicavoxel_loading", "examples\models_mesh_magicavoxel_loading.vcxproj", "{2F1B955B-275E-4D8E-8864-06FEC44D7912}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug.DLL|x64 = Debug.DLL|x64
@ -2283,6 +2285,22 @@ Global
{946A1700-C7AA-46F0-AEF2-67C98B5722AC}.Release|x64.Build.0 = Release|x64
{946A1700-C7AA-46F0-AEF2-67C98B5722AC}.Release|x86.ActiveCfg = Release|Win32
{946A1700-C7AA-46F0-AEF2-67C98B5722AC}.Release|x86.Build.0 = Release|Win32
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Debug.DLL|x64.ActiveCfg = Debug.DLL|x64
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Debug.DLL|x64.Build.0 = Debug.DLL|x64
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Debug.DLL|x86.ActiveCfg = Debug.DLL|Win32
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Debug.DLL|x86.Build.0 = Debug.DLL|Win32
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Debug|x64.ActiveCfg = Debug|x64
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Debug|x64.Build.0 = Debug|x64
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Debug|x86.ActiveCfg = Debug|Win32
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Debug|x86.Build.0 = Debug|Win32
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Release.DLL|x64.ActiveCfg = Release.DLL|x64
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Release.DLL|x64.Build.0 = Release.DLL|x64
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Release.DLL|x86.ActiveCfg = Release.DLL|Win32
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Release.DLL|x86.Build.0 = Release.DLL|Win32
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Release|x64.ActiveCfg = Release|x64
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Release|x64.Build.0 = Release|x64
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Release|x86.ActiveCfg = Release|Win32
{2F1B955B-275E-4D8E-8864-06FEC44D7912}.Release|x86.Build.0 = Release|Win32
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
@ -2422,6 +2440,7 @@ Global
{6237BEDE-BAAA-4A06-9C5E-8089BAA14C8B} = {E9D708A5-9C1F-4B84-A795-C5F191801762}
{C8765523-58F8-4C8E-9914-693396F6F0FF} = {E9D708A5-9C1F-4B84-A795-C5F191801762}
{946A1700-C7AA-46F0-AEF2-67C98B5722AC} = {6C82BAAE-BDDF-457D-8FA8-7E2490B07035}
{2F1B955B-275E-4D8E-8864-06FEC44D7912} = {AF5BEC5C-1F2B-4DA8-B12D-D09FE569237C}
EndGlobalSection
GlobalSection(ExtensibilityGlobals) = postSolution
SolutionGuid = {E926C768-6307-4423-A1EC-57E95B1FAB29}

1
src/config.h
View File

@ -182,6 +182,7 @@
#define SUPPORT_FILEFORMAT_MTL 1
#define SUPPORT_FILEFORMAT_IQM 1
#define SUPPORT_FILEFORMAT_GLTF 1
#define SUPPORT_FILEFORMAT_VOX 1
// Support procedural mesh generation functions, uses external par_shapes.h library
// NOTE: Some generated meshes DO NOT include generated texture coordinates
#define SUPPORT_MESH_GENERATION 1

771
src/external/vox_loader.h vendored Normal file
View File

@ -0,0 +1,771 @@
/*
The MIT License (MIT)
Copyright (c) 2021 Johann Nadalutti.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
vox_loader - v1.00
no warranty implied; use at your own risk
Do this:
#define VOX_LOADER_INCLUDE__H
before you include this file in* one* C or C++ file to create the implementation.
// i.e. it should look like this:
#include ...
#include ...
#include ...
#define VOX_LOADER_INCLUDE__H
#include "magicavoxel_loader.h"
revision history:
1.00 (2021-09-03) first released version
*/
#ifndef VOX_LOADER_H
#define VOX_LOADER_H
#include <string.h>
#ifdef __cplusplus
extern "C" {
#endif
#define VOX_SUCCESS (0)
#define VOX_ERROR_FILE_NOT_FOUND (-1)
#define VOX_ERROR_INVALID_FORMAT (-2)
#define VOX_ERROR_FILE_VERSION_TOO_OLD (-3)
typedef struct
{
int* array;
int used, size;
} ArrayInt;
typedef struct
{
Vector3* array;
int used, size;
} ArrayVector3;
typedef struct
{
Color* array;
int used, size;
} ArrayColor;
typedef struct
{
unsigned short* array;
int used, size;
} ArrayUShort;
// A chunk that contain voxels
typedef struct
{
unsigned char* m_array; //If Sparse != null
int arraySize; //Size for m_array in bytes (DEBUG ONLY)
} CubeChunk3D;
// Array for voxels
// Array is divised into chunks of CHUNKSIZE*CHUNKSIZE*CHUNKSIZE voxels size
typedef struct
{
//Array size in voxels
int sizeX;
int sizeY;
int sizeZ;
//Chunks size into array (array is divised into chunks)
int chunksSizeX;
int chunksSizeY;
int chunksSizeZ;
//Chunks array
CubeChunk3D* m_arrayChunks;
int arrayChunksSize; //Size for m_arrayChunks in bytes (DEBUG ONLY)
int ChunkFlattenOffset;
int chunksAllocated;
int chunksTotal;
//Arrays for mesh build
ArrayVector3 vertices;
ArrayUShort indices;
ArrayColor colors;
//Palette for voxels
Color palette[256];
} VoxArray3D;
// Functions
extern int Vox_LoadFileName(const char* pszfileName, VoxArray3D* voxarray);
extern void Vox_FreeArrays(VoxArray3D* voxarray);
#ifdef __cplusplus
}
#endif
//// end header file /////////////////////////////////////////////////////
#endif // VOX_LOADER_H
/////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////
// Implementation
/////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////
#ifdef VOX_LOADER_IMPLEMENTATION
/////////////////////////////////////////////////////////////////////////////////////////////
// ArrayInt helper
/////////////////////////////////////////////////////////////////////////////////////////////
void initArrayInt(ArrayInt* a, int initialSize)
{
a->array = MemAlloc(initialSize * sizeof(int));
a->used = 0;
a->size = initialSize;
}
void insertArrayInt(ArrayInt* a, int element)
{
if (a->used == a->size)
{
a->size *= 2;
a->array = MemRealloc(a->array, a->size * sizeof(int));
}
a->array[a->used++] = element;
}
void freeArrayInt(ArrayInt* a)
{
MemFree(a->array);
a->array = NULL;
a->used = a->size = 0;
}
/////////////////////////////////////////////////////////////////////////////////////////////
// ArrayUShort helper
/////////////////////////////////////////////////////////////////////////////////////////////
void initArrayUShort(ArrayUShort* a, int initialSize)
{
a->array = MemAlloc(initialSize * sizeof(unsigned short));
a->used = 0;
a->size = initialSize;
}
void insertArrayUShort(ArrayUShort* a, unsigned short element)
{
if (a->used == a->size)
{
a->size *= 2;
a->array = MemRealloc(a->array, a->size * sizeof(unsigned short));
}
a->array[a->used++] = element;
}
void freeArrayUShort(ArrayUShort* a)
{
MemFree(a->array);
a->array = NULL;
a->used = a->size = 0;
}
/////////////////////////////////////////////////////////////////////////////////////////////
// ArrayVector3 helper
/////////////////////////////////////////////////////////////////////////////////////////////
void initArrayVector3(ArrayVector3* a, int initialSize)
{
a->array = MemAlloc(initialSize * sizeof(Vector3));
a->used = 0;
a->size = initialSize;
}
void insertArrayVector3(ArrayVector3* a, Vector3 element)
{
if (a->used == a->size)
{
a->size *= 2;
a->array = MemRealloc(a->array, a->size * sizeof(Vector3));
}
a->array[a->used++] = element;
}
void freeArrayVector3(ArrayVector3* a)
{
MemFree(a->array);
a->array = NULL;
a->used = a->size = 0;
}
/////////////////////////////////////////////////////////////////////////////////////////////
// ArrayColor helper
/////////////////////////////////////////////////////////////////////////////////////////////
void initArrayColor(ArrayColor* a, int initialSize)
{
a->array = MemAlloc(initialSize * sizeof(Color));
a->used = 0;
a->size = initialSize;
}
void insertArrayColor(ArrayColor* a, Color element)
{
if (a->used == a->size)
{
a->size *= 2;
a->array = MemRealloc(a->array, a->size * sizeof(Color));
}
a->array[a->used++] = element;
}
void freeArrayColor(ArrayColor* a)
{
MemFree(a->array);
a->array = NULL;
a->used = a->size = 0;
}
/////////////////////////////////////////////////////////////////////////////////////////////
// Vox Loader
/////////////////////////////////////////////////////////////////////////////////////////////
#define CHUNKSIZE 16 // chunk size (CHUNKSIZE*CHUNKSIZE*CHUNKSIZE) in voxels
#define CHUNKSIZE_OPSHIFT 4 // 1<<4=16 -> Warning depend of CHUNKSIZE
#define CHUNK_FLATTENOFFSET_OPSHIFT 8 //Warning depend of CHUNKSIZE
//
// used right handed system and CCW face
//
// indexes for voxelcoords, per face orientation
//
//# Y
//# |
//# o----X
//# /
//# Z 2------------3
//# /| /|
//# 6------------7 |
//# | | | |
//# |0 ----------|- 1
//# |/ |/
//# 4------------5
//
// CCW
const int fv[6][4] = {
{0, 2, 6, 4 }, //-X
{5, 7, 3, 1 }, //+X
{0, 4, 5, 1 }, //-y
{6, 2, 3, 7 }, //+y
{1, 3, 2, 0 }, //-Z
{4, 6, 7, 5 } };//+Z
const Vector3 SolidVertex[] = {
{0, 0, 0}, //0
{1, 0, 0}, //1
{0, 1, 0}, //2
{1, 1, 0}, //3
{0, 0, 1}, //4
{1, 0, 1}, //5
{0, 1, 1}, //6
{1, 1, 1} }; //7
// Allocated VoxArray3D size
void Vox_AllocArray(VoxArray3D* voxarray, int _sx, int _sy, int _sz)
{
int sx = _sx + ((CHUNKSIZE - (_sx % CHUNKSIZE)) % CHUNKSIZE);
int sy = _sy + ((CHUNKSIZE - (_sy % CHUNKSIZE)) % CHUNKSIZE);
int sz = _sz + ((CHUNKSIZE - (_sz % CHUNKSIZE)) % CHUNKSIZE);
int chx = sx >> CHUNKSIZE_OPSHIFT; //Chunks Count in X
int chy = sy >> CHUNKSIZE_OPSHIFT; //Chunks Count in Y
int chz = sz >> CHUNKSIZE_OPSHIFT; //Chunks Count in Z
//VoxArray3D* parray = (VoxArray3D*)MemAlloc(sizeof(VoxArray3D));
voxarray->sizeX = sx;
voxarray->sizeY = sy;
voxarray->sizeZ = sz;
voxarray->chunksSizeX = chx;
voxarray->chunksSizeY = chy;
voxarray->chunksSizeZ = chz;
voxarray->ChunkFlattenOffset = (chy * chz); //m_arrayChunks[(x * (sy*sz)) + (z * sy) + y]
//Alloc chunks array
int size = sizeof(CubeChunk3D) * chx * chy * chz;
voxarray->m_arrayChunks = MemAlloc(size);
voxarray->arrayChunksSize = size;
//Init chunks array
size = chx * chy * chz;
voxarray->chunksTotal = size;
voxarray->chunksAllocated = 0;
for (int i = 0; i < size; i++)
{
voxarray->m_arrayChunks[i].m_array = 0;
voxarray->m_arrayChunks[i].arraySize = 0;
}
return voxarray;
}
// Set voxel ID from its position into VoxArray3D
void Vox_SetVoxel(VoxArray3D* voxarray, int x, int y, int z, unsigned char id)
{
//Get chunk from array pos
int chX = x >> CHUNKSIZE_OPSHIFT; //x / CHUNKSIZE;
int chY = y >> CHUNKSIZE_OPSHIFT; //y / CHUNKSIZE;
int chZ = z >> CHUNKSIZE_OPSHIFT; //z / CHUNKSIZE;
int offset = (chX * voxarray->ChunkFlattenOffset) + (chZ * voxarray->chunksSizeY) + chY;
//if (offset > voxarray->arrayChunksSize)
//{
// TraceLog(LOG_ERROR, "Out of array");
//}
CubeChunk3D* chunk = &voxarray->m_arrayChunks[offset];
//Set Chunk
chX = x - (chX << CHUNKSIZE_OPSHIFT); //x - (bx * CHUNKSIZE);
chY = y - (chY << CHUNKSIZE_OPSHIFT); //y - (by * CHUNKSIZE);
chZ = z - (chZ << CHUNKSIZE_OPSHIFT); //z - (bz * CHUNKSIZE);
if (chunk->m_array == 0)
{
int size = CHUNKSIZE * CHUNKSIZE * CHUNKSIZE;
chunk->m_array = MemAlloc(size);
chunk->arraySize = size;
//memset(chunk->m_array, 0, size);
voxarray->chunksAllocated++;
}
offset = (chX << CHUNK_FLATTENOFFSET_OPSHIFT) + (chZ << CHUNKSIZE_OPSHIFT) + chY;
//if (offset > chunk->arraySize)
//{
// TraceLog(LOG_ERROR, "Out of array");
//}
chunk->m_array[offset] = id;
}
// Get voxel ID from its position into VoxArray3D
unsigned char Vox_GetVoxel(VoxArray3D* voxarray, int x, int y, int z)
{
if (x < 0 || y < 0 || z < 0)
return 0;
if (x >= voxarray->sizeX || y >= voxarray->sizeY || z >= voxarray->sizeZ)
return 0;
//Get chunk from array pos
int chX = x >> CHUNKSIZE_OPSHIFT; //x / CHUNKSIZE;
int chY = y >> CHUNKSIZE_OPSHIFT; //y / CHUNKSIZE;
int chZ = z >> CHUNKSIZE_OPSHIFT; //z / CHUNKSIZE;
int offset = (chX * voxarray->ChunkFlattenOffset) + (chZ * voxarray->chunksSizeY) + chY;
//if (offset > voxarray->arrayChunksSize)
//{
// TraceLog(LOG_ERROR, "Out of array");
//}
CubeChunk3D* chunk = &voxarray->m_arrayChunks[offset];
//Set Chunk
chX = x - (chX << CHUNKSIZE_OPSHIFT); //x - (bx * CHUNKSIZE);
chY = y - (chY << CHUNKSIZE_OPSHIFT); //y - (by * CHUNKSIZE);
chZ = z - (chZ << CHUNKSIZE_OPSHIFT); //z - (bz * CHUNKSIZE);
if (chunk->m_array == 0)
{
return 0;
}
offset = (chX << CHUNK_FLATTENOFFSET_OPSHIFT) + (chZ << CHUNKSIZE_OPSHIFT) + chY;
//if (offset > chunk->arraySize)
//{
// TraceLog(LOG_ERROR, "Out of array");
//}
return chunk->m_array[offset];
}
// Calc visibles faces from a voxel position
unsigned char Vox_CalcFacesVisible(VoxArray3D* pvoxArray, int cx, int cy, int cz)
{
unsigned char idXm1 = Vox_GetVoxel(pvoxArray, cx - 1, cy, cz);
unsigned char idXp1 = Vox_GetVoxel(pvoxArray, cx + 1, cy, cz);
unsigned char idYm1 = Vox_GetVoxel(pvoxArray, cx, cy - 1, cz);
unsigned char idYp1 = Vox_GetVoxel(pvoxArray, cx, cy + 1, cz);
unsigned char idZm1 = Vox_GetVoxel(pvoxArray, cx, cy, cz - 1);
unsigned char idZp1 = Vox_GetVoxel(pvoxArray, cx, cy, cz + 1);
unsigned char byVFMask = 0;
//#-x
if (idXm1 == 0)
byVFMask |= (1 << 0);
//#+x
if (idXp1 == 0)
byVFMask |= (1 << 1);
//#-y
if (idYm1 == 0)
byVFMask |= (1 << 2);
//#+y
if (idYp1 == 0)
byVFMask |= (1 << 3);
//#-z
if (idZm1 == 0)
byVFMask |= (1 << 4);
//#+z
if (idZp1 == 0)
byVFMask |= (1 << 5);
return byVFMask;
}
// Get a vertex position from a voxel's corner
Vector3 Vox_GetVertexPosition(int _wcx, int _wcy, int _wcz, int _nNumVertex)
{
float scale = 0.25;
Vector3 vtx = SolidVertex[_nNumVertex];
vtx.x = (vtx.x + _wcx) * scale;
vtx.y = (vtx.y + _wcy) * scale;
vtx.z = (vtx.z + _wcz) * scale;
return vtx;
}
// Build a voxel vertices/colors/indices
void Vox_Build_Voxel(VoxArray3D* pvoxArray, int x, int y, int z, int matID)
{
unsigned char byVFMask = Vox_CalcFacesVisible(pvoxArray, x, y, z);
if (byVFMask == 0)
return;
int i, j;
Vector3 vertComputed[8];
int bVertexComputed[8];
memset(vertComputed, 0, sizeof(vertComputed));
memset(bVertexComputed, 0, sizeof(bVertexComputed));
//For each Cube's faces
for (i = 0; i < 6; i++) // 6 faces
{
if ((byVFMask & (1 << i)) != 0) //If face is visible
{
for (j = 0; j < 4; j++) // 4 corners
{
int nNumVertex = fv[i][j]; //Face,Corner
if (bVertexComputed[nNumVertex] == 0) //if never calc
{
bVertexComputed[nNumVertex] = 1;
vertComputed[nNumVertex] = Vox_GetVertexPosition(x, y, z, nNumVertex);
}
}
}
}
//Add face
for (i = 0; i < 6; i++)// 6 faces
{
if ((byVFMask & (1 << i)) == 0)
continue; //Face invisible
int v0 = fv[i][0]; //Face, Corner
int v1 = fv[i][1]; //Face, Corner
int v2 = fv[i][2]; //Face, Corner
int v3 = fv[i][3]; //Face, Corner
//Arrays
int idx = pvoxArray->vertices.used;
insertArrayVector3(&pvoxArray->vertices, vertComputed[v0]);
insertArrayVector3(&pvoxArray->vertices, vertComputed[v1]);
insertArrayVector3(&pvoxArray->vertices, vertComputed[v2]);
insertArrayVector3(&pvoxArray->vertices, vertComputed[v3]);
Color col = pvoxArray->palette[matID];
insertArrayColor(&pvoxArray->colors, col);
insertArrayColor(&pvoxArray->colors, col);
insertArrayColor(&pvoxArray->colors, col);
insertArrayColor(&pvoxArray->colors, col);
//v0 - v1 - v2, v0 - v2 - v3
insertArrayUShort(&pvoxArray->indices, idx + 0);
insertArrayUShort(&pvoxArray->indices, idx + 2);
insertArrayUShort(&pvoxArray->indices, idx + 1);
insertArrayUShort(&pvoxArray->indices, idx + 0);
insertArrayUShort(&pvoxArray->indices, idx + 3);
insertArrayUShort(&pvoxArray->indices, idx + 2);
}
}
// MagicaVoxel *.vox file format Loader
int Vox_LoadFileName(const char* pszfileName, VoxArray3D* voxarray)
{
//////////////////////////////////////////////////
//Read VOX file
//4 bytes: magic number ('V' 'O' 'X' 'space' )
//4 bytes: version number (current version is 150 )
unsigned long signature;
unsigned long readed = 0;
unsigned char* fileData;
fileData = LoadFileData(pszfileName, &readed);
if (fileData == 0)
{
return VOX_ERROR_FILE_NOT_FOUND;
}
unsigned char* fileDataPtr = fileData;
unsigned char* endfileDataPtr = fileData + readed;
signature = *((unsigned long*)fileDataPtr);
fileDataPtr += sizeof(unsigned long);
if (signature != 0x20584F56) //56 4F 58 20
{
//TraceLog(LOG_ERROR, "Not an MagicaVoxel File format");
return VOX_ERROR_INVALID_FORMAT;
}
unsigned long version;
version = *((unsigned long*)fileDataPtr);
fileDataPtr += sizeof(unsigned long);
if (version < 150)
{
//TraceLog(LOG_ERROR, "MagicaVoxel version too old");
return VOX_ERROR_FILE_VERSION_TOO_OLD;
}
// header
//4 bytes: chunk id
//4 bytes: size of chunk contents (n)
//4 bytes: total size of children chunks(m)
//// chunk content
//n bytes: chunk contents
//// children chunks : m bytes
//{ child chunk 0 }
//{ child chunk 1 }
unsigned long sizeX, sizeY, sizeZ;
sizeX = sizeY = sizeZ = 0;
unsigned long numVoxels = 0;
int offsetX, offsetY, offsetZ;
offsetX = offsetY = offsetZ = 0;
while (fileDataPtr < endfileDataPtr)
{
char szChunkName[5];
memcpy(szChunkName, fileDataPtr, 4);
szChunkName[4] = 0;
fileDataPtr += 4;
unsigned long chunkSize = *((unsigned long*)fileDataPtr);
fileDataPtr += sizeof(unsigned long);
unsigned long chunkTotalChildSize = *((unsigned long*)fileDataPtr);
fileDataPtr += sizeof(unsigned long);
if (strcmp(szChunkName, "SIZE") == 0)
{
//(4 bytes x 3 : x, y, z )
sizeX = *((unsigned long*)fileDataPtr);
fileDataPtr += sizeof(unsigned long);
sizeY = *((unsigned long*)fileDataPtr);
fileDataPtr += sizeof(unsigned long);
sizeZ = *((unsigned long*)fileDataPtr);
fileDataPtr += sizeof(unsigned long);
//Alloc vox array
Vox_AllocArray(voxarray, sizeX, sizeY, sizeZ);
}
else if (strcmp(szChunkName, "XYZI") == 0)
{
unsigned char vx, vy, vz, vi;
//(numVoxels : 4 bytes )
//(each voxel: 1 byte x 4 : x, y, z, colorIndex ) x numVoxels
numVoxels = *((unsigned long*)fileDataPtr);
fileDataPtr += sizeof(unsigned long);
while (numVoxels > 0)
{
vx = *((unsigned char*)fileDataPtr++);
vy = *((unsigned char*)fileDataPtr++);
vz = *((unsigned char*)fileDataPtr++);
vi = *((unsigned char*)fileDataPtr++);
Vox_SetVoxel(voxarray, vx, vy, vz, vi);
numVoxels--;
}
}
else if (strcmp(szChunkName, "RGBA") == 0)
{
Color col;
//(each pixel: 1 byte x 4 : r, g, b, a ) x 256
for (int i = 0; i < 256 - 1; i++)
{
col.r = *((unsigned char*)fileDataPtr++);
col.g = *((unsigned char*)fileDataPtr++);
col.b = *((unsigned char*)fileDataPtr++);
col.a = *((unsigned char*)fileDataPtr++);
voxarray->palette[i + 1] = col;
}
}
else
{
fileDataPtr += chunkSize;
}
}
//TraceLog(LOG_INFO, TextFormat("Vox Size : %dx%dx%d", sizeX, sizeY, sizeZ));
//TraceLog(LOG_INFO, TextFormat("Vox Chunks Count : %d/%d", pvoxArray->chunksAllocated, pvoxArray->chunksTotal));
//////////////////////////////////////////////////////////
// Building Mesh
// TODO compute globals indices array
//TraceLog(LOG_INFO, TextFormat("Building VOX Mesh : %s", pszfileName));
// Init Arrays
initArrayVector3(&voxarray->vertices, 3 * 1024);
initArrayUShort(&voxarray->indices, 3 * 1024);
initArrayColor(&voxarray->colors, 3 * 1024);
// Create vertices and indices buffers
int x, y, z;
for (x = 0; x <= voxarray->sizeX; x++)
{
for (z = 0; z <= voxarray->sizeZ; z++)
{
for (y = 0; y <= voxarray->sizeY; y++)
{
unsigned char matID = Vox_GetVoxel(voxarray, x, y, z);
if (matID != 0)
Vox_Build_Voxel(voxarray, x, y, z, matID);
}
}
}
return VOX_SUCCESS;
}
void Vox_FreeArrays(VoxArray3D* voxarray)
{
//Free chunks
if (voxarray->m_arrayChunks != 0)
{
for (int i = 0; i < voxarray->chunksTotal; i++)
{
CubeChunk3D* chunk = &voxarray->m_arrayChunks[i];
if (chunk->m_array != 0)
{
chunk->arraySize = 0;
MemFree(chunk->m_array);
}
}
MemFree(voxarray->m_arrayChunks);
voxarray->m_arrayChunks = 0;
voxarray->arrayChunksSize = 0;
voxarray->chunksSizeX = voxarray->chunksSizeY = voxarray->chunksSizeZ = 0;
voxarray->chunksTotal = 0;
voxarray->chunksAllocated = 0;
voxarray->ChunkFlattenOffset = 0;
voxarray->sizeX = voxarray->sizeY = voxarray->sizeZ = 0;
}
//Free arrays
freeArrayVector3(&voxarray->vertices);
freeArrayUShort(&voxarray->indices);
freeArrayColor(&voxarray->colors);
}
#endif //VOX_LOADER_IMPLEMENTATION

110
src/models.c
View File

@ -8,6 +8,8 @@
* #define SUPPORT_FILEFORMAT_MTL
* #define SUPPORT_FILEFORMAT_IQM
* #define SUPPORT_FILEFORMAT_GLTF
* #define SUPPORT_FILEFORMAT_VOX
*
* Selected desired fileformats to be supported for model data loading.
*
* #define SUPPORT_MESH_GENERATION
@ -71,6 +73,11 @@
#include "external/stb_image.h" // glTF texture images loading
#endif
#if defined(SUPPORT_FILEFORMAT_VOX)
#define VOX_LOADER_IMPLEMENTATION
#include "external/vox_loader.h" // vox file format loading
#endif
#if defined(SUPPORT_MESH_GENERATION)
#define PAR_MALLOC(T, N) ((T*)RL_MALLOC(N*sizeof(T)))
#define PAR_CALLOC(T, N) ((T*)RL_CALLOC(N*sizeof(T), 1))
@ -131,6 +138,9 @@ static void GetGLTFPrimitiveCount(cgltf_node *node, int *outCount);
static bool ReadGLTFValue(cgltf_accessor *acc, unsigned int index, void *variable);
static void *ReadGLTFValuesAs(cgltf_accessor *acc, cgltf_component_type type, bool adjustOnDownCasting);
#endif
#if defined(SUPPORT_FILEFORMAT_VOX)
static Model LoadVOX(const char* filename); //Load VOX mesh data
#endif
//----------------------------------------------------------------------------------
// Module Functions Definition
@ -718,6 +728,9 @@ Model LoadModel(const char *fileName)
#if defined(SUPPORT_FILEFORMAT_GLTF)
if (IsFileExtension(fileName, ".gltf;.glb")) model = LoadGLTF(fileName);
#endif
#if defined(SUPPORT_FILEFORMAT_VOX)
if (IsFileExtension(fileName, ".vox")) model = LoadVOX(fileName);
#endif
// Make sure model transform is set to identity matrix!
model.transform = MatrixIdentity();
@ -5469,3 +5482,100 @@ static void GetGLTFPrimitiveCount(cgltf_node *node, int *outCount)
}
#endif
#if defined(SUPPORT_FILEFORMAT_VOX)
// Load OBJ mesh data
static Model LoadVOX(const char* fileName)
{
Model model = { 0 };
int nbvertices = 0;
int meshescount = 0;
//////////////////////////////////
// Load MagicaVoxel fileformat
VoxArray3D voxarray;
int ret = Vox_LoadFileName(fileName, &voxarray);
if (ret != VOX_SUCCESS)
{
TRACELOG(LOG_WARNING, "MODEL: [%s] Failed to load VOX data", fileName);
return model;
}
else
{
// Compute meshes count
nbvertices = voxarray.vertices.used;
meshescount = 1 + (nbvertices / 65536);
TRACELOG(LOG_INFO, "MODEL: [%s] VOX data loaded successfully : %i vertices/%i meshes", fileName, nbvertices, meshescount);
}
//////////////////////////////////
// Build model
// Build Models from meshes
model.transform = MatrixIdentity();
model.meshCount = meshescount;
model.meshes = (Mesh*)MemAlloc(model.meshCount * sizeof(Mesh));
model.meshMaterial = (int*)MemAlloc(model.meshCount * sizeof(int));
model.materialCount = 1;
model.materials = (Material*)MemAlloc(model.materialCount * sizeof(Material));
model.materials[0] = LoadMaterialDefault();
// Init model's meshes
int verticesRemain = voxarray.vertices.used;
int verticesMax = 65532; //5461 voxels x 12 vertices per voxel -> 65532 (must be inf 65536)
Vector3* pvertices = voxarray.vertices.array; //6*4=12 vertices per voxel
Color* pcolors = voxarray.colors.array;
unsigned short* pindices = voxarray.indices.array; //5461 * 6 * 6 -> 196596 indices max per mesh
int size;
for (int idxMesh = 0; idxMesh < meshescount; idxMesh++)
{
Mesh* pmesh = &model.meshes[idxMesh];
memset(pmesh, 0, sizeof(Mesh));
// Copy Vertices
pmesh->vertexCount = (int)fmin(verticesMax, verticesRemain);
size = pmesh->vertexCount * sizeof(float) * 3;
pmesh->vertices = MemAlloc(size);
memcpy(pmesh->vertices, pvertices, size);
//Copy Indices TODO compute globals indices array
size = voxarray.indices.used * sizeof(unsigned short);
pmesh->indices = MemAlloc(size);
memcpy(pmesh->indices, pindices, size);
pmesh->triangleCount = (pmesh->vertexCount / 4) * 2;
// Copy Colors
size = pmesh->vertexCount * sizeof(Color);
pmesh->colors = MemAlloc(size);
memcpy(pmesh->colors, pcolors, size);
// First material index
model.meshMaterial[idxMesh] = 0;
// Build GPU mesh
UploadMesh(pmesh, false);
//Next
verticesRemain -= verticesMax;
pvertices += verticesMax;
pcolors += verticesMax;
}
//Free arrays
Vox_FreeArrays(&voxarray);
return model;
}
#endif