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REVIEWED: Vox loader

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Ray 2021-09-10 15:37:31 +02:00
parent a422d2fc8b
commit 352ea80a1f
2 changed files with 127 additions and 167 deletions
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277
src/external/vox_loader.h vendored
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@ -41,116 +41,116 @@ revision history:
1.01 (2021-09-07) Support custom memory allocators
Removed Raylib dependencies
Changed Vox_LoadFileName to Vox_LoadFromMemory
1.02 (2021-09-10) @raysan5: Reviewed some formating
*/
#ifndef VOX_LOADER_H
#define VOX_LOADER_H
#include <string.h>
#include <stdlib.h>
#ifdef __cplusplus
extern "C" {
// Allow custom memory allocators
#ifndef VOX_MALLOC
#define VOX_MALLOC RL_MALLOC
#endif
#ifndef VOX_CALLOC
#define VOX_CALLOC RL_CALLOC
#endif
#ifndef VOX_REALLOC
#define VOX_REALLOC RL_REALLOC
#endif
#ifndef VOX_FREE
#define VOX_FREE RL_FREE
#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)
#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)
// VoxColor, 4 components, R8G8B8A8 (32bit)
typedef struct {
unsigned char r, g, b, a;
} VoxColor;
// VoxColor, 4 components, R8G8B8A8 (32bit)
typedef struct {
unsigned char r, g, b, a;
} VoxColor;
// VoxVector3, 3 components
typedef struct {
float x, y, z;
} VoxVector3;
// VoxVector3, 3 components
typedef struct {
float x, y, z;
} VoxVector3;
typedef struct {
int* array;
int used, size;
} ArrayInt;
typedef struct
{
int* array;
int used, size;
} ArrayInt;
typedef struct {
VoxVector3* array;
int used, size;
} ArrayVector3;
typedef struct
{
VoxVector3* array;
int used, size;
} ArrayVector3;
typedef struct {
VoxColor* array;
int used, size;
} ArrayColor;
typedef struct
{
VoxColor* array;
int used, size;
} ArrayColor;
typedef struct {
unsigned short* array;
int used, size;
} ArrayUShort;
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;
// 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;
// Chunks size into array (array is divised into chunks)
int chunksSizeX;
int chunksSizeY;
int chunksSizeZ;
// 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 array
CubeChunk3D* m_arrayChunks;
int arrayChunksSize; // Size for m_arrayChunks in bytes (DEBUG ONLY)
//Chunks size into array (array is divised into chunks)
int chunksSizeX;
int chunksSizeY;
int chunksSizeZ;
int ChunkFlattenOffset;
int chunksAllocated;
int chunksTotal;
//Chunks array
CubeChunk3D* m_arrayChunks;
int arrayChunksSize; //Size for m_arrayChunks in bytes (DEBUG ONLY)
// Arrays for mesh build
ArrayVector3 vertices;
ArrayUShort indices;
ArrayColor colors;
int ChunkFlattenOffset;
int chunksAllocated;
int chunksTotal;
//Palette for voxels
VoxColor palette[256];
//Arrays for mesh build
ArrayVector3 vertices;
ArrayUShort indices;
ArrayColor colors;
} VoxArray3D;
//Palette for voxels
VoxColor palette[256];
} VoxArray3D;
// Functions
extern int Vox_LoadFromMemory(const unsigned char* pvoxData, unsigned int voxDataSize, VoxArray3D* pvoxarray);
extern void Vox_FreeArrays(VoxArray3D* voxarray);
#if defined(__cplusplus)
extern "C" { // Prevents name mangling of functions
#endif
// Functions
int Vox_LoadFromMemory(const unsigned char* pvoxData, unsigned int voxDataSize, VoxArray3D* pvoxarray);
void Vox_FreeArrays(VoxArray3D* voxarray);
#ifdef __cplusplus
}
#endif
//// end header file /////////////////////////////////////////////////////
#endif // VOX_LOADER_H
//// end header file /////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////
@ -161,30 +161,29 @@ extern "C" {
#ifdef VOX_LOADER_IMPLEMENTATION
/////////////////////////////////////////////////////////////////////////////////////////////
// ArrayInt helper
/////////////////////////////////////////////////////////////////////////////////////////////
void initArrayInt(ArrayInt* a, int initialSize)
static void initArrayInt(ArrayInt* a, int initialSize)
{
a->array = VOX_MALLOC(initialSize * sizeof(int));
a->used = 0;
a->size = initialSize;
}
void insertArrayInt(ArrayInt* a, int element)
static void insertArrayInt(ArrayInt* a, int element)
{
if (a->used == a->size)
{
a->size *= 2;
a->array = VOX_REALLOC(a->array, a->size * sizeof(int));
}
a->array[a->used++] = element;
}
void freeArrayInt(ArrayInt* a)
static void freeArrayInt(ArrayInt* a)
{
VOX_FREE(a->array);
a->array = NULL;
@ -195,14 +194,14 @@ void freeArrayInt(ArrayInt* a)
// ArrayUShort helper
/////////////////////////////////////////////////////////////////////////////////////////////
void initArrayUShort(ArrayUShort* a, int initialSize)
static void initArrayUShort(ArrayUShort* a, int initialSize)
{
a->array = VOX_MALLOC(initialSize * sizeof(unsigned short));
a->used = 0;
a->size = initialSize;
}
void insertArrayUShort(ArrayUShort* a, unsigned short element)
static void insertArrayUShort(ArrayUShort* a, unsigned short element)
{
if (a->used == a->size)
{
@ -212,7 +211,7 @@ void insertArrayUShort(ArrayUShort* a, unsigned short element)
a->array[a->used++] = element;
}
void freeArrayUShort(ArrayUShort* a)
static void freeArrayUShort(ArrayUShort* a)
{
VOX_FREE(a->array);
a->array = NULL;
@ -224,14 +223,14 @@ void freeArrayUShort(ArrayUShort* a)
// ArrayVector3 helper
/////////////////////////////////////////////////////////////////////////////////////////////
void initArrayVector3(ArrayVector3* a, int initialSize)
static void initArrayVector3(ArrayVector3* a, int initialSize)
{
a->array = VOX_MALLOC(initialSize * sizeof(VoxVector3));
a->used = 0;
a->size = initialSize;
}
void insertArrayVector3(ArrayVector3* a, VoxVector3 element)
static void insertArrayVector3(ArrayVector3* a, VoxVector3 element)
{
if (a->used == a->size)
{
@ -241,7 +240,7 @@ void insertArrayVector3(ArrayVector3* a, VoxVector3 element)
a->array[a->used++] = element;
}
void freeArrayVector3(ArrayVector3* a)
static void freeArrayVector3(ArrayVector3* a)
{
VOX_FREE(a->array);
a->array = NULL;
@ -252,14 +251,14 @@ void freeArrayVector3(ArrayVector3* a)
// ArrayColor helper
/////////////////////////////////////////////////////////////////////////////////////////////
void initArrayColor(ArrayColor* a, int initialSize)
static void initArrayColor(ArrayColor* a, int initialSize)
{
a->array = VOX_MALLOC(initialSize * sizeof(VoxColor));
a->used = 0;
a->size = initialSize;
}
void insertArrayColor(ArrayColor* a, VoxColor element)
static void insertArrayColor(ArrayColor* a, VoxColor element)
{
if (a->used == a->size)
{
@ -269,7 +268,7 @@ void insertArrayColor(ArrayColor* a, VoxColor element)
a->array[a->used++] = element;
}
void freeArrayColor(ArrayColor* a)
static void freeArrayColor(ArrayColor* a)
{
VOX_FREE(a->array);
a->array = NULL;
@ -281,9 +280,9 @@ void freeArrayColor(ArrayColor* a)
// 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
#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
@ -311,8 +310,8 @@ const int fv[6][4] = {
{0, 4, 5, 1 }, //-y
{6, 2, 3, 7 }, //+y
{1, 3, 2, 0 }, //-Z
{4, 6, 7, 5 } };//+Z
{4, 6, 7, 5 } //+Z
};
const VoxVector3 SolidVertex[] = {
{0, 0, 0}, //0
@ -322,14 +321,11 @@ const VoxVector3 SolidVertex[] = {
{0, 0, 1}, //4
{1, 0, 1}, //5
{0, 1, 1}, //6
{1, 1, 1} }; //7
{1, 1, 1} //7
};
// Allocated VoxArray3D size
void Vox_AllocArray(VoxArray3D* pvoxarray, int _sx, int _sy, int _sz)
static void Vox_AllocArray(VoxArray3D* pvoxarray, int _sx, int _sy, int _sz)
{
int sx = _sx + ((CHUNKSIZE - (_sx % CHUNKSIZE)) % CHUNKSIZE);
int sy = _sy + ((CHUNKSIZE - (_sy % CHUNKSIZE)) % CHUNKSIZE);
@ -350,13 +346,12 @@ void Vox_AllocArray(VoxArray3D* pvoxarray, int _sx, int _sy, int _sz)
pvoxarray->ChunkFlattenOffset = (chy * chz); //m_arrayChunks[(x * (sy*sz)) + (z * sy) + y]
//Alloc chunks array
// Alloc chunks array
int size = sizeof(CubeChunk3D) * chx * chy * chz;
pvoxarray->m_arrayChunks = VOX_MALLOC(size);
pvoxarray->arrayChunksSize = size;
//Init chunks array
// Init chunks array
size = chx * chy * chz;
pvoxarray->chunksTotal = size;
pvoxarray->chunksAllocated = 0;
@ -369,9 +364,9 @@ void Vox_AllocArray(VoxArray3D* pvoxarray, int _sx, int _sy, int _sz)
}
// Set voxel ID from its position into VoxArray3D
void Vox_SetVoxel(VoxArray3D* pvoxarray, int x, int y, int z, unsigned char id)
static void Vox_SetVoxel(VoxArray3D* pvoxarray, int x, int y, int z, unsigned char id)
{
//Get chunk from array pos
// 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;
@ -384,7 +379,7 @@ void Vox_SetVoxel(VoxArray3D* pvoxarray, int x, int y, int z, unsigned char id)
CubeChunk3D* chunk = &pvoxarray->m_arrayChunks[offset];
//Set Chunk
// 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);
@ -407,20 +402,16 @@ void Vox_SetVoxel(VoxArray3D* pvoxarray, int x, int y, int z, unsigned char id)
//}
chunk->m_array[offset] = id;
}
// Get voxel ID from its position into VoxArray3D
unsigned char Vox_GetVoxel(VoxArray3D* pvoxarray, int x, int y, int z)
static unsigned char Vox_GetVoxel(VoxArray3D* pvoxarray, int x, int y, int z)
{
if (x < 0 || y < 0 || z < 0)
return 0;
if (x < 0 || y < 0 || z < 0) return 0;
if (x >= pvoxarray->sizeX || y >= pvoxarray->sizeY || z >= pvoxarray->sizeZ)
return 0;
if (x >= pvoxarray->sizeX || y >= pvoxarray->sizeY || z >= pvoxarray->sizeZ) return 0;
//Get chunk from array pos
// 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;
@ -433,7 +424,7 @@ unsigned char Vox_GetVoxel(VoxArray3D* pvoxarray, int x, int y, int z)
CubeChunk3D* chunk = &pvoxarray->m_arrayChunks[offset];
//Set Chunk
// 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);
@ -454,7 +445,7 @@ unsigned char Vox_GetVoxel(VoxArray3D* pvoxarray, int x, int y, int z)
}
// Calc visibles faces from a voxel position
unsigned char Vox_CalcFacesVisible(VoxArray3D* pvoxArray, int cx, int cy, int cz)
static 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);
@ -468,51 +459,45 @@ unsigned char Vox_CalcFacesVisible(VoxArray3D* pvoxArray, int cx, int cy, int cz
unsigned char byVFMask = 0;
//#-x
if (idXm1 == 0)
byVFMask |= (1 << 0);
if (idXm1 == 0) byVFMask |= (1 << 0);
//#+x
if (idXp1 == 0)
byVFMask |= (1 << 1);
if (idXp1 == 0) byVFMask |= (1 << 1);
//#-y
if (idYm1 == 0)
byVFMask |= (1 << 2);
if (idYm1 == 0) byVFMask |= (1 << 2);
//#+y
if (idYp1 == 0)
byVFMask |= (1 << 3);
if (idYp1 == 0) byVFMask |= (1 << 3);
//#-z
if (idZm1 == 0)
byVFMask |= (1 << 4);
if (idZm1 == 0) byVFMask |= (1 << 4);
//#+z
if (idZp1 == 0)
byVFMask |= (1 << 5);
if (idZp1 == 0) byVFMask |= (1 << 5);
return byVFMask;
}
// Get a vertex position from a voxel's corner
VoxVector3 Vox_GetVertexPosition(int _wcx, int _wcy, int _wcz, int _nNumVertex)
static VoxVector3 Vox_GetVertexPosition(int _wcx, int _wcy, int _wcz, int _nNumVertex)
{
float scale = 0.25;
VoxVector3 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)
static 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;
if (byVFMask == 0) return;
int i, j;
VoxVector3 vertComputed[8];
@ -520,7 +505,6 @@ void Vox_Build_Voxel(VoxArray3D* pvoxArray, int x, int y, int z, int matID)
memset(vertComputed, 0, sizeof(vertComputed));
memset(bVertexComputed, 0, sizeof(bVertexComputed));
//For each Cube's faces
for (i = 0; i < 6; i++) // 6 faces
{
@ -572,17 +556,12 @@ void Vox_Build_Voxel(VoxArray3D* pvoxArray, int x, int y, int z, int matID)
insertArrayUShort(&pvoxArray->indices, idx + 0);
insertArrayUShort(&pvoxArray->indices, idx + 3);
insertArrayUShort(&pvoxArray->indices, idx + 2);
}
}
// MagicaVoxel *.vox file format Loader
int Vox_LoadFromMemory(const unsigned char* pvoxData, unsigned int voxDataSize, VoxArray3D* pvoxarray)
{
//////////////////////////////////////////////////
//Read VOX file
//4 bytes: magic number ('V' 'O' 'X' 'space' )
@ -702,18 +681,10 @@ int Vox_LoadFromMemory(const unsigned char* pvoxData, unsigned int voxDataSize,
}
}
//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(&pvoxarray->vertices, 3 * 1024);
initArrayUShort(&pvoxarray->indices, 3 * 1024);
@ -735,14 +706,12 @@ int Vox_LoadFromMemory(const unsigned char* pvoxData, unsigned int voxDataSize,
}
}
return VOX_SUCCESS;
}
void Vox_FreeArrays(VoxArray3D* voxarray)
{
//Free chunks
// Free chunks
if (voxarray->m_arrayChunks != 0)
{
for (int i = 0; i < voxarray->chunksTotal; i++)
@ -766,7 +735,7 @@ void Vox_FreeArrays(VoxArray3D* voxarray)
voxarray->sizeX = voxarray->sizeY = voxarray->sizeZ = 0;
}
//Free arrays
// Free arrays
freeArrayVector3(&voxarray->vertices);
freeArrayUShort(&voxarray->indices);
freeArrayColor(&voxarray->colors);

17
src/models.c
View file

@ -74,19 +74,10 @@
#endif
#if defined(SUPPORT_FILEFORMAT_VOX)
// Allow custom memory allocators
#ifndef VOX_MALLOC
#define VOX_MALLOC RL_MALLOC
#endif
#ifndef VOX_CALLOC
#define VOX_CALLOC RL_CALLOC
#endif
#ifndef VOX_REALLOC
#define VOX_REALLOC RL_REALLOC
#endif
#ifndef VOX_FREE
#define VOX_FREE RL_FREE
#endif
#define VOX_MALLOC RL_MALLOC
#define VOX_CALLOC RL_CALLOC
#define VOX_REALLOC RL_REALLOC
#define VOX_FREE RL_FREE
#define VOX_LOADER_IMPLEMENTATION
#include "external/vox_loader.h" // vox file format loading (MagikaVoxel)