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efl/src/modules/evas/model_loaders/md2/evas_model_load_md2.c

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14 KiB
C
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#include "evas_common_private.h"
#include "evas_private.h"
#define PACKED __attribute__((__packed__))
#define MD2_MAGIC_NUMBER 844121161
#define MD2_VERSION 8
#define MD2_FRAME_SCALE 256
/* Structures for reading data from file. */
typedef struct _MD2_Header MD2_Header;
typedef struct _MD2_Vertex MD2_Vertex;
typedef struct _MD2_Frame MD2_Frame;
typedef struct _MD2_Triangle MD2_Triangle;
typedef struct _MD2_Texcoord MD2_Texcoord;
struct PACKED _MD2_Header
{
int magic;
int version;
int skin_width;
int skin_height;
int frame_size;
int skins_count;
int vertex_count;
int texcoord_count;
int triangle_count;
int glcmd_count;
int frame_count;
int offset_skins;
int offset_texcoords;
int offset_triangles;
int offset_frames;
int offset_glcmds;
int offset_end;
};
struct PACKED _MD2_Vertex
{
unsigned char pos[3];
unsigned char normal_idx;
};
struct PACKED _MD2_Frame
{
float scale[3];
float trans[3];
char name[16];
MD2_Vertex vertices[1];
};
struct PACKED _MD2_Triangle
{
unsigned short vertex_idx[3];
unsigned short texcoord_idx[3];
};
struct PACKED _MD2_Texcoord
{
short s;
short t;
};
typedef struct _MD2_Loader
{
char *map;
int size;
int skin_width;
int skin_height;
int frame_count;
int frame_size;
char *frames;
int vertex_count;
int triangle_count;
int texcoord_count;
MD2_Triangle *triangles;
MD2_Texcoord *texcoords;
} MD2_Loader;
static const float normal_table[162][3] =
{
{-0.525731f, 0.000000f, 0.850651f},
{-0.442863f, 0.238856f, 0.864188f},
{-0.295242f, 0.000000f, 0.955423f},
{-0.309017f, 0.500000f, 0.809017f},
{-0.162460f, 0.262866f, 0.951056f},
{ 0.000000f, 0.000000f, 1.000000f},
{ 0.000000f, 0.850651f, 0.525731f},
{-0.147621f, 0.716567f, 0.681718f},
{ 0.147621f, 0.716567f, 0.681718f},
{ 0.000000f, 0.525731f, 0.850651f},
{ 0.309017f, 0.500000f, 0.809017f},
{ 0.525731f, 0.000000f, 0.850651f},
{ 0.295242f, 0.000000f, 0.955423f},
{ 0.442863f, 0.238856f, 0.864188f},
{ 0.162460f, 0.262866f, 0.951056f},
{-0.681718f, 0.147621f, 0.716567f},
{-0.809017f, 0.309017f, 0.500000f},
{-0.587785f, 0.425325f, 0.688191f},
{-0.850651f, 0.525731f, 0.000000f},
{-0.864188f, 0.442863f, 0.238856f},
{-0.716567f, 0.681718f, 0.147621f},
{-0.688191f, 0.587785f, 0.425325f},
{-0.500000f, 0.809017f, 0.309017f},
{-0.238856f, 0.864188f, 0.442863f},
{-0.425325f, 0.688191f, 0.587785f},
{-0.716567f, 0.681718f, -0.147621f},
{-0.500000f, 0.809017f, -0.309017f},
{-0.525731f, 0.850651f, 0.000000f},
{ 0.000000f, 0.850651f, -0.525731f},
{-0.238856f, 0.864188f, -0.442863f},
{ 0.000000f, 0.955423f, -0.295242f},
{-0.262866f, 0.951056f, -0.162460f},
{ 0.000000f, 1.000000f, 0.000000f},
{ 0.000000f, 0.955423f, 0.295242f},
{-0.262866f, 0.951056f, 0.162460f},
{ 0.238856f, 0.864188f, 0.442863f},
{ 0.262866f, 0.951056f, 0.162460f},
{ 0.500000f, 0.809017f, 0.309017f},
{ 0.238856f, 0.864188f, -0.442863f},
{ 0.262866f, 0.951056f, -0.162460f},
{ 0.500000f, 0.809017f, -0.309017f},
{ 0.850651f, 0.525731f, 0.000000f},
{ 0.716567f, 0.681718f, 0.147621f},
{ 0.716567f, 0.681718f, -0.147621f},
{ 0.525731f, 0.850651f, 0.000000f},
{ 0.425325f, 0.688191f, 0.587785f},
{ 0.864188f, 0.442863f, 0.238856f},
{ 0.688191f, 0.587785f, 0.425325f},
{ 0.809017f, 0.309017f, 0.500000f},
{ 0.681718f, 0.147621f, 0.716567f},
{ 0.587785f, 0.425325f, 0.688191f},
{ 0.955423f, 0.295242f, 0.000000f},
{ 1.000000f, 0.000000f, 0.000000f},
{ 0.951056f, 0.162460f, 0.262866f},
{ 0.850651f, -0.525731f, 0.000000f},
{ 0.955423f, -0.295242f, 0.000000f},
{ 0.864188f, -0.442863f, 0.238856f},
{ 0.951056f, -0.162460f, 0.262866f},
{ 0.809017f, -0.309017f, 0.500000f},
{ 0.681718f, -0.147621f, 0.716567f},
{ 0.850651f, 0.000000f, 0.525731f},
{ 0.864188f, 0.442863f, -0.238856f},
{ 0.809017f, 0.309017f, -0.500000f},
{ 0.951056f, 0.162460f, -0.262866f},
{ 0.525731f, 0.000000f, -0.850651f},
{ 0.681718f, 0.147621f, -0.716567f},
{ 0.681718f, -0.147621f, -0.716567f},
{ 0.850651f, 0.000000f, -0.525731f},
{ 0.809017f, -0.309017f, -0.500000f},
{ 0.864188f, -0.442863f, -0.238856f},
{ 0.951056f, -0.162460f, -0.262866f},
{ 0.147621f, 0.716567f, -0.681718f},
{ 0.309017f, 0.500000f, -0.809017f},
{ 0.425325f, 0.688191f, -0.587785f},
{ 0.442863f, 0.238856f, -0.864188f},
{ 0.587785f, 0.425325f, -0.688191f},
{ 0.688191f, 0.587785f, -0.425325f},
{-0.147621f, 0.716567f, -0.681718f},
{-0.309017f, 0.500000f, -0.809017f},
{ 0.000000f, 0.525731f, -0.850651f},
{-0.525731f, 0.000000f, -0.850651f},
{-0.442863f, 0.238856f, -0.864188f},
{-0.295242f, 0.000000f, -0.955423f},
{-0.162460f, 0.262866f, -0.951056f},
{ 0.000000f, 0.000000f, -1.000000f},
{ 0.295242f, 0.000000f, -0.955423f},
{ 0.162460f, 0.262866f, -0.951056f},
{-0.442863f, -0.238856f, -0.864188f},
{-0.309017f, -0.500000f, -0.809017f},
{-0.162460f, -0.262866f, -0.951056f},
{ 0.000000f, -0.850651f, -0.525731f},
{-0.147621f, -0.716567f, -0.681718f},
{ 0.147621f, -0.716567f, -0.681718f},
{ 0.000000f, -0.525731f, -0.850651f},
{ 0.309017f, -0.500000f, -0.809017f},
{ 0.442863f, -0.238856f, -0.864188f},
{ 0.162460f, -0.262866f, -0.951056f},
{ 0.238856f, -0.864188f, -0.442863f},
{ 0.500000f, -0.809017f, -0.309017f},
{ 0.425325f, -0.688191f, -0.587785f},
{ 0.716567f, -0.681718f, -0.147621f},
{ 0.688191f, -0.587785f, -0.425325f},
{ 0.587785f, -0.425325f, -0.688191f},
{ 0.000000f, -0.955423f, -0.295242f},
{ 0.000000f, -1.000000f, 0.000000f},
{ 0.262866f, -0.951056f, -0.162460f},
{ 0.000000f, -0.850651f, 0.525731f},
{ 0.000000f, -0.955423f, 0.295242f},
{ 0.238856f, -0.864188f, 0.442863f},
{ 0.262866f, -0.951056f, 0.162460f},
{ 0.500000f, -0.809017f, 0.309017f},
{ 0.716567f, -0.681718f, 0.147621f},
{ 0.525731f, -0.850651f, 0.000000f},
{-0.238856f, -0.864188f, -0.442863f},
{-0.500000f, -0.809017f, -0.309017f},
{-0.262866f, -0.951056f, -0.162460f},
{-0.850651f, -0.525731f, 0.000000f},
{-0.716567f, -0.681718f, -0.147621f},
{-0.716567f, -0.681718f, 0.147621f},
{-0.525731f, -0.850651f, 0.000000f},
{-0.500000f, -0.809017f, 0.309017f},
{-0.238856f, -0.864188f, 0.442863f},
{-0.262866f, -0.951056f, 0.162460f},
{-0.864188f, -0.442863f, 0.238856f},
{-0.809017f, -0.309017f, 0.500000f},
{-0.688191f, -0.587785f, 0.425325f},
{-0.681718f, -0.147621f, 0.716567f},
{-0.442863f, -0.238856f, 0.864188f},
{-0.587785f, -0.425325f, 0.688191f},
{-0.309017f, -0.500000f, 0.809017f},
{-0.147621f, -0.716567f, 0.681718f},
{-0.425325f, -0.688191f, 0.587785f},
{-0.162460f, -0.262866f, 0.951056f},
{ 0.442863f, -0.238856f, 0.864188f},
{ 0.162460f, -0.262866f, 0.951056f},
{ 0.309017f, -0.500000f, 0.809017f},
{ 0.147621f, -0.716567f, 0.681718f},
{ 0.000000f, -0.525731f, 0.850651f},
{ 0.425325f, -0.688191f, 0.587785f},
{ 0.587785f, -0.425325f, 0.688191f},
{ 0.688191f, -0.587785f, 0.425325f},
{-0.955423f, 0.295242f, 0.000000f},
{-0.951056f, 0.162460f, 0.262866f},
{-1.000000f, 0.000000f, 0.000000f},
{-0.850651f, 0.000000f, 0.525731f},
{-0.955423f, -0.295242f, 0.000000f},
{-0.951056f, -0.162460f, 0.262866f},
{-0.864188f, 0.442863f, -0.238856f},
{-0.951056f, 0.162460f, -0.262866f},
{-0.809017f, 0.309017f, -0.500000f},
{-0.864188f, -0.442863f, -0.238856f},
{-0.951056f, -0.162460f, -0.262866f},
{-0.809017f, -0.309017f, -0.500000f},
{-0.681718f, 0.147621f, -0.716567f},
{-0.681718f, -0.147621f, -0.716567f},
{-0.850651f, 0.000000f, -0.525731f},
{-0.688191f, 0.587785f, -0.425325f},
{-0.587785f, 0.425325f, -0.688191f},
{-0.425325f, 0.688191f, -0.587785f},
{-0.425325f, -0.688191f, -0.587785f},
{-0.587785f, -0.425325f, -0.688191f},
{-0.688191f, -0.587785f, -0.425325f},
};
static inline Eina_Bool
_md2_loader_init(MD2_Loader *loader, Eina_File *file)
{
MD2_Header header;
memset(loader, 0x00, sizeof(MD2_Loader));
loader->map = eina_file_map_all(file, EINA_FILE_SEQUENTIAL);
if (loader->map == NULL)
{
ERR("Failed to create map from file %s\n", eina_file_filename_get(file));
goto error;
}
/* Check file size. We require a file larger than MD2 header size. */
loader->size = eina_file_size_get(file);
if (loader->size < (int)sizeof(MD2_Header))
goto error;
/* Read header. */
memcpy(&header, loader->map, sizeof(MD2_Header));
/* Check identity */
if (header.magic != MD2_MAGIC_NUMBER || header.version != MD2_VERSION)
goto error;
/* Check offsets */
if (header.offset_skins > header.offset_end)
goto error;
if (header.offset_texcoords > header.offset_end)
goto error;
if (header.offset_triangles > header.offset_end)
goto error;
if (header.offset_frames > header.offset_end)
goto error;
if (header.offset_glcmds > header.offset_end)
goto error;
if (header.offset_end > loader->size)
goto error;
loader->skin_width = header.skin_width;
loader->skin_height = header.skin_height;
loader->frame_count = header.frame_count;
loader->frame_size = header.frame_size;
loader->frames = loader->map + header.offset_frames;
loader->vertex_count = header.vertex_count;
loader->triangle_count = header.triangle_count;
loader->texcoord_count = header.texcoord_count;
loader->triangles = (MD2_Triangle *)(loader->map + header.offset_triangles);
loader->texcoords = (MD2_Texcoord *)(loader->map + header.offset_texcoords);
return EINA_TRUE;
error:
return EINA_FALSE;
}
void
evas_model_load_file_md2(Evas_3D_Mesh *mesh, Eina_File *file)
{
MD2_Loader loader;
int i, j, k;
float *pos, *nor, *tex;
int stride_pos, stride_nor, stride_tex;
float s_scale, t_scale;
Evas_3D_Mesh_Data *pd;
/* Initialize MD2 loader (Open file and read MD2 head ant etc) */
if (!_md2_loader_init(&loader, file))
{
ERR("Failed to initialize MD2 loader.");
return;
}
s_scale = 1.0 / (float)(loader.skin_width - 1);
t_scale = 1.0 / (float)(loader.skin_height - 1);
eo_do(mesh,
evas_3d_mesh_vertex_count_set(loader.triangle_count * 3),
evas_3d_mesh_vertex_assembly_set(EVAS_3D_VERTEX_ASSEMBLY_TRIANGLES));
/* Load frames */
for (i = 0; i < loader.frame_count; i++)
{
const MD2_Frame *frame = (const MD2_Frame *)(loader.frames + loader.frame_size * i);
int f = i * MD2_FRAME_SCALE;
eo_do(mesh,
/* Add a mesh frame. */
evas_3d_mesh_frame_add(f),
/* Allocate vertex buffer for the frame. */
evas_3d_mesh_frame_vertex_data_copy_set(f, EVAS_3D_VERTEX_POSITION, 0, NULL),
evas_3d_mesh_frame_vertex_data_copy_set(f, EVAS_3D_VERTEX_NORMAL, 0, NULL),
evas_3d_mesh_frame_vertex_data_copy_set(f, EVAS_3D_VERTEX_TEXCOORD, 0, NULL),
/* Map vertex buffer. */
pos = (float *)evas_3d_mesh_frame_vertex_data_map(f, EVAS_3D_VERTEX_POSITION),
nor = (float *)evas_3d_mesh_frame_vertex_data_map(f, EVAS_3D_VERTEX_NORMAL),
tex = (float *)evas_3d_mesh_frame_vertex_data_map(f, EVAS_3D_VERTEX_TEXCOORD),
stride_pos = evas_3d_mesh_frame_vertex_stride_get(f, EVAS_3D_VERTEX_POSITION),
stride_nor = evas_3d_mesh_frame_vertex_stride_get(f, EVAS_3D_VERTEX_NORMAL),
stride_tex = evas_3d_mesh_frame_vertex_stride_get(f, EVAS_3D_VERTEX_TEXCOORD));
if (stride_pos == 0)
stride_pos = sizeof(float) * 3;
if (stride_nor == 0)
stride_nor = sizeof(float) * 3;
if (stride_tex == 0)
stride_tex = sizeof(float) * 2;
for (j = 0; j < loader.triangle_count; j++)
{
const MD2_Triangle *tri = &loader.triangles[j];
for (k = 0; k < 3; k++)
{
unsigned int tidx, vidx;
float *p, *n, *t;
tidx = tri->texcoord_idx[k];
vidx = tri->vertex_idx[k];
p = (float *)((char *)pos + stride_pos * (j * 3 + k));
n = (float *)((char *)nor + stride_nor * (j * 3 + k));
t = (float *)((char *)tex + stride_tex * (j * 3 + k));
p[0] = frame->vertices[vidx].pos[0] * frame->scale[0] + frame->trans[0];
p[1] = frame->vertices[vidx].pos[1] * frame->scale[1] + frame->trans[1];
p[2] = frame->vertices[vidx].pos[2] * frame->scale[2] + frame->trans[2];
n[0] = normal_table[frame->vertices[vidx].normal_idx][0];
n[1] = normal_table[frame->vertices[vidx].normal_idx][1];
n[2] = normal_table[frame->vertices[vidx].normal_idx][2];
t[0] = loader.texcoords[tidx].s * s_scale;
t[1] = 1.0 - loader.texcoords[tidx].t * t_scale;
}
}
/* Unmap vertex buffer. */
eo_do(mesh,
evas_3d_mesh_frame_vertex_data_unmap(f, EVAS_3D_VERTEX_POSITION),
evas_3d_mesh_frame_vertex_data_unmap(f, EVAS_3D_VERTEX_NORMAL),
evas_3d_mesh_frame_vertex_data_unmap(f, EVAS_3D_VERTEX_TEXCOORD));
pd = eo_data_scope_get(mesh, EVAS_3D_MESH_CLASS);
if (!evas_3d_mesh_aabb_add_to_frame(pd, f, stride_pos))
{
ERR("Axis-Aligned Bounding Box wasn't added in frame %d ", f);
}
}
if (loader.map)
{
eina_file_map_free(file, loader.map);
loader.map = NULL;
}
}
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