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VC++ 7.1 ----------------------- Функция загрузки 3ds main.h ----------------------------------------------------------------------------- | Код |
#define MAX_VERTICES 65535 // Max number of vertices (for each object)
#define MAX_POLYGONS 65535 // Max number of polygons (for each object)
// Our vertex type
typedef struct{
float x,y,z;
}vertex_type;
// The polygon (triangle), 3 numbers that aim 3 vertices
typedef struct{
int a,b,c;
}polygon_type;
// The mapcoord type, 2 texture coordinates for each vertex
typedef struct{
float u,v;
}mapcoord_type;
// The object type
typedef struct {
char name[20];
int vertices_qty;
int polygons_qty;
vertex_type vertex[MAX_VERTICES];
polygon_type polygon[MAX_POLYGONS];
mapcoord_type mapcoord[MAX_VERTICES];
int id_texture;
} obj_type, *obj_type_ptr;
extern char Load3DS (obj_type_ptr ogg, char *filename);
--------------------------------------------
function code
--------------------------------------------
main.cpp
---------------------------------------------
char Load3DS (obj_type_ptr p_object, char *p_filename) {
int i;
FILE *l_file;
unsigned short l_chunk_id;
unsigned int l_chunk_lenght;
unsigned char l_char;
unsigned short l_qty;
unsigned short l_face_flags;
if ((l_file=fopen (p_filename, "rb"))== NULL) return 0;
while (ftell (l_file) < filelength (fileno (l_file))) {
fread (&l_chunk_id, 2, 1, l_file);
fread (&l_chunk_lenght, 4, 1, l_file);
switch (l_chunk_id) {
//----------------- MAIN3DS -----------------
// Description: Main chunk, contains all the other chunks
// Chunk ID: 4d4d
// Chunk Lenght: 0 + sub chunks
//-------------------------------------------
case 0x4d4d:
break;
//----------------- EDIT3DS -----------------
// Description: 3D Editor chunk, objects layout info
// Chunk ID: 3d3d (hex)
// Chunk Lenght: 0 + sub chunks
//-------------------------------------------
case 0x3d3d:
break;
//--------------- EDIT_OBJECT ---------------
// Description: Object block, info for each object
// Chunk ID: 4000 (hex)
// Chunk Lenght: len(object name) + sub chunks
//-------------------------------------------
case 0x4000:
i=0;
do {
fread (&l_char, 1, 1, l_file);
p_object->name[i]=l_char;
i++;
} while(l_char != '\0' && i<20);
break;
//--------------- OBJ_TRIMESH ---------------
// Description: Triangular mesh, contains chunks for 3d mesh info
// Chunk ID: 4100 (hex)
// Chunk Lenght: 0 + sub chunks
//-------------------------------------------
case 0x4100:
break;
//--------------- TRI_VERTEXL ---------------
// Description: Vertices list
// Chunk ID: 4110 (hex)
// Chunk Lenght: 1 x unsigned short (number of vertices)
// + 3 x float (vertex coordinates) x (number of vertices)
// + sub chunks
//-------------------------------------------
case 0x4110:
fread (&l_qty, sizeof (unsigned short), 1, l_file);
p_object->vertices_qty = l_qty;
for (i=0; i<l_qty; i++) {
fread (&p_object->vertex[i].x, sizeof(float), 1, l_file);
fread (&p_object->vertex[i].y, sizeof(float), 1, l_file);
fread (&p_object->vertex[i].z, sizeof(float), 1, l_file);
}
break;
//--------------- TRI_FACEL1 ----------------
// Description: Polygons (faces) list
// Chunk ID: 4120 (hex)
// Chunk Lenght: 1 x unsigned short (number of polygons)
// + 3 x unsigned short (polygon points) x (number of polygons)
// + sub chunks
//-------------------------------------------
case 0x4120:
fread (&l_qty, sizeof (unsigned short), 1, l_file);
p_object->polygons_qty = l_qty;
for (i=0; i<l_qty; i++) {
fread (&p_object->polygon[i].a, sizeof (unsigned short), 1, l_file);
fread (&p_object->polygon[i].b, sizeof (unsigned short), 1, l_file);
fread (&p_object->polygon[i].c, sizeof (unsigned short), 1, l_file);
fread (&l_face_flags, sizeof (unsigned short), 1, l_file);
}
break;
//------------- TRI_MAPPINGCOORS ------------
// Description: Vertices list
// Chunk ID: 4140 (hex)
// Chunk Lenght: 1 x unsigned short (number of mapping points)
// + 2 x float (mapping coordinates) x (number of mapping points)
// + sub chunks
//-------------------------------------------
case 0x4140:
fread (&l_qty, sizeof (unsigned short), 1, l_file);
for (i=0; i<l_qty; i++) {
fread (&p_object->mapcoord[i].u, sizeof (float), 1, l_file);
fread (&p_object->mapcoord[i].v, sizeof (float), 1, l_file);
}
break;
//----------- Skip unknow chunks ------------
//We need to skip all the chunks that currently we don't use
//We use the chunk lenght information to set the file pointer
//to the same level next chunk
//-------------------------------------------
default:
fseek(l_file, l_chunk_lenght-6, SEEK_CUR);
}
}
fclose (l_file); // Closes the file stream
return (1); // Returns ok
}
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------------------------------------------------------ Затем В проге объяви object для 3D объекта obj_type object; --------------------------------------------- Ну и на этапе инициализации (у меня в функции InitScene() ) пиши | Код |
Load3DS (&object,"sun.3ds"); Грузим солнце
KOOF=0.7; кооф сжатия (чтоб не ебатца :) )
SUN=glGenLists(1); Делаем лист
glNewList(SUN, GL_COMPILE); начинаем
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Расчет нормалей!! | Код |
int l_index;
for (l_index=0;l_index<object.polygons_qty;l_index++) {
float vx1,vy1,vz1,nx,ny,nz;
float vx2,vy2,vz2,wrki;
vx1 = object.vertex[ object.polygon[l_index].a ].x-
object.vertex[ object.polygon[l_index].b ].x;
vy1 = object.vertex[ object.polygon[l_index].a ].y-
object.vertex[ object.polygon[l_index].b ].y;
vz1 = object.vertex[ object.polygon[l_index].a ].z-
object.vertex[ object.polygon[l_index].b ].z;
vx2 = object.vertex[ object.polygon[l_index].b ].x-
object.vertex[ object.polygon[l_index].c ].x;
vy2 = object.vertex[ object.polygon[l_index].b ].y-
object.vertex[ object.polygon[l_index].c ].y;
vz2 = object.vertex[ object.polygon[l_index].b ].z-
object.vertex[ object.polygon[l_index].c ].z;
// вектор перпендикулярен центру треугольника
nx = vy1 * vz2 - vz1 * vy2;
ny = vz1 * vx2 - vx1 * vz2;
nz = vx1 * vy2 - vy1 * vx2;
// получаем унитарный вектор единичной длины
wrki = sqrt (nx * nx + ny * ny + nz * nz);
if (wrki==0) wrki=1; // для предотвращения деления на ноль
vx1 = nx / wrki;
vy1 = ny / wrki;
vz1 = nz / wrki;
// вот они нормали! :))
glNormal3f(vx1,vy1,vz1);
//---------------------------------------------------
glBegin(GL_TRIANGLES);
//----------------- FIRST VERTEX -----------------
// Texture
glTexCoord2f( object.mapcoord[ object.polygon[l_index].a ].u,
object.mapcoord[ object.polygon[l_index].a ].v);
// Coordinates
glVertex3f( object.vertex[ object.polygon[l_index].a ].x*KOOF,
object.vertex[ object.polygon[l_index].a ].y*KOOF,
object.vertex[ object.polygon[l_index].a ].z*KOOF);
//----------------- SECOND VERTEX -----------------
// Texture
glTexCoord2f( object.mapcoord[ object.polygon[l_index].b ].u,
object.mapcoord[ object.polygon[l_index].b ].v);
// Coordinates
glVertex3f( object.vertex[ object.polygon[l_index].b ].x*KOOF,
object.vertex[ object.polygon[l_index].b ].y*KOOF,
object.vertex[ object.polygon[l_index].b ].z*KOOF);
//----------------- THIRD VERTEX -----------------
// Texture
glTexCoord2f( object.mapcoord[ object.polygon[l_index].c ].u,
object.mapcoord[ object.polygon[l_index].c ].v);
// Coordinates
glVertex3f( object.vertex[ object.polygon[l_index].c ].x*KOOF,
object.vertex[ object.polygon[l_index].c ].y*KOOF,
object.vertex[ object.polygon[l_index].c ].z*KOOF);
glEnd();
}
glEndList(); заканчиваем
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Проблема с форматом .3ds. Нету чанка 0x4110 и других. 
Загрузка ...
надо было искать в HIEW'e не 41 10 а 10 41 
