87 lines
2.5 KiB
C++
87 lines
2.5 KiB
C++
///
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/// [?] - Cache bitmaps
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/// [ ] - Fix potential portability issues due to compiler struct alignment differences etc.
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///
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struct Obj_Index {
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int vertex[3];
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int tex[3];
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int normal[3];
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S32 material_id;
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S32 smoothing_group_id;
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};
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struct Obj_Mesh {
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char name[64];
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Array<Obj_Index> indices;
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};
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struct Obj_Material {
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char name[64];
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U32 name_len;
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Bitmap texture_ambient; // map_Ka
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Bitmap texture_diffuse; // map_Kd
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Bitmap texture_dissolve; // map_d
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Bitmap texture_displacement; // map_Disp
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F32 non_transparency; // d
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F32 transparency; // Tr
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F32 optical_density; // Ni
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F32 shininess; // Ns
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S32 illumination_model; // illum
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Vec3 ambient_color; // Ka
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Vec3 diffuse_color; // Kd
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Vec3 specular_color; // Ks
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};
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struct Obj {
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String name;
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Array<Vec3> vertices;
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Array<Vec2> texture_coordinates;
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Array<Vec3> normals;
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Array<Obj_Mesh> mesh;
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Array<Obj_Material> materials;
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};
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struct Stream{
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U8 *cursor;
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U8 *end;
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};
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#define stream_read_array(s,T,c) (T *)stream_read(s,sizeof(T)*(c))
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#define stream_read_struct(s,T) stream_read_array(s,T,1)
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function void *
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stream_read(Stream *s, SizeU size){
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U8 *result = s->cursor;
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s->cursor += size;
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assert(s->end >= s->cursor);
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return result;
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}
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function Obj *
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load_obj_dump(Allocator *allocator, String filename){
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String string = os_read_file(allocator, filename);
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Stream stream = {string.str, string.str + string.len};
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Obj *obj = stream_read_struct(&stream, Obj);
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obj->name.str = stream_read_array(&stream, U8, obj->name.len);
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obj->texture_coordinates.data = stream_read_array(&stream, Vec2, obj->texture_coordinates.len);
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obj->vertices.data = stream_read_array(&stream, Vec3, obj->vertices.len);
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obj->normals.data = stream_read_array(&stream, Vec3, obj->normals.len);
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obj->mesh.data = stream_read_array(&stream, Obj_Mesh, obj->mesh.len);
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obj->materials.data = stream_read_array(&stream, Obj_Material, obj->materials.len);
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For(obj->mesh){
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it.indices.data = stream_read_array(&stream, Obj_Index, it.indices.len);
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}
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For(obj->materials){
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it.texture_ambient.pixels = stream_read_array(&stream, U32, it.texture_ambient.x*it.texture_ambient.y);
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it.texture_diffuse.pixels = stream_read_array(&stream, U32, it.texture_diffuse.x*it.texture_diffuse.y);
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it.texture_dissolve.pixels = stream_read_array(&stream, U32, it.texture_dissolve.x*it.texture_dissolve.y);
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it.texture_displacement.pixels = stream_read_array(&stream, U32, it.texture_displacement.x*it.texture_displacement.y);
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}
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return obj;
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}
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