122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
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#ifndef _PIUMA_WAVEFRONT_H_
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#define _PIUMA_WAVEFRONT_H_
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#include "../lib/types.h"
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#include "../lib/math.h"
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typedef void *(*wf_alloc_t)(u64 size);
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typedef void *(*wf_realloc_t)(void *ptr, u64 size);
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typedef void (*wf_free_t)(void *ptr);
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/* Reassing wf_alloc and wf_free with your own alloc/free functions if you don't
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* want to use malloc and free.
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*/
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extern wf_alloc_t wf_alloc;
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extern wf_realloc_t wf_realloc;
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extern wf_free_t wf_free;
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typedef u32 wf_index;
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typedef u32 wf_size;
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// Indices are 1-based in Wavefront. 0 is used to signal the index was omitted.
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struct wf_face_index
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{
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wf_index vertex;
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wf_index texture;
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wf_index normal;
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};
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struct wf_face
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{
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wf_face_index indices[3];
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};
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struct wf_object
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{
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char *name;
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// @Feature: groups are not supported yet
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char *material_name;
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// Vertices
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v4 *vertices;
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wf_size vertices_count;
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// Texture coordinates
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v3 *texture_coords;
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wf_size texture_coords_count;
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// Vertex normals
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v3 *normals;
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wf_size normals_count;
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// Faces
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wf_face *faces;
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wf_size faces_count;
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};
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struct wf_obj_file
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{
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char *name;
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char **mtllib_names;
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wf_size mtllib_names_count;
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wf_object *objects;
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wf_size objects_count;
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};
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struct wf_material
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{
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char *name;
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v3 Ka; // ambient color
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v3 Kd; // diffuse color
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v3 Ke; // emissive color
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v3 Ks; // specular color
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f32 Ns; // specular exposure
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f32 d; // dissolved - transparency where 0.0 is fully transparent and 1.0 is opaque
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f32 Ni; // optical density - refractive index
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int illum; // illumination model
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/* illum is described at https://en.wikipedia.org/wiki/Wavefront_.obj_file#Basic_materials as follows:
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* 0. Color on and Ambient off
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* 1. Color on and Ambient on
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* 2. Highlight on
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* 3. Reflection on and Ray trace on
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* 4. Transparency: Glass on, Reflection: Ray trace on
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* 5. Reflection: Fresnel on and Ray trace on
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* 6. Transparency: Refraction on, Reflection: Fresnel off and Ray trace on
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* 7. Transparency: Refraction on, Reflection: Fresnel on and Ray trace on
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* 8. Reflection on and Ray trace off
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* 9. Transparency: Glass on, Reflection: Ray trace off
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* 10. Casts shadows onto invisible surfaces
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*/
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char *map_Ka; // ambient texture map name
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char *map_Kd; // diffuse texture map name
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char *map_Ke; // emissive texture map name
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char *map_Ks; // specular color texture map name
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char *map_Ns; // specular highlight texture map name
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char *map_d; // alpha texture map name
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char *bump; // bump map name
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char *disp; // displacement map name
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char *decal; // stencil decal texture map name
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// @Feature: Texture options are not supported yet
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};
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struct wf_mtl_file
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{
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char *name;
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wf_material *materials;
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wf_size materials_count;
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};
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bool wf_parse_obj(char *data, u64 size, const char *name, wf_obj_file *return_obj);
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bool wf_parse_mtl(char *data, u64 size, const char *name, wf_mtl_file *return_mtl);
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void wf_cleanup_obj(wf_obj_file *obj_file);
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void wf_cleanup_mtl(wf_mtl_file *mtl_file);
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#endif
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