System info & network

code/file_formats/wavefront.h

@@ -0,0 +1,121 @@
+#ifndef _PIUMA_WAVEFRONT_H_
+#define _PIUMA_WAVEFRONT_H_
+
+#include "../lib/types.h"
+#include "../lib/math.h"
+
+typedef void *(*wf_alloc_t)(u64 size);
+typedef void *(*wf_realloc_t)(void *ptr, u64 size);
+typedef void  (*wf_free_t)(void *ptr);
+
+/* Reassing wf_alloc and wf_free with your own alloc/free functions if you don't
+ * want to use malloc and free.
+ */
+extern wf_alloc_t   wf_alloc;
+extern wf_realloc_t wf_realloc;
+extern wf_free_t    wf_free;
+
+typedef u32 wf_index;
+typedef u32 wf_size;
+
+
+// Indices are 1-based in Wavefront. 0 is used to signal the index was omitted.
+struct wf_face_index
+{
+	wf_index vertex;
+	wf_index texture;
+	wf_index normal;
+};
+
+struct wf_face
+{
+	wf_face_index indices[3];
+};
+
+struct wf_object
+{
+	char *name;
+	// @Feature: groups are not supported yet
+	char *material_name;
+
+	// Vertices
+	v4 *vertices;
+	wf_size vertices_count;
+	// Texture coordinates
+	v3 *texture_coords;
+	wf_size texture_coords_count;
+	// Vertex normals
+	v3 *normals;
+	wf_size normals_count;
+	// Faces
+	wf_face *faces;
+	wf_size faces_count;
+};
+
+struct wf_obj_file
+{
+	char *name;
+
+	char **mtllib_names;
+	wf_size mtllib_names_count;
+
+	wf_object *objects;
+	wf_size objects_count;
+};
+
+
+
+
+struct wf_material
+{
+	char *name;
+	v3 Ka;  // ambient color
+	v3 Kd;  // diffuse color
+	v3 Ke;  // emissive color
+	v3 Ks;  // specular color
+	f32 Ns; // specular exposure
+	f32 d;  // dissolved - transparency where 0.0 is fully transparent and 1.0 is opaque
+	f32 Ni; // optical density - refractive index
+	int illum; // illumination model
+	/* illum is described at https://en.wikipedia.org/wiki/Wavefront_.obj_file#Basic_materials as follows:
+	 * 0. Color on and Ambient off
+	 * 1. Color on and Ambient on
+	 * 2. Highlight on
+	 * 3. Reflection on and Ray trace on
+	 * 4. Transparency: Glass on, Reflection: Ray trace on
+	 * 5. Reflection: Fresnel on and Ray trace on
+	 * 6. Transparency: Refraction on, Reflection: Fresnel off and Ray trace on
+	 * 7. Transparency: Refraction on, Reflection: Fresnel on and Ray trace on
+	 * 8. Reflection on and Ray trace off
+	 * 9. Transparency: Glass on, Reflection: Ray trace off
+	 * 10. Casts shadows onto invisible surfaces
+	 */
+
+	char *map_Ka; // ambient texture map name
+	char *map_Kd; // diffuse texture map name
+	char *map_Ke; // emissive texture map name
+	char *map_Ks; // specular color texture map name
+	char *map_Ns; // specular highlight texture map name
+	char *map_d;  // alpha texture map name
+	char *bump;   // bump map name
+	char *disp;   // displacement map name
+	char *decal;  // stencil decal texture map name
+
+	// @Feature: Texture options are not supported yet
+};
+
+struct wf_mtl_file
+{
+	char *name;
+
+	wf_material *materials;
+	wf_size materials_count;
+};
+
+
+bool wf_parse_obj(char *data, u64 size, const char *name, wf_obj_file *return_obj);
+bool wf_parse_mtl(char *data, u64 size, const char *name, wf_mtl_file *return_mtl);
+void wf_cleanup_obj(wf_obj_file *obj_file);
+void wf_cleanup_mtl(wf_mtl_file *mtl_file);
+
+#endif