.obj loading

1 files changed, 60 insertions, 0 deletions

diff --git a/src/objload.h b/src/objload.h
new file mode 100644
index 0000000..8993f25
--- /dev/null
+++ b/src/objload.h
@@ -0,0 +1,60 @@
+#ifndef OBJLOAD_H
+#define OBJLOAD_H
+
+#include <stdint.h>
+
+typedef enum OBJ_RESULT {
+    OBJ_SUCCESS = 0,
+    OBJ_LINE_UNKNOWN,
+    OBJ_NOT_SUPPORTED_LINE,
+    OBJ_NOT_SUPPORTED_UNKNOWN,
+    OBJ_ERROR_UNKNOWN,
+} OBJRES;
+
+typedef struct objload {
+    size_t nvert;
+    float (*vertices)[3];
+    
+    size_t nnorm;
+    float (*normals)[3];
+    
+    size_t nuv;
+    float (*uvcoord)[2];
+
+    size_t nfaces;
+    struct face {
+        size_t vertidx;
+        size_t normidx;
+        size_t uvidx;
+    } (*faces)[3];
+} objload_t;
+
+
+struct obj_struct_metadata {
+    size_t full_sz;
+    
+    size_t vert_off;
+    size_t norm_off;
+    size_t uvtx_off;
+    
+    enum {
+        OBJ_STRUCT_VERT_EXISTS = 1 << 0,
+        OBJ_STRUCT_NORM_EXISTS = 1 << 1,
+        OBJ_STRUCT_UVTX_EXISTS = 1 << 2,
+        OBJ_STRUCT_ALL_EXIST   = 7,
+    } exist_flag;
+};
+
+typedef uint32_t obj_idx;
+
+OBJRES obj_load(FILE *fp, objload_t *obj);
+void obj_free(objload_t obj);
+
+OBJRES obj_transfer_raw(objload_t obj,
+                        struct obj_struct_metadata metadata,
+                        size_t *nvbo, void *vbo);
+
+// OBJRES obj_transfer_indxed(objload_t obj,
+                           // size_t *nvbo, obj_vbo vbo,
+                           // size_t *nidx, obj_idx ibo);
+#endif