Rework bone and animation structure

model.h

@@ -3,8 +3,8 @@
 
 #include "linear_alg.h"
 
-#include <stdint.h>
 #include <stddef.h>
+#include <stdint.h>
 
 typedef uint16_t index_t;
 
@@ -16,28 +16,21 @@ typedef struct {
 } vertex_t;
 
 typedef struct {
-	uint32_t parent;
 	vec3_t translation;
 	vec4_t rotation;
-	vec3_t scale;
 } bone_t;
 
 typedef struct {
-	vec3_t *translations;
-	vec4_t *rotations;
-	vec3_t *scales;
-} animation_bone_t;
-
-typedef struct {
-	float *times;
-	size_t keyframe_count;
-	animation_bone_t *bones;
+	uint32_t *times_us;
+	bone_t *keyframes;
+	size_t length_us, keyframe_count;
 } animation_t;
 
 typedef struct {
 	vertex_t *vertices;
 	index_t *indices;
 	bone_t *bones;
+	uint32_t *bone_parents;
 	mat4_t *inverse_bind_matrices;
 	animation_t animation;
 	size_t vertex_count;