Implement basic GLB model loading

main.c

@@ -1,5 +1,5 @@
 #include "gpu.h"
-#include "model_format_utah.h"
+#include "model_format_glb.h"
 
 #include <assert.h>
 #include <math.h>
@@ -51,7 +51,7 @@ int main(int argc, char *argv[])
 		fprintf(stderr, "Usage: %s PATH/TO/MODEL\n", argv[0]);
 		return 1;
 	}
-	model_t model = model_format_utah_read(argv[1]);
+	model_t model = model_format_glb_read(argv[1]);
 
 	// Set up window
 	glfwInit();
@@ -74,9 +74,14 @@ int main(int argc, char *argv[])
 	const vec3_t cam = { 0, 4, -4 };
 	const vec3_t tgt = { 0, 0.5, 0 };
 	mvp_t mvp = {
-		.model = MAT4_SCALE(0.667),
+		.model = (mat4_t) {
+			{ 0, 0, -1, 0 },
+			{ -1, 0, 0, 0 },
+			{ 0, 1, 0, 0 },
+			{ 0, 0, 0, 1 },
+		},
 		.view = mat4_lookat(cam, tgt, (vec3_t) { 0, 1, 0 }),
-		.proj = mat4_perspective((float)W / H, PI / 6, 0.1, 10.0),
+		.proj = mat4_perspective((float)W / H, PI / 12, 0.1, 10.0),
 	};
 
 	const mat4_t rotx = MAT4_ROTATE_X(PI / 128);