Handle skipped keyframes

animation.c

@@ -110,7 +110,8 @@ void animation_update(
     animation_state_t *state, const model_t *model, uint32_t dt_us)
 {
 	state->elapsed_us += dt_us;
-	if (state->elapsed_us >= state->duration_us) { // Move to next keyframe
+	while (state->elapsed_us >= state->duration_us) {
+		assert(state->duration_us != 0);
 		state->elapsed_us -= state->duration_us;
 		state->current_keyframe = state->next_keyframe;
 		load_keyframe(state, model);