1 files changed, 21 insertions, 0 deletions
diff --git a/game_time.c b/game_time.c
new file mode 100644
index 0000000..af116b6
--- /dev/null
+++ b/game_time.c
@@ -0,0 +1,21 @@
+#include <SDL2/SDL.h>
+#include "./constants.h"
+
+int last_frame_time = 0;
+
+void delay(void) {
+	// logic to keep a fixed timestep
+	int time_to_wait = FRAME_TARGET_TIME - (SDL_GetTicks() - last_frame_time);
+	
+	if(time_to_wait > 0 && time_to_wait <= FRAME_TARGET_TIME) {
+		SDL_Delay(time_to_wait);
+	}
+}
+
+float get_delta_time() {
+	// get a delta time factor converted to seconds
+	float delta_time = (SDL_GetTicks() - last_frame_time) / 1000.0f;
+
+	last_frame_time = SDL_GetTicks();
+	return delta_time;
+}