Initial commit

1 files changed, 52 insertions, 0 deletions

diff --git a/09-september/tomcat/util/util_time.c b/09-september/tomcat/util/util_time.c
new file mode 100644
index 0000000..e56d997
--- /dev/null
+++ b/09-september/tomcat/util/util_time.c
@@ -0,0 +1,52 @@
+#include "util_time.h"
+
+static struct
+{
+    float max_ticks_per_frame; //< cuantos ticks (tiempo demora) un frame
+    Uint32 counted_frames; //< cuantos frames han pasado
+    Uint32 start_ticks;    //< ticks al iniciar la iteracion del loop
+    Uint32 beg_ticks;      //< ticks desde el inicio del juego
+    Uint32 time_per_frame;
+} TIME = {
+    1000.0f / 60.0f,
+    0, 0, 0, 0
+};
+
+void Time_Init()
+{
+    TIME.beg_ticks = SDL_GetTicks();
+}
+
+void Time_Begin()
+{
+    TIME.start_ticks = SDL_GetTicks();
+}
+
+float Time_End()
+{
+    TIME.counted_frames += 1;
+    float FPS = (float)TIME.counted_frames / ( (float)(SDL_GetTicks() - TIME.beg_ticks) / 1000.0f );
+
+    float frameTicks = (float)(SDL_GetTicks() - TIME.start_ticks);
+    TIME.time_per_frame = frameTicks;
+    if(frameTicks < TIME.max_ticks_per_frame){
+        SDL_Delay( (Uint32)(TIME.max_ticks_per_frame - frameTicks) );
+    }
+
+    return FPS;
+}
+
+float Time_GetFrameTime()
+{
+    return (float)TIME.time_per_frame / 1000.0f;
+}
+
+void Time_SetMaxFramesPerSecond(Uint32 frames)
+{
+    TIME.max_ticks_per_frame = 1000.0f / (float)frames;
+}
+
+Uint32 Time_GetCountedFrames()
+{
+    return TIME.counted_frames;
+}