6 files changed, 44 insertions, 11 deletions
diff --git a/Makefile b/Makefile
index 94d9c57..4259e2c 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ EXT=.exe
 
 EXE=glpong${EXT}
 
-OBJS=glpong.o ball.o text.o #paddle.o
+OBJS=glpong.o ball.o text.o fps.o #paddle.o
 	
 all: ${OBJS}
 	${CC} ${LDFLAGS} ${OBJS} -o ${EXE} ${LIBRARIES}
diff --git a/fps.c b/fps.c
new file mode 100644
index 0000000..4379e38
--- /dev/null
+++ b/fps.c
@@ -0,0 +1,27 @@
+#include <time.h>
+
+#include "SDL.h"
+#include "SDL_opengl.h"
+
+#include "text.h"
+#include "fps.h"
+
+static clock_t start;
+static GLfloat fps;
+
+void
+GLPong_FPSInit() {
+	start = SDL_GetTicks();
+}
+
+void
+GLPong_FPSCount() {
+	// 10.0f is the number of frames we let draw before calculating FPS
+	fps = 10.0f / (SDL_GetTicks() - start) * 1000; // 1 sec / 1 millisec == 1000
+	start = SDL_GetTicks();
+}
+
+void
+GLPong_FPSPrint() {
+	printf("%.2f frames per second\n", fps);
+}
diff --git a/fps.h b/fps.h
new file mode 100644
index 0000000..4b965b9
--- /dev/null
+++ b/fps.h
@@ -0,0 +1,9 @@
+#ifndef FPS_H
+#define FPS_H
+
+void GLPong_FPSInit();
+void GLPong_FPSCount();
+void GLPong_FPSPrint();
+
+#endif
+
diff --git a/glpong.c b/glpong.c
index cca1238..a1d9b53 100644
--- a/glpong.c
+++ b/glpong.c
@@ -5,9 +5,11 @@
 #include "SDL.h"
 #include "SDL_opengl.h"
 #include "SDL_image.h"
+#include <GL/glc.h>
 
 #include "glpong.h"
 #include "text.h"
+#include "fps.h"
 
 static int  GLPong_Init(GLPong_t * GLPong);
 static void GLPong_Deinit(GLPong_t * GLPong);
@@ -25,8 +27,6 @@ int main(int argc, char * argv[]) {
 		GLPONG_HEIGHT
 	};
 	
-	clock_t start;
-	GLfloat fps;
 	unsigned int frames = 0;
 	int action;
 	int done = 0;
@@ -48,7 +48,7 @@ int main(int argc, char * argv[]) {
 	printf("%d balls\n", length(GLPong.balls));
 #endif
 
-	start = SDL_GetTicks();
+	GLPong_FPSInit();
 	
 	while ( !done ) {
 		action = GLPong_HandleEvents();
@@ -69,14 +69,14 @@ int main(int argc, char * argv[]) {
 
 		SDL_GL_SwapBuffers();
 		/* end drawing */
-		
+
 		frames++;
 		if (frames == 10) {
-			fps = (GLfloat) frames / (SDL_GetTicks() - start) * 1000;
+			GLPong_FPSCount();
 			frames = 0;
-			start = SDL_GetTicks();
-			//printf("%.2f frames per second\n", GLPong.fps);
+			GLPong_FPSPrint();
 		}
+		
 		SDL_Delay(10);
 	}
 	
diff --git a/text.c b/text.c
index cd90efe..2694e4b 100644
--- a/text.c
+++ b/text.c
@@ -1,4 +1,3 @@
-
 #include <GL/glc.h>
 
 #include "text.h"
diff --git a/text.h b/text.h
index dfc3458..456fb8b 100644
--- a/text.h
+++ b/text.h
@@ -1,8 +1,6 @@
 #ifndef TEXT_H
 #define TEXT_H
 
-#include <GL/glc.h>
-
 int  GLPong_TextInit();
 void GLPong_TextDeinit();
 void GLPong_TextDrawFPS(GLfloat fps);