From 4425ba1c0be62651bfa9769ef458c120ae864d45 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Sat, 2 Feb 2013 21:50:50 -0500
Subject: [PATCH] rotate quad based on time

---
 sdl_opengl_bare.d | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/sdl_opengl_bare.d b/sdl_opengl_bare.d
index 18d8103..566b6db 100644
--- a/sdl_opengl_bare.d
+++ b/sdl_opengl_bare.d
@@ -24,6 +24,8 @@ void display()
 {
     drawing = true;
     glClear(GL_COLOR_BUFFER_BIT);
+    glPushMatrix();
+    glRotatef(SDL_GetTicks() * 90.0 / 1000, 0, 0, 1);
     glBegin(GL_QUADS);
         glColor3f(1, 1, 1);
         glVertex3f(5.0, 5.0, 0.0);
@@ -34,8 +36,9 @@ void display()
         glColor3f(0, 1, 0);
         glVertex3f(5.0, -5.0, 0.0);
     glEnd();
-    SDL_GL_SwapBuffers();
+    glPopMatrix();
     drawing = false;
+    SDL_GL_SwapBuffers();
 }
 
 extern (C) Uint32 timer_callback(Uint32 interval, void *param)
@@ -73,7 +76,7 @@ int main(char[][] args)
 
     init();
     SDL_Event event;
-    SDL_AddTimer(1000 / 50, &timer_callback, null);
+    SDL_AddTimer(1000 / 60, &timer_callback, null);
     while (SDL_WaitEvent(&event))
     {
         if (event.type == SDL_QUIT)