--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Xcode/TemplatesForXcode/SDL OpenGL Application/main.c	Sat Jul 21 17:09:01 2007 +0000
@@ -0,0 +1,179 @@
+
+/* Simple program:  Create a blank window, wait for keypress, quit.
+
+   Please see the SDL documentation for details on using the SDL API:
+   /Developer/Documentation/SDL/docs.html
+*/
+   
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+#include "SDL.h"
+
+extern void Atlantis_Init ();
+extern void Atlantis_Reshape (int w, int h);
+extern void Atlantis_Animate ();
+extern void Atlantis_Display ();
+
+static SDL_Surface *gScreen;
+
+static void initAttributes ()
+{
+    // Setup attributes we want for the OpenGL context
+    
+    int value;
+    
+    // Don't set color bit sizes (SDL_GL_RED_SIZE, etc)
+    //    Mac OS X will always use 8-8-8-8 ARGB for 32-bit screens and
+    //    5-5-5 RGB for 16-bit screens
+    
+    // Request a 16-bit depth buffer (without this, there is no depth buffer)
+    value = 16;
+    SDL_GL_SetAttribute (SDL_GL_DEPTH_SIZE, value);
+    
+    
+    // Request double-buffered OpenGL
+    //     The fact that windows are double-buffered on Mac OS X has no effect
+    //     on OpenGL double buffering.
+    value = 1;
+    SDL_GL_SetAttribute (SDL_GL_DOUBLEBUFFER, value);
+}
+
+static void printAttributes ()
+{
+    // Print out attributes of the context we created
+    int nAttr;
+    int i;
+    
+    int  attr[] = { SDL_GL_RED_SIZE, SDL_GL_BLUE_SIZE, SDL_GL_GREEN_SIZE,
+                    SDL_GL_ALPHA_SIZE, SDL_GL_BUFFER_SIZE, SDL_GL_DEPTH_SIZE };
+                    
+    char *desc[] = { "Red size: %d bits\n", "Blue size: %d bits\n", "Green size: %d bits\n",
+                     "Alpha size: %d bits\n", "Color buffer size: %d bits\n", 
+                     "Depth bufer size: %d bits\n" };
+
+    nAttr = sizeof(attr) / sizeof(int);
+    
+    for (i = 0; i < nAttr; i++) {
+    
+        int value;
+        SDL_GL_GetAttribute (attr[i], &value);
+        printf (desc[i], value);
+    } 
+}
+
+static void createSurface (int fullscreen)
+{
+    Uint32 flags = 0;
+    
+    flags = SDL_OPENGL;
+    if (fullscreen)
+        flags |= SDL_FULLSCREEN;
+    
+    // Create window
+    gScreen = SDL_SetVideoMode (640, 480, 0, flags);
+    if (gScreen == NULL) {
+		
+        fprintf (stderr, "Couldn't set 640x480 OpenGL video mode: %s\n",
+                 SDL_GetError());
+		SDL_Quit();
+		exit(2);
+	}
+}
+
+static void initGL ()
+{
+    Atlantis_Init ();
+    Atlantis_Reshape (gScreen->w, gScreen->h);
+}
+
+static void drawGL ()
+{
+    Atlantis_Animate ();
+    Atlantis_Display ();
+}
+
+static void mainLoop ()
+{
+    SDL_Event event;
+    int done = 0;
+    int fps = 24;
+	int delay = 1000/fps;
+    int thenTicks = -1;
+    int nowTicks;
+    
+    while ( !done ) {
+
+		/* Check for events */
+		while ( SDL_PollEvent (&event) ) {
+			switch (event.type) {
+
+				case SDL_MOUSEMOTION:
+					break;
+				case SDL_MOUSEBUTTONDOWN:
+					break;
+				case SDL_KEYDOWN:
+					/* Any keypress quits the app... */
+				case SDL_QUIT:
+					done = 1;
+					break;
+				default:
+					break;
+			}
+		}
+    
+        // Draw at 24 hz
+        //     This approach is not normally recommended - it is better to
+        //     use time-based animation and run as fast as possible
+        drawGL ();
+        SDL_GL_SwapBuffers ();
+
+        // Time how long each draw-swap-delay cycle takes
+        // and adjust delay to get closer to target framerate
+        if (thenTicks > 0) {
+            nowTicks = SDL_GetTicks ();
+            delay += (1000/fps - (nowTicks-thenTicks));
+            thenTicks = nowTicks;
+            if (delay < 0)
+                delay = 1000/fps;
+        }
+        else {
+            thenTicks = SDL_GetTicks ();
+        }
+
+        SDL_Delay (delay);
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	// Init SDL video subsystem
+	if ( SDL_Init (SDL_INIT_VIDEO) < 0 ) {
+		
+        fprintf(stderr, "Couldn't initialize SDL: %s\n",
+			SDL_GetError());
+		exit(1);
+	}
+
+    // Set GL context attributes
+    initAttributes ();
+    
+    // Create GL context
+    createSurface (0);
+    
+    // Get GL context attributes
+    printAttributes ();
+    
+    // Init GL state
+    initGL ();
+    
+    // Draw, get events...
+    mainLoop ();
+    
+    // Cleanup
+	SDL_Quit();
+	
+    return 0;
+}