set up modelview matrix, bigger window

template/test.cc

@@ -3,14 +3,22 @@
 #include <GL/gl.h>
 #include <GL/glu.h>
 
-#define WIDTH   500
-#define HEIGHT  500
+#define WIDTH   800
+#define HEIGHT  600
 
-void init(void)
+GLuint vs, fs;
+
+void init(int width, int height)
 {
     glClearColor (0.0, 0.0, 0.0, 0.0);
     glEnable(GL_DEPTH_TEST);
     glViewport(0, 0, WIDTH, HEIGHT);
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glOrtho((float)-width/(float)height, (float)width/(float)height,
+            -1, 1, -1, 1);
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
 }
 
 void display(void)
@@ -39,7 +47,7 @@ int main(int argc, char *argv[])
     }
     SDL_WM_SetCaption(argv[0], argv[0]);
 
-    init();
+    init(WIDTH, HEIGHT);
     display();
     SDL_Event event;
     while (SDL_WaitEvent(&event))