From: Ash Tyndall <git@atyndall.net>
Date: Tue, 18 Oct 2011 11:41:45 +0000 (+0800)
Subject: (no commit message)
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=6f5b17c9cccc5ffa90dbccab465b1010504f8d75;p=atyndall%2Fcits2231.git

---

diff --git a/scene.c b/scene.c
index cc96c00..caa7f19 100644
--- a/scene.c
+++ b/scene.c
@@ -602,13 +602,16 @@ void drawSquare(int recurseLevel, GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2
   printf("Recurse level %d\n", recurseLevel);
 
   if ( drawFloorRecurse != recurseLevel ) {
-    GLfloat xm = (x2 - x1) / 2.0;
-    if ( x1 > x2 ) {
-      xm = (x1 - x2) / 2.0;
-    }
-
-    drawSquare(recurseLevel + 1, x1, y1, xm, y2);
-    drawSquare(recurseLevel + 1, xm, y1, x2, y2);
+    GLfloat xm = (x1 + x2) / 2.0;
+    GLfloat ym = (y1 + y2) / 2.0;
+    int rnew = recurseLevel + 1;
+
+    // Split into four sub-quads
+    drawSquare(rnew, x1, y1, xm, ym);
+    drawSquare(rnew, x1, ym, xm, y2);
+    drawSquare(rnew, xm, ym, x2, y2);
+    drawSquare(rnew, xm, y1, x2, ym);
+    
   } else {
     printf("Drawing (%f, %f) -> (%f, %f)\n", x1, y2, x2, y2);
     glBegin(GL_QUADS);