X-Git-Url: https://git.ucc.asn.au/?p=atyndall%2Fcits2231.git;a=blobdiff_plain;f=scene.c;h=7a7875fe75271fb18a0715a4a6f10d08e3bed516;hp=e3004ee8d6450eb1e2966d9e8172a4911dcbbf9a;hb=336c0ba5151213006bd9537edef5d22368303519;hpb=4bce415af0e0be9392c2725a8fc4f9a3cc0fad11

diff --git a/scene.c b/scene.c
index e3004ee..7a7875f 100644
--- a/scene.c
+++ b/scene.c
@@ -132,6 +132,8 @@ GLfloat angle2 = 30;   /* in degrees */
 GLfloat near = -10;
 GLfloat far = 10;
 
+static float zoomFactor = 0.0;
+
 /**
  * Prints out error message when file cannot be read
  * @param fileName Name of file that could not be read
@@ -490,12 +492,15 @@ void windowReshape(int w, int h) {
   glViewport(0, 0, (GLsizei) w, (GLsizei) h);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
+  GLfloat x = 2.0f*(200 + 0.5)/w-1.0;
+  GLfloat y = 2.0f*(200 + 0.5)/h-1.0;
+  glTranslatef(-x,-y,0.0f);
   if (w <= h) 
-    glOrtho(near, far, near*(GLfloat)h/(GLfloat)w,
-             far*(GLfloat)h/(GLfloat)w, near, far);
+    glOrtho(zoomFactor*near, zoomFactor*far, zoomFactor*near*(GLfloat)h/(GLfloat)w,
+             zoomFactor*far*(GLfloat)h/(GLfloat)w, near, far);
   else
-    glOrtho(near*(GLfloat)w/(GLfloat)h,
-             far*(GLfloat)w/(GLfloat)h, near, far, near, far);
+    glOrtho(zoomFactor*near*(GLfloat)w/(GLfloat)h,
+             zoomFactor*far*(GLfloat)w/(GLfloat)h, zoomFactor*near, zoomFactor*far, near, far);
    glMatrixMode(GL_MODELVIEW); 
    glLoadIdentity();
 }