X-Git-Url: https://git.ucc.asn.au/?p=atyndall%2Fcits2231.git;a=blobdiff_plain;f=scene.c;h=61c95af05498d0a22d68dc6bd989fe670e25fd6b;hp=7d5456fab079adcea1db91de6b8b74542e6b621d;hb=fcbdf0e38fcd0fed685405ff967feb8eb196c790;hpb=84a44257a71818d30cf2bbdea195a0b7d246aa83

diff --git a/scene.c b/scene.c
index 7d5456f..61c95af 100644
--- a/scene.c
+++ b/scene.c
@@ -199,6 +199,9 @@ void windowReshape(int w, int h) {
  * @param y Mouse y position
  */
 void mouse(int button, int state, int x, int y) {
+  if ( glutGetModifiers() == GLUT_ACTIVE_SHIFT ) {
+    button = GLUT_MIDDLE_BUTTON; // Holding shift is the same as the middle button
+  }
   switch(button) {
     case GLUT_LEFT_BUTTON:
     case GLUT_MIDDLE_BUTTON:
@@ -299,17 +302,22 @@ void motion(int x, int y) {
       break;
 
     case STATE_OBJECT_POSITION_SCALE:
-      //so.x, so.y, so.z
+     
       if ( buttonSelected == GLUT_LEFT_BUTTON ) {
         // w: left/right, h: near/far
+         //so.x, so.y, so.z
         //sceneObjs[curObject].x += (x - startx)*leftrightFactor;
       } else if ( buttonSelected == GLUT_MIDDLE_BUTTON ) {
         // w: big/small, h: up/down
-        float scaling = (y - starty);//*bigsmallFactor;
-        printf("Scaling by %f on all axii\n", scaling);
-        sceneObjs[curObject].scale[0] += scaling;
-        sceneObjs[curObject].scale[1] += scaling;
-        sceneObjs[curObject].scale[2] += scaling;
+
+        // For big/small scaling, we map negative numbers to 0->1 and positive numbers to 1->inf
+        float diff = (x - startx);
+        float max = (float)height/bigsmallFactor;
+        float scaling = ( diff + max) / max;
+
+        sceneObjs[curObject].scale[0] *= scaling;
+        sceneObjs[curObject].scale[1] *= scaling;
+        sceneObjs[curObject].scale[2] *= scaling;
       }
 
       startx = x;