From 901df212f75db8cf51349f53abeaed6ef62b61d3 Mon Sep 17 00:00:00 2001
From: Sven Gothel <sgothel@jausoft.com>
Date: Thu, 30 Mar 2023 04:18:56 +0200
Subject: GraphUI Shape.setTransform(..): Scale before rotate to preserve
 target-size in rotation

---
 .../classes/com/jogamp/graph/ui/gl/Shape.java      | 28 +++++++++++-----------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/src/graphui/classes/com/jogamp/graph/ui/gl/Shape.java b/src/graphui/classes/com/jogamp/graph/ui/gl/Shape.java
index 2d6f0950b..509479cc9 100644
--- a/src/graphui/classes/com/jogamp/graph/ui/gl/Shape.java
+++ b/src/graphui/classes/com/jogamp/graph/ui/gl/Shape.java
@@ -413,7 +413,7 @@ public abstract class Shape {
     /**
      * Setup the pre-selected {@link GLMatrixFunc#GL_MODELVIEW} {@link PMVMatrix} for this object.
      * - Scale shape from its center position
-     * - Rotate shape around optional pivot, see {@link #setRotationPivot(float[])}), otherwise rotate around its center (default)
+     * - Rotate shape around optional scaled pivot, see {@link #setRotationPivot(float[])}), otherwise rotate around its scaled center (default)
      * <p>
      * Shape's origin should be bottom-left @ 0/0 to have build-in drag-zoom work properly.
      * </p>
@@ -435,29 +435,29 @@ public abstract class Shape {
         if( sameScaleRotatePivot ) {
             // Scale shape from its center position and rotate around its center
             pmv.glTranslatef(ctr[0]*scale[0], ctr[1]*scale[1], ctr[2]*scale[2]); // add-back center, scaled
-            pmv.glScalef(scale[0], scale[1], scale[2]);
             pmv.glRotate(rotation);
+            pmv.glScalef(scale[0], scale[1], scale[2]);
             pmv.glTranslatef(-ctr[0], -ctr[1], -ctr[2]); // move to center
         } else if( hasRotate || hasScale ) {
-            if( hasScale ) {
-                // Scale shape from its center position
-                pmv.glTranslatef(ctr[0]*scale[0], ctr[1]*scale[1], ctr[2]*scale[2]); // add-back center, scaled
-                pmv.glScalef(scale[0], scale[1], scale[2]);
-                pmv.glTranslatef(-ctr[0], -ctr[1], -ctr[2]); // move to center
-            }
             if( hasRotate ) {
                 if( hasRotPivot ) {
-                    // Rotate shape around its pivot
-                    pmv.glTranslatef(rotPivot[0], rotPivot[1], rotPivot[2]); // pivot back from rot-pivot
+                    // Rotate shape around its scaled pivot
+                    pmv.glTranslatef(rotPivot[0]*scale[0], rotPivot[1]*scale[1], rotPivot[2]*scale[2]); // pivot back from rot-pivot, scaled
                     pmv.glRotate(rotation);
-                    pmv.glTranslatef(-rotPivot[0], -rotPivot[1], -rotPivot[2]); // pivot to rot-pivot
+                    pmv.glTranslatef(-rotPivot[0]*scale[0], -rotPivot[1]*scale[1], -rotPivot[2]*scale[2]); // pivot to rot-pivot, scaled
                 } else {
-                    // Rotate shape around its center
-                    pmv.glTranslatef(ctr[0], ctr[1], ctr[2]); // pivot back from center-pivot
+                    // Rotate shape around its scaled center
+                    pmv.glTranslatef(ctr[0]*scale[0], ctr[1]*scale[1], ctr[2]*scale[2]); // pivot back from center-pivot, scaled
                     pmv.glRotate(rotation);
-                    pmv.glTranslatef(-ctr[0], -ctr[1], -ctr[2]); // pivot to center-pivot
+                    pmv.glTranslatef(-ctr[0]*scale[0], -ctr[1]*scale[1], -ctr[2]*scale[2]); // pivot to center-pivot, scaled
                 }
             }
+            if( hasScale ) {
+                // Scale shape from its center position
+                pmv.glTranslatef(ctr[0]*scale[0], ctr[1]*scale[1], ctr[2]*scale[2]); // add-back center, scaled
+                pmv.glScalef(scale[0], scale[1], scale[2]);
+                pmv.glTranslatef(-ctr[0], -ctr[1], -ctr[2]); // move to center
+            }
         }
         // TODO: Add alignment features.
     }
-- 
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