GraphUI Shape win<->obj/shape mapping: Return actual int[] or float[] result or null on error instead of boolean to easy API usage

8 files changed, 152 insertions, 120 deletions

diff --git a/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemo01.java b/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemo01.java
index ede9cd829..e580ded9a 100644
--- a/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemo01.java
+++ b/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemo01.java
@@ -204,10 +204,6 @@ public class UISceneDemo01 {
         scene.waitUntilDisplayed();
 
         final AABBox sceneBox = scene.getBounds();
-        final float[] surfaceSize = { 0f, 0f };
-        scene.surfaceToPlaneSize(scene.getViewport(), surfaceSize);
-
-        System.err.println("m1 scene "+surfaceSize[0]+" x "+surfaceSize[1]);
         System.err.println("m1 scene "+sceneBox);
         System.err.println("m1.0 "+shape);
         shape.scale(sceneBox.getWidth(), sceneBox.getWidth(), 1f); // scale shape to sceneBox
@@ -224,8 +220,8 @@ public class UISceneDemo01 {
         System.err.println("m2 ["+min+" .. "+max+"], step "+step);
         for(float x=min; x < max; x+=step) {
             shape.move(step, 0f, 0f);
-            final int[] glWinPos = new int[2];
-            if( shape.objToWinCoord(scene.getPMVMatrixSetup(), scene.getViewport(), shape.getBounds().getCenter(), new PMVMatrix(), glWinPos) ) {
+            final int[] glWinPos = shape.shapeToWinCoord(scene.getPMVMatrixSetup(), scene.getViewport(), shape.getBounds().getCenter(), new PMVMatrix(), new int[2]);
+            if( null != glWinPos ) {
                 window.warpPointer(glWinPos[0], window.getHeight() - glWinPos[1] - 1);
             }
             System.err.println("mm x "+x+", ["+min+" .. "+max+"], step "+step);
@@ -237,15 +233,13 @@ public class UISceneDemo01 {
     }
 
     static void testProject(final Scene scene, final Shape shape, final int glWinX, final int glWinY) {
-        final float[] objPos = new float[3];
-        final int[] glWinPos = new int[2];
         final PMVMatrix pmv = new PMVMatrix();
-        boolean ok = shape.winToObjCoord(scene.getPMVMatrixSetup(), scene.getViewport(), glWinX, glWinY, pmv, objPos);
-        System.err.printf("MM1: winToObjCoord: ok "+ok+", obj [%25.20ff, %25.20ff, %25.20ff]%n", objPos[0], objPos[1], objPos[2]);
-        ok = shape.objToWinCoord(scene.getPMVMatrixSetup(), scene.getViewport(), objPos, pmv, glWinPos);
+        final float[] objPos = shape.winToShapeCoord(scene.getPMVMatrixSetup(), scene.getViewport(), glWinX, glWinY, pmv, new float[3]);
+        System.err.printf("MM1: winToObjCoord: obj [%25.20ff, %25.20ff, %25.20ff]%n", objPos[0], objPos[1], objPos[2]);
+        final int[] glWinPos = shape.shapeToWinCoord(scene.getPMVMatrixSetup(), scene.getViewport(), objPos, pmv, new int[2]);
         final int windx = glWinPos[0]-glWinX;
         final int windy = glWinPos[1]-glWinY;
-        System.err.printf("MM2: objToWinCoord: ok "+ok+", winCoords %d / %d, diff %d x %d%n", glWinPos[0], glWinPos[1], windx, windy);
+        System.err.printf("MM2: objToWinCoord: winCoords %d / %d, diff %d x %d%n", glWinPos[0], glWinPos[1], windx, windy);
     }
 
     @SuppressWarnings("unused")
diff --git a/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemo02.java b/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemo02.java
index 2bcc3a536..4655b773c 100644
--- a/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemo02.java
+++ b/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemo02.java
@@ -190,9 +190,8 @@ public class UISceneDemo02 implements GLEventListener {
         for(float x=0; x < max; x+=step) {
             demo.shape.move(-step, 0f, 0f);
             // System.err.println(demo.shape);
-            final int[] glWinPos = new int[2];
-            final boolean ok = demo.shape.objToWinCoord(scene.getPMVMatrixSetup(), scene.getViewport(), demo.shape.getBounds().getCenter(), new PMVMatrix(), glWinPos);
-            System.err.printf("m3: objToWinCoord: ok "+ok+", winCoords %d / %d%n", glWinPos[0], glWinPos[1]);
+            final int[] glWinPos = demo.shape.shapeToWinCoord(scene.getPMVMatrixSetup(), scene.getViewport(), demo.shape.getBounds().getCenter(), new PMVMatrix(), new int[2]);
+            System.err.printf("m3: objToWinCoord: winCoords %d / %d%n", glWinPos[0], glWinPos[1]);
             // demo.testProject(glWinPos[0], glWinPos[1]);
             window.warpPointer(glWinPos[0], window.getHeight() - glWinPos[1] - 1);
             System.err.println("mm x "+x+", [0 .. "+max+"], step "+step+", "+box);
@@ -200,26 +199,23 @@ public class UISceneDemo02 implements GLEventListener {
         }
     }
     void testProject() {
-        final int[] glWinPos = new int[2];
-        final boolean ok = shape.objToWinCoord(scene.getPMVMatrixSetup(), scene.getViewport(), shape.getBounds().getCenter(), new PMVMatrix(), glWinPos);
-        System.err.printf("m4: objToWinCoord: ok "+ok+", winCoords %d / %d%n", glWinPos[0], glWinPos[1]);
+        final int[] glWinPos = shape.shapeToWinCoord(scene.getPMVMatrixSetup(), scene.getViewport(), shape.getBounds().getCenter(), new PMVMatrix(), new int[2]);
+        System.err.printf("m4: objToWinCoord: winCoords %d / %d%n", glWinPos[0], glWinPos[1]);
         testProject(glWinPos[0], glWinPos[1]);
     }
     void testProject(final int glWinX, final int glWinY) {
-        final float[] objPos = new float[3];
-        final int[] glWinPos = new int[2];
         final PMVMatrix pmv = new PMVMatrix();
-        boolean ok = shape.winToObjCoord(scene.getPMVMatrixSetup(), scene.getViewport(), glWinX, glWinY, pmv, objPos);
-        System.err.printf("m5: winToObjCoord: ok "+ok+", obj [%25.20ff, %25.20ff, %25.20ff]%n", objPos[0], objPos[1], objPos[2]);
-        ok = shape.objToWinCoord(scene.getPMVMatrixSetup(), scene.getViewport(), objPos, pmv, glWinPos);
+        final float[] objPos = shape.winToShapeCoord(scene.getPMVMatrixSetup(), scene.getViewport(), glWinX, glWinY, pmv, new float[3]);
+        System.err.printf("m5: winToObjCoord: obj [%25.20ff, %25.20ff, %25.20ff]%n", objPos[0], objPos[1], objPos[2]);
+        final int[] glWinPos = shape.shapeToWinCoord(scene.getPMVMatrixSetup(), scene.getViewport(), objPos, pmv, new int[2]);
         final int windx = glWinPos[0]-glWinX;
         final int windy = glWinPos[1]-glWinY;
         if( windx > 10 || windy > 10 ) {
-            System.err.printf("XX: objToWinCoord: ok "+ok+", winCoords %d / %d, diff %d x %d%n", glWinPos[0], glWinPos[1], windx, windy);
+            System.err.printf("XX: objToWinCoord: winCoords %d / %d, diff %d x %d%n", glWinPos[0], glWinPos[1], windx, windy);
             // Thread.dumpStack();
             // System.exit(-1);
         } else {
-            System.err.printf("m6: objToWinCoord: ok "+ok+", winCoords %d / %d, diff %d x %d%n", glWinPos[0], glWinPos[1], windx, windy);
+            System.err.printf("m6: objToWinCoord: winCoords %d / %d, diff %d x %d%n", glWinPos[0], glWinPos[1], windx, windy);
         }
     }
 
@@ -350,13 +346,11 @@ public class UISceneDemo02 implements GLEventListener {
                 pmv.glPushMatrix();
                 s.setTransform(pmv);
 
-                final float[] objPos = new float[3];
-                boolean ok = s.winToObjCoord(pmv, viewport, glWinX, glWinY, objPos);
-                System.err.println("Button: Click: win["+glWinX+", "+glWinY+"] -> ok "+ok+", obj["+objPos[0]+", "+objPos[1]+", "+objPos[1]+"]");
+                final float[] objPos = s.winToShapeCoord(pmv, viewport, glWinX, glWinY, new float[3]);
+                System.err.println("Button: Click: win["+glWinX+", "+glWinY+"] -> obj["+objPos[0]+", "+objPos[1]+", "+objPos[1]+"]");
 
-                final int[] surfaceSize = new int[2];
-                ok = s.getSurfaceSize(pmv, viewport, surfaceSize);
-                System.err.println("Button: Size: ok "+ok+", pixel "+surfaceSize[0]+" x "+surfaceSize[1]);
+                final int[] surfaceSize = s.getSurfaceSize(pmv, viewport, new int[2]);
+                System.err.println("Button: Size: pixel "+surfaceSize[0]+" x "+surfaceSize[1]);
 
                 pmv.glPopMatrix();
             }
@@ -420,12 +414,11 @@ public class UISceneDemo02 implements GLEventListener {
             pmv.glPushMatrix();
             shape.setTransform(pmv);
 
-            final int[] winPosSize = { 0, 0 };
             System.err.println("draw.0: "+shape);
-            boolean ok = shape.getSurfaceSize(pmv, renderer.getViewport(), winPosSize);
-            System.err.println("draw.1: ok "+ok+", surfaceSize "+winPosSize[0]+" x "+winPosSize[1]);
-            ok = shape.objToWinCoord(pmv, renderer.getViewport(), shape.getPosition(), winPosSize);
-            System.err.println("draw.2: ok "+ok+",    winCoord "+winPosSize[0]+" x "+winPosSize[1]);
+            final int[] winSize = shape.getSurfaceSize(pmv, renderer.getViewport(), new int[2]);
+            System.err.println("draw.1: surfaceSize "+winSize[0]+" x "+winSize[1]);
+            final int[] winPos = shape.shapeToWinCoord(pmv, renderer.getViewport(), shape.getPosition(), new int[2]);
+            System.err.println("draw.2: winCoord "+winPos[0]+" x "+winPos[1]);
 
             pmv.glPopMatrix();
         }
diff --git a/src/demos/com/jogamp/opengl/demos/graph/ui/UIShapeDemo01.java b/src/demos/com/jogamp/opengl/demos/graph/ui/UIShapeDemo01.java
index 4d6b85bbd..b1eca9b20 100644
--- a/src/demos/com/jogamp/opengl/demos/graph/ui/UIShapeDemo01.java
+++ b/src/demos/com/jogamp/opengl/demos/graph/ui/UIShapeDemo01.java
@@ -104,10 +104,6 @@ public class UIShapeDemo01 implements GLEventListener {
         final GLProfile glp = GLProfile.getGL2ES2();
         final GLCapabilities caps = new GLCapabilities(glp);
         caps.setAlphaBits(4);
-        if( false ) {
-            caps.setSampleBuffers(true);
-            caps.setNumSamples(4);
-        }
         System.out.println("Requested: " + caps);
 
         final int renderModes = Region.COLORCHANNEL_RENDERING_BIT | Region.VBAA_RENDERING_BIT;
@@ -248,12 +244,11 @@ public class UIShapeDemo01 implements GLEventListener {
         shape.setTransform(pmv);
         shape.draw(gl, renderer, sampleCount);
         if( once ) {
-            final int[] winPosSize = { 0, 0 };
             System.err.println("draw.0: "+shape);
-            boolean ok = shape.getSurfaceSize(pmv, renderer.getViewport(), winPosSize);
-            System.err.println("draw.1: ok "+ok+", surfaceSize "+winPosSize[0]+" x "+winPosSize[1]);
-            ok = shape.objToWinCoord(pmv, renderer.getViewport(), shape.getPosition(), winPosSize);
-            System.err.println("draw.2: ok "+ok+",    winCoord "+winPosSize[0]+" x "+winPosSize[1]);
+            final int[] winSize = shape.getSurfaceSize(pmv, renderer.getViewport(), new int[2]);
+            System.err.println("draw.1: surfaceSize "+winSize[0]+" x "+winSize[1]);
+            final int[] winPos = shape.shapeToWinCoord(pmv, renderer.getViewport(), shape.getPosition(), new int[2]);
+            System.err.println("draw.2: winCoord "+winPos[0]+" x "+winPos[1]);
         }
         pmv.glPopMatrix();
     }
@@ -405,14 +400,16 @@ public class UIShapeDemo01 implements GLEventListener {
                         pmv.glPushMatrix();
                         button.setTransform(pmv);
 
-                        final float[] objPos = new float[3];
                         System.err.println("\n\nButton: "+button);
-                        button.winToObjCoord(pmv, viewport, glWinX, glWinY, objPos);
-                        System.err.println("Button: Click: Win "+glWinX+"/"+glWinY+" -> Obj "+objPos[0]+"/"+objPos[1]+"/"+objPos[1]);
+                        final float[] objPos = button.winToShapeCoord(pmv, viewport, glWinX, glWinY, new float[3]);
+                        if( null != objPos ) {
+                            System.err.println("Button: Click: Win "+glWinX+"/"+glWinY+" -> Obj "+objPos[0]+"/"+objPos[1]+"/"+objPos[1]);
+                        }
 
-                        final int[] surfaceSize = new int[2];
-                        button.getSurfaceSize(pmv, viewport, surfaceSize);
-                        System.err.println("Button: Size: Pixel "+surfaceSize[0]+" x "+surfaceSize[1]);
+                        final int[] surfaceSize = button.getSurfaceSize(pmv, viewport, new int[2]);
+                        if( null != surfaceSize ) {
+                            System.err.println("Button: Size: Pixel "+surfaceSize[0]+" x "+surfaceSize[1]);
+                        }
 
                         pmv.glPopMatrix();
                     }
@@ -421,18 +418,15 @@ public class UIShapeDemo01 implements GLEventListener {
                         crossHair.setTransform(pmv);
 
                         final float[] objPosC = crossHair.getBounds().getCenter();
-                        final int[] objWinPos = new int[2];
                         System.err.println("\n\nCrossHair: "+crossHair);
-                        if( crossHair.objToWinCoord(pmv, viewport, objPosC, objWinPos) ) {
-                            System.err.println("CrossHair: Obj: Obj "+objPosC[0]+"/"+objPosC[1]+"/"+objPosC[1]+" -> Win "+objWinPos[0]+"/"+objWinPos[1]);
-                        }
+                        final int[] objWinPos = crossHair.shapeToWinCoord(pmv, viewport, objPosC, new int[2]);
+                        System.err.println("CrossHair: Obj: Obj "+objPosC[0]+"/"+objPosC[1]+"/"+objPosC[1]+" -> Win "+objWinPos[0]+"/"+objWinPos[1]);
 
-                        final float[] objPos2 = new float[3];
-                        crossHair.winToObjCoord(pmv, viewport, objWinPos[0], objWinPos[1], objPos2);
+                        final float[] objPos2 = crossHair.winToShapeCoord(pmv, viewport, objWinPos[0], objWinPos[1], new float[3]);
                         System.err.println("CrossHair: Obj: Win "+objWinPos[0]+"/"+objWinPos[1]+" -> Obj "+objPos2[0]+"/"+objPos2[1]+"/"+objPos2[1]);
 
-                        final float[] winObjPos = new float[3];
-                        if( crossHair.winToObjCoord(pmv, viewport, glWinX, glWinY, winObjPos) ) {
+                        final float[] winObjPos = crossHair.winToShapeCoord(pmv, viewport, glWinX, glWinY, new float[3]);
+                        if( null != winObjPos ) {
                             // final float[] translate = crossHair.getTranslate();
                             // final float[] objPosT = new float[] { objPosC[0]+translate[0], objPosC[1]+translate[1], objPosC[2]+translate[2] };
                             final float dx = winObjPos[0] - objPosC[0];
@@ -446,8 +440,7 @@ public class UIShapeDemo01 implements GLEventListener {
                             }
                         }
 
-                        final int[] surfaceSize = new int[2];
-                        crossHair.getSurfaceSize(pmv, viewport, surfaceSize);
+                        final int[] surfaceSize = crossHair.getSurfaceSize(pmv, viewport, new int[2]);
                         System.err.println("CrossHair: Size: Pixel "+surfaceSize[0]+" x "+surfaceSize[1]);
 
                         pmv.glPopMatrix();
diff --git a/src/demos/com/jogamp/opengl/demos/graph/ui/UITypeDemo01.java b/src/demos/com/jogamp/opengl/demos/graph/ui/UITypeDemo01.java
index 08cde27c9..816c9929d 100644
--- a/src/demos/com/jogamp/opengl/demos/graph/ui/UITypeDemo01.java
+++ b/src/demos/com/jogamp/opengl/demos/graph/ui/UITypeDemo01.java
@@ -119,10 +119,6 @@ public class UITypeDemo01 implements GLEventListener {
         final GLProfile glp = GLProfile.getGL2ES2();
         final GLCapabilities caps = new GLCapabilities(glp);
         caps.setAlphaBits(4);
-        if( false ) {
-            caps.setSampleBuffers(true);
-            caps.setNumSamples(4);
-        }
         System.out.println("Requested: " + caps);
 
         final int renderModes = Region.COLORCHANNEL_RENDERING_BIT | Region.VBAA_RENDERING_BIT;
@@ -477,18 +473,15 @@ public class UITypeDemo01 implements GLEventListener {
                         crossHair.setTransform(pmv);
 
                         final float[] objPosC = crossHair.getBounds().getCenter();
-                        final int[] objWinPos = new int[2];
                         System.err.println("\n\nCrossHair: "+crossHair);
-                        if( crossHair.objToWinCoord(pmv, viewport, objPosC, objWinPos) ) {
-                            System.err.println("CrossHair: Obj: Obj "+objPosC[0]+"/"+objPosC[1]+"/"+objPosC[1]+" -> Win "+objWinPos[0]+"/"+objWinPos[1]);
-                        }
+                        final int[] objWinPos = crossHair.shapeToWinCoord(pmv, viewport, objPosC, new int[2]);
+                        System.err.println("CrossHair: Obj: Obj "+objPosC[0]+"/"+objPosC[1]+"/"+objPosC[1]+" -> Win "+objWinPos[0]+"/"+objWinPos[1]);
 
-                        final float[] objPos2 = new float[3];
-                        crossHair.winToObjCoord(pmv, viewport, objWinPos[0], objWinPos[1], objPos2);
+                        final float[] objPos2 = crossHair.winToShapeCoord(pmv, viewport, objWinPos[0], objWinPos[1], new float[3]);
                         System.err.println("CrossHair: Obj: Win "+objWinPos[0]+"/"+objWinPos[1]+" -> Obj "+objPos2[0]+"/"+objPos2[1]+"/"+objPos2[1]);
 
-                        final float[] winObjPos = new float[3];
-                        if( crossHair.winToObjCoord(pmv, viewport, glWinX, glWinY, winObjPos) ) {
+                        final float[] winObjPos = crossHair.winToShapeCoord(pmv, viewport, glWinX, glWinY, new float[3]);
+                        if( null != winObjPos ) {
                             // final float[] translate = crossHair.getTranslate();
                             // final float[] objPosT = new float[] { objPosC[0]+translate[0], objPosC[1]+translate[1], objPosC[2]+translate[2] };
                             final float dx = winObjPos[0] - objPosC[0];
@@ -502,8 +495,7 @@ public class UITypeDemo01 implements GLEventListener {
                             }
                         }
 
-                        final int[] surfaceSize = new int[2];
-                        crossHair.getSurfaceSize(pmv, viewport, surfaceSize);
+                        final int[] surfaceSize = crossHair.getSurfaceSize(pmv, viewport, new int[2]);
                         System.err.println("CrossHair: Size: Pixel "+surfaceSize[0]+" x "+surfaceSize[1]);
 
                         pmv.glPopMatrix();
diff --git a/src/graphui/classes/com/jogamp/graph/ui/gl/Scene.java b/src/graphui/classes/com/jogamp/graph/ui/gl/Scene.java
index 7e98df635..204777fde 100644
--- a/src/graphui/classes/com/jogamp/graph/ui/gl/Scene.java
+++ b/src/graphui/classes/com/jogamp/graph/ui/gl/Scene.java
@@ -433,10 +433,11 @@ public final class Scene implements GLEventListener {
                     final PMVMatrix pmv = renderer.getMatrix();
                     pmv.glPushMatrix();
                     s.setTransform(pmv);
-                    shape[0].winToObjCoord(getMatrix(), getViewport(), glWinX, glWinY, objPos);
+                    final boolean ok = null != shape[0].winToShapeCoord(getMatrix(), getViewport(), glWinX, glWinY, objPos);
                     pmv.glPopMatrix();
-
-                    runnable.run();
+                    if( ok ) {
+                        runnable.run();
+                    }
                 }
                 return false; // needs to re-render to wash away our false-color glSelect
             } } );
@@ -482,7 +483,7 @@ public final class Scene implements GLEventListener {
     }
 
     /**
-     * Calling {@link Shape#winToObjCoord(Scene, int, int, float[])}, retrieving its object position.
+     * Calling {@link Shape#winToObjCoord(Scene, int, int, float[])}, retrieving its Shape object position.
      * @param shape
      * @param glWinX in GL window coordinates, origin bottom-left
      * @param glWinY in GL window coordinates, origin bottom-left
@@ -491,8 +492,8 @@ public final class Scene implements GLEventListener {
      * @param objPos resulting object position
      * @param runnable action
      */
-    public void winToObjCoord(final Shape shape, final int glWinX, final int glWinY, final PMVMatrix pmv, final float[] objPos, final Runnable runnable) {
-        if( null != shape && shape.winToObjCoord(pmvMatrixSetup, renderer.getViewport(), glWinX, glWinY, pmv, objPos) ) {
+    public void winToShapeCoord(final Shape shape, final int glWinX, final int glWinY, final PMVMatrix pmv, final float[] objPos, final Runnable runnable) {
+        if( null != shape && null != shape.winToShapeCoord(pmvMatrixSetup, renderer.getViewport(), glWinX, glWinY, pmv, objPos) ) {
             runnable.run();
         }
     }
@@ -732,7 +733,7 @@ public final class Scene implements GLEventListener {
                     final PMVMatrix pmv = new PMVMatrix();
                     final float[] objPos = new float[3];
                     final Shape shape = activeShape;
-                    winToObjCoord(shape, glWinX, glWinY, pmv, objPos, () -> {
+                    winToShapeCoord(shape, glWinX, glWinY, pmv, objPos, () -> {
                         shape.dispatchGestureEvent(gh, glWinX, glWinY, pmv, renderer.getViewport(), objPos);
                     });
                 }
@@ -781,7 +782,7 @@ public final class Scene implements GLEventListener {
     final void dispatchMouseEventForShape(final Shape shape, final MouseEvent e, final int glWinX, final int glWinY) {
         final PMVMatrix pmv = new PMVMatrix();
         final float[] objPos = new float[3];
-        winToObjCoord(shape, glWinX, glWinY, pmv, objPos, () -> { shape.dispatchMouseEvent(e, glWinX, glWinY, objPos); });
+        winToShapeCoord(shape, glWinX, glWinY, pmv, objPos, () -> { shape.dispatchMouseEvent(e, glWinX, glWinY, objPos); });
     }
 
     private class SBCMouseListener implements MouseListener {
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 940e37a3b..089348476 100644
--- a/src/graphui/classes/com/jogamp/graph/ui/gl/Shape.java
+++ b/src/graphui/classes/com/jogamp/graph/ui/gl/Shape.java
@@ -428,11 +428,11 @@ public abstract class Shape {
      * @param pmv well formed {@link PMVMatrix}, e.g. could have been setup via {@link Scene#setupMatrix(PMVMatrix) setupMatrix(..)} and {@link #setTransform(PMVMatrix)}.
      * @param viewport the int[4] viewport
      * @param surfaceSize int[2] target surface size
-     * @return true for successful gluProject(..) operation, otherwise false
+     * @return given int[2] {@code surfaceSize} for successful gluProject(..) operation, otherwise {@code null}
      * @see #getSurfaceSize(com.jogamp.graph.ui.gl.Scene.PMVMatrixSetup, int[], PMVMatrix, int[])
+     * @see #getSurfaceSize(Scene, PMVMatrix, int[])
      */
-    public boolean getSurfaceSize(final PMVMatrix pmv, final int[/*4*/] viewport, final int[/*2*/] surfaceSize) {
-        boolean res = false;
+    public int[/*2*/] getSurfaceSize(final PMVMatrix pmv, final int[/*4*/] viewport, final int[/*2*/] surfaceSize) {
         // System.err.println("Shape::getSurfaceSize.VP "+viewport[0]+"/"+viewport[1]+" "+viewport[2]+"x"+viewport[3]);
         final float[] winCoordHigh = new float[3];
         final float[] winCoordLow = new float[3];
@@ -446,10 +446,10 @@ public abstract class Shape {
                 surfaceSize[0] = (int)(winCoordHigh[0] - winCoordLow[0]);
                 surfaceSize[1] = (int)(winCoordHigh[1] - winCoordLow[1]);
                 // System.err.printf("Shape::surfaceSize.S: shape %d: %f x %f -> %d x %d%n", getName(), winCoordHigh[0] - winCoordLow[0], winCoordHigh[1] - winCoordLow[1], surfaceSize[0], surfaceSize[1]);
-                res = true;
+                return surfaceSize;
             }
         }
-        return res;
+        return null;
     }
 
     /**
@@ -463,15 +463,33 @@ public abstract class Shape {
      * @param pmv a new {@link PMVMatrix} which will {@link Scene.PMVMatrixSetup#set(PMVMatrix, int, int, int, int) be setup},
      *            {@link #setTransform(PMVMatrix) shape-transformed} and can be reused by the caller.
      * @param surfaceSize int[2] target surface size
-     * @return true for successful gluProject(..) operation, otherwise false
+     * @return given int[2] {@code surfaceSize} for successful gluProject(..) operation, otherwise {@code null}
      * @see #getSurfaceSize(PMVMatrix, int[], int[])
+     * @see #getSurfaceSize(Scene, PMVMatrix, int[])
      */
-    public boolean getSurfaceSize(final Scene.PMVMatrixSetup pmvMatrixSetup, final int[/*4*/] viewport, final PMVMatrix pmv, final int[/*2*/] surfaceSize) {
+    public int[/*2*/] getSurfaceSize(final Scene.PMVMatrixSetup pmvMatrixSetup, final int[/*4*/] viewport, final PMVMatrix pmv, final int[/*2*/] surfaceSize) {
         pmvMatrixSetup.set(pmv, viewport[0], viewport[1], viewport[2], viewport[3]);
         setTransform(pmv);
         return getSurfaceSize(pmv, viewport, surfaceSize);
     }
 
+    /**
+     * Retrieve surface (view) size of this shape.
+     * <p>
+     * The given {@link PMVMatrix} will be {@link Scene.PMVMatrixSetup#set(PMVMatrix, int, int, int, int) setup} properly for this shape
+     * including this shape's {@link #setTransform(PMVMatrix)}.
+     * </p>
+     * @param scene {@link Scene} to retrieve {@link Scene.PMVMatrixSetup} and the viewport.
+     * @param pmv a new {@link PMVMatrix} which will {@link Scene.PMVMatrixSetup#set(PMVMatrix, int, int, int, int) be setup},
+     *            {@link #setTransform(PMVMatrix) shape-transformed} and can be reused by the caller.
+     * @param surfaceSize int[2] target surface size
+     * @return given int[2] {@code surfaceSize} for successful gluProject(..) operation, otherwise {@code null}
+     * @see #getSurfaceSize(PMVMatrix, int[], int[])
+     * @see #getSurfaceSize(com.jogamp.graph.ui.gl.Scene.PMVMatrixSetup, int[], PMVMatrix, int[])
+     */
+    public int[/*2*/] getSurfaceSize(final Scene scene, final PMVMatrix pmv, final int[/*2*/] surfaceSize) {
+        return getSurfaceSize(scene.getPMVMatrixSetup(), scene.getViewport(), pmv, surfaceSize);
+    }
 
     /**
      * Map given object coordinate relative to this shape to window coordinates.
@@ -484,11 +502,11 @@ public abstract class Shape {
      * @param viewport the int[4] viewport
      * @param objPos float[3] object position relative to this shape's center
      * @param glWinPos int[2] target window position of objPos relative to this shape
-     * @return true for successful gluProject(..) operation, otherwise false
-     * @see #objToWinCoord(com.jogamp.graph.ui.gl.Scene.PMVMatrixSetup, int[], float[], PMVMatrix, int[])
+     * @return given int[2] {@code glWinPos} for successful gluProject(..) operation, otherwise {@code null}
+     * @see #shapeToWinCoord(com.jogamp.graph.ui.gl.Scene.PMVMatrixSetup, int[], float[], PMVMatrix, int[])
+     * @see #shapeToWinCoord(Scene, float[], PMVMatrix, int[])
      */
-    public boolean objToWinCoord(final PMVMatrix pmv, final int[/*4*/] viewport, final float[/*3*/] objPos, final int[/*2*/] glWinPos) {
-        boolean res = false;
+    public int[/*2*/] shapeToWinCoord(final PMVMatrix pmv, final int[/*4*/] viewport, final float[/*3*/] objPos, final int[/*2*/] glWinPos) {
         // System.err.println("Shape::objToWinCoordgetSurfaceSize.VP "+viewport[0]+"/"+viewport[1]+" "+viewport[2]+"x"+viewport[3]);
         final float[] winCoord = new float[3];
 
@@ -497,9 +515,9 @@ public abstract class Shape {
             glWinPos[0] = (int)(winCoord[0]);
             glWinPos[1] = (int)(winCoord[1]);
             // System.err.printf("Shape::objToWinCoord.X: shape %d: %f / %f -> %d / %d%n", getName(), winCoord[0], winCoord[1], glWinPos[0], glWinPos[1]);
-            res = true;
+            return glWinPos;
         }
-        return res;
+        return null;
     }
 
     /**
@@ -514,13 +532,33 @@ public abstract class Shape {
      * @param pmv a new {@link PMVMatrix} which will {@link Scene.PMVMatrixSetup#set(PMVMatrix, int, int, int, int) be setup},
      *            {@link #setTransform(PMVMatrix) shape-transformed} and can be reused by the caller.
      * @param glWinPos int[2] target window position of objPos relative to this shape
-     * @return true for successful gluProject(..) operation, otherwise false
-     * @see #objToWinCoord(PMVMatrix, int[], float[], int[])
+     * @return given int[2] {@code glWinPos} for successful gluProject(..) operation, otherwise {@code null}
+     * @see #shapeToWinCoord(PMVMatrix, int[], float[], int[])
+     * @see #shapeToWinCoord(Scene, float[], PMVMatrix, int[])
      */
-    public boolean objToWinCoord(final Scene.PMVMatrixSetup pmvMatrixSetup, final int[/*4*/] viewport, final float[/*3*/] objPos, final PMVMatrix pmv, final int[/*2*/] glWinPos) {
+    public int[/*2*/] shapeToWinCoord(final Scene.PMVMatrixSetup pmvMatrixSetup, final int[/*4*/] viewport, final float[/*3*/] objPos, final PMVMatrix pmv, final int[/*2*/] glWinPos) {
         pmvMatrixSetup.set(pmv, viewport[0], viewport[1], viewport[2], viewport[3]);
         setTransform(pmv);
-        return this.objToWinCoord(pmv, viewport, objPos, glWinPos);
+        return this.shapeToWinCoord(pmv, viewport, objPos, glWinPos);
+    }
+
+    /**
+     * Map given object coordinate relative to this shape to window coordinates.
+     * <p>
+     * The given {@link PMVMatrix} will be {@link Scene.PMVMatrixSetup#set(PMVMatrix, int, int, int, int) setup} properly for this shape
+     * including this shape's {@link #setTransform(PMVMatrix)}.
+     * </p>
+     * @param scene {@link Scene} to retrieve {@link Scene.PMVMatrixSetup} and the viewport.
+     * @param objPos float[3] object position relative to this shape's center
+     * @param pmv a new {@link PMVMatrix} which will {@link Scene.PMVMatrixSetup#set(PMVMatrix, int, int, int, int) be setup},
+     *            {@link #setTransform(PMVMatrix) shape-transformed} and can be reused by the caller.
+     * @param glWinPos int[2] target window position of objPos relative to this shape
+     * @return given int[2] {@code glWinPos} for successful gluProject(..) operation, otherwise {@code null}
+     * @see #shapeToWinCoord(PMVMatrix, int[], float[], int[])
+     * @see #shapeToWinCoord(com.jogamp.graph.ui.gl.Scene.PMVMatrixSetup, int[], float[], PMVMatrix, int[])
+     */
+    public int[/*2*/] shapeToWinCoord(final Scene scene, final float[/*3*/] objPos, final PMVMatrix pmv, final int[/*2*/] glWinPos) {
+        return this.shapeToWinCoord(scene.getPMVMatrixSetup(), scene.getViewport(), objPos, pmv, glWinPos);
     }
 
     /**
@@ -535,11 +573,11 @@ public abstract class Shape {
      * @param glWinX in GL window coordinates, origin bottom-left
      * @param glWinY in GL window coordinates, origin bottom-left
      * @param objPos float[3] target object position of glWinX/glWinY relative to this shape
-     * @return true for successful gluProject(..) and gluUnProject(..) operations, otherwise false
-     * @see #winToObjCoord(com.jogamp.graph.ui.gl.Scene.PMVMatrixSetup, int[], int, int, PMVMatrix, float[])
+     * @return given float[3] {@code objPos} for successful gluProject(..) and gluUnProject(..) operation, otherwise {@code null}
+     * @see #winToShapeCoord(com.jogamp.graph.ui.gl.Scene.PMVMatrixSetup, int[], int, int, PMVMatrix, float[])
+     * @see #winToShapeCoord(Scene, int, int, PMVMatrix, float[])
      */
-    public boolean winToObjCoord(final PMVMatrix pmv, final int[/*4*/] viewport, final int glWinX, final int glWinY, final float[/*3*/] objPos) {
-        boolean res = false;
+    public float[/*3*/] winToShapeCoord(final PMVMatrix pmv, final int[/*4*/] viewport, final int glWinX, final int glWinY, final float[/*3*/] objPos) {
         final float[] ctr = getBounds().getCenter();
         final float[] tmp = new float[3];
 
@@ -547,10 +585,10 @@ public abstract class Shape {
             // System.err.printf("Shape::winToObjCoord.0: shape %d: obj [%15.10ff, %15.10ff, %15.10ff] -> win [%d / %d -> %7.2ff, %7.2ff, %7.2ff, diff %7.2ff x %7.2ff]%n", getName(), ctr[0], ctr[1], ctr[2], glWinX, glWinY, tmp[0], tmp[1], tmp[2], glWinX-tmp[0], glWinY-tmp[1]);
             if( pmv.gluUnProject(glWinX, glWinY, tmp[2], viewport, 0, objPos, 0) ) {
                 // System.err.printf("Shape::winToObjCoord.X: shape %d: win [%d, %d, %7.2ff] -> obj [%15.10ff, %15.10ff, %15.10ff]%n", getName(), glWinX, glWinY, tmp[2], objPos[0], objPos[1], objPos[2]);
-                res = true;
+                return objPos;
             }
         }
-        return res;
+        return null;
     }
 
     /**
@@ -561,19 +599,39 @@ public abstract class Shape {
      * </p>
      * @param pmvMatrixSetup {@link Scene.PMVMatrixSetup} to {@link Scene.PMVMatrixSetup#set(PMVMatrix, int, int, int, int) setup} given {@link PMVMatrix} {@code pmv}.
      * @param viewport used viewport for {@link PMVMatrix#gluUnProject(float, float, float, int[], int, float[], int)}
-     * @param scene {@link Scene} source of viewport and local {@link PMVMatrix} {@link Scene#setupMatrix(PMVMatrix) setupMatrix(..)}.
      * @param glWinX in GL window coordinates, origin bottom-left
      * @param glWinY in GL window coordinates, origin bottom-left
      * @param pmv a new {@link PMVMatrix} which will {@link Scene.PMVMatrixSetup#set(PMVMatrix, int, int, int, int) be setup},
      *            {@link #setTransform(PMVMatrix) shape-transformed} and can be reused by the caller.
      * @param objPos float[3] target object position of glWinX/glWinY relative to this shape
-     * @return true for successful gluProject(..) and gluUnProject(..) operations, otherwise false
-     * @see #winToObjCoord(PMVMatrix, int[], int, int, float[])
+     * @return given float[3] {@code objPos} for successful gluProject(..) and gluUnProject(..) operation, otherwise {@code null}
+     * @see #winToShapeCoord(PMVMatrix, int[], int, int, float[])
+     * @see #winToShapeCoord(Scene, int, int, PMVMatrix, float[])
      */
-    public boolean winToObjCoord(final Scene.PMVMatrixSetup pmvMatrixSetup, final int[/*4*/] viewport, final int glWinX, final int glWinY, final PMVMatrix pmv, final float[/*3*/] objPos) {
+    public float[/*3*/] winToShapeCoord(final Scene.PMVMatrixSetup pmvMatrixSetup, final int[/*4*/] viewport, final int glWinX, final int glWinY, final PMVMatrix pmv, final float[/*3*/] objPos) {
         pmvMatrixSetup.set(pmv, viewport[0], viewport[1], viewport[2], viewport[3]);
         setTransform(pmv);
-        return this.winToObjCoord(pmv, viewport, glWinX, glWinY, objPos);
+        return this.winToShapeCoord(pmv, viewport, glWinX, glWinY, objPos);
+    }
+
+    /**
+     * Map given gl-window-coordinates to object coordinates relative to this shape and its z-coordinate.
+     * <p>
+     * The given {@link PMVMatrix} will be {@link Scene.PMVMatrixSetup#set(PMVMatrix, int, int, int, int) setup} properly for this shape
+     * including this shape's {@link #setTransform(PMVMatrix)}.
+     * </p>
+     * @param scene {@link Scene} to retrieve {@link Scene.PMVMatrixSetup} and the viewport.
+     * @param glWinX in GL window coordinates, origin bottom-left
+     * @param glWinY in GL window coordinates, origin bottom-left
+     * @param pmv a new {@link PMVMatrix} which will {@link Scene.PMVMatrixSetup#set(PMVMatrix, int, int, int, int) be setup},
+     *            {@link #setTransform(PMVMatrix) shape-transformed} and can be reused by the caller.
+     * @param objPos float[3] target object position of glWinX/glWinY relative to this shape
+     * @return given float[3] {@code objPos} for successful gluProject(..) and gluUnProject(..) operation, otherwise {@code null}
+     * @see #winToShapeCoord(PMVMatrix, int[], int, int, float[])
+     * @see #winToShapeCoord(com.jogamp.graph.ui.gl.Scene.PMVMatrixSetup, int[], int, int, PMVMatrix, float[])
+     */
+    public float[/*3*/] winToShapeCoord(final Scene scene, final int glWinX, final int glWinY, final PMVMatrix pmv, final float[/*3*/] objPos) {
+        return this.winToShapeCoord(scene.getPMVMatrixSetup(), scene.getViewport(), glWinX, glWinY, pmv, objPos);
     }
 
     public float[] getColor() {
@@ -960,19 +1018,21 @@ public abstract class Shape {
         if( resizable && e instanceof PinchToZoomGesture.ZoomEvent ) {
             final PinchToZoomGesture.ZoomEvent ze = (PinchToZoomGesture.ZoomEvent) e;
             final float pixels = ze.getDelta() * ze.getScale(); //
-            final float[] objPos2 = { 0f, 0f, 0f };
             final int winX2 = glWinX + Math.round(pixels);
-            final boolean ok = winToObjCoord(pmv, viewport, winX2, glWinY, objPos2);
+            final float[] objPos2 = winToShapeCoord(pmv, viewport, winX2, glWinY, new float[3]);
+            if( null == objPos2 ) {
+                return;
+            }
             final float dx = objPos2[0];
             final float dy = objPos2[1];
             final float sx = scale[0] + ( dx/box.getWidth() ); // bottom-right
             final float sy = scale[1] + ( dy/box.getHeight() );
             if( DEBUG ) {
-                System.err.printf("DragZoom: resize %b, ok %b, obj %4d/%4d, %.3f/%.3f/%.3f %.3f/%.3f/%.3f + %.3f/%.3f -> %.3f/%.3f%n",
-                        inResize, ok, glWinX, glWinY, objPos[0], objPos[1], objPos[2], position[0], position[1], position[2],
+                System.err.printf("DragZoom: resize %b, obj %4d/%4d, %.3f/%.3f/%.3f %.3f/%.3f/%.3f + %.3f/%.3f -> %.3f/%.3f%n",
+                        inResize, glWinX, glWinY, objPos[0], objPos[1], objPos[2], position[0], position[1], position[2],
                         dx, dy, sx, sy);
             }
-            if( ok && resize_sxy_min <= sx && resize_sxy_min <= sy ) { // avoid scale flip
+            if( resize_sxy_min <= sx && resize_sxy_min <= sy ) { // avoid scale flip
                 if( DEBUG ) {
                     System.err.printf("PinchZoom: pixels %f, obj %4d/%4d, %.3f/%.3f/%.3f %.3f/%.3f/%.3f + %.3f/%.3f -> %.3f/%.3f%n",
                             pixels, glWinX, glWinY, objPos[0], objPos[1], objPos[2], position[0], position[1], position[2],
diff --git a/src/graphui/classes/com/jogamp/graph/ui/gl/shapes/Button.java b/src/graphui/classes/com/jogamp/graph/ui/gl/shapes/Button.java
index 226477f80..fb81522ad 100644
--- a/src/graphui/classes/com/jogamp/graph/ui/gl/shapes/Button.java
+++ b/src/graphui/classes/com/jogamp/graph/ui/gl/shapes/Button.java
@@ -27,7 +27,6 @@
  */
 package com.jogamp.graph.ui.gl.shapes;
 
-import com.jogamp.opengl.GL;
 import com.jogamp.opengl.GL2ES2;
 
 import com.jogamp.graph.curve.OutlineShape;
@@ -114,7 +113,7 @@ public class Button extends RoundButton {
         final float[] ctr = box.getCenter();
         final float[] ltx = new float[] { ctr[0] - lctr[0], ctr[1] - lctr[1], 0f };
 
-        if( true || DRAW_DEBUG_BOX ) {
+        if( DRAW_DEBUG_BOX ) {
             System.err.println("RIButton: dim "+width+" x "+height+", spacing "+spacingX+", "+spacingY);
             System.err.println("RIButton: net-text "+lw+" x "+lh);
             System.err.println("RIButton: shape "+box);
diff --git a/src/graphui/classes/com/jogamp/graph/ui/gl/shapes/GLButton.java b/src/graphui/classes/com/jogamp/graph/ui/gl/shapes/GLButton.java
index 792027d7d..4ddb44606 100644
--- a/src/graphui/classes/com/jogamp/graph/ui/gl/shapes/GLButton.java
+++ b/src/graphui/classes/com/jogamp/graph/ui/gl/shapes/GLButton.java
@@ -93,8 +93,8 @@ public class GLButton extends TexSeqButton {
 
     @Override
     public void draw(final GL2ES2 gl, final RegionRenderer renderer, final int[] sampleCount) {
-        final int[/*2*/] surfaceSize = new int[2];
-        final boolean got_sz = getSurfaceSize(renderer.getMatrix(), renderer.getViewport(), surfaceSize) && 0 < surfaceSize[0] && 0 < surfaceSize[1];
+        final int[/*2*/] surfaceSize = getSurfaceSize(renderer.getMatrix(), renderer.getViewport(), new int[2]);
+        final boolean got_sz = null != surfaceSize && 0 < surfaceSize[0] && 0 < surfaceSize[1];
 
         if( null == fboGLAD ) {
             final ImageSequence imgSeq = (ImageSequence)texSeq;