3 files changed, 39 insertions, 27 deletions
diff --git a/src/com/jogamp/opencl/demos/julia3d/Julia3d.java b/src/com/jogamp/opencl/demos/julia3d/Julia3d.java
index 9f032cf..45bf706 100644
--- a/src/com/jogamp/opencl/demos/julia3d/Julia3d.java
+++ b/src/com/jogamp/opencl/demos/julia3d/Julia3d.java
@@ -1,5 +1,10 @@
 package com.jogamp.opencl.demos.julia3d;
 
+import java.awt.event.WindowEvent;
+import java.awt.event.WindowAdapter;
+import java.awt.Canvas;
+import java.awt.Dimension;
+import javax.swing.JFrame;
 import com.jogamp.opencl.CLBuffer;
 import com.jogamp.opencl.CLCommandQueue;
 import com.jogamp.opencl.CLContext;
@@ -17,6 +22,8 @@ import java.nio.FloatBuffer;
 import javax.media.opengl.GLProfile;
 import javax.swing.SwingUtilities;
 
+import static com.jogamp.opencl.CLDevice.Type.*;
+import static com.jogamp.opencl.util.CLPlatformFilters.*;
 import static com.jogamp.opencl.CLMemory.Mem.*;
 import static com.jogamp.opencl.CLProgram.CompilerOptions.*;
 import static com.jogamp.opencl.demos.julia3d.UserSceneController.*;
@@ -45,13 +52,13 @@ public class Julia3d {
         updateCamera();
 
         //setup, prefere GPUs
-        CLDevice device = CLPlatform.getDefault().getMaxFlopsDevice(CLDevice.Type.GPU);
+        CLDevice device = CLPlatform.getDefault(type(GPU)).getMaxFlopsDevice();
         if(device == null) {
             device = CLPlatform.getDefault().getMaxFlopsDevice();
         }
         context = CLContext.create(device);
 
-        workGroupSize = 256;
+        workGroupSize = Math.min(256, device.getMaxWorkGroupSize());
 
         //allocate buffers
         configBuffer = context.createBuffer(config.getBuffer(), READ_ONLY);
@@ -189,8 +196,10 @@ public class Julia3d {
 
 
     public static void main(String[] args) {
+        
         GLProfile.initSingleton(true);
-        RenderingConfig config = RenderingConfig.create()
+        
+        final RenderingConfig config = RenderingConfig.create()
             .setWidth(640).setHeight(480)
             .setEnableShadow(1)
             .setSuperSamplingSize(2)
@@ -207,7 +216,25 @@ public class Julia3d {
 
         SwingUtilities.invokeLater(new Runnable() {
             public void run() {
-                new Renderer(julia3d);
+                
+                Renderer renderer = new Renderer(julia3d);
+                CLDevice device = julia3d.getDevice();
+                
+                JFrame frame = new JFrame("Java OpenCL - Julia3D "+device.getType()+" "+device.getName());
+                frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+                frame.addWindowListener(new WindowAdapter() {
+                    @Override
+                    public void windowClosed(WindowEvent e) {
+                        julia3d.release();
+                        System.exit(0);
+                    }
+                });
+                Canvas canvas = renderer.getCanvas();
+                canvas.setPreferredSize(new Dimension(config.getWidth(), config.getHeight()));
+                frame.add(canvas);
+                frame.pack();
+                frame.setVisible(true);
+                
             }
         });
     }
diff --git a/src/com/jogamp/opencl/demos/julia3d/Renderer.java b/src/com/jogamp/opencl/demos/julia3d/Renderer.java
index 6fe2309..4713b2d 100644
--- a/src/com/jogamp/opencl/demos/julia3d/Renderer.java
+++ b/src/com/jogamp/opencl/demos/julia3d/Renderer.java
@@ -1,13 +1,9 @@
 package com.jogamp.opencl.demos.julia3d;
 
-import com.jogamp.opencl.CLDevice;
 import com.jogamp.opencl.demos.julia3d.structs.RenderingConfig;
 import com.jogamp.opengl.util.awt.TextRenderer;
-import java.awt.Dimension;
+import java.awt.Canvas;
 import java.awt.Font;
-import java.awt.event.WindowAdapter;
-import java.awt.event.WindowEvent;
-import java.awt.event.WindowListener;
 import java.nio.FloatBuffer;
 import java.util.Timer;
 import java.util.TimerTask;
@@ -17,7 +13,6 @@ import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLEventListener;
 import javax.media.opengl.GLProfile;
 import javax.media.opengl.awt.GLCanvas;
-import javax.swing.JFrame;
 
 import static com.jogamp.common.nio.Buffers.*;
 import static javax.media.opengl.GL2.*;
@@ -42,6 +37,7 @@ public class Renderer implements GLEventListener {
     private final Timer timer;
 
     public Renderer(final Julia3d julia3d) {
+        
         this.julia3d = julia3d;
         this.config = julia3d.config;
 
@@ -55,23 +51,8 @@ public class Renderer implements GLEventListener {
         usi = new UserSceneController();
         usi.init(this, canvas, config);
 
-        CLDevice device = julia3d.getDevice();
-        JFrame frame = new JFrame("Java OpenCL - Julia3D "+device.getType()+" "+device.getName());
-        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
-        frame.addWindowListener(new WindowAdapter() {
-            @Override
-            public void windowClosed(WindowEvent e) {
-                julia3d.release();
-                System.exit(0);
-            }
-        });
-        canvas.setPreferredSize(new Dimension(config.getWidth(), config.getHeight()));
-        frame.add(canvas);
-        frame.pack();
-
-        textRenderer = new TextRenderer(frame.getFont().deriveFont(Font.BOLD, 14), true, true, null, false);
+        textRenderer = new TextRenderer(new Font("Helvetica", Font.BOLD, 14), true, true, null, false);
 
-        frame.setVisible(true);
     }
 
     public void init(GLAutoDrawable drawable) {
@@ -211,5 +192,9 @@ public class Renderer implements GLEventListener {
     public void dispose(GLAutoDrawable drawable) {
     }
 
+    public Canvas getCanvas() {
+        return canvas;
+    }
+
 
 }
diff --git a/src/com/jogamp/opencl/demos/julia3d/UserSceneController.java b/src/com/jogamp/opencl/demos/julia3d/UserSceneController.java
index fda54be..17b8956 100644
--- a/src/com/jogamp/opencl/demos/julia3d/UserSceneController.java
+++ b/src/com/jogamp/opencl/demos/julia3d/UserSceneController.java
@@ -135,7 +135,7 @@ public class UserSceneController {
                         model.setEnableShadow(model.getEnableShadow()==0 ? 1 : 0);
                         break;
                     case '1':
-                        model.setEpsilon(model.getEpsilon() * 0.75f);
+                        model.setEpsilon(max(0.0001f, model.getEpsilon() * 0.75f));
                         break;
                     case '2':
                         model.setEpsilon(model.getEpsilon() * 1.f / 0.75f);