I am using Multiple AWTpanels in my application and I would like to add some Filters to multiple views. I can easily add Shadows as a processor on a viewport, but as soon as I add a FilterPostProcessor( on my second viewport) I get the following exception. The problem only occurs when I want to add a FilterPostProcessor on a view that does not override the main frame buffer for example panel2.attachTo(false, viewPort2);
Bellow is a simple test case that shows this problem. If you comment out the line “setUpPostProcessors(viewPort2);” it will run but it will only be adding the post processors to the first viewport.
SEVERE: Uncaught exception thrown in Thread[LWJGL Renderer Thread,5,main]
java.lang.IllegalStateException: Why did you change the output framebuffer?
at com.jme3.system.awt.AwtPanel.postFrame(AwtPanel.java:293)
at com.jme3.renderer.RenderManager.renderViewPort(RenderManager.java:987)
at com.jme3.renderer.RenderManager.render(RenderManager.java:1029)
at com.jme3.app.SimpleApplication.update(SimpleApplication.java:251)
at com.jme3.system.awt.AwtPanelsContext.updateInThread(AwtPanelsContext.java:188)
at com.jme3.system.awt.AwtPanelsContext.access$100(AwtPanelsContext.java:44)
at com.jme3.system.awt.AwtPanelsContext$AwtPanelsListener.update(AwtPanelsContext.java:68)
at com.jme3.system.lwjgl.LwjglOffscreenBuffer.runLoop(LwjglOffscreenBuffer.java:125)
at com.jme3.system.lwjgl.LwjglOffscreenBuffer.run(LwjglOffscreenBuffer.java:151)
at java.lang.Thread.run(Unknown Source)[code title=“Simple Test Case”]
public class TestAwtFilters extends SimpleApplication
{
private static TestAwtFilters app;
private static AwtPanel panel, panel2;
private Vector3f lightDirection = new Vector3f(-5f, -4f, -4).normalizeLocal();
private DirectionalLight directionalLight;
private static int panelsClosed = 0;
private static void createWindowForPanel(AwtPanel panel, int location)
{
JFrame frame = new JFrame("Render Display " + location);
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(panel, BorderLayout.CENTER);
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.addWindowListener(new WindowAdapter()
{
public void windowClosed(WindowEvent e)
{
if (++panelsClosed == 2)
{
app.stop();
}
}
});
frame.pack();
frame.setLocation(location, Toolkit.getDefaultToolkit().getScreenSize().height - 400);
frame.setVisible(true);
}
public static void main(String[] args)
{
Logger.getLogger(“com.jme3”).setLevel(Level.WARNING);
app = new TestAwtFilters();
app.setShowSettings(false);
AppSettings settings = new AppSettings(true);
settings.setCustomRenderer(AwtPanelsContext.class);
settings.setFrameRate(60);
app.setSettings(settings);
app.start();
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
final AwtPanelsContext ctx = (AwtPanelsContext) app.getContext();
panel = ctx.createPanel(PaintMode.Accelerated);
panel.setPreferredSize(new Dimension(400, 300));
ctx.setInputSource(panel);
panel2 = ctx.createPanel(PaintMode.Accelerated);
panel2.setPreferredSize(new Dimension(400, 300));
createWindowForPanel(panel, 300);
createWindowForPanel(panel2, 700);
}
});
}
public void simpleInitApp()
{
flyCam.setDragToRotate(true);
Box b = new Box(Vector3f.ZERO, 1, 1, 1);
Geometry geom = new Geometry(“Box”, b);
Material mat = new Material(assetManager, “Common/MatDefs/Misc/Unshaded.j3md”);
mat.setTexture(“ColorMap”, assetManager.loadTexture(“Interface/Logo/Monkey.jpg”));
geom.setMaterial(mat);
rootNode.attachChild(geom);
Box bGround = new Box(Vector3f.ZERO, 100, 0.01f, 100);
Geometry geomGround = new Geometry(“BoxGround”, bGround);
geomGround.setMaterial(mat);
rootNode.attachChild(geomGround);
ViewPort viewPort2 = getRenderManager().createMainView("cameraClone", cam);
viewPort2.attachScene(getRootNode());
viewPort2.setBackgroundColor(new ColorRGBA(0.7f, 0.8f, 0.8f, 1f));
viewPort2.setClearFlags(true, true, true);
setUpLight();
setUpPostProcessors(viewPort);
// comment out this line to get it to run
setUpPostProcessors(viewPort2);
panel.attachTo(true, viewPort);
panel2.attachTo(false, viewPort2);
}
protected void setUpLight()
{
AmbientLight al = new AmbientLight();
al.setColor(ColorRGBA.White.mult(1.3f));
rootNode.addLight(al);
directionalLight = new DirectionalLight();
directionalLight.setColor(ColorRGBA.White);
directionalLight.setDirection(lightDirection);
rootNode.addLight(directionalLight);
}
public void setUpPostProcessors(ViewPort viewPortToAddTo)
{
DirectionalLightShadowRenderer dlsr = new DirectionalLightShadowRenderer(assetManager, 2048, 4);
dlsr.setLight(directionalLight);
dlsr.setLambda(0.55f);
dlsr.setShadowIntensity(0.6f);
dlsr.setEdgeFilteringMode(EdgeFilteringMode.Dither);
viewPortToAddTo.addProcessor(dlsr);
DepthOfFieldFilter dofFilter = new DepthOfFieldFilter();
dofFilter.setFocusDistance(0);
dofFilter.setFocusRange(50);
dofFilter.setBlurScale(1.4f);
FilterPostProcessor fpp = new FilterPostProcessor(assetManager);
fpp.addFilter(dofFilter);
viewPortToAddTo.addProcessor(fpp);
}
}[/code]