Render to texture of a component in the gui bucket

Troubleshooting gui
1

Hi,



is it possible to render a GUI component (located in gui bucket and rendered orthogonal) to render to a texture. I tried the sample code from the TestRenderToTexture but i didn’t succeed. I only see a very small stripe of the component.



I simply want to know, if this can be done this way or not.



The code is:

[java]

Camera offCamera = new Camera(512, 512);

ViewPort offView = GUIManager.getInstance().getRenderManager().createPreView(“Offscreen View”, offCamera);

offView.setClearFlags(true, true, true);

offView.setBackgroundColor(ColorRGBA.Black);



// create offscreen framebuffer

FrameBuffer offBuffer = new FrameBuffer(512, 512, 1);



// setup framebuffer’s cam

offCamera.setFrustumPerspective(45f, 1f, 1f,1000f);

offCamera.setLocation(new Vector3f(0f, 0f, -1f));

offCamera.lookAt(new Vector3f(0f, 0f, 0f), Vector3f.UNIT_Z);



// setup framebuffer’s texture

Texture2D offTex = new Texture2D(512, 512, Format.ABGR8);

offTex.setMinFilter(Texture.MinFilter.Trilinear);

offTex.setMagFilter(Texture.MagFilter.Bilinear);



// setup framebuffer to use texture

offBuffer.setDepthBuffer(Format.Depth16);

offBuffer.setColorTexture(offTex);



// set viewport to render to offscreen framebuffer

offView.setOutputFrameBuffer(offBuffer);

offView.attachScene(dragComponent.getVisibleNode());



//set the texture to the gui component

setBackgroundTexture(offTex);

[/java]



FYI: I need this to implement drag and drop indication for a gui lib.

2

Which size is your compoent? 512x512?

3

I’m using render-to-texture and display the resulting texture as a NiftyImage, so yes, it’s possible.

Make sure the component you’re using has the correct translation and rotation.



Edit: i read your requirement backwards, i’m afraid.