TestRenderToCubemap seems to be only rendering one of the cube sides onto the sky box.
In the below example the cubemap viewport is rendering a cube which is rotating around the origin, which should show up in all of the skybox faces. But it only shows up in one of them - the one the camera is facing at the start.
Here is the example (note its modified slightly from the github version here):
import com.jme3.app.SimpleApplication;
import com.jme3.material.Material;
import com.jme3.math.ColorRGBA;
import com.jme3.math.FastMath;
import com.jme3.math.Quaternion;
import com.jme3.math.Vector3f;
import com.jme3.renderer.Camera;
import com.jme3.renderer.ViewPort;
import com.jme3.scene.Geometry;
import com.jme3.scene.Spatial;
import com.jme3.scene.shape.Box;
import com.jme3.system.AppSettings;
import com.jme3.texture.FrameBuffer;
import com.jme3.texture.Image.Format;
import com.jme3.texture.Texture;
import com.jme3.texture.TextureCubeMap;
import com.jme3.util.SkyFactory;
import com.jme3.util.SkyFactory.EnvMapType;
/**
* Renders a rotating box to a cubemap texture, then applies the cubemap
* texture as a sky.
* Modified for a test my murph9.
*/
public class TestRenderToCubemap extends SimpleApplication {
private Geometry offBox;
private float angle = 0;
private ViewPort offView;
public static void main(String[] args){
TestRenderToCubemap app = new TestRenderToCubemap();
AppSettings settings = new AppSettings(true);
settings.setVSync(true);
app.setSettings(settings);
app.start();
}
public Texture setupOffscreenView(){
Camera offCamera = new Camera(512, 512);
offView = renderManager.createPreView("Offscreen View", offCamera);
offView.setClearFlags(true, true, true);
offView.setBackgroundColor(ColorRGBA.DarkGray);
// create offscreen framebuffer
FrameBuffer offBuffer = new FrameBuffer(512, 512, 1);
//setup framebuffer's cam
offCamera.setFrustumPerspective(45f, 1f, 0.1f, 1000f);
offCamera.setLocation(new Vector3f(0f, 0f, 0f));
offCamera.lookAt(new Vector3f(-1f, 0f, 0f), Vector3f.UNIT_Y);
//setup framebuffer's texture
TextureCubeMap offTex = new TextureCubeMap(512, 512, Format.RGBA8);
offTex.setMinFilter(Texture.MinFilter.Trilinear);
offTex.setMagFilter(Texture.MagFilter.Bilinear);
//setup framebuffer to use texture
offBuffer.setDepthBuffer(Format.Depth);
offBuffer.setMultiTarget(true);
offBuffer.addColorTexture(offTex, TextureCubeMap.Face.NegativeX);
offBuffer.addColorTexture(offTex, TextureCubeMap.Face.PositiveX);
offBuffer.addColorTexture(offTex, TextureCubeMap.Face.NegativeY);
offBuffer.addColorTexture(offTex, TextureCubeMap.Face.PositiveY);
offBuffer.addColorTexture(offTex, TextureCubeMap.Face.NegativeZ);
offBuffer.addColorTexture(offTex, TextureCubeMap.Face.PositiveZ);
//set viewport to render to offscreen framebuffer
offView.setOutputFrameBuffer(offBuffer);
// setup framebuffer's scene
Box boxMesh = new Box(0.1f,0.1f,0.1f);
Material material = new Material(getAssetManager(), "Common/MatDefs/Misc/Unshaded.j3md");
material.setColor("Color", ColorRGBA.White);
offBox = new Geometry("box", boxMesh);
offBox.setMaterial(material);
// attach the scene to the viewport to be rendered
offView.attachScene(offBox);
return offTex;
}
@Override
public void simpleInitApp() {
cam.setLocation(new Vector3f());
cam.lookAt(Vector3f.UNIT_X, Vector3f.UNIT_Y);
Texture offTex = setupOffscreenView();
Spatial sky = SkyFactory.createSky(assetManager, offTex, EnvMapType.CubeMap);
rootNode.attachChild(sky);
}
private int frameCount = 0;
@Override
public void simpleUpdate(float tpf){
frameCount++;
Quaternion q = new Quaternion();
angle += tpf;
angle %= FastMath.TWO_PI;
q.fromAngles(angle, 0, angle);
offBox.setLocalTranslation(new Quaternion().fromAngleAxis(FastMath.PI*(((float)frameCount)/120), Vector3f.UNIT_Y).mult(new Vector3f(1,0,0)));
offBox.setLocalRotation(q);
offBox.updateLogicalState(tpf);
offBox.updateGeometricState();
}
}
In my actual use case which i am attempting to get real time reflections like this. Although using this method has every face have the same ambient light and only one has colour. (iām hoping the above example will prevent the need to go into this)
Thanks,
Jake
