CameraNode + ViewPort + PiP-Camera, black when attaching cameranode to target?

Troubleshooting
1

Hi

I’ve recently tried adding a cameranode to my PiP camera, so to make it follow the selected spatial. The Picture-in-Picture camera is working fine, but as the entity I’m pointing the PiP-camera at is moving, it’s not much good. Now, adding the cameranode seems okay, however when I add the following line:

selectedSpatial.getParent().attachChild(camNode);

The picture in picture-viewport is all black. The node i’m moving is the parent of the spatial.

I’m running out of ideas. You can see my code here:

https://github.com/assofohdz/AlpineTerra/blob/master/src/alpineterra/appstates/HudState.java

Please help me, Obiwan Kenobi.

2

Hi,

Maybe your camera “lookAt” to a wrong direction (if you have no background, it’s black), mimic the direction (rotation) of parent should be not what you whish. You can try to add a Control to your CameraNode, to force it to “lookAt” your player or your selectedSpatial.

3

That’s the weird thing, I have an ambient light in my scene, so there’s no black anywhere to found.

4

black is the default color when the screen is cleared. Ambient is only applied on materials that that take care of it. So ambient as no impact on the clear/background color.

Did you try to force lookat to selectedSpatial (every frame) ?

Did you try to define the rootNode for the viewport of cam2 ?

viewPort2.setClearEnabled(true);
viewPort2.attachScene(rootNode);
viewPort2.setBackgroundColor(ColorRGBA.Pink);

see jme3:advanced:multiple_camera_views

5

I’ll try those things.

What I meant by having an ambient light is that my scene, when playing the game, has no black anywhere. I can post a screenshot when I get back to you.

Thanks

6

Hi, I’m heaving a very similar problem. I also tried setting the background color to pink as @david_bernard_31 mentioned. The rendering is still black. Have you found a solution for your problem, @asser_fahrenholz?

7

Maybe you’re using normal maps and miss tangents in your model.

8

No, not yet. If I set the background color, the viewport reflects the change.

@normen I’m not even sure what that means, but that doesn’t mean it’s not the cause :smile:

9

Right-click the geometry in the SceneComposer and select Tools->Generate Tangents or if you don’t use the SDK use the TangentBinormalGenerator

10

The main camera can see all the objects just fine. When I then click an object the PiP-camera should show the object chosen in a smaller viewport in the corner (they are basic ‘boxes’ - no fancy stuff).