Frustum in parallel projection inverts objects

[iova]

Hello, I am trying to build an parallel view.
I used following frustum settings, to zoom out:

cam.setParallelProjection(true);
cam.setFrustum( 0, 20, -12, 12, -10, 10);
cam.update();

The result is, that I can see my scene only from below and the light is inverted. By the way my scene is not bigger than 10.
And Objects, that should be displayed are missing.

I believe, that someway the rendering is misplaced. Because when I place the camera in top of the objects, I can only see the rear side of the objects.
Maybe something with the size of the camera is wrong? I didn’t change it but used the build in camera from simpleApplication.

[nehon]

Hard to say what’s wrong, but Maybe you can see how it’s done in TestParallelProjection

jMonkeyEngine/jmonkeyengine/blob/master/jme3-examples/src/main/java/jme3test/renderer/TestParallelProjection.java

[pspeed]

What direction is the camera facing?

[Momoko_Fan]

Instead of
cam.setFrustum( 0, 20, -12, 12, -10, 10);
use
cam.setFrustum( 0, 20, -12, 12, 10, -10);

[iova]

Thank you! using

cam.setFrustum( 0, 20, -12, 12, 10, -10) ;

worked. Simply I didn’t see, that the last values were in the wrong way. Yes, first up than down.