Camera.getWorldCoordinates returns incorrect values in parallel projection

Development
1

If I “zoom out” a certain amount in parallel projection by changing the frustum, the camera stops returning values for getWorldCoordinates.



If I change Matrix4f.java from:

if ( FastMath.abs(fDet) <= FastMath.FLT_EPSILON )

return zero();

to

if ( FastMath.abs(fDet) <= 0 )

return zero();

everything starts working again.



The same thing happened in jme2 and their solution was to change FastMath.FLT_EPSILON to 0:

http://hub.jmonkeyengine.org/groups/general-2/forum/topic/matrix-cannot-be-inverted-in-parallel-projection/



Does it make sense to do it in jme3 as well or should I use something else to get world coordinates in parallel projection?

2

It seems the change was applied in jME2, but not in jME3.

Since people had no issue with it so far, I decided to apply it to jME3, it is in the latest SVN revision.

3

I see the change on the invert() method, but jme3 camera uses the invertLocal() method… could you change there as well?

4

Should be fixed now.

5

Yep, it’s perfect now, thanks.