Difficulty with viewpoint when using 3 ppt lights

[farshizzo]

Hi,

Thanks for the sample code. Everything looks fine. So negating the z value of the vertex doesn't make a difference?

To get around the bug try the following instead:

1) Create a static wand with a vertex at the origin (0,0,0) and another vertex along the positive z axis (0,0,wandLength)

2) Instead of changing the vertex of the wand every frame, translate the wand to the position at one end, then have it look at the position on the other end:

wand.translate(data2)
wand.lookat(data3)

This method assumes that the length of the wand is fixed.