[gl2ps] occlusion culling issue

[matt hall]

hi,

i'm writing to ask a question about an issue that is cropping up in
relation to occlusion culling with an openGL scene i'm interwsted in
converting to EPS.

I'm rendering several 3d visualisations of surfaces (they look like
crosses and blobs and things like that) which are manipulated by the user
via and arcball rotation that is applied directly to the GL_MODELVIEW
matrix via glMultMatrix(). When i apply a rotation, i find that the EPS
output generated has culled the occlusion in the wrong plane. Is this to
do with the way in which i am applying the rotation?

this problem vanishes if i turn of occulsion culling in gl2ps, but in this
case the resulting files are quite large.

many thanks,



matt.