move old zslice code here. this function returns one or two triangles based on the original triangle, sliced at zcut. pushcutter now uses a better way, so this is not needed anymore.
move old zslice code here.
this function returns one or two triangles based on the original triangle, sliced at zcut.
pushcutter now uses a better way, so this is not needed anymore.


aewallin/opencamlib,aewallin/opencamlib,aewallin/opencamlib,aewallin/opencamlib,aewallin/opencamlib