GeomTristrips Problem

Scripting Issues
1

I’m having trouble getting GeomTristrips to work and I can’t figure out what I’m doing wrong. If I do this:

quad1 = GeomTristrips(Geom.UHStatic)
for a, b, c, d in polygons:
    vertex.addData3f(*a)
    vertex.addData3f(*b)
    vertex.addData3f(*c)
    vertex.addData3f(*d)
    color.addData4f(1, 1, 1, 1)
    color.addData4f(1, 1, 1, 1)
    color.addData4f(1, 1, 1, 1)
    color.addData4f(1, 1, 1, 1)
    quad1.addNextVertices(4)
    quad1.closePrimitive()

I get a jumbled mess. The vertices look like they’re in the right places, but there are bogus triangles connecting vertices that shouldn’t be connected. But if I do this:

quad1 = GeomTristrips(Geom.UHStatic)
for a, b, c, d in polygons:
    vertex.addData3f(*a)
    vertex.addData3f(*b)
    vertex.addData3f(*c)
    color.addData4f(1, 1, 1, 1)
    color.addData4f(1, 1, 1, 1)
    color.addData4f(1, 1, 1, 1)
    quad1.addNextVertices(3)
    quad1.closePrimitive()
    vertex.addData3f(*b)
    vertex.addData3f(*c)
    vertex.addData3f(*d)
    color.addData4f(1, 1, 1, 1)
    color.addData4f(1, 1, 1, 1)
    color.addData4f(1, 1, 1, 1)
    quad1.addNextVertices(3)
    quad1.closePrimitive()

Then it looks okay (except that I haven’t gotten all the polygons wound the right way yet, but that’s a separate issue).

Suggestions?

I realize I probably don’t need to use triangle strips, but that is how the data (which I don’t have control over) is stored, so it would make sense for me to use them if I could get them to work.

Thanks,

2

I got around this by switching from using addNextVertices() to using explicit addVertex() calls. I guess addNextVertices doesn’t work the way I expected.