Build Polys From Existing Points

[Daniel]

This should be simple, just can't find the right thing in the hdk.

I have a gdp that's simply a cloud of points. I want to build triangles based using those existing points. I have all the point indice info I need to do it, I just can't find the class/method I need.

I see the GU_PolyKnit, that may do it.. but it I can't get it to work.. I'm guessing it's something I'm doing wrong since I'm just guessing at the data it needs (the .h file isn't very descriptive)

I know how to make new poly's with new verts.. but I want to use my existing points

Thanks for any pointers

d

[davedjohnson]

I believe that you create a new polygon (I can't remember how) then set the vertices to the points with prim->setVertex(i, pointNum); but this is not clear I'm sure.

Dave

[Daniel]

I believe that you create a new polygon (I can't remember how) then set the vertices to the points with prim->setVertex(i, pointNum); but this is not clear I'm sure.

Dave

Thanks Dave, just enough info to get me on the right track. I knew I could do

poly = GU_PrimPoly::build(gdp, 3, GU_POLY_CLOSED);
poly->getVertex(0).getPt()->getPos() = pos;

I didn't realize I could add a prim without any verts like:

poly = GU_PrimPoly::build(gdp, 0, GU_POLY_CLOSED);
poly->appendVertex(gdp->points()[index0]);
poly->appendVertex(gdp->points()[index1]);
poly->appendVertex(gdp->points()[index2]);

Anyway, that works. Thanks

d

Edited May 23, 2007 by Daniel