Points not on neighbor polygons edges
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On 16/03/2013 at 15:33, xxxxxxxx wrote:
User Information:
Cinema 4D Version: R12
Platform: Windows ; Mac OSX ;
Language(s) : C++ ;---------
Let's say that I have two triangles (ta and tb) with a neighboring edge. Using GetPolyInfo(ta), the point of ta that is not on the edge is trivial (for edge[0], it would be ta->c since edge[0] represents an edge from points a->b, etc.). Is there a simple way to get the point not on the edge for tb or do I really need to find out which of the three point indices of tb (tb->a, tb->b, tb->c) don't match ta->a and ta->b? -
On 16/03/2013 at 17:07, xxxxxxxx wrote:
Well, okay. I went the 'et tu, brute'-force method. Here is an example for the curious:
pinfo = neighbor.GetPolyInfo(i); if (!pinfo->mark[0]) { s->Init(f->p1, f->p2, ks, kd, 0.0, 1000.0); ++s; ++scnt; // Diagonal bracing across points not on edge for triangles ef = pinfo->face[0]; if (ef != NOTOK) { np = &polys[ef]; if ((np->a != p->a) && (np->a != p->b)) s->Init(f->p3, &masses[np->a], ks, kd, 0.0, 1000.0); else if ((np->b != p->a) && (np->b != p->b)) s->Init(f->p3, &masses[np->b], ks, kd, 0.0, 1000.0); else s->Init(f->p3, &masses[np->c], ks, kd, 0.0, 1000.0); ++s; ++scnt; } }Note: the number of 'edges' (in this case, the 's' array) total for a triangulated object becomes neighbor->GetEdgeCount() + (polygonCount * 2).