public static SupportPoint SegmentSupportPoint(cpSegmentShape seg, cpVect n)
{
if (cpVect.cpvdot(seg.ta, n) > cpVect.cpvdot(seg.tb, n))
{
return(new SupportPoint(seg.ta, 0));
}
else
{
return(new SupportPoint(seg.tb, 1));
}
}
public static Edge SupportEdgeForSegment(cpSegmentShape seg, cpVect n)
{
ulong hashid = seg.hashid;
Edge edge;
if (cpVect.cpvdot(seg.tn, n) > 0.0f)
{
edge = new Edge(
new EdgePoint(seg.ta, cp.CP_HASH_PAIR(seg.hashid, 0)),
new EdgePoint(seg.tb, cp.CP_HASH_PAIR(seg.hashid, 1)),
seg.r, seg.tn);
}
else
{
edge = new Edge(
new EdgePoint(seg.tb, cp.CP_HASH_PAIR(seg.hashid, 1)),
new EdgePoint(seg.ta, cp.CP_HASH_PAIR(seg.hashid, 0)),
seg.r, cpVect.cpvneg(seg.tn)
);
}
return(edge);
}