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- return some invalid but recognizable magic value when IntersectLines is being passed two collinear lines.

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This actually should check if the two lines are identical but since this is rather expensive and rarely needed it's better handled by returning a distinct value the caller can handle if needed.
This commit is contained in:
Christoph Oelckers 2022-10-17 17:58:57 +02:00
parent e3254a8546
commit a3dbfab54b
1 changed files with 1 additions and 1 deletions
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source/common/utility/geometry.h
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@ -141,7 +141,7 @@ inline double InterceptLineSegments(double v2x, double v2y, double v2dx, double
double den = v1dy * v2dx - v1dx * v2dy;
if (den == 0)
return 0; // parallel
return -2 * (double)FLT_MAX; // parallel (return a magic value different from everything else, just in case it needs to be handled)
if (forcansee && den < 0) // cansee does this added check here, aside from that its logic is virtually the same.
return -1; // hitting the backside