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- added InterceptVector from GZDoom.

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This will be useful for some backend stuff.
This commit is contained in:
Christoph Oelckers 2022-09-24 14:44:21 +02:00
parent ef3be6181e
commit b7ddd9e784
1 changed files with 14 additions and 0 deletions
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14
source/core/gamefuncs.h
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@ -584,6 +584,20 @@ inline double SquareDistToLine(double px, double py, double lx1, double ly1, dou
return SquareDist(px, py, xx, yy);
}
// taken from GZDoom with the divline_t parameters removed
double InterceptVector(double v2x, double v2y, double v2dx, double v2dy, double v1x, double v1y, double v1dx, double v1dy)
{
double den = v1dy * v2dx - v1dx * v2dy;
if (den == 0)
return 0; // parallel
double num = (v1x - v2x) * v1dy + (v2y - v1y) * v1dx;
return num / den;
}
inline void alignceilslope(sectortype* sect, const DVector3& pos)
{
sect->setceilingslope(getslopeval(sect, pos, sect->ceilingz));