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- let Trace() be a bit smarter about checking 3D slopes. If one matches right up with the floor or ceiling at the line where the trace enters a sector, check a second point to see whether we deal with something inside valid sector bounds or not.
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@ -494,6 +494,17 @@ bool FTraceInfo::LineCheck(intercept_t *in, double dist, DVector3 hit)
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// clip to the part of the sector we are in
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if (hit.Z > ff_top)
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{
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// 3D floor height is the same as the floor height. We need to test a second spot to see if it is above or below
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if (fabs(bf - ff_top) < EQUAL_EPSILON)
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{
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double cf = entersector->floorplane.ZatPoint(entersector->centerspot);
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double ffc = rover->top.plane->ZatPoint(entersector->centerspot);
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if (ffc > cf)
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{
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bf = ff_top - EQUAL_EPSILON;
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}
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}
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// above
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if (bf < ff_top)
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{
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@ -505,6 +516,17 @@ bool FTraceInfo::LineCheck(intercept_t *in, double dist, DVector3 hit)
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}
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else if (hit.Z < ff_bottom)
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{
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// 3D floor height is the same as the ceiling height. We need to test a second spot to see if it is above or below
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if (fabs(bc - ff_bottom) < EQUAL_EPSILON)
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{
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double cc = entersector->ceilingplane.ZatPoint(entersector->centerspot);
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double fcc = rover->bottom.plane->ZatPoint(entersector->centerspot);
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if (fcc < cc)
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{
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bc = ff_bottom + EQUAL_EPSILON;
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}
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}
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//below
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if (bc > ff_bottom)
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{
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