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light: handle iffy faces

This commit is contained in:
Eric Wasylishen 2017-06-15 13:43:42 -06:00
parent 37ed11c2ed
commit ce8ad6c384
1 changed files with 8 additions and 1 deletions
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9
light/ltface.cc
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@ -402,6 +402,10 @@ position_t CalcPointNormal(const bsp2_t *bsp, const bsp2_dface_t *face, const qv
const auto &points = facecache.points();
const auto &edgeplanes = facecache.edgePlanes();
// check for degenerate face
if (points.empty() || edgeplanes.empty())
return position_t(origPoint);
// project `point` onto the surface plane, then lift it off again
const qvec3f point = GLM_ProjectPointOntoPlane(surfplane, origPoint) + (qvec3f(surfplane) * sampleOffPlaneDist);
@ -551,7 +555,10 @@ PositionSamplePointOnFace(const bsp2_t *bsp,
}
const float planedist = GLM_DistAbovePlane(plane, point);
Q_assert(fabs(planedist - sampleOffPlaneDist) <= 0.1);
if (!(fabs(planedist - sampleOffPlaneDist) <= 0.1)) {
// something is wrong?
return position_t(point);
}
const float insideDist = GLM_EdgePlanes_PointInsideDist(edgeplanes, point);
if (insideDist < -POINT_EQUAL_EPSILON) {