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fixed nasty bug in shapes/Cyl where intersection results were being allowed if they were negative

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git-svn-id: svn://anubis/fart/trunk@192 7f9b0f55-74a9-4bce-be96-3c2cd072584d
This commit is contained in:
Josh Holtrop 2009-03-08 16:03:52 +00:00
parent 14b6735c1c
commit 9972ebdb41
1 changed files with 2 additions and 2 deletions
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4
shapes/Cyl.cc
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@ -32,7 +32,7 @@ Shape::IntersectionList Cyl::intersect(refptr<Shape> _this, const Ray & ray)
LinearSolver solver(-ray_inv.getDirection()[2],
-ray_inv.getOrigin()[2]);
Solver::Result solutions = solver.solve();
if (solutions.numResults > 0)
if (solutions.numResults > 0 && solutions.results[0] > 0.0)
{
Vector isect_point = ray_inv[solutions.results[0]];
if (isect_point[0]*isect_point[0] + isect_point[1]*isect_point[1]
@ -50,7 +50,7 @@ Shape::IntersectionList Cyl::intersect(refptr<Shape> _this, const Ray & ray)
LinearSolver solver(ray_inv.getDirection()[2],
ray_inv.getOrigin()[2] - m_height);
Solver::Result solutions = solver.solve();
if (solutions.numResults > 0)
if (solutions.numResults > 0 && solutions.results[0] > 0.0)
{
Vector isect_point = ray_inv[solutions.results[0]];
if (isect_point[0]*isect_point[0] + isect_point[1]*isect_point[1]