X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Fyoink;a=blobdiff_plain;f=src%2FMoof%2FPlane.hh;h=11cd63ec23f2bf7f6517a8b2d5e937eb6f3832f3;hp=5ec59eab28e1c6115f4923b92892de9fd5e9d572;hb=7e84479de612a4ce287c6f63deb014b447a993ec;hpb=a723e23ca2d32e8eed32f9c53323afbbedba575b

diff --git a/src/Moof/Plane.hh b/src/Moof/Plane.hh
index 5ec59ea..11cd63e 100644
--- a/src/Moof/Plane.hh
+++ b/src/Moof/Plane.hh
@@ -79,7 +79,8 @@ struct Plane : public Shape<3>
 			{
 				// the ray lies on the plane
 				intersection.point = ray.point;
-				intersection.normal = normal;
+				intersection.normal.set(0.0, 0.0, 0.0);
+				//intersection.normal = normal;
 				return SCALAR(0.0);
 			}
 
@@ -87,11 +88,14 @@ struct Plane : public Shape<3>
 			return SCALAR(-1.0);
 		}
 
-		Scalar t = (cml::dot(ray.point, normal) + d) / denominator;
+		Scalar distance = cml::dot(ray.point, normal) + d;
+		Scalar t = -distance / denominator;
 		if (t > SCALAR(0.0))
 		{
 			ray.solve(intersection.point, t);
-			intersection.normal = normal;
+
+			if (distance >= 0.0) intersection.normal = normal;
+			else                 intersection.normal = -normal;
 		}
 
 		return t;