X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fgeometry%2Ftransformedshape.h;h=34fd2989f2cfeaadddcf40ef6822ae2fb37c62d0;hb=c135ff2480f4e2aaf05b0206631bb0e1b5d73fad;hp=ea7281f746067c8d0c4dcb757edd1120ee0c903b;hpb=9260eee3126731c1e6b54ce3407be757d0d71716;p=libs%2Fmath.git

diff --git a/source/geometry/transformedshape.h b/source/geometry/transformedshape.h
index ea7281f..34fd298 100644
--- a/source/geometry/transformedshape.h
+++ b/source/geometry/transformedshape.h
@@ -8,6 +8,9 @@
 namespace Msp {
 namespace Geometry {
 
+/**
+A shape modified by an affine transformation.
+*/
 template<typename T, unsigned D>
 class TransformedShape: public Shape<T, D>
 {
@@ -104,6 +107,7 @@ inline unsigned TransformedShape<T, D>::get_intersections(const Ray<T, D> &ray,
 			/* XXX This is not correct for nonuniform scaling.  Inverse of the
 			transpose of the upper DxD part of the matrix should be used. */
 			points[i].normal = transformation.transform(points[i].normal);
+			points[i].distance = inner_product(points[i].position-ray.get_start(), ray.get_direction());
 		}
 	}
 	return count;