--- a/include/material.h	Thu Apr 24 10:49:11 2008 +0200
+++ b/include/material.h	Thu Apr 24 13:55:11 2008 +0200
@@ -51,6 +51,7 @@
 class ColourMap
 {
 public:
+	virtual ~ColourMap() {};
 	virtual Colour map(const Float &val) = 0;
 };
 
@@ -106,6 +107,7 @@
 public:
 	TextureMap(const Vector3 &acenter, const Float &size):
 		center(acenter), invsize(1./size) {};
+	virtual ~TextureMap() {};
 	virtual void map(const Vector3 &point, Float &u, Float &v) = 0;
 };
 
@@ -257,7 +259,7 @@
 		u -= floor(u);
 		v = -(v - 0.5);
 		v -= floor(v);
-		return pixmap->get(u*pixmap->getWidth(), v*pixmap->getHeight());
+		return pixmap->get((int)(u*pixmap->getWidth()), (int)(v*pixmap->getHeight()));
 	};
 };