add vcglib

vcglib/apps/unsupported/extractors/extractor/Implicit.h

@@ -0,0 +1,18 @@
+#ifndef __EXTRS_IMPLICIT
+#define __EXTRS_IMPLICIT
+
+#include <vcg/space/point3.h>
+
+class Implicit
+{
+public:
+	Implicit() {};
+
+	virtual ~Implicit() {};
+
+	virtual float V(int x, int y, int z) const = 0;
+
+	virtual vcg::Point3f N(float x, float y, float z) const = 0;
+};
+
+#endif // __EXTRS_IMPLICIT