add vcglib

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

@@ -0,0 +1,91 @@
+#ifndef __VCGTEST_VOLUME
+#define __VCGTEST_VOLUME
+
+#include "ImplicitSphere.h"
+#include "SphereUnion.h"
+#include "SphereDifference.h"
+
+class Volume
+{
+public:
+	Volume()
+	{
+		ImplicitSphere     s1(vcg::Point3f(-5.0,  0.0,  0.0), 10.0);
+		ImplicitSphere     s2(vcg::Point3f( 5.0,  5.0,  3.0), 7.0);
+		ImplicitSphere     s3(vcg::Point3f( 1.0,  0.0,  10.0), 6.0);
+		SphereUnion        sphere_union(s1, s2);
+		SphereDifference	 sphere_difference(sphere_union, s3);
+		_sphere_diff = sphere_difference;		
+	}
+
+	float V(const int pi, const int pj, const int pk)
+	{
+		return _sphere_diff.V(pi, pj, pk);
+	}
+
+	void GetXIntercept(const vcg::Point3i &p1, const vcg::Point3i &p2, VertexPointer &v)
+	{
+		vcg::Point3f p, n;
+		float d;
+		if (_sphere_diff.DirectedDistance(p1, p2, p, n, d))
+		{
+			v->P() = p;
+			v->N() = n;
+		}
+		else
+		{
+			float f1 = V(p1.X(), p1.Y(), p1.Z());
+			float f2 = V(p2.X(), p2.Y(), p2.Z());
+			float u = (float) f1/(f1-f2);
+			v->P().X() = (float) p1.X()*(1-u) + u*p2.X();
+			v->P().Y() = (float) p1.Y();
+			v->P().Z() = (float) p1.Z();
+			
+		}
+	}
+	void GetYIntercept(const vcg::Point3i &p1, const vcg::Point3i &p2, VertexPointer &v)
+	{
+		vcg::Point3f p, n;
+		float d;
+		if (_sphere_diff.DirectedDistance(p1, p2, p, n, d))
+		{
+			v->P() = p;
+			v->N() = n;
+		}
+		else
+		{
+			float f1 = V(p1.X(), p1.Y(), p1.Z());
+			float f2 = V(p2.X(), p2.Y(), p2.Z());
+			float u = (float) f1/(f1-f2);
+			v->P().X() = (float) p1.X();
+			v->P().Y() = (float) p1.Y()*(1-u) + u*p2.Y();
+			v->P().Z() = (float) p1.Z();
+			
+		}
+	}
+	void GetZIntercept(const vcg::Point3i &p1, const vcg::Point3i &p2, VertexPointer &v)
+	{
+		vcg::Point3f p, n;
+		float d;
+		if (_sphere_diff.DirectedDistance(p1, p2, p, n, d))
+		{
+			v->P() = p;
+			v->N() = n;
+		}
+		else
+		{
+			float f1 = V(p1.X(), p1.Y(), p1.Z());
+			float f2 = V(p2.X(), p2.Y(), p2.Z());
+			float u = (float) f1/(f1-f2);
+			v->P().X() = (float) p1.X();
+			v->P().Y() = (float) p1.Y();
+			v->P().Z() = (float) p1.Z()*(1-u) + u*p2.Z();
+			
+		}
+	}
+
+private:
+  SphereDifference _sphere_diff;
+};
+
+#endif // __VCGTEST_VOLUME