From 9d37776dd6c0ac534e248b17f65e1b889e5b8e96 Mon Sep 17 00:00:00 2001
From: nicopietroni <nico.pietroni@isti.cnr.it>
Date: Fri, 16 Mar 2012 13:50:45 +0000
Subject: [PATCH] first release version

---
 wrap/gl/gl_field.h | 142 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 wrap/gl/gl_field.h

diff --git a/wrap/gl/gl_field.h b/wrap/gl/gl_field.h
new file mode 100644
index 00000000..360aa5de
--- /dev/null
+++ b/wrap/gl/gl_field.h
@@ -0,0 +1,142 @@
+namespace vcg{
+template <class MeshType>
+class GLField
+{
+	typedef typename MeshType::FaceType FaceType;
+	typedef typename MeshType::VertexType VertexType;
+	typedef typename MeshType::ScalarType ScalarType;
+
+	///draw the cross field of a given face
+	static void GLDrawField(MeshType &mesh,
+							const FaceType &f,
+							ScalarType &size)
+	{
+		CoordType center=(f.P0(0)+f.P0(1)+f.P0(2))/3;
+		CoordType normal=f.cN();
+		CoordType dir[4];
+		vcg::tri::CrossField<MeshType>::CrossVector(mesh,f,dir);
+		/*ScalarType ImportVal=ImportanceField(f);
+		glLineWidth(20.f*ImportVal);*/
+		glLineWidth(1);
+		vcg::Color4b c;
+		/*c.ColorRamp(0,1,float (ImportVal) );*/
+		vcg::glColor(vcg::Color4b(0,0,0,255));
+
+		glBegin(GL_LINES);
+		for (int i=0;i<4;i++)
+		{
+			glVertex(center);
+			glVertex(center+dir[i]*size);
+		}
+		glEnd();
+	}
+
+
+	//void GLDrawField(const VertexType &v,
+	//	ScalarType &size)
+	//{
+	//	//if ((rand()%5)!=0)return;
+	//	CoordType center=v.cP();
+	//	CoordType normal=v.cN();
+	//	CoordType dir[4];
+	//	CoordType dir0=v.cPD1();
+	//	ScalarType w0=v.cK1();
+	//	ScalarType w1=v.cK2();
+	//	vcg::tri::CrossField<MeshType>::CrossVector(dir0,normal,dir);
+	//	ScalarType ImportVal=ImportanceField(v);
+	//	//glLineWidth(10.f*ImportVal);
+	//	vcg::Color4b c;
+	//	//c.ColorRamp(0,1,float (ImportVal) );
+	//	//vcg::glColor(c);
+	//	//vcg::glColor(vcg::Color4b(100,100,100,255));
+	//	if (rand()%2==0) std::swap(w0, w1);
+	//	float s;
+	//	if (w0>w1)
+	//	{
+	//		vcg::glColor(vcg::Color4b(50,50,50,255));
+	//		glLineWidth(2.0);
+	//		s=2;
+	//	}
+	//	else
+	//	{
+	//		vcg::glColor(vcg::Color4b(150,150,150,255));
+	//		glLineWidth(1);
+	//		s=1;
+	//	}
+	//	glBegin(GL_LINES);
+	//	glVertex(center);
+	//	glVertex(center+dir[0]*size*s);
+	//	glVertex(center);
+	//	glVertex(center+dir[2]*size*s);
+	//	glEnd();
+	//	if (w0<=w1)
+	//	{
+	//		vcg::glColor(vcg::Color4b(50,50,50,255));
+	//		glLineWidth(2.0);
+	//		s=2;
+	//	}
+	//	else
+	//	{
+	//		vcg::glColor(vcg::Color4b(150,150,150,255));
+	//		glLineWidth(1);
+	//		s=1;
+	//	}
+	//	glBegin(GL_LINES);
+	//	glVertex(center);
+	//	glVertex(center+dir[1]*size*s);
+	//	glVertex(center);
+	//	glVertex(center+dir[3]*size*s);
+	//	glEnd();
+	//}
+public:
+
+	///singular vertices should be selected
+	static void GLDrawSingularities(const MeshType &mesh)
+	{
+		glPushAttrib(GL_ALL_ATTRIB_BITS);
+		glEnable(GL_COLOR_MATERIAL);
+		glDisable(GL_LIGHTING);
+		glDepthRange(0,0.999);
+		MyScalarType size=10;
+		glPointSize(size);
+		glBegin(GL_POINTS);
+		for (int i=0;i<mymesh.vert.size();i++)
+		{
+			if (mymesh.vert[i].IsD())continue;
+			if (!mymesh.vert[i].IsS())continue;
+			int mmatch;
+			bool IsSing=vcg::tri::CrossField<MeshType>::IsSingular(mymesh,mymesh.vert[i],mmatch);
+			if (!IsSing)continue;
+			assert(IsSing);
+			assert(mmatch!=0);
+			/*vcg::glColor(vcg::Color4b(255,0,0,255));*/
+			if (mmatch==1)vcg::glColor(vcg::Color4b(0,0,255,255));
+			else
+			if (mmatch==2)vcg::glColor(vcg::Color4b(255,0,0,255));
+			else
+			if (mmatch==3)vcg::glColor(vcg::Color4b(0,255,255,255));
+			
+			vcg::glVertex(mymesh.vert[i].P());
+			
+		}
+		glEnd();
+		glPopAttrib();
+	}
+	static void GLDrawFaceField(const MeshType &mesh)
+	{
+		srand(12345);
+		glPushAttrib(GL_ALL_ATTRIB_BITS);
+		glEnable(GL_COLOR_MATERIAL);
+		glDisable(GL_LIGHTING);
+		MyScalarType size=mymesh.bbox.Diag()/100.0;
+		vcg::Color4b c=vcg::Color4b(255,0,0,255);
+		for (int i=0;i<mymesh.face.size();i++)
+		{
+			if (mymesh.face[i].IsD())continue;
+			GLDrawField(mymesh,mymesh.face[i],size);
+		}
+
+		glPopAttrib();
+	}
+};
+}
\ No newline at end of file