Added display routine for debugging.

Calculation of the 3rd coordinate seems to work well -- at least for a sphere.

cmath3d/TriangleMesh.h

@@ -107,6 +107,7 @@ class ActiveMesh
 	void displayMesh(void);
 	void displayVertexAndNeigs(void);
 	void displayQuadricSurface(void);
+	void displayTEST(void);
 };
 
 #endif

src/graphics.cpp

@@ -49,6 +49,7 @@ int last_x = 0, last_y = 0;
 bool showWholeMesh=true;
 bool showVertexSurface=false;
 bool showQuadricSurface=false;
+bool showTEST=false;
 
 
 ///manage \e count steps of the simulation and then print and draw
@@ -145,6 +146,72 @@ void ActiveMesh::displayVertexAndNeigs(void)
 	glEnd();
 }
 
+void ActiveMesh::displayTEST(void)
+{
+	//get surface params
+	float surf_coeff[10];
+	//CalcQuadricSurface_Taubin(VertexID,surf_coeff);
+	CalcQuadricSurface_sphere(5.0f,params.sceneCentre,surf_coeff);
+	std::cout << "\nsurface: " << surf_coeff[0] << " + "
+	          << surf_coeff[1] << "*x + "
+	          << surf_coeff[2] << "*y + "
+	          << surf_coeff[3] << "*z + "
+	          << surf_coeff[4] << "*xy + "
+	          << surf_coeff[5] << "*xz + "
+	          << surf_coeff[6] << "*yz + "
+	          << surf_coeff[7] << "*x*x + "
+	          << surf_coeff[8] << "*y*y + "
+	          << surf_coeff[9] << "*z*z = 0\n";
+
+	glPointSize(2.0f);
+	glBegin(GL_POINTS);
+	glColor3f(0.0f,1.0f,0.0f);
+
+		//determine triangle vertices
+		const Vector3FC& v1=Pos[VertexID];
+		std::cout << "v1: (" << v1.x << "," << v1.y << "," << v1.z << ")\n";
+
+			Vector3F point=v1;
+
+			//backup...
+			Vector3F origPoint(point);
+
+			//adapt the point
+			std::cout << "dist=" <<
+			GetClosestPointOnQuadricSurface(point,surf_coeff);
+
+			//display the point
+			glColor3f(0.0f,1.0f,0.0f);
+			//glVertex3f(point.x,point.y,point.z);
+
+			float tmp1,tmp2;
+			if (GetPointOnQuadricSurface(v1.x,v1.y,tmp1,tmp2,surf_coeff))
+			{
+				glVertex3f(v1.x,v1.y,tmp1);
+				glVertex3f(v1.x,v1.y,tmp2);
+			}
+			if (GetPointOnQuadricSurface(v1.x,v1.z,tmp1,tmp2,surf_coeff))
+			{
+				glVertex3f(v1.x,tmp1,v1.z);
+				glVertex3f(v1.x,tmp2,v1.z);
+			}
+			if (GetPointOnQuadricSurface(v1.y,v1.z,tmp1,tmp2,surf_coeff))
+			{
+				glVertex3f(tmp1,v1.y,v1.z);
+				glVertex3f(tmp2,v1.y,v1.z);
+			}
+			/*
+			std::cout << "  (" << origPoint.x << "," << origPoint.y << "," << origPoint.z
+			          << ") -> ("
+			          << point.x << "," << point.y << "," << point.z << ")\n";
+			*/
+
+			glColor3f(0.0f,1.0f,1.0f);
+			//glVertex3f(origPoint.x,origPoint.y,origPoint.z);
+
+	glEnd();
+}
+
 void ActiveMesh::displayQuadricSurface(void)
 {
 	//get surface params
@@ -177,7 +244,7 @@ void ActiveMesh::displayQuadricSurface(void)
 	//FOR CYCLE BEGIN
 	//over all triangles
 	//for (unsigned int t=0; t < neigsT.size(); ++t)
-	for (unsigned int t=0; t < 2; ++t)
+	for (unsigned int t=0; t < 1; ++t)
 	{
 		//determine triangle vertices
 		const Vector3FC& v1=Pos[ID[3*neigsT[t] +0]];
@@ -259,6 +326,7 @@ void display(void)
 	if (showWholeMesh) mesh.displayMesh();
 	if (showVertexSurface) mesh.displayVertexAndNeigs();
 	if (showQuadricSurface) mesh.displayQuadricSurface();
+	if (showTEST) mesh.displayTEST();
 
 	glFlush();
 	glutSwapBuffers();
@@ -403,6 +471,10 @@ void keyboard(unsigned char key, int mx, int my)
 				showQuadricSurface^=true;
 				glutPostRedisplay();
 				break;
+			case 'T':
+				showTEST^=true;
+				glutPostRedisplay();
+				break;
 
 			case 'i': //inspect a cell
 				GetSceneViewSize(windowSizeX,windowSizeY, xVisF,xVisT,yVisF,yVisT);