void Implicit::Render()
{
// Draw bounding box for debugging
Bbox b = GetBoundingBox();
Vector3<float> & v0 = b.pMin;
Vector3<float> & v1 = b.pMax;
if(mSelected) {
glLineWidth(2.0f);
glColor3f(0.8f,0.8f,0.8f);
}
else glColor3f(0.1f,0.1f,0.1f);
glBegin(GL_LINE_STRIP);
glVertex3f(v0[0], v0[1], v0[2]);
glVertex3f(v1[0], v0[1], v0[2]);
glVertex3f(v1[0], v1[1], v0[2]);
glVertex3f(v0[0], v1[1], v0[2]);
glVertex3f(v0[0], v0[1], v0[2]);
glEnd();
glBegin(GL_LINE_STRIP);
glVertex3f(v0[0], v0[1], v1[2]);
glVertex3f(v1[0], v0[1], v1[2]);
glVertex3f(v1[0], v1[1], v1[2]);
glVertex3f(v0[0], v1[1], v1[2]);
glVertex3f(v0[0], v0[1], v1[2]);
glEnd();
glBegin(GL_LINES);
glVertex3f(v0[0], v0[1], v0[2]);
glVertex3f(v0[0], v0[1], v1[2]);
glVertex3f(v1[0], v0[1], v0[2]);
glVertex3f(v1[0], v0[1], v1[2]);
glVertex3f(v0[0], v1[1], v0[2]);
glVertex3f(v0[0], v1[1], v1[2]);
glVertex3f(v1[0], v1[1], v0[2]);
glVertex3f(v1[0], v1[1], v1[2]);
glEnd();
glLineWidth(1.0f);
glPushMatrix();
glMultMatrixf(mTransform.ToGLMatrix().GetArrayPtr());
Geometry * mesh = dynamic_cast<Geometry *>(mMesh);
if (mesh == NULL)
std::cerr << "Error: implicit geometry not triangulated, add call to triangulate()" << std::endl;
else {
mesh->SetShowNormals(mShowNormals);
mesh->SetWireframe(mWireframe);
mesh->SetOpacity(mOpacity);
mesh->Render();
}
if (mVisualizationMode == Gradients) {
if(typeid(*mMesh) == typeid(SimpleMesh)){
SimpleMesh * ptr = static_cast<SimpleMesh*>(mMesh);
const std::vector<SimpleMesh::Vertex>& verts = ptr->GetVerts();
glDisable(GL_LIGHTING);
Matrix4x4<float> M = GetTransform().Transpose();
glColor3f(0, 0, 1);
glBegin(GL_LINES);
for(unsigned int i=0; i < verts.size(); i++){
const Vector3<float> vObject = verts.at(i).pos;
// Transform vertex position to world space
Vector4<float> vWorld = GetTransform() * Vector4<float>(vObject[0],vObject[1],vObject[2],1);
// Get gradient in world space
Vector3<float> nWorld = GetGradient(vWorld[0], vWorld[1], vWorld[2]);
// Transform gradient to object space
Vector4<float> nObject = M * Vector4<float>(nWorld[0],nWorld[1],nWorld[2],0);
Vector3<float> n = Vector3<float>(nObject[0], nObject[1], nObject[2]);
glVertex3fv(vObject.GetArrayPtr());
glVertex3fv((vObject + n*0.1).GetArrayPtr());
}
glEnd();
}
else {
std::cerr << "No Gradient visualization mode implemented for mesh type: " << typeid(*mMesh).name() << std::endl;
}
}
glPopMatrix();
GLObject::Render();
}
void HalfEdgeMesh::Render()
{
glEnable(GL_LIGHTING);
glMatrixMode(GL_MODELVIEW);
// Apply transform
glPushMatrix(); // Push modelview matrix onto stack
// Convert transform-matrix to format matching GL matrix format
// Load transform into modelview matrix
glMultMatrixf( mTransform.ToGLMatrix().GetArrayPtr() );
if (mWireframe)
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
// Draw geometry
glBegin(GL_TRIANGLES);
const int numTriangles = GetNumFaces();
for (int i = 0; i < numTriangles; i++){
Face & face = f(i);
HalfEdge* edge = &e(face.edge);
Vertex & v1 = v(edge->vert);
edge = &e(edge->next);
Vertex & v2 = v(edge->vert);
edge = &e(edge->next);
Vertex & v3 = v(edge->vert);
if (mVisualizationMode == CurvatureVertex) {
glColor3fv(v1.color.GetArrayPtr());
glNormal3fv(v1.normal.GetArrayPtr());
glVertex3fv(v1.pos.GetArrayPtr());
glColor3fv(v2.color.GetArrayPtr());
glNormal3fv(v2.normal.GetArrayPtr());
glVertex3fv(v2.pos.GetArrayPtr());
glColor3fv(v3.color.GetArrayPtr());
glNormal3fv(v3.normal.GetArrayPtr());
glVertex3fv(v3.pos.GetArrayPtr());
}
else {
glColor3fv(face.color.GetArrayPtr());
glNormal3fv(face.normal.GetArrayPtr());
glVertex3fv(v1.pos.GetArrayPtr());
glVertex3fv(v2.pos.GetArrayPtr());
glVertex3fv(v3.pos.GetArrayPtr());
}
}
glEnd();
// Mesh normals by courtesy of Richard Khoury
if (mShowNormals)
{
glDisable(GL_LIGHTING);
glBegin(GL_LINES);
const int numTriangles = GetNumFaces();
for (int i = 0; i < numTriangles; i++){
Face & face = f(i);
HalfEdge* edge = &e(face.edge);
Vertex & v1 = v(edge->vert);
edge = &e(edge->next);
Vertex & v2 = v(edge->vert);
edge = &e(edge->next);
Vertex & v3 = v(edge->vert);
Vector3<float> faceStart = (v1.pos + v2.pos + v3.pos) / 3.0f;
Vector3<float> faceEnd = faceStart + face.normal*0.1;
glColor3f(1,0,0); // Red for face normal
glVertex3fv(faceStart.GetArrayPtr());
glVertex3fv(faceEnd.GetArrayPtr());
glColor3f(0,1,0); // Vertex normals in Green
glVertex3fv(v1.pos.GetArrayPtr());
glVertex3fv((v1.pos + v1.normal*0.1).GetArrayPtr());
glVertex3fv(v2.pos.GetArrayPtr());
glVertex3fv((v2.pos + v2.normal*0.1).GetArrayPtr());
glVertex3fv(v3.pos.GetArrayPtr());
glVertex3fv((v3.pos + v3.normal*0.1).GetArrayPtr());
}
glEnd();
glEnable(GL_LIGHTING);
}
if (mWireframe)
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
// Restore modelview matrix
glPopMatrix();
GLObject::Render();
}
void SimpleMesh::Render()
{
glEnable(GL_LIGHTING);
glMatrixMode(GL_MODELVIEW);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// Apply transform
glPushMatrix(); // Push modelview matrix onto stack
// Convert transform-matrix to format matching GL matrix format
// Load transform into modelview matrix
glMultMatrixf( mTransform.ToGLMatrix().GetArrayPtr() );
if (mWireframe)
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
// Draw geometry
glBegin(GL_TRIANGLES);
const int numFaces = mFaces.size();
for (int i = 0; i < numFaces; i++){
Face& triangle = mFaces[i];
Vector3<float>& p0 = mVerts[triangle.v1].pos;
Vector3<float>& p1 = mVerts[triangle.v2].pos;
Vector3<float>& p2 = mVerts[triangle.v3].pos;
if (mVisualizationMode == CurvatureVertex) {
Vector3<float>& c1 = mVerts.at(triangle.v1).color;
glColor4f(c1[0], c1[1], c1[2], mOpacity);
glNormal3fv(mVerts.at(triangle.v1).normal.GetArrayPtr());
glVertex3fv(p0.GetArrayPtr());
Vector3<float>& c2 = mVerts.at(triangle.v2).color;
glColor4f(c2[0], c2[1], c2[2], mOpacity);
glNormal3fv(mVerts.at(triangle.v2).normal.GetArrayPtr());
glVertex3fv(p1.GetArrayPtr());
Vector3<float>& c3 = mVerts.at(triangle.v3).color;
glColor4f(c3[0], c3[1], c3[2], mOpacity);
glNormal3fv(mVerts.at(triangle.v3).normal.GetArrayPtr());
glVertex3fv(p2.GetArrayPtr());
}
else {
Vector3<float>& color = triangle.color;
glColor4f(color[0], color[1], color[2], mOpacity);
glNormal3fv(triangle.normal.GetArrayPtr());
glVertex3fv(p0.GetArrayPtr());
glVertex3fv(p1.GetArrayPtr());
glVertex3fv(p2.GetArrayPtr());
}
}
glEnd();
// Mesh normals by courtesy of Richard Khoury
if (mShowNormals)
{
glDisable(GL_LIGHTING);
glBegin(GL_LINES);
for (unsigned int i = 0; i < mFaces.size(); i++){
Face & face = mFaces.at(i);
Vertex & v1 = mVerts.at(face.v1);
Vertex & v2 = mVerts.at(face.v2);
Vertex & v3 = mVerts.at(face.v3);
Vector3<float> faceStart = (v1.pos + v2.pos + v3.pos) / 3.0f;
Vector3<float> faceEnd = faceStart + face.normal*0.1;
glColor3f(1,0,0); // Red for face normal
glVertex3fv(faceStart.GetArrayPtr());
glVertex3fv(faceEnd.GetArrayPtr());
glColor3f(0,1,0); // Vertex normals in Green
glVertex3fv(v1.pos.GetArrayPtr());
glVertex3fv((v1.pos + v1.normal*0.1).GetArrayPtr());
glVertex3fv(v2.pos.GetArrayPtr());
glVertex3fv((v2.pos + v2.normal*0.1).GetArrayPtr());
glVertex3fv(v3.pos.GetArrayPtr());
glVertex3fv((v3.pos + v3.normal*0.1).GetArrayPtr());
}
glEnd();
glEnable(GL_LIGHTING);
}
if (mWireframe)
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
// Restore modelview matrix
glPopMatrix();
GLObject::Render();
}
