void GLMesh::fillBuffers(const std::vector<Eigen::Vector3f>& colors)
{
vertices.resize(3*(mesh.faces.size() - mesh.boundaries.size()));
for (FaceCIter f = mesh.faces.begin(); f != mesh.faces.end(); f++) {
if (!f->isBoundary()) {
int i = 0;
int fIdx = 3*f->index;
HalfEdgeCIter h = f->he;
do {
VertexCIter v = h->vertex;
// set vertex
vertices[fIdx+i].position = v->position.cast<float>();
vertices[fIdx+i].normal = v->normal().cast<float>();
vertices[fIdx+i].color = colors[f->index];
vertices[fIdx+i].uv = v->uv.cast<float>();
i++;
h = h->next;
} while (h != f->he);
// set barycenters
vertices[fIdx+0].barycenter = Eigen::Vector3f(1.0, 0.0, 0.0);
vertices[fIdx+1].barycenter = Eigen::Vector3f(0.0, 1.0, 0.0);
vertices[fIdx+2].barycenter = Eigen::Vector3f(0.0, 0.0, 1.0);
}
}
}
void GLMesh::fillPickBuffers()
{
int tris = (int)(mesh.faces.size() - mesh.boundaries.size());
// add faces
int i = 0;
pickVertices.resize(3*tris);
for (FaceCIter f = mesh.faces.begin(); f != mesh.faces.end(); f++) {
if (!f->isBoundary()) {
int j = 0;
Eigen::Vector3f color = elementColor(f->index);
HalfEdgeCIter h = f->he;
do {
// set vertex
pickVertices[3*i+j].position = h->vertex->position.cast<float>();
pickVertices[3*i+j].color = color;
j++;
h = h->next;
} while (h != f->he);
i++;
}
}
// add vertex faces
int verts = 0;
for (VertexCIter v = mesh.vertices.begin(); v != mesh.vertices.end(); v++) {
verts += v->degree();
if (v->isBoundary()) verts -= 1;
}
pickVertices.resize(3*(tris + verts));
for (VertexCIter v = mesh.vertices.begin(); v != mesh.vertices.end(); v++) {
Eigen::Vector3d n = 0.0015*v->normal();
Eigen::Vector3f p1 = (v->position + n).cast<float>();
Eigen::Vector3f color = elementColor(tris + v->index);
HalfEdgeCIter h = v->he;
do {
if (!h->onBoundary) {
Eigen::Vector3f p2 = (h->next->vertex->position + n).cast<float>();
Eigen::Vector3f p3 = (h->next->next->vertex->position + n).cast<float>();
pickVertices[3*i+0].position = p1;
pickVertices[3*i+1].position = p1 + 0.125*(p2 - p1);
pickVertices[3*i+2].position = p1 + 0.125*(p3 - p1);
pickVertices[3*i+0].color = pickVertices[3*i+1].color = pickVertices[3*i+2].color = color;
i++;
}
h = h->flip->next;
} while (h != v->he);
}
}