void MarchingCubes::drawTriangleWithNormals(const Vec3f &n1, const Vec3f &p1,
const Vec3f &n2, const Vec3f &p2,
const Vec3f &n3, const Vec3f &p3) {
int num_marching_cubes_tris = marching_cubes_tri_indices.size();
marching_cubes_verts.push_back(VBOPosNormal(p1,n1));
marching_cubes_verts.push_back(VBOPosNormal(p2,n2));
marching_cubes_verts.push_back(VBOPosNormal(p3,n3));
marching_cubes_tri_indices.push_back(VBOIndexedTri(num_marching_cubes_tris*3+0,
num_marching_cubes_tris*3+1,
num_marching_cubes_tris*3+2));
}
void Mesh::SetupFloor() {
Vec3f diff = bbox.getMax()-bbox.getMin();
// create vertices just a bit bigger than the bounding box
Vec3f a = bbox.getMin() + Vec3f(-0.75*diff.x(),0,-0.75*diff.z());
Vec3f b = bbox.getMin() + Vec3f( 1.75*diff.x(),0,-0.75*diff.z());
Vec3f c = bbox.getMin() + Vec3f(-0.75*diff.x(),0, 1.75*diff.z());
Vec3f d = bbox.getMin() + Vec3f( 1.75*diff.x(),0, 1.75*diff.z());
Vec3f normal = ComputeNormal(a,c,d);
floor_quad_verts.push_back(VBOPosNormal(a,normal));
floor_quad_verts.push_back(VBOPosNormal(c,normal));
floor_quad_verts.push_back(VBOPosNormal(d,normal));
floor_quad_verts.push_back(VBOPosNormal(b,normal));
glBindBuffer(GL_ARRAY_BUFFER,floor_quad_verts_VBO);
glBufferData(GL_ARRAY_BUFFER,sizeof(VBOPosNormal)*4,&floor_quad_verts[0],GL_STATIC_DRAW);
}
void Mesh::SetupMesh(triangleshashtype &triSet, GLuint VBO, std::vector<VBOPosNormal> &VBO_verts_vector) {
for (auto iter = triSet.begin(); iter != triSet.end(); iter++) {
Triangle *t = iter->second;
Vec3f a = (*t)[0]->getPos();
Vec3f b = (*t)[1]->getPos();
Vec3f c = (*t)[2]->getPos();
Vec3f na = ComputeNormal(a,b,c);
Vec3f nb = na;
Vec3f nc = na;
if (args->gouraud_normals) {
na = (*t)[0]->getGouraudNormal();
nb = (*t)[1]->getGouraudNormal();
nc = (*t)[2]->getGouraudNormal();
}
VBO_verts_vector.push_back(VBOPosNormal(a,na));
VBO_verts_vector.push_back(VBOPosNormal(b,nb));
VBO_verts_vector.push_back(VBOPosNormal(c,nc));
}
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER,
sizeof(VBOPosNormal) * numTriangles(triSet) * 3,
&VBO_verts_vector[0],
GL_STATIC_DRAW);
}
