// Specifying shell geometries based on g_tipPos, g_furHeight, and g_numShells.
// You need to call this function whenver the shell needs to be updated
static void updateShellGeometry() {
// TASK 1 and 3 TODO: finish this function as part of Task 1 and Task 3
int numVertices = g_bunnyMesh.getNumVertices();
g_bunnyMeshCopy = Mesh(g_bunnyMesh);
createSmoothNormals(g_bunnyMeshCopy);
RigTForm path = getPathAccumRbt(g_world, g_bunnyNode);
for(int i = 0; i < g_numShells; i++) {
// iterate through each vertex in the mesh
for(int j = 0; j < numVertices; j++) {
Cvec3 normal = g_bunnyMesh.getVertex(j).getNormal();
Cvec3 n = normal * (((double) g_furHeight) / g_numShells);
Cvec3 s = (path * RigTForm(g_tipAtRest[j])).getTranslation();
Cvec3 d = (g_tipPos[j] - s) * (2.0 / (g_numShells * (g_numShells - 1)));
Mesh::Vertex v = g_bunnyMeshCopy.getVertex(j);
Cvec3 vPos = v.getPosition();
Cvec3 newPos = vPos + (n + (d * (i+1)));
v.setPosition(newPos);
v.setNormal(newPos - vPos);
}
uploadMeshToSimpleGeometryPNX(g_bunnyMeshCopy, *(g_bunnyShellGeometries[i]), g_hairyness);
}
}
static void simpleShadeCube(Mesh& mesh) {
Cvec3 normal = Cvec3(0, 1, 0);
for (int i = 0; i < mesh.getNumFaces(); ++i) {
const Mesh::Face f = mesh.getFace(i);
Cvec3 facenorm = f.getNormal();
for (int j = 0; j < f.getNumVertices(); ++j) {
const Mesh::Vertex v = f.getVertex(j);
v.setNormal(facenorm);
}
}
}
static void shadeCube(Mesh& mesh) {
Cvec3 normal = Cvec3(0, 0, 0);
for (int i = 0; i < mesh.getNumVertices(); ++i) {
mesh.getVertex(i).setNormal(normal);
}
for (int i = 0; i < mesh.getNumFaces(); ++i) {
const Mesh::Face f = mesh.getFace(i);
Cvec3 facenorm = f.getNormal();
for (int j = 0; j < f.getNumVertices(); ++j) {
const Mesh::Vertex v = f.getVertex(j);
v.setNormal(facenorm + v.getNormal());
}
}
for (int i = 0; i < mesh.getNumVertices(); ++i) {
const Mesh::Vertex v = mesh.getVertex(i);
if (norm2(v.getNormal()) > .001) {
v.setNormal(normalize(v.getNormal()));
}
}
}
static void updateMeshNormals(Mesh &mesh) {
for (int i = 0, n = mesh.getNumVertices(); i < n; i++) {
Cvec3 vectorSum = Cvec3();
Mesh::Vertex v = mesh.getVertex(i);
Mesh::VertexIterator vertexIter(v.getIterator()), iterOrigin(vertexIter);
// walk around the vertex
do {
vectorSum += vertexIter.getFace().getNormal();
} while (++vertexIter != iterOrigin);
if (dot(vectorSum, vectorSum) > CS175_EPS2) {
vectorSum.normalize();
}
v.setNormal(vectorSum);
}
}
