static void initCubeMesh() {
if (!meshLoaded) {
cubeMesh.load("./cube.mesh");
meshLoaded = true;
}
// set normals
shadeCube(cubeMesh);
// collect vertices from each face and map quads to triangles
vector<VertexPN> verts;
for (int i = 0; i < cubeMesh.getNumFaces(); ++i) {
const Mesh::Face f = cubeMesh.getFace(i);
Cvec3 pos;
Cvec3 normal;
if (g_flat)
normal = f.getNormal();
for (int j = 0; j < f.getNumVertices(); ++j) {
const Mesh::Vertex v = f.getVertex(j);
pos = v.getPosition();
if (!g_flat)
normal = v.getNormal();
verts.push_back(VertexPN(pos, normal));
if (j == 2) {
verts.push_back(VertexPN(pos, normal));
}
}
const Mesh::Vertex v = f.getVertex(0);
pos = v.getPosition();
if (!g_flat)
normal = v.getNormal();
verts.push_back(VertexPN(pos, normal));
}
// add vertices to cube geometry
int numVertices = verts.size();
if (!g_cubeGeometryPN) {
g_cubeGeometryPN.reset(new SimpleGeometryPN());
}
g_cubeGeometryPN->upload(&verts[0], numVertices);
}
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()));
}
}
}
// New function that initialize the dynamics simulation
static void initSimulation() {
g_tipPos.resize(g_bunnyMesh.getNumVertices(), Cvec3(0));
g_tipVelocity = g_tipPos;
g_tipAtRest = g_tipPos;
// TASK 1 TODO: initialize g_tipPos to "at-rest" hair tips in world coordinates
int numVertices = g_bunnyMesh.getNumVertices();
for(int i = 0; i < numVertices; i++) {
Mesh::Vertex v = g_bunnyMesh.getVertex(i);
g_tipAtRest[i] = v.getPosition() + (v.getNormal() * g_furHeight);
g_tipPos[i] = (getPathAccumRbt(g_world, g_bunnyNode) * RigTForm(g_tipAtRest[i])).getTranslation();
}
// Starts hair tip simulation
hairsSimulationCallback(0);
}
static void updateShellGeometry() {
float xs[] = {0, g_hairyness, 0};
float ys[] = {0, 0, g_hairyness};
vector<Cvec3> prevPos;
prevPos.resize(g_bunnyMesh.getNumFaces() * 3);
for (int level = 0; level < g_numShells; ++level) {
int counter = 0;
vector<VertexPNX> verts;
for (int i = 0; i < g_bunnyMesh.getNumFaces(); ++i) {
const Mesh::Face f = g_bunnyMesh.getFace(i);
for (int j = 0; j < f.getNumVertices(); ++j) {
const Mesh::Vertex v = f.getVertex(j);
int index = v.getIndex();
Cvec3 pos = v.getPosition();
Cvec3 normal = v.getNormal();
Cvec2 c = Cvec2(xs[j], ys[j]);
Cvec3 n = normal * g_furHeight / g_numShells;
Cvec3 s = pos + (n * g_numShells);
Cvec3 t = world2bunny(g_tipPos[index]);
Cvec3 d = (t - s) / ((g_numShells + 1) * g_numShells / 2);
/* Cvec3 d = (world2bunny(g_tipPos[index]) - (normal * g_furHeight)) / (g_numShells - 1); */
if (level == 0) {
prevPos[counter] = pos;
verts.push_back(VertexPNX(pos, n, c));
}
else {
Cvec3 new_position = prevPos[counter] + n + (d * level);
verts.push_back(VertexPNX(new_position, new_position - prevPos[counter], c));
prevPos[counter] = new_position;
}
++counter;
}
}
int numVertices = verts.size();
g_bunnyShellGeometries[level]->upload(&verts[0], numVertices);
verts.clear();
}
}
// New function that initialize the dynamics simulation
static void initSimulation() {
bunnyTransformSet = true;
bunnyTransform = (getPathAccumRbt(g_world, g_bunnyNode));
g_tipPos.resize(g_bunnyMesh.getNumVertices(), Cvec3(0));
g_tipStartPos.resize(g_bunnyMesh.getNumVertices(), Cvec3(0));
g_tipVelocity = g_tipPos;
// TASK 1 TODO: initialize g_tipPos to "at-rest" hair tips in world coordinates
for (int i = 0; i < g_bunnyMesh.getNumVertices(); ++i) {
const Mesh::Vertex v = g_bunnyMesh.getVertex(i);
Cvec3 pos = v.getPosition();
Cvec3 normal = v.getNormal();
g_tipPos[i] = bunny2world(pos + normal * g_furHeight);
g_tipStartPos[i] = bunny2world(pos + normal * g_furHeight);
}
// Starts hair tip simulation
hairsSimulationCallback(0);
}
static void initBunnyMeshes() {
g_bunnyMesh.load("bunny.mesh");
// TODO: Init the per vertex normal of g_bunnyMesh, using codes from asst7
// ...
shadeCube(g_bunnyMesh);
// cout << "Finished shading bunny" << endl;
// TODO: Initialize g_bunnyGeometry from g_bunnyMesh, similar to
vector<VertexPN> verts;
for (int i = 0; i < g_bunnyMesh.getNumFaces(); ++i) {
const Mesh::Face f = g_bunnyMesh.getFace(i);
Cvec3 pos;
Cvec3 normal;
if (g_flat)
normal = f.getNormal();
for (int j = 0; j < f.getNumVertices(); ++j) {
const Mesh::Vertex v = f.getVertex(j);
pos = v.getPosition();
if (!g_flat)
normal = v.getNormal();
verts.push_back(VertexPN(pos, normal));
}
}
// add vertices to bunny geometry
int numVertices = verts.size();
g_bunnyGeometry.reset(new SimpleGeometryPN());
g_bunnyGeometry->upload(&verts[0], numVertices);
// Now allocate array of SimpleGeometryPNX to for shells, one per layer
g_bunnyShellGeometries.resize(g_numShells);
for (int i = 0; i < g_numShells; ++i) {
g_bunnyShellGeometries[i].reset(new SimpleGeometryPNX());
}
}
static void animateCube(int ms) {
float t = (float) ms / (float) g_msBetweenKeyFrames;
// scale all vertices in cube
for (int i = 0; i < cubeMesh.getNumVertices(); ++i) {
const Mesh::Vertex v = cubeMesh.getVertex(i);
Cvec3 pos = v.getPosition();
double factor = (1 + (float(g_div_level)/10)) * ((-1 * sin((double) (g_horiz_scale * ms) / (1000 * (vertex_speeds[i] + .5))) + 1) / 2 + .5);
pos[0] = vertex_signs[i][0] * (factor / sqrt(3));
pos[1] = vertex_signs[i][1] * (factor / sqrt(3));
pos[2] = vertex_signs[i][2] * (factor / sqrt(3));
v.setPosition(pos);
}
// copy mesh to temporary mesh for rendering
Mesh renderMesh = cubeMesh;
// subdivision
for (int i = 0; i < g_div_level; ++i) {
collectFaceVertices(renderMesh);
collectEdgeVertices(renderMesh);
collectVertexVertices(renderMesh);
renderMesh.subdivide();
}
// set normals
shadeCube(renderMesh);
// collect vertices for each face
vector<VertexPN> verts;
int q = 0;
for (int i = 0; i < renderMesh.getNumFaces(); ++i) {
const Mesh::Face f = renderMesh.getFace(i);
Cvec3 pos;
Cvec3 normal;
for (int j = 0; j < f.getNumVertices(); ++j) {
const Mesh::Vertex v = f.getVertex(j);
pos = v.getPosition();
if (!g_flat)
normal = v.getNormal();
else
normal = f.getNormal();
verts.push_back(VertexPN(pos, normal));
if (j == 2) {
verts.push_back(VertexPN(pos, normal));
}
}
const Mesh::Vertex v = f.getVertex(0);
pos = v.getPosition();
if (!g_flat)
normal = v.getNormal();
else
normal = f.getNormal();
verts.push_back(VertexPN(pos, normal));
}
// dump into geometry
int numVertices = verts.size();
g_cubeGeometryPN->upload(&verts[0], numVertices);
glutPostRedisplay();
glutTimerFunc(1000/g_animateFramesPerSecond,
animateCube,
ms + 1000/g_animateFramesPerSecond);
}