// Object Creation Function Definitions
std::vector<std::shared_ptr<Shape>> MakeShapes(const std::string &name,
const Transform *object2world,
const Transform *world2object,
bool reverseOrientation,
const ParamSet ¶mSet) {
std::vector<std::shared_ptr<Shape>> shapes;
std::shared_ptr<Shape> s;
if (name == "sphere")
s = CreateSphereShape(object2world, world2object, reverseOrientation,
paramSet);
// Create remaining single _Shape_ types
else if (name == "cylinder")
s = CreateCylinderShape(object2world, world2object, reverseOrientation,
paramSet);
else if (name == "disk")
s = CreateDiskShape(object2world, world2object, reverseOrientation,
paramSet);
else if (name == "cone")
s = CreateConeShape(object2world, world2object, reverseOrientation,
paramSet);
else if (name == "paraboloid")
s = CreateParaboloidShape(object2world, world2object,
reverseOrientation, paramSet);
else if (name == "hyperboloid")
s = CreateHyperboloidShape(object2world, world2object,
reverseOrientation, paramSet);
if (s != nullptr) shapes.push_back(s);
// Create multiple-_Shape_ types
else if (name == "curve")
shapes = CreateCurveShape(object2world, world2object,
reverseOrientation, paramSet);
else if (name == "trianglemesh")
shapes = CreateTriangleMeshShape(object2world, world2object,
reverseOrientation, paramSet,
&graphicsState.floatTextures);
else if (name == "plymesh")
shapes = CreatePLYMesh(object2world, world2object, reverseOrientation,
paramSet, &graphicsState.floatTextures);
else if (name == "heightfield")
shapes = CreateHeightfield(object2world, world2object,
reverseOrientation, paramSet);
else if (name == "loopsubdiv")
shapes = CreateLoopSubdiv(object2world, world2object,
reverseOrientation, paramSet);
else if (name == "nurbs")
shapes = CreateNURBS(object2world, world2object, reverseOrientation,
paramSet);
else
Warning("Shape \"%s\" unknown.", name.c_str());
paramSet.ReportUnused();
return shapes;
}
void Heightfield::Refine(vector<Reference<Shape> > &refined) const {
int ntris = 2*(nx-1)*(ny-1);
refined.reserve(ntris);
int *verts = new int[3*ntris];
Point *P = new Point[nx*ny];
float *uvs = new float[2*nx*ny];
int nverts = nx*ny;
int x, y;
// Compute heightfield vertex positions
int pos = 0;
for (y = 0; y < ny; ++y) {
for (x = 0; x < nx; ++x) {
P[pos].x = uvs[2*pos] = (float)x / (float)(nx-1);
P[pos].y = uvs[2*pos+1] = (float)y / (float)(ny-1);
P[pos].z = z[pos];
++pos;
}
}
// Fill in heightfield vertex offset array
int *vp = verts;
for (y = 0; y < ny-1; ++y) {
for (x = 0; x < nx-1; ++x) {
#define VERT(x,y) ((x)+(y)*nx)
*vp++ = VERT(x, y);
*vp++ = VERT(x+1, y);
*vp++ = VERT(x+1, y+1);
*vp++ = VERT(x, y);
*vp++ = VERT(x+1, y+1);
*vp++ = VERT(x, y+1);
}
#undef VERT
}
ParamSet paramSet;
paramSet.AddInt("indices", verts, 3*ntris);
paramSet.AddFloat("uv", uvs, 2 * nverts);
paramSet.AddPoint("P", P, nverts);
refined.push_back(CreateTriangleMeshShape(ObjectToWorld, WorldToObject, ReverseOrientation, paramSet));
delete[] P;
delete[] uvs;
delete[] verts;
}
