int InitGLObjects() // Initialize Objects
{
if (!ReadObject("Data/Object2.txt", &obj)) // Read Object2 Into obj
{
return FALSE; // If Failed Return False
}
SetConnectivity(&obj); // Set Face To Face Connectivity
for (unsigned int i=0;i<obj.nPlanes;i++) // Loop Through All Object Planes
CalcPlane(obj, &(obj.planes[i])); // Compute Plane Equations For All Faces
return TRUE; // Return True
}
Object *InitObject(char *objfile)
{
int nf;
Object *obj;
if((obj = LoadObject(objfile)) != NULL){
SetConnectivity(obj);
for(nf=0; nf < obj->nFaces; nf++)
CalculatePlane(obj, nf);
}
return obj;
}
bool SHADOW_MODEL::GenerateTorus(float innerRadius, float outerRadius)
{
int torusPrecision=24;
numVertices=(torusPrecision+1)*(torusPrecision+1);
numIndices=2*torusPrecision*torusPrecision*3;
numTriangles=numIndices/3;
vertices=new SHADOW_MODEL_VERTEX[numVertices];
if(!vertices)
{
errorLog.OutputError("Unable to allocate memory for torus vertices");
return false;
}
indices=new unsigned int[numIndices];
if(!indices)
{
errorLog.OutputError("Unable to allocate memory for torus indices");
return false;
}
//calculate the first ring - inner radius 4, outer radius 1.5
for(int i=0; i<torusPrecision+1; i++)
{
vertices[i].position=VECTOR3D(innerRadius, 0.0f, 0.0f).GetRotatedZ(i*360.0f/torusPrecision)+
VECTOR3D(outerRadius, 0.0f, 0.0f);
vertices[i].normal=VECTOR3D(0.0f, 0.0f, 1.0f).
CrossProduct(VECTOR3D(0.0f, -1.0f, 0.0f).GetRotatedZ(i*360.0f/torusPrecision));
}
//rotate this to get other rings
for(int ring=1; ring<torusPrecision+1; ring++)
{
for(int i=0; i<torusPrecision+1; i++)
{
vertices[ring*(torusPrecision+1)+i].position=vertices[i].position.GetRotatedY(ring*360.0f/torusPrecision);
vertices[ring*(torusPrecision+1)+i].normal=vertices[i].normal.GetRotatedY(ring*360.0f/torusPrecision);
}
}
//calculate the indices
for(int ring=0; ring<torusPrecision; ring++)
{
for(int i=0; i<torusPrecision; i++)
{
indices[((ring*torusPrecision+i)*2)*3+0]=ring*(torusPrecision+1)+i;
indices[((ring*torusPrecision+i)*2)*3+1]=(ring+1)*(torusPrecision+1)+i;
indices[((ring*torusPrecision+i)*2)*3+2]=ring*(torusPrecision+1)+i+1;
indices[((ring*torusPrecision+i)*2+1)*3+0]=ring*(torusPrecision+1)+i+1;
indices[((ring*torusPrecision+i)*2+1)*3+1]=(ring+1)*(torusPrecision+1)+i;
indices[((ring*torusPrecision+i)*2+1)*3+2]=(ring+1)*(torusPrecision+1)+i+1;
}
}
//Calculate the plane equation for each face
planeEquations=new PLANE[numTriangles];
if(!planeEquations)
{
errorLog.OutputError("Unable to allocate memory for %d planes", numTriangles);
return false;
}
for(unsigned int j=0; j<numTriangles; ++j)
{
planeEquations[j].SetFromPoints(vertices[indices[j*3+0]].position,
vertices[indices[j*3+1]].position,
vertices[indices[j*3+2]].position);
}
//Create space for the "is facing light" booleans
isFacingLight=new bool[numTriangles];
if(!isFacingLight)
{
errorLog.OutputError("Unable to allocate memory for %d booleans", numTriangles);
return false;
}
//Create space for connectivity data
neighbourIndices=new GLint[numTriangles*3];
if(!neighbourIndices)
{
errorLog.OutputError("Unable to allocate memory for %d neighbour indices", numTriangles*3);
return false;
}
//Create space for "is silhouette edge" booleans
isSilhouetteEdge=new bool[numTriangles*3];
if(!isSilhouetteEdge)
{
errorLog.OutputError("Unable to allocate memory for %d booleans", numTriangles*3);
return false;
}
//Calculate the neighbours
SetConnectivity();
return true;
}
