//virtual public BoundingBox getBoundingBox() { return _boundingBox; }
protected void CalculateNormals(Mesh parent)
{
if(GlobalVars.verbose)
{
System.Console.WriteLine("Calculating vertex normals for mesh " + parent.id);
}
//Get the list of faces attached to a given vertex
for (int i = 0; i < parent.countVertices; i++)
{
//Sum together all the normals of the faces attached to this vertex
List<int> faceList = parent.vertexFaces[i];
Normal normalSum = new Normal(0,0,0);
for(int j = 0; j < faceList.Count; j++)
{
normalSum += parent.NormalForFace(faceList[j]);
}
normalSum.Normalize();
parent.normals[i] = normalSum;
}
}
private Normal CalculateNormal(Point3D point)
{
Normal result = new Normal();
float param_squared = _a * _a + _b * _b;
float x = point.X;
float y = point.Y;
float z = point.Z;
float sum_squared = x * x + y * y + z * z;
result.X = 4.0f * x * (sum_squared - param_squared);
result.Y = 4.0f * y * (sum_squared - param_squared + 2.0f * _a * _a);
result.Z = 4.0f * z * (sum_squared - param_squared);
result.Normalize();
return result;
}
