public Point3[] AxesCoordinates()
{
Point3[] pts = new Point3[4];
// Create coordinate axes:
pts[0] = new Point3(2 * side, -side, -side, 1);
pts[1] = new Point3(-side, 2 * side, -side, 1);
pts[2] = new Point3(-side, -side, 2 * side, 1);
pts[3] = new Point3(-side, -side, -side, 1);
return pts;
}
public Point3 Spherical(float r, float theta, float phi)
{
Point3 pt = new Point3();
float snt = (float)Math.Sin(theta * Math.PI / 180);
float cnt = (float)Math.Cos(theta * Math.PI / 180);
float snp = (float)Math.Sin(phi * Math.PI / 180);
float cnp = (float)Math.Cos(phi * Math.PI / 180);
pt.X = r * snt * cnp;
pt.Y = r * cnt;
pt.Z = -r * snt * snp;
pt.W = 1;
return pt;
}
public Point3 Cylindrical(float r, float theta, float y)
{
Point3 pt = new Point3();
float sn = (float)Math.Sin(theta * Math.PI / 180);
float cn = (float)Math.Cos(theta * Math.PI / 180);
pt.X = r * cn;
pt.Y = y;
pt.Z = -r * sn;
pt.W = 1;
return pt;
}
public Point3[] BoxCoordinates()
{
Point3[] pts = new Point3[8];
// Create the Box:
pts[0] = new Point3(side, -side, -side, 1);
pts[1] = new Point3(side, side, -side, 1);
pts[2] = new Point3(-side, side, -side, 1);
pts[3] = new Point3(-side, -side, -side, 1);
pts[4] = new Point3(-side, -side, side, 1);
pts[5] = new Point3(side, -side, side, 1);
pts[6] = new Point3(side, side, side, 1);
pts[7] = new Point3(-side, side, side, 1);
return pts;
}