/// <summary>
/// Left multiply a point by this matrix and return a new point as the result
/// </summary>
/// <param name="point4d"></param>
/// <returns></returns>
public Point4d LeftMultiply(Point4d point4d)
{
Point4d result = new Point4d();
LeftMultiply(point4d, result);
return(result);
}
/// <summary>
/// Left multiply a point by this matrix and store the result into result
/// </summary>
/// <param name="point4d"></param>
/// <param name="result"></param>
public void LeftMultiply(Point4d point4d, Point4d result)
{
result.X = data[0] * point4d.X + data[4] * point4d.Y + data[8] * point4d.Z + data[12] * point4d.T;
result.Y = data[1] * point4d.X + data[5] * point4d.Y + data[9] * point4d.Z + data[13] * point4d.T;
result.Z = data[2] * point4d.X + data[6] * point4d.Y + data[10] * point4d.Z + data[14] * point4d.T;
result.T = data[3] * point4d.X + data[7] * point4d.Y + data[11] * point4d.Z + data[15] * point4d.T;
}
/// <summary>
/// Subtracts a point from this point
/// </summary>
/// <param name="point3d"></param>
public void Subtract(Point4d point4d)
{
X -= point4d.X;
Y -= point4d.Y;
Z -= point4d.Z;
T -= point4d.T;
}
/// <summary>
/// Adds a point to this point
/// </summary>
/// <param name="point3d"></param>
public void Add(Point4d point4d)
{
X += point4d.X;
Y += point4d.Y;
Z += point4d.Z;
T += point4d.T;
}
/// <summary>
/// Copies this vector into another vector
/// </summary>
/// <param name="point3f"></param>
public void CopyTo(Point4d point4d)
{
point4d.X = X;
point4d.Y = Y;
point4d.Z = Z;
point4d.T = T;
}
public static Point4d operator -(Point4d p1, Point4d p2)
{
Point4d result = new Point4d();
p1.CopyTo(result);
result.Add(p2);
return(result);
}
/// <summary>
/// Returns the dot product of this point with another point
/// </summary>
/// <param name="point3d"></param>
/// <returns></returns>
public double Dot(Point4d point4d)
{
return(X * point4d.X + Y * point4d.Y + Z * point4d.Z + T * point4d.T);
}
/// <summary>
/// Subtracts a point from this point and stores in result
/// </summary>
/// <param name="point3d"></param>
/// <param name="result"></param>
public void Subtract(Point4d point4d, Point4d result)
{
this.CopyTo(result);
result.Subtract(point4d);
}
/// <summary>
/// Adds a point to this point and stores in result
/// </summary>
/// <param name="point3d"></param>
/// <param name="result"></param>
public void Add(Point4d point4d, Point4d result)
{
this.CopyTo(result);
result.Add(point4d);
}