/*
* Returns a 3D matrix based on the Z axis
*/
public static Matrix Rotate3DZAxis(float alpha, bool reverse)
{
Matrix rotationMatrix = new Matrix(4, 4);
float cos = GonioFactory.GetTrigonometricByRadians(alpha, Trigonometric.Cosine);
float sin = GonioFactory.GetTrigonometricByRadians(alpha, Trigonometric.Sine);
if (reverse)
{
sin = -sin;
}
float[,] data =
{
{ cos, -sin, 0, 0 },
{ sin, cos, 0, 0 },
{ 0, 0, 1, 0 },
{ 0, 0, 0, 1 }
};
rotationMatrix.SetData(data);
return(rotationMatrix);
}
/*
* Calculates the scale based on the fieldofview and the near variable
*/
public float GetScale()
{
var rad = GonioFactory.DegreesToRadians(_fieldOfView);
return(_near * GonioFactory.GetTrigonometricByRadians(rad * 0.5f, Trigonometric.Tangent));
}