public static Matrix <double> GetProjectionMatrix(double angle, double screenWidth, double screenHeight)
{
return(DenseMatrix.OfArray(new double[, ]
{
{ -(screenWidth / 2) * Trig.Cot(angle / 2), 0, screenWidth / 2, 0 },
{ 0, screenWidth / 2 * Trig.Cot(angle / 2), screenHeight / 2, 0 },
{ 0, 0, 0, 1 },
{ 0, 0, 1, 0 }
}));
}
public void CanComputeCotangent(double value, double expected)
{
var actual = Trig.Cot(value);
AssertHelpers.AlmostEqual(expected, actual, 13);
}
// Calculate function
public override double Calc(double val)
{
return(Trig.Cot(val));
}