CreateRotation() [2/2]

static Matrix3x2 System.Numerics.Matrix3x2.CreateRotation ( float radians, Vector2 centerPoint )

inlinestatic

Definition at line 168 of file Matrix3x2.cs.

    {
        radians = MathF.IEEERemainder(radians, (float)Math.PI * 2f);
        float num;
        float num2;
        if (radians > -1.7453294E-05f && radians < 1.7453294E-05f)
        {
            num = 1f;
            num2 = 0f;
        }
        else if (radians > 1.570779f && radians < 1.5708138f)
        {
            num = 0f;
            num2 = 1f;
        }
        else if (radians < -3.1415753f || radians > 3.1415753f)
        {
            num = -1f;
            num2 = 0f;
        }
        else if (radians > -1.5708138f && radians < -1.570779f)
        {
            num = 0f;
            num2 = -1f;
        }
        else
        {
            num = MathF.Cos(radians);
            num2 = MathF.Sin(radians);
        }
        float m = centerPoint.X * (1f - num) + centerPoint.Y * num2;
        float m2 = centerPoint.Y * (1f - num) - centerPoint.X * num2;
        System.Runtime.CompilerServices.Unsafe.SkipInit(out Matrix3x2 result);
        result.M11 = num;
        result.M12 = num2;
        result.M21 = 0f - num2;
        result.M22 = num;
        result.M31 = m;
        result.M32 = m2;
        return result;
    }

References System.MathF.Cos(), System.E, System.MathF.IEEERemainder(), System.Math.PI, System.MathF.Sin(), System.Numerics.Vector2.X, and System.Numerics.Vector2.Y.