ComputeTangent() [1/2]

void Microsoft.Xna.Framework.Curve.ComputeTangent ( int keyIndex, CurveTangent tangentInType, CurveTangent tangentOutType )

inline

Definition at line 58 of file Curve.cs.

    {
        if (keys.Count <= keyIndex || keyIndex < 0)
        {
            throw new ArgumentOutOfRangeException("keyIndex");
        }
        CurveKey curveKey = Keys[keyIndex];
        float num;
        float position;
        float num2 = (num = (position = curveKey.Position));
        float num3;
        float value;
        float num4 = (num3 = (value = curveKey.Value));
        if (keyIndex > 0)
        {
            num2 = Keys[keyIndex - 1].Position;
            num4 = Keys[keyIndex - 1].Value;
        }
        if (keyIndex + 1 < keys.Count)
        {
            position = Keys[keyIndex + 1].Position;
            value = Keys[keyIndex + 1].Value;
        }
        switch (tangentInType)
        {
        case CurveTangent.Smooth:
        {
            float num5 = position - num2;
            float num6 = value - num4;
            if (Math.Abs(num6) < 1.1920929E-07f)
            {
                curveKey.TangentIn = 0f;
            }
            else
            {
                curveKey.TangentIn = num6 * Math.Abs(num2 - num) / num5;
            }
            break;
        }
        case CurveTangent.Linear:
            curveKey.TangentIn = num3 - num4;
            break;
        default:
            curveKey.TangentIn = 0f;
            break;
        }
        switch (tangentOutType)
        {
        case CurveTangent.Smooth:
        {
            float num7 = position - num2;
            float num8 = value - num4;
            if (Math.Abs(num8) < 1.1920929E-07f)
            {
                curveKey.TangentOut = 0f;
            }
            else
            {
                curveKey.TangentOut = num8 * Math.Abs(position - num) / num7;
            }
            break;
        }
        case CurveTangent.Linear:
            curveKey.TangentOut = value - num3;
            break;
        default:
            curveKey.TangentOut = 0f;
            break;
        }
    }

References System.Math.Abs(), Microsoft.Xna.Framework.CurveKeyCollection.Count, Microsoft.Xna.Framework.Curve.keys, Microsoft.Xna.Framework.Curve.Keys, Microsoft.Xna.Framework.CurveKey.Position, Microsoft.Xna.Framework.CurveKey.Value, and System.value.