void EditMoveTangent()

in unity/Assets/PostProcessingV2/Editor/Utils/CurveEditor.cs [719:750]

• 23 lines of code
• 11 McCabe index (conditional complexity)

        void EditMoveTangent(AnimationCurve curve, Keyframe[] keys, int keyframeIndex, Tangent targetTangent, bool linkTangents)
        {
            var pos = CanvasToCurve(Event.current.mousePosition);

            float time = keys[keyframeIndex].time;
            float value = keys[keyframeIndex].value;

            pos -= new Vector3(time, value);

            if (targetTangent == Tangent.In && pos.x > 0f)
                pos.x = 0f;

            if (targetTangent == Tangent.Out && pos.x < 0f)
                pos.x = 0f;

            float tangent;

            if (Mathf.Approximately(pos.x, 0f))
                tangent = pos.y < 0f ? float.PositiveInfinity : float.NegativeInfinity;
            else
                tangent = pos.y / pos.x;

            float inTangent = keys[keyframeIndex].inTangent;
            float outTangent = keys[keyframeIndex].outTangent;

            if (targetTangent == Tangent.In || linkTangents)
                inTangent = tangent;
            if (targetTangent == Tangent.Out || linkTangents)
                outTangent = tangent;

            SetKeyframe(curve, keyframeIndex, new Keyframe(time, value, inTangent, outTangent));
        }