StretchyTanks.BezierSlope.interp C# (CSharp) Method

        public Vector2 interp(float t)
        {
            Vector2 a = Vector2.Lerp(Vector2.zero, p1, t);
            Vector2 b = Vector2.Lerp(p1, p2, t);
            Vector2 c = Vector2.Lerp(p2, Vector2.one, t);

            Vector2 d = Vector2.Lerp(a, b, t);
            Vector2 e = Vector2.Lerp(b, c, t);

            return Vector2.Lerp(d, e, t);
        }

        public override double calcVolumeFactor()
        {
            double volume = 0;
            var pp = new Vector2(radialFactor, 0);
            var slope = new BezierSlope(coneShape);

            for (int i = 1; i <= heightSegments; ++i)
            {
                float v = (float)i / heightSegments;

                Vector2 p;
                if (radialFactor <= topFactor)
                {
                    p = slope.interp(v);
                    p.x = Mathf.Lerp(radialFactor, topFactor, p.x);
                }
                else
                {
                    p = slope.interp(1 - v);
                    p.y = 1 - p.y;
                    p.x = Mathf.Lerp(topFactor, radialFactor, p.x);
                }

                double r = (p.x + pp.x) * 0.5;
                volume += r * r * (p.y - pp.y);

                pp = p;
            }

            return volume * stretchFactor * volMultiplier * utilization / 0.8692f;
        }