Bezier.Bezier.map C# (CSharp) Метод

        private float map(float u)
        {
            float targetLength = u * this.arcLengths[(int)this.len];
            int low = 0;
            int high = (int)this.len;
            int index = 0;
            while (low < high) {
                index = low + ((int)((high - low) / 2.0f) | 0);
                if (this.arcLengths[index] < targetLength) {
                    low = index + 1;
                } else {
                    high = index;
                }
            }
            if(this.arcLengths[index] > targetLength)
                index--;
            if(index<0)
                index = 0;

            return (index + (targetLength - arcLengths[index]) / (arcLengths[index + 1] - arcLengths[index])) / this.len;
        }