UnityEditor.ColorPicker.Update1DSlider C# (CSharp) Method

        private static Texture2D Update1DSlider(Texture2D tex, int xSize, float const1, float const2, ref float oldConst1, ref float oldConst2, int idx, bool hsvSpace, float scale, float exposureValue, bool forceUpdate, TonemappingType tonemappingType)
        {
            if (((tex == null) || (const1 != oldConst1)) || ((const2 != oldConst2) || forceUpdate))
            {
                if (tex == null)
                {
                    tex = MakeTexture(xSize, 2);
                }
                Color[] retval = new Color[xSize * 2];
                Color black = Color.black;
                Color rightGradient = Color.black;
                switch (idx)
                {
                    case 0:
                        black = new Color(0f, const1, const2, 1f);
                        rightGradient = new Color(1f, 0f, 0f, 0f);
                        break;

                    case 1:
                        black = new Color(const1, 0f, const2, 1f);
                        rightGradient = new Color(0f, 1f, 0f, 0f);
                        break;

                    case 2:
                        black = new Color(const1, const2, 0f, 1f);
                        rightGradient = new Color(0f, 0f, 1f, 0f);
                        break;

                    case 3:
                        black = new Color(0f, 0f, 0f, 1f);
                        rightGradient = new Color(1f, 1f, 1f, 0f);
                        break;
                }
                FillArea(xSize, 2, retval, black, rightGradient, new Color(0f, 0f, 0f, 0f));
                if (hsvSpace)
                {
                    HSVToRGBArray(retval, scale);
                }
                else
                {
                    ScaleColors(retval, scale);
                }
                DoTonemapping(retval, exposureValue, tonemappingType);
                oldConst1 = const1;
                oldConst2 = const2;
                tex.SetPixels(retval);
                tex.Apply();
            }
            return tex;
        }

        private void HSVSliders()
        {
            bool changed = GUI.changed;

            GUI.changed       = false;
            this.m_HueTexture = ColorPicker.Update1DSlider(this.m_HueTexture, 64, 1f, 1f, ref this.m_HueTextureS, ref this.m_HueTextureV, 0, true);
            this.m_SatTexture = ColorPicker.Update1DSlider(this.m_SatTexture, 8, this.m_H, Mathf.Max(this.m_V, 0.2f), ref this.m_SatTextureH, ref this.m_SatTextureV, 1, true);
            this.m_ValTexture = ColorPicker.Update1DSlider(this.m_ValTexture, 8, this.m_H, this.m_S, ref this.m_ValTextureH, ref this.m_ValTextureS, 2, true);
            float num  = (float)((int)Mathf.Round(this.m_H * 359f));
            float num2 = (float)((int)Mathf.Round(this.m_S * 255f));
            float num3 = (float)((int)Mathf.Round(this.m_V * 255f));

            num  = this.TexturedSlider(this.m_HueTexture, "H", num, 0f, 359f);
            num2 = this.TexturedSlider(this.m_SatTexture, "S", num2, 0f, 255f);
            num3 = this.TexturedSlider(this.m_ValTexture, "V", num3, 0f, 255f);
            if (GUI.changed)
            {
                this.m_H = num / 359f;
                this.m_S = num2 / 255f;
                this.m_V = num3 / 255f;
                this.HSVToRGB();
            }
            GUI.changed |= changed;
        }