Ejemplo n.º 1
0
        private static Color ToColor(ColorHsv hsv)
        {
            // HSV contains values scaled as in the color wheel:
            // that is, all from 0 to 255.

            // For this code to work, HSV.Hue needs
            // to be scaled from 0 to 360 (it's the angle of the selected
            // point within the circle). HSV.Saturation and HSV.Value must be
            // scaled to be between 0 and 1.

            float r = 0, g = 0, b = 0;

            // Scale Hue to be between 0 and 360. Saturation
            // and Value scale to be between 0 and 1.
            float h = (hsv.H / 255.0f * 360.0f) % 360;
            float s = hsv.S / 255.0f;
            float v = hsv.V / 255.0f;

            if (s == 0)
            {
                // If s is 0, all colors are the same.
                // This is some flavor of gray.
                r = v;
                g = v;
                b = v;
            }
            else
            {
                // The color wheel consists of 6 sectors.
                // Figure out which sector you're in.
                float sectorPos = h / 60.0f;
                int sectorNumber = (int) Math.Floor(sectorPos);

                // Get the fractional part of the sector.
                // That is, how many degrees into the sector
                // are you?
                float fractionalSector = sectorPos - sectorNumber;

                // Calculate values for the three axes
                // of the color.
                float p = v * (1 - s);
                float q = v * (1 - (s * fractionalSector));
                float t = v * (1 - (s * (1 - fractionalSector)));

                // Assign the fractional colors to r, g, and b
                // based on the sector the angle is in.
                switch (sectorNumber)
                {
                    case 0:
                        r = v;
                        g = t;
                        b = p;
                        break;
                    case 1:
                        r = q;
                        g = v;
                        b = p;
                        break;
                    case 2:
                        r = p;
                        g = v;
                        b = t;
                        break;
                    case 3:
                        r = p;
                        g = q;
                        b = v;
                        break;
                    case 4:
                        r = t;
                        g = p;
                        b = v;
                        break;
                    case 5:
                        r = v;
                        g = p;
                        b = q;
                        break;
                }
            }

            return Color.FromRgb((byte)(r * 255), (byte)(g * 255), (byte)(b * 255));
        }
Ejemplo n.º 2
0
        private static Color ToColor(ColorHsv hsv)
        {
            // HSV contains values scaled as in the color wheel:
            // that is, all from 0 to 255.

            // For this code to work, HSV.Hue needs
            // to be scaled from 0 to 360 (it's the angle of the selected
            // point within the circle). HSV.Saturation and HSV.Value must be
            // scaled to be between 0 and 1.

            float r = 0, g = 0, b = 0;

            // Scale Hue to be between 0 and 360. Saturation
            // and Value scale to be between 0 and 1.
            float h = (hsv.H / 255.0f * 360.0f) % 360;
            float s = hsv.S / 255.0f;
            float v = hsv.V / 255.0f;

            if (s == 0)
            {
                // If s is 0, all colors are the same.
                // This is some flavor of gray.
                r = v;
                g = v;
                b = v;
            }
            else
            {
                // The color wheel consists of 6 sectors.
                // Figure out which sector you're in.
                float sectorPos    = h / 60.0f;
                int   sectorNumber = (int)Math.Floor(sectorPos);

                // Get the fractional part of the sector.
                // That is, how many degrees into the sector
                // are you?
                float fractionalSector = sectorPos - sectorNumber;

                // Calculate values for the three axes
                // of the color.
                float p = v * (1 - s);
                float q = v * (1 - (s * fractionalSector));
                float t = v * (1 - (s * (1 - fractionalSector)));

                // Assign the fractional colors to r, g, and b
                // based on the sector the angle is in.
                switch (sectorNumber)
                {
                case 0:
                    r = v;
                    g = t;
                    b = p;
                    break;

                case 1:
                    r = q;
                    g = v;
                    b = p;
                    break;

                case 2:
                    r = p;
                    g = v;
                    b = t;
                    break;

                case 3:
                    r = p;
                    g = q;
                    b = v;
                    break;

                case 4:
                    r = t;
                    g = p;
                    b = v;
                    break;

                case 5:
                    r = v;
                    g = p;
                    b = q;
                    break;
                }
            }

            return(Color.FromRgb((byte)(r * 255), (byte)(g * 255), (byte)(b * 255)));
        }