| 1 | package kaka.cakelight; |
| 2 | |
| 3 | public class Color { |
| 4 | private int r, g, b; |
| 5 | |
| 6 | public static Color rgb(double r, double g, double b) { |
| 7 | return rgb((int)(255 * r), (int)(255 * g), (int)(255 * b)); |
| 8 | } |
| 9 | |
| 10 | public static Color rgb(int r, int g, int b) { |
| 11 | Color c = new Color(); |
| 12 | c.r = r; |
| 13 | c.g = g; |
| 14 | c.b = b; |
| 15 | return c; |
| 16 | } |
| 17 | |
| 18 | public static Color hsv(double hue, double saturation, double value) { |
| 19 | double normalizedHue = hue - Math.floor(hue); |
| 20 | int h = (int)(normalizedHue * 6); |
| 21 | double f = normalizedHue * 6 - h; |
| 22 | double p = value * (1 - saturation); |
| 23 | double q = value * (1 - f * saturation); |
| 24 | double t = value * (1 - (1 - f) * saturation); |
| 25 | |
| 26 | switch (h) { |
| 27 | case 0: return rgb(value, t, p); |
| 28 | case 1: return rgb(q, value, p); |
| 29 | case 2: return rgb(p, value, t); |
| 30 | case 3: return rgb(p, q, value); |
| 31 | case 4: return rgb(t, p, value); |
| 32 | case 5: return rgb(value, p, q); |
| 33 | default: throw new RuntimeException("Something went wrong when converting from HSV to RGB. Input was " + hue + ", " + saturation + ", " + value); |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | public int r() { |
| 38 | return r; |
| 39 | } |
| 40 | |
| 41 | public int g() { |
| 42 | return g; |
| 43 | } |
| 44 | |
| 45 | public int b() { |
| 46 | return b; |
| 47 | } |
| 48 | |
| 49 | public Color interpolate(Color other, double value) { |
| 50 | double invertedValue = 1 - value; |
| 51 | return Color.rgb( |
| 52 | (int)(r * invertedValue + other.r * value), |
| 53 | (int)(g * invertedValue + other.g * value), |
| 54 | (int)(b * invertedValue + other.b * value) |
| 55 | ); |
| 56 | } |
| 57 | } |