Computes a 20-bit lighting word, containing red, green, blue, and brightness settings. - Java 2D Graphics

Java examples for 2D Graphics:Color RGB

  1. HOME
  2. Java
  3. 2D Graphics
  4. Color RGB

Description

Computes a 20-bit lighting word, containing red, green, blue, and brightness settings.

Demo Code


//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        int r = 2;
        int g = 2;
        int b = 2;
        int brightness = 2;
        System.out.println(makeRGBLightValue(r, g, b, brightness));
    }//w ww.j a  va  2 s  . com

    /**
     * Computes a 20-bit lighting word, containing red, green, blue, and brightness settings.
     * Allows overriding of the Minecraft brightness value.
     * This value can be used directly for Block.lightValue 
     * 
     * Word format: 0RRRR 0GGGG 0BBBB 0LLLL
     * 
     * @param r Red intensity, 0 to 15. Resolution is 4 bits.
     * @param g Green intensity, 0 to 15. Resolution is 4 bits.
     * @param b Blue intensity, 0 to 15. Resolution is 4 bits.
     * @param brightness The existing lightValue of a block. Only the lower-most 4 bits of this parameter are used.
     * @return Integer describing RGBL color for a block
     * 
     * @author CptSpaceToaster
     */
    public static int makeRGBLightValue(int r, int g, int b, int brightness) {
        // Clamp color channels
        if (r < 0)
            r = 0;
        else if (r > 15)
            r = 15;

        if (g < 0)
            g = 0;
        else if (g > 15)
            g = 15;

        if (b < 0)
            b = 0;
        else if (b > 15)
            b = 15;

        brightness &= 0xf;

        return brightness | ((b << 15) + (g << 10) + (r << 5));
    }
}

Related Tutorials