87 lines
2.1 KiB
Java
87 lines
2.1 KiB
Java
package ru.betterend.util;
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import java.util.Random;
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public class MHelper {
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public static final float PI2 = (float) (Math.PI * 2);
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private static final int ALPHA = 255 << 24;
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public static final Random RANDOM = new Random();
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public static int color(int r, int g, int b) {
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return ALPHA | (r << 16) | (g << 8) | b;
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}
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public static int randRange(int min, int max, Random random) {
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return min + random.nextInt(max - min + 1);
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}
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public static double randRange(double min, double max, Random random) {
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return min + random.nextDouble() * (max - min);
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}
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public static float randRange(float min, float max, Random random) {
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return min + random.nextFloat() * (max - min);
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}
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public static byte setBit(byte source, int pos, boolean value) {
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return value ? setBitTrue(source, pos) : setBitFalse(source, pos);
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}
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public static byte setBitTrue(byte source, int pos) {
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source |= 1 << pos;
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return source;
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}
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public static byte setBitFalse(byte source, int pos) {
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source &= ~(1 << pos);
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return source;
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}
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public static boolean getBit(byte source, int pos) {
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return ((source >> pos) & 1) == 1;
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}
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public static int floor(float x) {
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return x < 0 ? (int) (x - 1) : (int) x;
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}
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public static float wrap(float x, float side) {
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return x - floor(x / side) * side;
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}
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public static int floor(double x) {
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return x < 0 ? (int) (x - 1) : (int) x;
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}
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public static int min(int a, int b) {
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return a < b ? a : b;
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}
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public static int max(int a, int b) {
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return a > b ? a : b;
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}
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public static float min(float a, float b) {
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return a < b ? a : b;
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}
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public static float max(float a, float b) {
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return a > b ? a : b;
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}
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public static float length(float x, float y, float z) {
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return (float) Math.sqrt(x * x + y * y + z * z);
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}
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public static float length(float x, float y) {
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return (float) Math.sqrt(x * x + y * y);
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}
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public static float dot(float x1, float y1, float z1, float x2, float y2, float z2) {
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return x1 * x2 + y1 * y2 + z1 * z2;
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}
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public static float dot(float x1, float y1, float x2, float y2) {
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return x1 * x2 + y1 * y2;
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}
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}
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