87 lines
1.8 KiB
Java
87 lines
1.8 KiB
Java
package shootergame.util.math;
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import shootergame.util.math.vec.Vec2d;
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import shootergame.util.math.vec.Vec3d;
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public class MathHelpers
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{
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public static double squared(double x) {
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return x*x;
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}
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public static double pow(int c, double x)
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{
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double res = 1;
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for(int i=0;i<c;i++) {
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res *= x;
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}
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return res;
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}
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public static double distance3d(double x1, double y1, double z1, double x2, double y2, double z2) {
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return Math.sqrt( squared(x2 - x1) + squared(y2 - y1) + squared(z2 - z1) );
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}
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public static double distance2d(double x1, double y1, double x2, double y2) {
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return Math.sqrt( squared(x2 - x1) + squared(y2 - y1) );
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}
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public static double map(double x, double in_min, double in_max, double out_min, double out_max) {
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return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
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}
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public static Vec2d moveTowards2(double amount, double angle) {
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return new Vec2d(Math.sin(angle)*amount, Math.cos(angle)*amount);
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}
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public static Vec3d moveTowards3(double amount, Vec2d angles)
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{
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// Create some varibles
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Vec3d points = new Vec3d(0, 0, 0);
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double m;
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points.z = Math.sin(angles.y) * amount;
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m = Math.cos(angles.y);
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points.x = Math.sin(angles.x) * m * amount;
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m = Math.cos(angles.x) * m;
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points.y = m * amount;
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return points;
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}
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public static double mod(double a, double b) {
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return (((a % b) + b) % b);
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}
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public static int mod(int a, int b) {
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return (((a % b) + b) % b);
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}
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public static int floor(double a)
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{
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if((int)a == a) {
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return (int) a;
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}
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else if(a < 0) {
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return (int)(a - 1);
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}
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else {
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return (int)a;
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}
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}
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public static double positive(double a) {
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if(a < 0) return -a;
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else return a;
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}
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public static int positive(int a) {
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if(a < 0) return -a;
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else return a;
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}
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}
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