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91 lines
1.7 KiB
91 lines
1.7 KiB
package com.porcupine.math;
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import com.porcupine.coord.Coord;
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/**
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* Polar coordinate
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*
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* @author Ondřej Hruška (MightyPork)
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*/
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public class Polar {
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/** angle in radians */
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public double angle = 0;
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/** distance in units */
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public double distance = 0;
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/**
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* @param angle angle in radians
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* @param distance distance from origin
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*/
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public Polar(double angle, double distance) {
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this.angle = angle;
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this.distance = distance;
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}
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/**
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* Make polar from coord
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*
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* @param coord coord
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* @return polar
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*/
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public static Polar fromCoord(Coord coord) {
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return new Polar(Math.atan2(coord.y, coord.x), Math.sqrt(Calc.square(coord.x) + Calc.square(coord.y)));
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}
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/**
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* Make polar from coords
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*
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* @param x x coord
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* @param y y coord
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* @return polar
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*/
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public static Polar fromCoord(double x, double y) {
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return Polar.fromCoord(new Coord(x, y));
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}
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/**
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* Make polar from coords
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*
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* @param x x coord
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* @param z z coord
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* @return polar
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*/
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public static Polar fromCoordXZ(double x, double z) {
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return Polar.fromCoordXZ(new Coord(x, 0, z));
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}
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/**
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* Get coord from polar
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*
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* @return coord
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*/
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public Coord toCoord() {
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return new Coord(distance * Math.cos(angle), distance * Math.sin(angle));
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}
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/**
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* Get X,0,Y coord from polar
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*
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* @return coord
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*/
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public Coord toCoordXZ() {
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return new Coord(distance * Math.cos(angle), 0, distance * Math.sin(angle));
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}
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@Override
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public String toString() {
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return "Polar(theta=" + angle + ", r=" + distance + ")";
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}
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/**
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* Build polar from X,Z instead of X,Y
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*
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* @param coord cpprd with X,Z
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* @return polar
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*/
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public static Polar fromCoordXZ(Coord coord) {
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return fromCoord(coord.x, coord.z);
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}
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}
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