backend/libs/three/math/Cylindrical.js

/**
 * Ref: https://en.wikipedia.org/wiki/Cylindrical_coordinate_system
 */

class Cylindrical {
	constructor(radius = 1, theta = 0, y = 0) {
		this.radius = radius; // distance from the origin to a point in the x-z plane
		this.theta = theta; // counterclockwise angle in the x-z plane measured in radians from the positive z-axis
		this.y = y; // height above the x-z plane

		return this;
	}

	set(radius, theta, y) {
		this.radius = radius;
		this.theta = theta;
		this.y = y;

		return this;
	}

	copy(other) {
		this.radius = other.radius;
		this.theta = other.theta;
		this.y = other.y;

		return this;
	}

	setFromVector3(v) {
		return this.setFromCartesianCoords(v.x, v.y, v.z);
	}

	setFromCartesianCoords(x, y, z) {
		this.radius = Math.sqrt(x * x + z * z);
		this.theta = Math.atan2(x, z);
		this.y = y;

		return this;
	}

	clone() {
		return new this.constructor().copy(this);
	}
}

export { Cylindrical };