| /** | |
| * Ref: https://en.wikipedia.org/wiki/Spherical_coordinate_system | |
| * | |
| * The polar angle (phi) is measured from the positive y-axis. The positive y-axis is up. | |
| * The azimuthal angle (theta) is measured from the positive z-axis. | |
| */ | |
| import * as MathUtils from './MathUtils.js'; | |
| class Spherical { | |
| constructor( radius = 1, phi = 0, theta = 0 ) { | |
| this.radius = radius; | |
| this.phi = phi; // polar angle | |
| this.theta = theta; // azimuthal angle | |
| return this; | |
| } | |
| set( radius, phi, theta ) { | |
| this.radius = radius; | |
| this.phi = phi; | |
| this.theta = theta; | |
| return this; | |
| } | |
| copy( other ) { | |
| this.radius = other.radius; | |
| this.phi = other.phi; | |
| this.theta = other.theta; | |
| return this; | |
| } | |
| // restrict phi to be between EPS and PI-EPS | |
| makeSafe() { | |
| const EPS = 0.000001; | |
| this.phi = Math.max( EPS, Math.min( Math.PI - EPS, this.phi ) ); | |
| return this; | |
| } | |
| setFromVector3( v ) { | |
| return this.setFromCartesianCoords( v.x, v.y, v.z ); | |
| } | |
| setFromCartesianCoords( x, y, z ) { | |
| this.radius = Math.sqrt( x * x + y * y + z * z ); | |
| if ( this.radius === 0 ) { | |
| this.theta = 0; | |
| this.phi = 0; | |
| } else { | |
| this.theta = Math.atan2( x, z ); | |
| this.phi = Math.acos( MathUtils.clamp( y / this.radius, - 1, 1 ) ); | |
| } | |
| return this; | |
| } | |
| clone() { | |
| return new this.constructor().copy( this ); | |
| } | |
| } | |
| export { Spherical }; | |