File size: 1,355 Bytes
b797337 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | /**
* 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 };
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