three
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JavaScript 3D library
63 lines (36 loc) • 1.03 kB
JavaScript
/**
* Ref: https://en.wikipedia.org/wiki/Cylindrical_coordinate_system
*/
class Cylindrical {
constructor( radius, theta, y ) {
this.radius = ( radius !== undefined ) ? radius : 1.0; // distance from the origin to a point in the x-z plane
this.theta = ( theta !== undefined ) ? theta : 0; // counterclockwise angle in the x-z plane measured in radians from the positive z-axis
this.y = ( y !== undefined ) ? y : 0; // height above the x-z plane
return this;
}
set( radius, theta, y ) {
this.radius = radius;
this.theta = theta;
this.y = y;
return this;
}
clone() {
return new this.constructor().copy( 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;
}
}
export { Cylindrical };