import { Light } from './Light.js';
import { SpotLightShadow } from './SpotLightShadow.js';
import { Object3D } from '../core/Object3D.js';
class SpotLight extends Light {
constructor( color, intensity, distance = 0, angle = Math.PI / 3, penumbra = 0, decay = 2 ) {
super( color, intensity );
this.isSpotLight = true;
this.type = 'SpotLight';
this.position.copy( Object3D.DEFAULT_UP );
this.updateMatrix();
this.target = new Object3D();
this.distance = distance;
this.angle = angle;
this.penumbra = penumbra;
this.decay = decay;
this.map = null;
this.shadow = new SpotLightShadow();
}
get power() {
// compute the light's luminous power (in lumens) from its intensity (in candela)
// by convention for a spotlight, luminous power (lm) = π * luminous intensity (cd)
return this.intensity * Math.PI;
}
set power( power ) {
// set the light's intensity (in candela) from the desired luminous power (in lumens)
this.intensity = power / Math.PI;
}
dispose() {
this.shadow.dispose();
}
copy( source, recursive ) {
super.copy( source, recursive );
this.distance = source.distance;
this.angle = source.angle;
this.penumbra = source.penumbra;
this.decay = source.decay;
this.target = source.target.clone();
this.shadow = source.shadow.clone();
return this;
}
}
export { SpotLight };