File size: 1,026 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 | import { Light } from './Light.js';
import { PointLightShadow } from './PointLightShadow.js';
class PointLight extends Light {
constructor( color, intensity, distance = 0, decay = 2 ) {
super( color, intensity );
this.isPointLight = true;
this.type = 'PointLight';
this.distance = distance;
this.decay = decay;
this.shadow = new PointLightShadow();
}
get power() {
// compute the light's luminous power (in lumens) from its intensity (in candela)
// for an isotropic light source, luminous power (lm) = 4 π luminous intensity (cd)
return this.intensity * 4 * Math.PI;
}
set power( power ) {
// set the light's intensity (in candela) from the desired luminous power (in lumens)
this.intensity = power / ( 4 * Math.PI );
}
dispose() {
this.shadow.dispose();
}
copy( source, recursive ) {
super.copy( source, recursive );
this.distance = source.distance;
this.decay = source.decay;
this.shadow = source.shadow.clone();
return this;
}
}
export { PointLight };
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