57 lines
926 B
JavaScript
57 lines
926 B
JavaScript
import { Light } from './Light.js';
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class RectAreaLight extends Light {
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constructor( color, intensity, width = 10, height = 10 ) {
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super( color, intensity );
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this.isRectAreaLight = true;
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this.type = 'RectAreaLight';
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this.width = width;
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this.height = height;
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}
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get power() {
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// compute the light's luminous power (in lumens) from its intensity (in nits)
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return this.intensity * this.width * this.height * Math.PI;
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}
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set power( power ) {
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// set the light's intensity (in nits) from the desired luminous power (in lumens)
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this.intensity = power / ( this.width * this.height * Math.PI );
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}
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copy( source ) {
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super.copy( source );
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this.width = source.width;
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this.height = source.height;
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return this;
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}
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toJSON( meta ) {
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const data = super.toJSON( meta );
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data.object.width = this.width;
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data.object.height = this.height;
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return data;
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}
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}
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export { RectAreaLight };
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