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Im Hintergrund läuft eine Planetensimulation, geschrieben in JavaScript und Three.js.
Die zu sehenden Texturen stammen von:
https://www.solarsystemscope.com/textures/
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75 lines
1.2 KiB
75 lines
1.2 KiB
import { TempNode } from '../core/TempNode.js'; |
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import { ConstNode } from '../core/ConstNode.js'; |
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import { FunctionNode } from '../core/FunctionNode.js'; |
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class LuminanceNode extends TempNode { |
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constructor( rgb ) { |
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super( 'f' ); |
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this.rgb = rgb; |
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} |
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generate( builder, output ) { |
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const luminance = builder.include( LuminanceNode.Nodes.luminance ); |
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return builder.format( luminance + '( ' + this.rgb.build( builder, 'v3' ) + ' )', this.getType( builder ), output ); |
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} |
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copy( source ) { |
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super.copy( source ); |
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this.rgb = source.rgb; |
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return this; |
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} |
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toJSON( meta ) { |
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let data = this.getJSONNode( meta ); |
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if ( ! data ) { |
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data = this.createJSONNode( meta ); |
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data.rgb = this.rgb.toJSON( meta ).uuid; |
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} |
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return data; |
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} |
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} |
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LuminanceNode.Nodes = ( function () { |
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const LUMA = new ConstNode( 'vec3 LUMA vec3( 0.2125, 0.7154, 0.0721 )' ); |
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// Algorithm from Chapter 10 of Graphics Shaders |
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const luminance = new FunctionNode( /* glsl */` |
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float luminance( vec3 rgb ) { |
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return dot( rgb, LUMA ); |
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}` |
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, [ LUMA ] ); |
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return { |
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LUMA: LUMA, |
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luminance: luminance |
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}; |
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} )(); |
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LuminanceNode.prototype.nodeType = 'Luminance'; |
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export { LuminanceNode };
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