three 基础库
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import { TempNode } from '../core/TempNode.js';
import { ResolutionNode } from './ResolutionNode.js';
class ScreenUVNode extends TempNode {
constructor( resolution ) {
super( 'v2' );
this.resolution = resolution || new ResolutionNode();
}
generate( builder, output ) {
let result;
if ( builder.isShader( 'fragment' ) ) {
result = '( gl_FragCoord.xy / ' + this.resolution.build( builder, 'v2' ) + ')';
} else {
console.warn( 'THREE.ScreenUVNode is not compatible with ' + builder.shader + ' shader.' );
result = 'vec2( 0.0 )';
}
return builder.format( result, this.getType( builder ), output );
}
copy( source ) {
super.copy( source );
this.resolution = source.resolution;
return this;
}
toJSON( meta ) {
let data = this.getJSONNode( meta );
if ( ! data ) {
data = this.createJSONNode( meta );
data.resolution = this.resolution.toJSON( meta ).uuid;
}
return data;
}
}
ScreenUVNode.prototype.nodeType = 'ScreenUV';
export { ScreenUVNode };