three 基础库
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import { TempNode } from '../core/TempNode.js';
import { FunctionNode } from '../core/FunctionNode.js';
import { UVNode } from '../accessors/UVNode.js';
class CheckerNode extends TempNode {
constructor( uv ) {
super( 'f' );
this.uv = uv || new UVNode();
}
generate( builder, output ) {
const snoise = builder.include( CheckerNode.Nodes.checker );
return builder.format( snoise + '( ' + this.uv.build( builder, 'v2' ) + ' )', this.getType( builder ), output );
}
copy( source ) {
super.copy( source );
this.uv = source.uv;
return this;
}
toJSON( meta ) {
let data = this.getJSONNode( meta );
if ( ! data ) {
data = this.createJSONNode( meta );
data.uv = this.uv.toJSON( meta ).uuid;
}
return data;
}
}
CheckerNode.Nodes = ( function () {
// https://github.com/mattdesl/glsl-checker/blob/master/index.glsl
const checker = new FunctionNode( /* glsl */`
float checker( vec2 uv ) {
float cx = floor( uv.x );
float cy = floor( uv.y );
float result = mod( cx + cy, 2.0 );
return sign( result );
}`
);
return {
checker: checker
};
} )();
CheckerNode.prototype.nodeType = 'Noise';
export { CheckerNode };