Accueil / npm / three@0.171.0 / examples / jsm / tsl / display / DotScreenNode.js
DotScreenNode.js
import { Vector2, TempNode } from 'three/webgpu';
import { nodeObject, Fn, uv, uniform, vec2, vec3, sin, cos, add, vec4, screenSize } from 'three/tsl';
class DotScreenNode extends TempNode {
static get type() {
return 'DotScreenNode';
}
constructor( inputNode, center = new Vector2( 0.5, 0.5 ), angle = 1.57, scale = 1 ) {
super( 'vec4' );
this.inputNode = inputNode;
this.center = uniform( center );
this.angle = uniform( angle );
this.scale = uniform( scale );
}
setup() {
const inputNode = this.inputNode;
const pattern = Fn( () => {
const s = sin( this.angle );
const c = cos( this.angle );
const tex = uv().mul( screenSize ).sub( this.center );
const point = vec2( c.mul( tex.x ).sub( s.mul( tex.y ) ), s.mul( tex.x ).add( c.mul( tex.y ) ) ).mul( this.scale );
return sin( point.x ).mul( sin( point.y ) ).mul( 4 );
} );
const dotScreen = Fn( () => {
const color = inputNode;
const average = add( color.r, color.g, color.b ).div( 3 );
return vec4( vec3( average.mul( 10 ).sub( 5 ).add( pattern() ) ), color.a );
} );
const outputNode = dotScreen();
return outputNode;
}
}
export default DotScreenNode;
export const dotScreen = ( node, center, angle, scale ) => nodeObject( new DotScreenNode( nodeObject( node ), center, angle, scale ) );