Accueil / npm / three@0.172.0 / examples / jsm / tsl / display / AnamorphicNode.js
AnamorphicNode.js
import { RenderTarget, Vector2, TempNode, QuadMesh, NodeMaterial, RendererUtils } from 'three/webgpu';
import { nodeObject, Fn, float, NodeUpdateType, uv, passTexture, uniform, convertToTexture, vec2, vec3, Loop, mix, luminance } from 'three/tsl';
/** @module AnamorphicNode **/
const _quadMesh = /*@__PURE__*/ new QuadMesh();
let _rendererState;
/**
* Post processing node for adding an anamorphic flare effect.
*
* @augments TempNode
*/
class AnamorphicNode extends TempNode {
static get type() {
return 'AnamorphicNode';
}
/**
* Constructs a new anamorphic node.
*
* @param {TextureNode} textureNode - The texture node that represents the input of the effect.
* @param {Node<float>} tresholdNode - The threshold is one option to control the intensity and size of the effect.
* @param {Node<float>} scaleNode - Defines the vertical scale of the flares.
* @param {Number} samples - More samples result in larger flares and a more expensive runtime behavior.
*/
constructor( textureNode, tresholdNode, scaleNode, samples ) {
super( 'vec4' );
/**
* The texture node that represents the input of the effect.
*
* @type {TextureNode}
*/
this.textureNode = textureNode;
/**
* The threshold is one option to control the intensity and size of the effect.
*
* @type {Node<float>}
*/
this.tresholdNode = tresholdNode;
/**
* Defines the vertical scale of the flares.
*
* @type {Node<float>}
*/
this.scaleNode = scaleNode;
/**
* The color of the flares.
*
* @type {Node<vec3>}
*/
this.colorNode = vec3( 0.1, 0.0, 1.0 );
/**
* More samples result in larger flares and a more expensive runtime behavior.
*
* @type {Node<float>}
*/
this.samples = samples;
/**
* The resolution scale.
*
* @type {Vector2}
*/
this.resolution = new Vector2( 1, 1 );
/**
* The internal render target of the effect.
*
* @private
* @type {RenderTarget}
*/
this._renderTarget = new RenderTarget( 1, 1, { depthBuffer: false } );
this._renderTarget.texture.name = 'anamorphic';
/**
* A uniform node holding the inverse resolution value.
*
* @private
* @type {UniformNode<vec2>}
*/
this._invSize = uniform( new Vector2() );
/**
* The result of the effect is represented as a separate texture node.
*
* @private
* @type {PassTextureNode}
*/
this._textureNode = passTexture( this, this._renderTarget.texture );
/**
* The `updateBeforeType` is set to `NodeUpdateType.FRAME` since the node renders
* its effect once per frame in `updateBefore()`.
*
* @type {String}
* @default 'frame'
*/
this.updateBeforeType = NodeUpdateType.FRAME;
}
/**
* Returns the result of the effect as a texture node.
*
* @return {PassTextureNode} A texture node that represents the result of the effect.
*/
getTextureNode() {
return this._textureNode;
}
/**
* Sets the size of the effect.
*
* @param {Number} width - The width of the effect.
* @param {Number} height - The height of the effect.
*/
setSize( width, height ) {
this._invSize.value.set( 1 / width, 1 / height );
width = Math.max( Math.round( width * this.resolution.x ), 1 );
height = Math.max( Math.round( height * this.resolution.y ), 1 );
this._renderTarget.setSize( width, height );
}
/**
* This method is used to render the effect once per frame.
*
* @param {NodeFrame} frame - The current node frame.
*/
updateBefore( frame ) {
const { renderer } = frame;
_rendererState = RendererUtils.resetRendererState( renderer, _rendererState );
//
const textureNode = this.textureNode;
const map = textureNode.value;
this._renderTarget.texture.type = map.type;
const currentTexture = textureNode.value;
_quadMesh.material = this._material;
this.setSize( map.image.width, map.image.height );
// render
renderer.setRenderTarget( this._renderTarget );
_quadMesh.render( renderer );
// restore
textureNode.value = currentTexture;
RendererUtils.restoreRendererState( renderer, _rendererState );
}
/**
* This method is used to setup the effect's TSL code.
*
* @param {NodeBuilder} builder - The current node builder.
* @return {PassTextureNode}
*/
setup( builder ) {
const textureNode = this.textureNode;
const uvNode = textureNode.uvNode || uv();
const sampleTexture = ( uv ) => textureNode.sample( uv );
const threshold = ( color, threshold ) => mix( vec3( 0.0 ), color, luminance( color ).sub( threshold ).max( 0 ) );
const anamorph = Fn( () => {
const samples = this.samples;
const halfSamples = Math.floor( samples / 2 );
const total = vec3( 0 ).toVar();
Loop( { start: - halfSamples, end: halfSamples }, ( { i } ) => {
const softness = float( i ).abs().div( halfSamples ).oneMinus();
const uv = vec2( uvNode.x.add( this._invSize.x.mul( i ).mul( this.scaleNode ) ), uvNode.y );
const color = sampleTexture( uv );
const pass = threshold( color, this.tresholdNode ).mul( softness );
total.addAssign( pass );
} );
return total.mul( this.colorNode );
} );
//
const material = this._material || ( this._material = new NodeMaterial() );
material.name = 'Anamorphic';
material.fragmentNode = anamorph();
//
const properties = builder.getNodeProperties( this );
properties.textureNode = textureNode;
//
return this._textureNode;
}
/**
* Frees internal resources. This method should be called
* when the effect is no longer required.
*/
dispose() {
this._renderTarget.dispose();
}
}
/**
* TSL function for creating an anamorphic flare effect.
*
* @function
* @param {TextureNode} node - The node that represents the input of the effect.
* @param {Node<float> | Number} [threshold=0.9] - The threshold is one option to control the intensity and size of the effect.
* @param {Node<float> | Number} [scale=3] - Defines the vertical scale of the flares.
* @param {Number} [samples=32] - More samples result in larger flares and a more expensive runtime behavior.
* @returns {AnamorphicNode}
*/
export const anamorphic = ( node, threshold = .9, scale = 3, samples = 32 ) => nodeObject( new AnamorphicNode( convertToTexture( node ), nodeObject( threshold ), nodeObject( scale ), samples ) );
export default AnamorphicNode;