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node_modules/three/examples/jsm/nodes/materials/NodeMaterial.js

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+import { Material, ShaderMaterial, NoColorSpace, LinearSRGBColorSpace } from 'three';
+import { getNodeChildren, getCacheKey } from '../core/NodeUtils.js';
+import { attribute } from '../core/AttributeNode.js';
+import { output, diffuseColor } from '../core/PropertyNode.js';
+import { materialAlphaTest, materialColor, materialOpacity, materialEmissive, materialNormal } from '../accessors/MaterialNode.js';
+import { modelViewProjection } from '../accessors/ModelViewProjectionNode.js';
+import { transformedNormalView } from '../accessors/NormalNode.js';
+import { instance } from '../accessors/InstanceNode.js';
+import { positionLocal, positionView } from '../accessors/PositionNode.js';
+import { skinning } from '../accessors/SkinningNode.js';
+import { morph } from '../accessors/MorphNode.js';
+import { texture } from '../accessors/TextureNode.js';
+import { cubeTexture } from '../accessors/CubeTextureNode.js';
+import { lightsWithoutWrap } from '../lighting/LightsNode.js';
+import { mix } from '../math/MathNode.js';
+import { float, vec3, vec4 } from '../shadernode/ShaderNode.js';
+import AONode from '../lighting/AONode.js';
+import { lightingContext } from '../lighting/LightingContextNode.js';
+import EnvironmentNode from '../lighting/EnvironmentNode.js';
+
+const NodeMaterials = new Map();
+
+class NodeMaterial extends ShaderMaterial {
+
+	constructor() {
+
+		super();
+
+		this.isNodeMaterial = true;
+
+		this.type = this.constructor.type;
+
+		this.forceSinglePass = false;
+
+		this.unlit = this.constructor === NodeMaterial.prototype.constructor; // Extended materials are not unlit by default
+
+		this.fog = true;
+		this.lights = true;
+		this.normals = true;
+		this.colorSpace = true;
+
+		this.lightsNode = null;
+		this.envNode = null;
+
+		this.colorNode = null;
+		this.normalNode = null;
+		this.opacityNode = null;
+		this.backdropNode = null;
+		this.backdropAlphaNode = null;
+		this.alphaTestNode = null;
+
+		this.positionNode = null;
+
+		this.outputNode = null; // @TODO: Rename to fragmentNode
+		this.vertexNode = null;
+
+	}
+
+	customProgramCacheKey() {
+
+		return this.type + getCacheKey( this );
+
+	}
+
+	build( builder ) {
+
+		this.setup( builder );
+
+	}
+
+	setup( builder ) {
+
+		// < VERTEX STAGE >
+
+		builder.addStack();
+
+		builder.stack.outputNode = this.setupPosition( builder );
+
+		builder.addFlow( 'vertex', builder.removeStack() );
+
+		// < FRAGMENT STAGE >
+
+		builder.addStack();
+
+		let outputNode;
+
+		if ( this.unlit === false ) {
+
+			if ( this.normals === true ) this.setupNormal( builder );
+
+			this.setupDiffuseColor( builder );
+			this.setupVariants( builder );
+
+			const outgoingLightNode = this.setupLighting( builder );
+
+			outputNode = this.setupOutput( builder, vec4( outgoingLightNode, diffuseColor.a ) );
+
+			// OUTPUT NODE
+
+			output.assign( outputNode );
+
+			//
+
+			if ( this.outputNode !== null ) outputNode = this.outputNode;
+
+		} else {
+
+			outputNode = this.setupOutput( builder, this.outputNode || vec4( 0, 0, 0, 1 ) );
+
+		}
+
+		builder.stack.outputNode = outputNode;
+
+		builder.addFlow( 'fragment', builder.removeStack() );
+
+	}
+
+	setupPosition( builder ) {
+
+		const object = builder.object;
+		const geometry = object.geometry;
+
+		builder.addStack();
+
+		if ( geometry.morphAttributes.position || geometry.morphAttributes.normal || geometry.morphAttributes.color ) {
+
+			morph( object ).append();
+
+		}
+
+		if ( object.isSkinnedMesh === true ) {
+
+			skinning( object ).append();
+
+		}
+
+		if ( ( object.instanceMatrix && object.instanceMatrix.isInstancedBufferAttribute === true ) && builder.isAvailable( 'instance' ) === true ) {
+
+			instance( object ).append();
+
+		}
+
+		if ( this.positionNode !== null ) {
+
+			positionLocal.assign( this.positionNode );
+
+		}
+
+		builder.context.vertex = builder.removeStack();
+
+		return this.vertexNode || modelViewProjection();
+
+	}
+
+	setupDiffuseColor( { geometry } ) {
+
+		let colorNode = this.colorNode ? vec4( this.colorNode ) : materialColor;
+
+		// VERTEX COLORS
+
+		if ( this.vertexColors === true && geometry.hasAttribute( 'color' ) ) {
+
+			colorNode = vec4( colorNode.xyz.mul( attribute( 'color' ) ), colorNode.a );
+
+		}
+
+		// COLOR
+
+		diffuseColor.assign( colorNode );
+
+		// OPACITY
+
+		const opacityNode = this.opacityNode ? float( this.opacityNode ) : materialOpacity;
+		diffuseColor.a.assign( diffuseColor.a.mul( opacityNode ) );
+
+		// ALPHA TEST
+
+		if ( this.alphaTestNode !== null || this.alphaTest > 0 ) {
+
+			const alphaTestNode = this.alphaTestNode !== null ? float( this.alphaTestNode ) : materialAlphaTest;
+
+			diffuseColor.a.lessThanEqual( alphaTestNode ).discard();
+
+		}
+
+	}
+
+	setupVariants( /*builder*/ ) {
+
+		// Interface function.
+
+	}
+
+	setupNormal() {
+
+		// NORMAL VIEW
+
+		if ( this.flatShading === true ) {
+
+			const normalNode = positionView.dFdx().cross( positionView.dFdy() ).normalize();
+
+			transformedNormalView.assign( normalNode );
+
+		} else {
+
+			const normalNode = this.normalNode ? vec3( this.normalNode ) : materialNormal;
+
+			transformedNormalView.assign( normalNode );
+
+		}
+
+	}
+
+	getEnvNode( builder ) {
+
+		let node = null;
+
+		if ( this.envNode ) {
+
+			node = this.envNode;
+
+		} else if ( this.envMap ) {
+
+			node = this.envMap.isCubeTexture ? cubeTexture( this.envMap ) : texture( this.envMap );
+
+		} else if ( builder.environmentNode ) {
+
+			node = builder.environmentNode;
+
+		}
+
+		return node;
+
+	}
+
+	setupLights( builder ) {
+
+		const envNode = this.getEnvNode( builder );
+
+		//
+
+		const materialLightsNode = [];
+
+		if ( envNode ) {
+
+			materialLightsNode.push( new EnvironmentNode( envNode ) );
+
+		}
+
+		if ( builder.material.aoMap ) {
+
+			materialLightsNode.push( new AONode( texture( builder.material.aoMap ) ) );
+
+		}
+
+		let lightsNode = this.lightsNode || builder.lightsNode;
+
+		if ( materialLightsNode.length > 0 ) {
+
+			lightsNode = lightsWithoutWrap( [ ...lightsNode.lightNodes, ...materialLightsNode ] );
+
+		}
+
+		return lightsNode;
+
+	}
+
+	setupLightingModel( /*builder*/ ) {
+
+		// Interface function.
+
+	}
+
+	setupLighting( builder ) {
+
+		const { material } = builder;
+		const { backdropNode, backdropAlphaNode, emissiveNode } = this;
+
+		// OUTGOING LIGHT
+
+		const lights = this.lights === true || this.lightsNode !== null;
+
+		const lightsNode = lights ? this.setupLights( builder ) : null;
+
+		let outgoingLightNode = diffuseColor.rgb;
+
+		if ( lightsNode && lightsNode.hasLight !== false ) {
+
+			const lightingModel = this.setupLightingModel( builder );
+
+			outgoingLightNode = lightingContext( lightsNode, lightingModel, backdropNode, backdropAlphaNode );
+
+		} else if ( backdropNode !== null ) {
+
+			outgoingLightNode = vec3( backdropAlphaNode !== null ? mix( outgoingLightNode, backdropNode, backdropAlphaNode ) : backdropNode );
+
+		}
+
+		// EMISSIVE
+
+		if ( ( emissiveNode && emissiveNode.isNode === true ) || ( material.emissive && material.emissive.isColor === true ) ) {
+
+			outgoingLightNode = outgoingLightNode.add( vec3( emissiveNode ? emissiveNode : materialEmissive ) );
+
+		}
+
+		return outgoingLightNode;
+
+	}
+
+	setupOutput( builder, outputNode ) {
+
+		const renderer = builder.renderer;
+
+		// TONE MAPPING
+
+		const toneMappingNode = builder.toneMappingNode;
+
+		if ( toneMappingNode ) {
+
+			outputNode = vec4( toneMappingNode.context( { color: outputNode.rgb } ), outputNode.a );
+
+		}
+
+		// FOG
+
+		if ( this.fog === true ) {
+
+			const fogNode = builder.fogNode;
+
+			if ( fogNode ) outputNode = vec4( fogNode.mixAssign( outputNode.rgb ), outputNode.a );
+
+		}
+
+		// ENCODING
+
+		if ( this.colorSpace === true ) {
+
+			const renderTarget = renderer.getRenderTarget();
+
+			let outputColorSpace;
+
+			if ( renderTarget !== null ) {
+
+				if ( Array.isArray( renderTarget.texture ) ) {
+
+					outputColorSpace = renderTarget.texture[ 0 ].colorSpace;
+
+				} else {
+
+					outputColorSpace = renderTarget.texture.colorSpace;
+
+				}
+
+			} else {
+
+				outputColorSpace = renderer.outputColorSpace;
+
+			}
+
+			if ( outputColorSpace !== LinearSRGBColorSpace && outputColorSpace !== NoColorSpace ) {
+
+				outputNode = outputNode.linearToColorSpace( outputColorSpace );
+
+			}
+
+		}
+
+		return outputNode;
+
+	}
+
+	setDefaultValues( material ) {
+
+		// This approach is to reuse the native refreshUniforms*
+		// and turn available the use of features like transmission and environment in core
+
+		for ( const property in material ) {
+
+			const value = material[ property ];
+
+			if ( this[ property ] === undefined ) {
+
+				this[ property ] = value;
+
+				if ( value && value.clone ) this[ property ] = value.clone();
+
+			}
+
+		}
+
+		Object.assign( this.defines, material.defines );
+
+		const descriptors = Object.getOwnPropertyDescriptors( material.constructor.prototype );
+
+		for ( const key in descriptors ) {
+
+			if ( Object.getOwnPropertyDescriptor( this.constructor.prototype, key ) === undefined &&
+			     descriptors[ key ].get !== undefined ) {
+
+				Object.defineProperty( this.constructor.prototype, key, descriptors[ key ] );
+
+			}
+
+		}
+
+	}
+
+	toJSON( meta ) {
+
+		const isRoot = ( meta === undefined || typeof meta === 'string' );
+
+		if ( isRoot ) {
+
+			meta = {
+				textures: {},
+				images: {},
+				nodes: {}
+			};
+
+		}
+
+		const data = Material.prototype.toJSON.call( this, meta );
+		const nodeChildren = getNodeChildren( this );
+
+		data.inputNodes = {};
+
+		for ( const { property, childNode } of nodeChildren ) {
+
+			data.inputNodes[ property ] = childNode.toJSON( meta ).uuid;
+
+		}
+
+		// TODO: Copied from Object3D.toJSON
+
+		function extractFromCache( cache ) {
+
+			const values = [];
+
+			for ( const key in cache ) {
+
+				const data = cache[ key ];
+				delete data.metadata;
+				values.push( data );
+
+			}
+
+			return values;
+
+		}
+
+		if ( isRoot ) {
+
+			const textures = extractFromCache( meta.textures );
+			const images = extractFromCache( meta.images );
+			const nodes = extractFromCache( meta.nodes );
+
+			if ( textures.length > 0 ) data.textures = textures;
+			if ( images.length > 0 ) data.images = images;
+			if ( nodes.length > 0 ) data.nodes = nodes;
+
+		}
+
+		return data;
+
+	}
+
+	copy( source ) {
+
+		this.lightsNode = source.lightsNode;
+		this.envNode = source.envNode;
+
+		this.colorNode = source.colorNode;
+		this.normalNode = source.normalNode;
+		this.opacityNode = source.opacityNode;
+		this.backdropNode = source.backdropNode;
+		this.backdropAlphaNode = source.backdropAlphaNode;
+		this.alphaTestNode = source.alphaTestNode;
+
+		this.positionNode = source.positionNode;
+
+		this.outputNode = source.outputNode;
+		this.vertexNode = source.vertexNode;
+
+		return super.copy( source );
+
+	}
+
+	static fromMaterial( material ) {
+
+		if ( material.isNodeMaterial === true ) { // is already a node material
+
+			return material;
+
+		}
+
+		const type = material.type.replace( 'Material', 'NodeMaterial' );
+
+		const nodeMaterial = createNodeMaterialFromType( type );
+
+		if ( nodeMaterial === undefined ) {
+
+			throw new Error( `NodeMaterial: Material "${ material.type }" is not compatible.` );
+
+		}
+
+		for ( const key in material ) {
+
+			nodeMaterial[ key ] = material[ key ];
+
+		}
+
+		return nodeMaterial;
+
+	}
+
+}
+
+export default NodeMaterial;
+
+export function addNodeMaterial( type, nodeMaterial ) {
+
+	if ( typeof nodeMaterial !== 'function' || ! type ) throw new Error( `Node material ${ type } is not a class` );
+	if ( NodeMaterials.has( type ) ) throw new Error( `Redefinition of node material ${ type }` );
+
+	NodeMaterials.set( type, nodeMaterial );
+	nodeMaterial.type = type;
+
+}
+
+export function createNodeMaterialFromType( type ) {
+
+	const Material = NodeMaterials.get( type );
+
+	if ( Material !== undefined ) {
+
+		return new Material();
+
+	}
+
+}
+
+addNodeMaterial( 'NodeMaterial', NodeMaterial );