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847 lines
15 KiB
847 lines
15 KiB
import NodeUniform from './NodeUniform.js';
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import NodeAttribute from './NodeAttribute.js';
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import NodeVarying from './NodeVarying.js';
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import NodeVar from './NodeVar.js';
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import NodeCode from './NodeCode.js';
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import NodeKeywords from './NodeKeywords.js';
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import { NodeUpdateType } from './constants.js';
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import { REVISION, LinearEncoding, Color, Vector2, Vector3, Vector4 } from 'three';
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export const defaultShaderStages = [ 'fragment', 'vertex' ];
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export const shaderStages = [ ...defaultShaderStages, 'compute' ];
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export const vector = [ 'x', 'y', 'z', 'w' ];
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const typeFromLength = new Map();
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typeFromLength.set( 2, 'vec2' );
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typeFromLength.set( 3, 'vec3' );
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typeFromLength.set( 4, 'vec4' );
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typeFromLength.set( 9, 'mat3' );
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typeFromLength.set( 16, 'mat4' );
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const toFloat = ( value ) => {
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value = Number( value );
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return value + ( value % 1 ? '' : '.0' );
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};
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class NodeBuilder {
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constructor( object, renderer, parser ) {
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this.object = object;
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this.material = object.material || null;
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this.geometry = object.geometry || null;
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this.renderer = renderer;
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this.parser = parser;
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this.nodes = [];
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this.updateNodes = [];
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this.hashNodes = {};
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this.scene = null;
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this.lightsNode = null;
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this.fogNode = null;
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this.vertexShader = null;
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this.fragmentShader = null;
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this.computeShader = null;
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this.flowNodes = { vertex: [], fragment: [], compute: [] };
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this.flowCode = { vertex: '', fragment: '', compute: [] };
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this.uniforms = { vertex: [], fragment: [], compute: [], index: 0 };
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this.codes = { vertex: [], fragment: [], compute: [] };
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this.attributes = [];
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this.varyings = [];
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this.vars = { vertex: [], fragment: [], compute: [] };
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this.flow = { code: '' };
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this.stack = [];
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this.context = {
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keywords: new NodeKeywords(),
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material: object.material
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};
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this.nodesData = new WeakMap();
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this.flowsData = new WeakMap();
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this.shaderStage = null;
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this.buildStage = null;
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}
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get node() {
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return this.stack[ this.stack.length - 1 ];
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}
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addStack( node ) {
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/*
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if ( this.stack.indexOf( node ) !== - 1 ) {
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console.warn( 'Recursive node: ', node );
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}
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*/
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this.stack.push( node );
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}
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removeStack( node ) {
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const lastStack = this.stack.pop();
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if ( lastStack !== node ) {
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throw new Error( 'NodeBuilder: Invalid node stack!' );
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}
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}
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setHashNode( node, hash ) {
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this.hashNodes[ hash ] = node;
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}
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addNode( node ) {
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if ( this.nodes.indexOf( node ) === - 1 ) {
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const updateType = node.getUpdateType( this );
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if ( updateType !== NodeUpdateType.NONE ) {
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this.updateNodes.push( node );
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}
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this.nodes.push( node );
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this.setHashNode( node, node.getHash( this ) );
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}
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}
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getMethod( method ) {
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return method;
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}
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getNodeFromHash( hash ) {
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return this.hashNodes[ hash ];
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}
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addFlow( shaderStage, node ) {
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this.flowNodes[ shaderStage ].push( node );
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return node;
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}
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setContext( context ) {
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this.context = context;
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}
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getContext() {
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return this.context;
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}
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isAvailable( /*name*/ ) {
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return false;
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}
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getInstanceIndex() {
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console.warn( 'Abstract function.' );
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}
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getFrontFacing() {
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console.warn( 'Abstract function.' );
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}
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getFragCoord() {
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console.warn( 'Abstract function.' );
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}
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isFlipY() {
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return false;
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}
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getTexture( /* textureProperty, uvSnippet */ ) {
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console.warn( 'Abstract function.' );
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}
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getTextureLevel( /* textureProperty, uvSnippet, levelSnippet */ ) {
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console.warn( 'Abstract function.' );
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}
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getCubeTexture( /* textureProperty, uvSnippet */ ) {
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console.warn( 'Abstract function.' );
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}
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getCubeTextureLevel( /* textureProperty, uvSnippet, levelSnippet */ ) {
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console.warn( 'Abstract function.' );
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}
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// @TODO: rename to .generateConst()
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getConst( type, value = null ) {
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if ( value === null ) {
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if ( type === 'float' || type === 'int' || type === 'uint' ) value = 0;
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else if ( type === 'bool' ) value = false;
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else if ( type === 'color' ) value = new Color();
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else if ( type === 'vec2' ) value = new Vector2();
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else if ( type === 'vec3' ) value = new Vector3();
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else if ( type === 'vec4' ) value = new Vector4();
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}
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if ( type === 'float' ) return toFloat( value );
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if ( type === 'int' ) return `${ Math.round( value ) }`;
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if ( type === 'uint' ) return value >= 0 ? `${ Math.round( value ) }u` : '0u';
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if ( type === 'bool' ) return value ? 'true' : 'false';
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if ( type === 'color' ) return `${ this.getType( 'vec3' ) }( ${ toFloat( value.r ) }, ${ toFloat( value.g ) }, ${ toFloat( value.b ) } )`;
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const typeLength = this.getTypeLength( type );
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const componentType = this.getComponentType( type );
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const getConst = value => this.getConst( componentType, value );
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if ( typeLength === 2 ) {
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return `${ this.getType( type ) }( ${ getConst( value.x ) }, ${ getConst( value.y ) } )`;
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} else if ( typeLength === 3 ) {
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return `${ this.getType( type ) }( ${ getConst( value.x ) }, ${ getConst( value.y ) }, ${ getConst( value.z ) } )`;
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} else if ( typeLength === 4 ) {
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return `${ this.getType( type ) }( ${ getConst( value.x ) }, ${ getConst( value.y ) }, ${ getConst( value.z ) }, ${ getConst( value.w ) } )`;
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} else if ( typeLength > 4 ) {
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return `${ this.getType( type ) }()`;
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}
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throw new Error( `NodeBuilder: Type '${type}' not found in generate constant attempt.` );
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}
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getType( type ) {
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return type;
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}
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generateMethod( method ) {
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return method;
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}
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hasGeometryAttribute( name ) {
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return this.geometry?.getAttribute( name ) !== undefined;
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}
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getAttribute( name, type ) {
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const attributes = this.attributes;
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// find attribute
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for ( const attribute of attributes ) {
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if ( attribute.name === name ) {
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return attribute;
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}
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}
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// create a new if no exist
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const attribute = new NodeAttribute( name, type );
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attributes.push( attribute );
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return attribute;
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}
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getPropertyName( node/*, shaderStage*/ ) {
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return node.name;
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}
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isVector( type ) {
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return /vec\d/.test( type );
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}
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isMatrix( type ) {
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return /mat\d/.test( type );
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}
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isReference( type ) {
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return type === 'void' || type === 'property' || type === 'sampler' || type === 'texture' || type === 'cubeTexture';
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}
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isShaderStage( shaderStage ) {
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return this.shaderStage === shaderStage;
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}
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getTextureEncodingFromMap( map ) {
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let encoding;
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if ( map && map.isTexture ) {
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encoding = map.encoding;
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} else if ( map && map.isWebGLRenderTarget ) {
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encoding = map.texture.encoding;
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} else {
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encoding = LinearEncoding;
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}
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return encoding;
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}
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getComponentType( type ) {
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type = this.getVectorType( type );
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if ( type === 'float' || type === 'bool' || type === 'int' || type === 'uint' ) return type;
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const componentType = /(b|i|u|)(vec|mat)([2-4])/.exec( type );
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if ( componentType === null ) return null;
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if ( componentType[ 1 ] === 'b' ) return 'bool';
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if ( componentType[ 1 ] === 'i' ) return 'int';
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if ( componentType[ 1 ] === 'u' ) return 'uint';
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return 'float';
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}
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getVectorType( type ) {
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if ( type === 'color' ) return 'vec3';
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if ( type === 'texture' ) return 'vec4';
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return type;
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}
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getTypeFromLength( length, componentType = 'float' ) {
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if ( length === 1 ) return componentType;
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const baseType = typeFromLength.get( length );
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const prefix = componentType === 'float' ? '' : componentType[ 0 ];
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return prefix + baseType;
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}
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getTypeLength( type ) {
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const vecType = this.getVectorType( type );
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const vecNum = /vec([2-4])/.exec( vecType );
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if ( vecNum !== null ) return Number( vecNum[ 1 ] );
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if ( vecType === 'float' || vecType === 'bool' || vecType === 'int' || vecType === 'uint' ) return 1;
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if ( /mat3/.test( type ) === true ) return 9;
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if ( /mat4/.test( type ) === true ) return 16;
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return 0;
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}
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getVectorFromMatrix( type ) {
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return type.replace( 'mat', 'vec' );
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}
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changeComponentType( type, newComponentType ) {
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return this.getTypeFromLength( this.getTypeLength( type ), newComponentType );
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}
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getIntegerType( type ) {
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const componentType = this.getComponentType( type );
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if ( componentType === 'int' || componentType === 'uint' ) return type;
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return this.changeComponentType( type, 'int' );
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}
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getDataFromNode( node, shaderStage = this.shaderStage ) {
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let nodeData = this.nodesData.get( node );
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if ( nodeData === undefined ) {
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nodeData = { vertex: {}, fragment: {}, compute: {} };
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this.nodesData.set( node, nodeData );
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}
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return shaderStage !== null ? nodeData[ shaderStage ] : nodeData;
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}
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getNodeProperties( node, shaderStage = this.shaderStage ) {
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const nodeData = this.getDataFromNode( this, shaderStage );
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const constructHash = node.getConstructHash( this );
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nodeData.properties = nodeData.properties || {};
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nodeData.properties[ constructHash ] = nodeData.properties[ constructHash ] || { outputNode: null };
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return nodeData.properties[ constructHash ];
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}
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getUniformFromNode( node, shaderStage, type ) {
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const nodeData = this.getDataFromNode( node, shaderStage );
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let nodeUniform = nodeData.uniform;
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if ( nodeUniform === undefined ) {
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const index = this.uniforms.index ++;
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nodeUniform = new NodeUniform( 'nodeUniform' + index, type, node );
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this.uniforms[ shaderStage ].push( nodeUniform );
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nodeData.uniform = nodeUniform;
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}
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return nodeUniform;
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}
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getVarFromNode( node, type, shaderStage = this.shaderStage ) {
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const nodeData = this.getDataFromNode( node, shaderStage );
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let nodeVar = nodeData.variable;
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if ( nodeVar === undefined ) {
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const vars = this.vars[ shaderStage ];
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const index = vars.length;
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nodeVar = new NodeVar( 'nodeVar' + index, type );
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vars.push( nodeVar );
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nodeData.variable = nodeVar;
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}
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return nodeVar;
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}
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getVaryingFromNode( node, type ) {
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const nodeData = this.getDataFromNode( node, null );
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let nodeVarying = nodeData.varying;
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if ( nodeVarying === undefined ) {
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const varyings = this.varyings;
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const index = varyings.length;
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nodeVarying = new NodeVarying( 'nodeVarying' + index, type );
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varyings.push( nodeVarying );
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nodeData.varying = nodeVarying;
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}
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return nodeVarying;
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}
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getCodeFromNode( node, type, shaderStage = this.shaderStage ) {
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const nodeData = this.getDataFromNode( node );
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let nodeCode = nodeData.code;
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if ( nodeCode === undefined ) {
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const codes = this.codes[ shaderStage ];
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const index = codes.length;
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nodeCode = new NodeCode( 'nodeCode' + index, type );
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codes.push( nodeCode );
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nodeData.code = nodeCode;
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}
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return nodeCode;
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}
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addFlowCode( code ) {
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this.flow.code += code;
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}
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getFlowData( node/*, shaderStage*/ ) {
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return this.flowsData.get( node );
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}
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flowNode( node ) {
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const output = node.getNodeType( this );
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const flowData = this.flowChildNode( node, output );
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this.flowsData.set( node, flowData );
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return flowData;
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}
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flowChildNode( node, output = null ) {
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const previousFlow = this.flow;
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const flow = {
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code: '',
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};
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this.flow = flow;
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flow.result = node.build( this, output );
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this.flow = previousFlow;
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return flow;
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}
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flowNodeFromShaderStage( shaderStage, node, output = null, propertyName = null ) {
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const previousShaderStage = this.shaderStage;
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this.setShaderStage( shaderStage );
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const flowData = this.flowChildNode( node, output );
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if ( propertyName !== null ) {
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flowData.code += `${propertyName} = ${flowData.result};\n\t`;
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}
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this.flowCode[ shaderStage ] = this.flowCode[ shaderStage ] + flowData.code;
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this.setShaderStage( previousShaderStage );
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return flowData;
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}
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getAttributes( /*shaderStage*/ ) {
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console.warn( 'Abstract function.' );
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}
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getVaryings( /*shaderStage*/ ) {
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console.warn( 'Abstract function.' );
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}
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getVars( shaderStage ) {
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let snippet = '';
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const vars = this.vars[ shaderStage ];
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for ( const variable of vars ) {
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snippet += `${variable.type} ${variable.name}; `;
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}
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return snippet;
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}
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getUniforms( /*shaderStage*/ ) {
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console.warn( 'Abstract function.' );
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}
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getCodes( shaderStage ) {
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const codes = this.codes[ shaderStage ];
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let code = '';
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for ( const nodeCode of codes ) {
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code += nodeCode.code + '\n';
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}
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return code;
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}
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getHash() {
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return this.vertexShader + this.fragmentShader + this.computeShader;
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}
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setShaderStage( shaderStage ) {
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this.shaderStage = shaderStage;
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}
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getShaderStage() {
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return this.shaderStage;
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}
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setBuildStage( buildStage ) {
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this.buildStage = buildStage;
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}
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getBuildStage() {
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return this.buildStage;
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}
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buildCode() {
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console.warn( 'Abstract function.' );
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}
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build() {
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// stage 1: generate shader node
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this.setBuildStage( 'construct' );
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for ( const shaderStage of shaderStages ) {
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this.setShaderStage( shaderStage );
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const flowNodes = this.flowNodes[ shaderStage ];
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for ( const node of flowNodes ) {
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node.build( this );
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}
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}
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// stage 2: analyze nodes to possible optimization and validation
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this.setBuildStage( 'analyze' );
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|
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for ( const shaderStage of shaderStages ) {
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|
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this.setShaderStage( shaderStage );
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const flowNodes = this.flowNodes[ shaderStage ];
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|
|
|
for ( const node of flowNodes ) {
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|
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node.build( this );
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|
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|
}
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}
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|
|
// stage 3: pre-build vertex code used in fragment shader
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|
|
|
this.setBuildStage( 'generate' );
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|
|
|
if ( this.context.vertex && this.context.vertex.isNode ) {
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|
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this.flowNodeFromShaderStage( 'vertex', this.context.vertex );
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|
|
|
}
|
|
|
|
// stage 4: generate shader
|
|
|
|
this.setBuildStage( 'generate' );
|
|
|
|
for ( const shaderStage of shaderStages ) {
|
|
|
|
this.setShaderStage( shaderStage );
|
|
|
|
const flowNodes = this.flowNodes[ shaderStage ];
|
|
|
|
for ( const node of flowNodes ) {
|
|
|
|
this.flowNode( node );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
this.setBuildStage( null );
|
|
this.setShaderStage( null );
|
|
|
|
// stage 5: build code for a specific output
|
|
|
|
this.buildCode();
|
|
|
|
return this;
|
|
|
|
}
|
|
|
|
format( snippet, fromType, toType ) {
|
|
|
|
fromType = this.getVectorType( fromType );
|
|
toType = this.getVectorType( toType );
|
|
|
|
if ( fromType === toType || toType === null || this.isReference( toType ) ) {
|
|
|
|
return snippet;
|
|
|
|
}
|
|
|
|
const fromTypeLength = this.getTypeLength( fromType );
|
|
const toTypeLength = this.getTypeLength( toType );
|
|
|
|
if ( fromTypeLength > 4 ) { // fromType is matrix-like
|
|
|
|
// @TODO: ignore for now
|
|
|
|
return snippet;
|
|
|
|
}
|
|
|
|
if ( toTypeLength > 4 || toTypeLength === 0 ) { // toType is matrix-like or unknown
|
|
|
|
// @TODO: ignore for now
|
|
|
|
return snippet;
|
|
|
|
}
|
|
|
|
if ( fromTypeLength === toTypeLength ) {
|
|
|
|
return `${ this.getType( toType ) }( ${ snippet } )`;
|
|
|
|
}
|
|
|
|
if ( fromTypeLength > toTypeLength ) {
|
|
|
|
return this.format( `${ snippet }.${ 'xyz'.slice( 0, toTypeLength ) }`, this.getTypeFromLength( toTypeLength ), toType );
|
|
|
|
}
|
|
|
|
if ( toTypeLength === 4 ) { // toType is vec4-like
|
|
|
|
return `${ this.getType( toType ) }( ${ this.format( snippet, fromType, 'vec3' ) }, 1.0 )`;
|
|
|
|
}
|
|
|
|
if ( fromTypeLength === 2 ) { // fromType is vec2-like and toType is vec3-like
|
|
|
|
return `${ this.getType( toType ) }( ${ this.format( snippet, fromType, 'vec2' ) }, 0.0 )`;
|
|
|
|
}
|
|
|
|
return `${ this.getType( toType ) }( ${ snippet } )`; // fromType is float-like
|
|
|
|
}
|
|
|
|
getSignature() {
|
|
|
|
return `// Three.js r${ REVISION } - NodeMaterial System\n`;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
export default NodeBuilder;
|
|
|