Initial commit

node_modules/three/examples/jsm/renderers/webgl-legacy/nodes/GLSL1NodeBuilder.js

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+import { MathNode, GLSLNodeParser, NodeBuilder, NodeMaterial } from '../../../nodes/Nodes.js';
+
+const glslMethods = {
+	[ MathNode.ATAN2 ]: 'atan'
+};
+
+const precisionLib = {
+	low: 'lowp',
+	medium: 'mediump',
+	high: 'highp'
+};
+
+class GLSL1NodeBuilder extends NodeBuilder {
+
+	constructor( object, renderer, scene = null ) {
+
+		super( object, renderer, new GLSLNodeParser(), scene );
+
+	}
+
+	getMethod( method ) {
+
+		return glslMethods[ method ] || method;
+
+	}
+
+	getTexture( texture, textureProperty, uvSnippet ) {
+
+		if ( texture.isTextureCube ) {
+
+			return `textureCube( ${textureProperty}, ${uvSnippet} )`;
+
+		} else {
+
+			return `texture2D( ${textureProperty}, ${uvSnippet} )`;
+
+		}
+
+	}
+
+	getTextureBias( texture, textureProperty, uvSnippet, biasSnippet ) {
+
+		if ( this.material.extensions !== undefined ) this.material.extensions.shaderTextureLOD = true;
+
+		return `textureLod( ${textureProperty}, ${uvSnippet}, ${biasSnippet} )`;
+
+	}
+
+	getVars( shaderStage ) {
+
+		const snippets = [];
+
+		const vars = this.vars[ shaderStage ];
+
+		for ( const variable of vars ) {
+
+			snippets.push( `${ this.getVar( variable.type, variable.name ) };` );
+
+		}
+
+		return snippets.join( '\n\t' );
+
+	}
+
+	getUniforms( shaderStage ) {
+
+		const uniforms = this.uniforms[ shaderStage ];
+
+		let output = '';
+
+		for ( const uniform of uniforms ) {
+
+			let snippet = null;
+
+			if ( uniform.type === 'texture' ) {
+
+				snippet = `sampler2D ${uniform.name};\n`;
+
+			} else if ( uniform.type === 'cubeTexture' ) {
+
+				snippet = `samplerCube ${uniform.name};\n`;
+
+			} else {
+
+				const vectorType = this.getVectorType( uniform.type );
+
+				snippet = `${vectorType} ${uniform.name};\n`;
+
+			}
+
+			const precision = uniform.node.precision;
+
+			if ( precision !== null ) {
+
+				snippet = 'uniform ' + precisionLib[ precision ] + ' ' + snippet;
+
+			} else {
+
+				snippet = 'uniform ' + snippet;
+
+			}
+
+			output += snippet;
+
+		}
+
+		return output;
+
+	}
+
+	getAttributes( shaderStage ) {
+
+		let snippet = '';
+
+		if ( shaderStage === 'vertex' ) {
+
+			const attributes = this.attributes;
+
+			for ( const attribute of attributes ) {
+
+				snippet += `attribute ${attribute.type} ${attribute.name};\n`;
+
+			}
+
+		}
+
+		return snippet;
+
+	}
+
+	getVaryings( shaderStage ) {
+
+		let snippet = '';
+
+		const varyings = this.varyings;
+
+		if ( shaderStage === 'vertex' ) {
+
+			for ( const varying of varyings ) {
+
+				snippet += `${varying.needsInterpolation ? 'varying' : '/*varying*/'} ${varying.type} ${varying.name};\n`;
+
+			}
+
+		} else if ( shaderStage === 'fragment' ) {
+
+			for ( const varying of varyings ) {
+
+				if ( varying.needsInterpolation ) {
+
+					snippet += `varying ${varying.type} ${varying.name};\n`;
+
+				}
+
+			}
+
+		}
+
+		return snippet;
+
+	}
+
+	getVertexIndex() {
+
+		return 'gl_VertexID';
+
+	}
+
+	getFrontFacing() {
+
+		return 'gl_FrontFacing';
+
+	}
+
+	getFragCoord() {
+
+		return 'gl_FragCoord';
+
+	}
+
+	isFlipY() {
+
+		return true;
+
+	}
+
+	_getGLSLVertexCode( shaderData ) {
+
+		return `${ this.getSignature() }
+
+// uniforms
+${shaderData.uniforms}
+
+// varyings
+${shaderData.varyings}
+
+// attributes
+${shaderData.attributes}
+
+// codes
+${shaderData.codes}
+
+void main() {
+
+	// vars
+	${shaderData.vars}
+
+	// flow
+	${shaderData.flow}
+
+}
+`;
+
+	}
+
+	_getGLSLFragmentCode( shaderData ) {
+
+		return `${ this.getSignature() }
+
+// precision
+precision highp float;
+precision highp int;
+
+// uniforms
+${shaderData.uniforms}
+
+// varyings
+${shaderData.varyings}
+
+// codes
+${shaderData.codes}
+
+void main() {
+
+	// vars
+	${shaderData.vars}
+
+	// flow
+	${shaderData.flow}
+
+}
+`;
+
+	}
+
+	buildCode() {
+
+		const shadersData = this.material !== null ? { fragment: {}, vertex: {} } : { compute: {} };
+
+		for ( const shaderStage in shadersData ) {
+
+			let flow = '// code\n\n';
+			flow += this.flowCode[ shaderStage ];
+
+			const flowNodes = this.flowNodes[ shaderStage ];
+			const mainNode = flowNodes[ flowNodes.length - 1 ];
+
+			for ( const node of flowNodes ) {
+
+				const flowSlotData = this.getFlowData( node/*, shaderStage*/ );
+				const slotName = node.name;
+
+				if ( slotName ) {
+
+					if ( flow.length > 0 ) flow += '\n';
+
+					flow += `\t// flow -> ${ slotName }\n\t`;
+
+				}
+
+				flow += `${ flowSlotData.code }\n\t`;
+
+				if ( node === mainNode && shaderStage !== 'compute' ) {
+
+					flow += '// result\n\t';
+
+					if ( shaderStage === 'vertex' ) {
+
+						flow += 'gl_Position = ';
+
+					} else if ( shaderStage === 'fragment' ) {
+
+						flow += 'gl_FragColor = ';
+
+					}
+
+					flow += `${ flowSlotData.result };`;
+
+				}
+
+			}
+
+			const stageData = shadersData[ shaderStage ];
+
+			stageData.uniforms = this.getUniforms( shaderStage );
+			stageData.attributes = this.getAttributes( shaderStage );
+			stageData.varyings = this.getVaryings( shaderStage );
+			stageData.vars = this.getVars( shaderStage );
+			stageData.codes = this.getCodes( shaderStage );
+			stageData.flow = flow;
+
+		}
+
+		if ( this.material !== null ) {
+
+			this.vertexShader = this._getGLSLVertexCode( shadersData.vertex );
+			this.fragmentShader = this._getGLSLFragmentCode( shadersData.fragment );
+
+		} else {
+
+			console.warn( 'GLSLNodeBuilder: compute shaders are not supported.' );
+			//this.computeShader = this._getGLSLComputeCode( shadersData.compute );
+
+		}
+
+	}
+
+	build() {
+
+		// @TODO: Move this code to super.build()
+
+		const { object, material } = this;
+
+		if ( material !== null ) {
+
+			NodeMaterial.fromMaterial( material ).build( this );
+
+		} else {
+
+			this.addFlow( 'compute', object );
+
+		}
+
+		return super.build();
+
+	}
+
+}
+
+export default GLSL1NodeBuilder;