最新代码

public/sdk/three/jsm/loaders/GCodeLoader.js

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+import {
+	BufferGeometry,
+	FileLoader,
+	Float32BufferAttribute,
+	Group,
+	LineBasicMaterial,
+	LineSegments,
+	Loader
+} from 'three';
+
+/**
+ * GCodeLoader is used to load gcode files usually used for 3D printing or CNC applications.
+ *
+ * Gcode files are composed by commands used by machines to create objects.
+ *
+ * @class GCodeLoader
+ * @param {Manager} manager Loading manager.
+ */
+
+class GCodeLoader extends Loader {
+
+	constructor( manager ) {
+
+		super( manager );
+
+		this.splitLayer = false;
+
+	}
+
+	load( url, onLoad, onProgress, onError ) {
+
+		const scope = this;
+
+		const loader = new FileLoader( scope.manager );
+		loader.setPath( scope.path );
+		loader.setRequestHeader( scope.requestHeader );
+		loader.setWithCredentials( scope.withCredentials );
+		loader.load( url, function ( text ) {
+
+			try {
+
+				onLoad( scope.parse( text ) );
+
+			} catch ( e ) {
+
+				if ( onError ) {
+
+					onError( e );
+
+				} else {
+
+					console.error( e );
+
+				}
+
+				scope.manager.itemError( url );
+
+			}
+
+		}, onProgress, onError );
+
+	}
+
+	parse( data ) {
+
+		let state = { x: 0, y: 0, z: 0, e: 0, f: 0, extruding: false, relative: false };
+		const layers = [];
+
+		let currentLayer = undefined;
+
+		const pathMaterial = new LineBasicMaterial( { color: 0xFF0000 } );
+		pathMaterial.name = 'path';
+
+		const extrudingMaterial = new LineBasicMaterial( { color: 0x00FF00 } );
+		extrudingMaterial.name = 'extruded';
+
+		function newLayer( line ) {
+
+			currentLayer = { vertex: [], pathVertex: [], z: line.z };
+			layers.push( currentLayer );
+
+		}
+
+		//Create lie segment between p1 and p2
+		function addSegment( p1, p2 ) {
+
+			if ( currentLayer === undefined ) {
+
+				newLayer( p1 );
+
+			}
+
+			if ( state.extruding ) {
+
+				currentLayer.vertex.push( p1.x, p1.y, p1.z );
+				currentLayer.vertex.push( p2.x, p2.y, p2.z );
+
+			} else {
+
+				currentLayer.pathVertex.push( p1.x, p1.y, p1.z );
+				currentLayer.pathVertex.push( p2.x, p2.y, p2.z );
+
+			}
+
+		}
+
+		function delta( v1, v2 ) {
+
+			return state.relative ? v2 : v2 - v1;
+
+		}
+
+		function absolute( v1, v2 ) {
+
+			return state.relative ? v1 + v2 : v2;
+
+		}
+
+		const lines = data.replace( /;.+/g, '' ).split( '\n' );
+
+		for ( let i = 0; i < lines.length; i ++ ) {
+
+			const tokens = lines[ i ].split( ' ' );
+			const cmd = tokens[ 0 ].toUpperCase();
+
+			//Argumments
+			const args = {};
+			tokens.splice( 1 ).forEach( function ( token ) {
+
+				if ( token[ 0 ] !== undefined ) {
+
+					const key = token[ 0 ].toLowerCase();
+					const value = parseFloat( token.substring( 1 ) );
+					args[ key ] = value;
+
+				}
+
+			} );
+
+			//Process commands
+			//G0/G1 – Linear Movement
+			if ( cmd === 'G0' || cmd === 'G1' ) {
+
+				const line = {
+					x: args.x !== undefined ? absolute( state.x, args.x ) : state.x,
+					y: args.y !== undefined ? absolute( state.y, args.y ) : state.y,
+					z: args.z !== undefined ? absolute( state.z, args.z ) : state.z,
+					e: args.e !== undefined ? absolute( state.e, args.e ) : state.e,
+					f: args.f !== undefined ? absolute( state.f, args.f ) : state.f,
+				};
+
+				//Layer change detection is or made by watching Z, it's made by watching when we extrude at a new Z position
+				if ( delta( state.e, line.e ) > 0 ) {
+
+					state.extruding = delta( state.e, line.e ) > 0;
+
+					if ( currentLayer == undefined || line.z != currentLayer.z ) {
+
+						newLayer( line );
+
+					}
+
+				}
+
+				addSegment( state, line );
+				state = line;
+
+			} else if ( cmd === 'G2' || cmd === 'G3' ) {
+
+				//G2/G3 - Arc Movement ( G2 clock wise and G3 counter clock wise )
+				//console.warn( 'THREE.GCodeLoader: Arc command not supported' );
+
+			} else if ( cmd === 'G90' ) {
+
+				//G90: Set to Absolute Positioning
+				state.relative = false;
+
+			} else if ( cmd === 'G91' ) {
+
+				//G91: Set to state.relative Positioning
+				state.relative = true;
+
+			} else if ( cmd === 'G92' ) {
+
+				//G92: Set Position
+				const line = state;
+				line.x = args.x !== undefined ? args.x : line.x;
+				line.y = args.y !== undefined ? args.y : line.y;
+				line.z = args.z !== undefined ? args.z : line.z;
+				line.e = args.e !== undefined ? args.e : line.e;
+
+			} else {
+
+				//console.warn( 'THREE.GCodeLoader: Command not supported:' + cmd );
+
+			}
+
+		}
+
+		function addObject( vertex, extruding, i ) {
+
+			const geometry = new BufferGeometry();
+			geometry.setAttribute( 'position', new Float32BufferAttribute( vertex, 3 ) );
+			const segments = new LineSegments( geometry, extruding ? extrudingMaterial : pathMaterial );
+			segments.name = 'layer' + i;
+			object.add( segments );
+
+		}
+
+		const object = new Group();
+		object.name = 'gcode';
+
+		if ( this.splitLayer ) {
+
+			for ( let i = 0; i < layers.length; i ++ ) {
+
+				const layer = layers[ i ];
+				addObject( layer.vertex, true, i );
+				addObject( layer.pathVertex, false, i );
+
+			}
+
+		} else {
+
+			const vertex = [],
+				pathVertex = [];
+
+			for ( let i = 0; i < layers.length; i ++ ) {
+
+				const layer = layers[ i ];
+				const layerVertex = layer.vertex;
+				const layerPathVertex = layer.pathVertex;
+
+				for ( let j = 0; j < layerVertex.length; j ++ ) {
+
+					vertex.push( layerVertex[ j ] );
+
+				}
+
+				for ( let j = 0; j < layerPathVertex.length; j ++ ) {
+
+					pathVertex.push( layerPathVertex[ j ] );
+
+				}
+
+			}
+
+			addObject( vertex, true, layers.length );
+			addObject( pathVertex, false, layers.length );
+
+		}
+
+		object.rotation.set( - Math.PI / 2, 0, 0 );
+
+		return object;
+
+	}
+
+}
+
+export { GCodeLoader };