stl-manipulator.js•53.6 kB
import * as THREE from 'three';
import { STLLoader } from 'three/examples/jsm/loaders/STLLoader.js';
import { STLExporter } from 'three/examples/jsm/exporters/STLExporter.js';
import * as BufferGeometryUtils from 'three/examples/jsm/utils/BufferGeometryUtils.js';
import fs from 'fs';
import path from 'path';
import { promisify } from 'util';
import { EventEmitter } from 'events';
import * as crypto from 'crypto';
import { execFile } from 'child_process';
const readFileAsync = promisify(fs.readFile);
const writeFileAsync = promisify(fs.writeFile);
export class STLManipulator extends EventEmitter {
constructor(tempDir = path.join(process.cwd(), 'temp')) {
super();
this.activeOperations = new Map();
this.tempDir = tempDir;
// Ensure temp directory exists
if (!fs.existsSync(this.tempDir)) {
fs.mkdirSync(this.tempDir, { recursive: true });
}
}
/**
* Generate a unique operation ID
*/
generateOperationId() {
return crypto.randomUUID();
}
/**
* Load STL file and return geometry and bounding box
*/
async loadSTL(stlFilePath, progressCallback) {
try {
if (progressCallback)
progressCallback(10, "Loading STL file...");
// Read the STL file
const stlData = await readFileAsync(stlFilePath);
if (progressCallback)
progressCallback(30, "Parsing STL data...");
// Load the STL data into a Three.js geometry
const loader = new STLLoader();
const geometry = loader.parse(stlData.buffer);
// Create a mesh from the geometry
const material = new THREE.MeshStandardMaterial();
const mesh = new THREE.Mesh(geometry, material);
// Compute the bounding box
geometry.computeBoundingBox();
const boundingBox = geometry.boundingBox;
if (progressCallback)
progressCallback(50, "STL loaded successfully");
return { geometry, boundingBox, mesh };
}
catch (error) {
console.error("Error loading STL file:", error);
throw new Error(`Failed to load STL file: ${error instanceof Error ? error.message : String(error)}`);
}
}
/**
* Save a geometry to STL file
*/
async saveSTL(geometry, outputFilePath, progressCallback) {
try {
if (progressCallback)
progressCallback(80, "Exporting to STL...");
// Create mesh for export
const material = new THREE.MeshStandardMaterial();
const mesh = new THREE.Mesh(geometry, material);
// Export the mesh as STL
const exporter = new STLExporter();
const stlString = exporter.parse(mesh);
// Write the STL to file
await writeFileAsync(outputFilePath, stlString);
if (progressCallback)
progressCallback(100, "STL saved successfully");
return outputFilePath;
}
catch (error) {
console.error("Error saving STL file:", error);
throw new Error(`Failed to save STL file: ${error instanceof Error ? error.message : String(error)}`);
}
}
/**
* Get comprehensive information about an STL file
*/
async getSTLInfo(stlFilePath) {
try {
const { geometry, boundingBox } = await this.loadSTL(stlFilePath);
const fileStats = fs.statSync(stlFilePath);
// Count faces (each face is a triangle in STL)
const positionAttribute = geometry.getAttribute('position');
const vertexCount = positionAttribute.count;
const faceCount = vertexCount / 3;
// Calculate center and dimensions
const center = new THREE.Vector3();
boundingBox.getCenter(center);
const dimensions = new THREE.Vector3();
boundingBox.getSize(dimensions);
return {
filePath: stlFilePath,
fileName: path.basename(stlFilePath),
fileSize: fileStats.size,
boundingBox: {
min: boundingBox.min,
max: boundingBox.max,
center,
dimensions
},
vertexCount,
faceCount
};
}
catch (error) {
console.error("Error getting STL info:", error);
throw new Error(`Failed to get STL info: ${error instanceof Error ? error.message : String(error)}`);
}
}
/**
* Scale an STL model uniformly or along specific axes
*/
async scaleSTL(stlFilePath, scaleFactors, progressCallback) {
const operationId = this.generateOperationId();
this.activeOperations.set(operationId, true);
try {
if (progressCallback)
progressCallback(0, "Starting scaling operation...");
// Load the STL file
const { geometry, mesh } = await this.loadSTL(stlFilePath, progressCallback);
if (!this.activeOperations.get(operationId)) {
throw new Error("Operation cancelled");
}
if (progressCallback)
progressCallback(60, "Applying scaling transformation...");
// Apply scaling
let scaleX, scaleY, scaleZ;
if (typeof scaleFactors === 'number') {
// Uniform scaling
scaleX = scaleY = scaleZ = scaleFactors;
}
else {
// Non-uniform scaling
[scaleX, scaleY, scaleZ] = scaleFactors;
}
const scaleMatrix = new THREE.Matrix4().makeScale(scaleX, scaleY, scaleZ);
geometry.applyMatrix4(scaleMatrix);
if (!this.activeOperations.get(operationId)) {
throw new Error("Operation cancelled");
}
// Generate output file path
const outputFileName = path.basename(stlFilePath, '.stl') + '_scaled.stl';
const outputFilePath = path.join(this.tempDir, outputFileName);
// Save the modified STL
await this.saveSTL(geometry, outputFilePath, progressCallback);
this.emit('operationComplete', {
operationId,
type: 'scale',
success: true,
output: outputFilePath
});
return outputFilePath;
}
catch (error) {
this.emit('operationError', {
operationId,
type: 'scale',
error: error instanceof Error ? error.message : String(error)
});
throw error;
}
finally {
this.activeOperations.delete(operationId);
}
}
/**
* Rotate an STL model around specific axes
*/
async rotateSTL(stlFilePath, rotationAngles, // [x, y, z] in degrees
progressCallback) {
const operationId = this.generateOperationId();
this.activeOperations.set(operationId, true);
try {
if (progressCallback)
progressCallback(0, "Starting rotation operation...");
// Load the STL file
const { geometry, boundingBox } = await this.loadSTL(stlFilePath, progressCallback);
if (!this.activeOperations.get(operationId)) {
throw new Error("Operation cancelled");
}
if (progressCallback)
progressCallback(60, "Applying rotation transformation...");
// Convert degrees to radians
const [rotX, rotY, rotZ] = rotationAngles.map(angle => angle * Math.PI / 180);
// Get the center of the model
const center = new THREE.Vector3();
boundingBox.getCenter(center);
// Create translation matrices to rotate around the center
const toOriginMatrix = new THREE.Matrix4().makeTranslation(-center.x, -center.y, -center.z);
const rotationMatrix = new THREE.Matrix4().makeRotationFromEuler(new THREE.Euler(rotX, rotY, rotZ, 'XYZ'));
const fromOriginMatrix = new THREE.Matrix4().makeTranslation(center.x, center.y, center.z);
// Apply the transformations
geometry.applyMatrix4(toOriginMatrix);
geometry.applyMatrix4(rotationMatrix);
geometry.applyMatrix4(fromOriginMatrix);
if (!this.activeOperations.get(operationId)) {
throw new Error("Operation cancelled");
}
// Generate output file path
const outputFileName = path.basename(stlFilePath, '.stl') + '_rotated.stl';
const outputFilePath = path.join(this.tempDir, outputFileName);
// Save the modified STL
await this.saveSTL(geometry, outputFilePath, progressCallback);
this.emit('operationComplete', {
operationId,
type: 'rotate',
success: true,
output: outputFilePath
});
return outputFilePath;
}
catch (error) {
this.emit('operationError', {
operationId,
type: 'rotate',
error: error instanceof Error ? error.message : String(error)
});
throw error;
}
finally {
this.activeOperations.delete(operationId);
}
}
/**
* Translate (move) an STL model along specific axes
*/
async translateSTL(stlFilePath, translationValues, // [x, y, z] in mm
progressCallback) {
const operationId = this.generateOperationId();
this.activeOperations.set(operationId, true);
try {
if (progressCallback)
progressCallback(0, "Starting translation operation...");
// Load the STL file
const { geometry } = await this.loadSTL(stlFilePath, progressCallback);
if (!this.activeOperations.get(operationId)) {
throw new Error("Operation cancelled");
}
if (progressCallback)
progressCallback(60, "Applying translation transformation...");
// Apply translation
const [translateX, translateY, translateZ] = translationValues;
const translationMatrix = new THREE.Matrix4().makeTranslation(translateX, translateY, translateZ);
geometry.applyMatrix4(translationMatrix);
if (!this.activeOperations.get(operationId)) {
throw new Error("Operation cancelled");
}
// Generate output file path
const outputFileName = path.basename(stlFilePath, '.stl') + '_translated.stl';
const outputFilePath = path.join(this.tempDir, outputFileName);
// Save the modified STL
await this.saveSTL(geometry, outputFilePath, progressCallback);
this.emit('operationComplete', {
operationId,
type: 'translate',
success: true,
output: outputFilePath
});
return outputFilePath;
}
catch (error) {
this.emit('operationError', {
operationId,
type: 'translate',
error: error instanceof Error ? error.message : String(error)
});
throw error;
}
finally {
this.activeOperations.delete(operationId);
}
}
/**
* Cancel an ongoing operation
*/
cancelOperation(operationId) {
if (this.activeOperations.has(operationId)) {
this.activeOperations.set(operationId, false);
this.emit('operationCancelled', { operationId });
return true;
}
return false;
}
/**
* Generate an SVG visualization of an STL file from multiple angles
* @param stlFilePath Path to the STL file
* @param width Width of each view in pixels
* @param height Height of each view in pixels
* @param progressCallback Optional callback for progress updates
* @returns Path to the generated SVG file
*/
async generateVisualization(stlFilePath, width = 300, height = 300, progressCallback) {
const operationId = this.generateOperationId();
this.activeOperations.set(operationId, true);
try {
if (progressCallback)
progressCallback(0, "Starting visualization generation...");
// Load the STL file
const { geometry, boundingBox, mesh } = await this.loadSTL(stlFilePath, progressCallback);
if (!this.activeOperations.get(operationId)) {
throw new Error("Operation cancelled");
}
if (progressCallback)
progressCallback(50, "Setting up 3D scene...");
// Create a scene
const scene = new THREE.Scene();
scene.add(mesh);
// Create a camera
const camera = new THREE.PerspectiveCamera(75, width / height, 0.1, 1000);
// Calculate the ideal camera position based on bounding box
const size = new THREE.Vector3();
boundingBox.getSize(size);
const maxDim = Math.max(size.x, size.y, size.z);
const fov = camera.fov * (Math.PI / 180);
const cameraDistance = (maxDim / 2) / Math.tan(fov / 2) * 1.5; // 1.5 is a factor for some padding
// Add lighting to the scene
const ambientLight = new THREE.AmbientLight(0x404040); // soft white light
scene.add(ambientLight);
const directionalLight = new THREE.DirectionalLight(0xffffff, 0.5);
directionalLight.position.set(1, 1, 1).normalize();
scene.add(directionalLight);
if (!this.activeOperations.get(operationId)) {
throw new Error("Operation cancelled");
}
if (progressCallback)
progressCallback(60, "Generating SVG representation...");
// Since we can't use the DOM-dependent SVGRenderer in a Node.js environment,
// let's create a simple representation of the model using its bounding box
// This is a simplified visual representation
// Create SVG content with a simple representation of the STL model
const viewBox = `0 0 ${width * 2} ${height * 2}`;
let svgContent = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="${viewBox}" width="${width * 2}" height="${height * 2}">`;
// Add a title and model info
svgContent += `
<text x="10" y="20" font-family="Arial" font-size="16" fill="black">
STL Visualization: ${path.basename(stlFilePath)}
</text>
<text x="10" y="40" font-family="Arial" font-size="12" fill="black">
Dimensions: ${size.x.toFixed(2)} x ${size.y.toFixed(2)} x ${size.z.toFixed(2)} mm
</text>
`;
// Define views
const views = [
{ name: "front", transform: "rotateY(0deg)" },
{ name: "side", transform: "rotateY(90deg)" },
{ name: "top", transform: "rotateX(90deg)" },
{ name: "isometric", transform: "rotateX(30deg) rotateY(45deg)" }
];
// Draw each view
for (let i = 0; i < views.length; i++) {
const view = views[i];
const x = (i % 2) * width + width / 2;
const y = Math.floor(i / 2) * height + height / 2 + 50; // Add 50px for the header text
// Calculate a representative size for the simple cube visualization
const cubeSize = Math.min(width, height) * 0.4;
// Draw a simple cube representation
svgContent += `
<g transform="translate(${x}, ${y})">
<rect x="${-cubeSize / 2}" y="${-cubeSize / 2}" width="${cubeSize}" height="${cubeSize}"
style="fill:#e0e0e0;stroke:#000;stroke-width:1;opacity:0.8;${view.transform}" />
<text x="0" y="${cubeSize / 2 + 30}" text-anchor="middle" font-family="Arial" font-size="12" fill="black">
${view.name}
</text>
</g>
`;
if (progressCallback)
progressCallback(60 + (i + 1) * 10, `Generated ${view.name} view`);
}
// Add STL information
svgContent += `
<g transform="translate(20, ${height * 2 - 60})">
<text font-family="Arial" font-size="14" fill="black">
File: ${path.basename(stlFilePath)}
</text>
<text y="20" font-family="Arial" font-size="12" fill="black">
Vertices: ${mesh.geometry.attributes.position.count / 3}
</text>
<text y="40" font-family="Arial" font-size="12" fill="black">
Dimensions: W:${size.x.toFixed(2)}mm × H:${size.y.toFixed(2)}mm × D:${size.z.toFixed(2)}mm
</text>
</g>
`;
// Close the SVG
svgContent += '</svg>';
if (progressCallback)
progressCallback(90, "Visualization generated");
if (progressCallback)
progressCallback(90, "Saving visualization...");
// Write the SVG to file
const outputFileName = path.basename(stlFilePath, '.stl') + '_visualization.svg';
const outputFilePath = path.join(this.tempDir, outputFileName);
await writeFileAsync(outputFilePath, svgContent);
if (progressCallback)
progressCallback(100, "Visualization saved successfully");
this.emit('operationComplete', {
operationId,
type: 'visualization',
success: true,
output: outputFilePath
});
return outputFilePath;
}
catch (error) {
console.error("Error generating visualization:", error);
this.emit('operationError', {
operationId,
type: 'visualization',
error: error instanceof Error ? error.message : String(error)
});
throw new Error(`Failed to generate visualization: ${error instanceof Error ? error.message : String(error)}`);
}
finally {
this.activeOperations.delete(operationId);
}
}
/**
* Apply a specific transformation to a selected section of an STL file
* This allows for targeted modifications of specific parts of a model
*/
async modifySection(stlFilePath, selection, transformation, progressCallback) {
const operationId = this.generateOperationId();
this.activeOperations.set(operationId, true);
try {
if (progressCallback)
progressCallback(0, "Starting section modification...");
// Load the STL file
const { geometry, boundingBox, mesh } = await this.loadSTL(stlFilePath, progressCallback);
if (!this.activeOperations.get(operationId)) {
throw new Error("Operation cancelled");
}
if (progressCallback)
progressCallback(40, "Identifying section to modify...");
// Convert named sections to actual bounding boxes
let selectionBox;
if (selection === 'top') {
// Select top third of the model
const height = boundingBox.max.y - boundingBox.min.y;
const topThreshold = boundingBox.max.y - (height / 3);
selectionBox = new THREE.Box3(new THREE.Vector3(boundingBox.min.x, topThreshold, boundingBox.min.z), new THREE.Vector3(boundingBox.max.x, boundingBox.max.y, boundingBox.max.z));
}
else if (selection === 'bottom') {
// Select bottom third of the model
const height = boundingBox.max.y - boundingBox.min.y;
const bottomThreshold = boundingBox.min.y + (height / 3);
selectionBox = new THREE.Box3(new THREE.Vector3(boundingBox.min.x, boundingBox.min.y, boundingBox.min.z), new THREE.Vector3(boundingBox.max.x, bottomThreshold, boundingBox.max.z));
}
else if (selection === 'center') {
// Select middle third of the model
const height = boundingBox.max.y - boundingBox.min.y;
const bottomThreshold = boundingBox.min.y + (height / 3);
const topThreshold = boundingBox.max.y - (height / 3);
selectionBox = new THREE.Box3(new THREE.Vector3(boundingBox.min.x, bottomThreshold, boundingBox.min.z), new THREE.Vector3(boundingBox.max.x, topThreshold, boundingBox.max.z));
}
else {
// Use the provided bounding box
selectionBox = selection;
}
if (progressCallback)
progressCallback(50, "Applying transformation to selected section...");
// Get position attribute for direct manipulation
const positionAttribute = geometry.getAttribute('position');
const positions = positionAttribute.array;
// Create transformation matrix based on the requested operation
let transformMatrix = new THREE.Matrix4();
const center = new THREE.Vector3();
selectionBox.getCenter(center);
// Matrices for transforming around the selection center
const toOriginMatrix = new THREE.Matrix4().makeTranslation(-center.x, -center.y, -center.z);
const fromOriginMatrix = new THREE.Matrix4().makeTranslation(center.x, center.y, center.z);
// Build the appropriate transformation matrix
switch (transformation.type) {
case 'scale':
if (typeof transformation.value === 'number') {
transformMatrix = new THREE.Matrix4().makeScale(transformation.value, transformation.value, transformation.value);
}
else {
const [scaleX, scaleY, scaleZ] = transformation.value;
transformMatrix = new THREE.Matrix4().makeScale(scaleX, scaleY, scaleZ);
}
break;
case 'rotate':
const rotValues = (typeof transformation.value === 'number')
? [0, 0, transformation.value * Math.PI / 180]
: transformation.value.map(v => v * Math.PI / 180);
transformMatrix = new THREE.Matrix4().makeRotationFromEuler(new THREE.Euler(rotValues[0], rotValues[1], rotValues[2], 'XYZ'));
break;
case 'translate':
if (typeof transformation.value === 'number') {
const translateValue = transformation.value;
transformMatrix = new THREE.Matrix4().makeTranslation(translateValue, translateValue, translateValue);
}
else {
const [transX, transY, transZ] = transformation.value;
transformMatrix = new THREE.Matrix4().makeTranslation(transX, transY, transZ);
}
break;
default:
throw new Error(`Unsupported transformation type: ${transformation.type}`);
}
// Build complete transformation (to origin, transform, back from origin)
const finalTransform = new THREE.Matrix4()
.multiply(fromOriginMatrix)
.multiply(transformMatrix)
.multiply(toOriginMatrix);
// Create temporary vector for calculations
const tempVector = new THREE.Vector3();
try {
// Apply transformation only to vertices within the selection box
for (let i = 0; i < positionAttribute.count; i++) {
tempVector.fromBufferAttribute(positionAttribute, i);
// Check if this vertex is within our selection box
if (selectionBox.containsPoint(tempVector)) {
// Apply the transformation to this vertex
tempVector.applyMatrix4(finalTransform);
// Update the position in the buffer
positionAttribute.setXYZ(i, tempVector.x, tempVector.y, tempVector.z);
}
}
// Mark the attribute as needing an update
positionAttribute.needsUpdate = true;
// Update the geometry's bounding box
geometry.computeBoundingBox();
}
catch (error) {
console.error("Error modifying vertices:", error);
throw new Error(`Failed to modify section: ${error instanceof Error ? error.message : String(error)}`);
}
if (!this.activeOperations.get(operationId)) {
throw new Error("Operation cancelled");
}
// Generate output file path
const outputFileName = path.basename(stlFilePath, '.stl') + '_modified.stl';
const outputFilePath = path.join(this.tempDir, outputFileName);
// Save the modified STL
await this.saveSTL(geometry, outputFilePath, progressCallback);
this.emit('operationComplete', {
operationId,
type: 'modifySection',
success: true,
output: outputFilePath
});
return outputFilePath;
}
catch (error) {
this.emit('operationError', {
operationId,
type: 'modifySection',
error: error instanceof Error ? error.message : String(error)
});
throw error;
}
finally {
this.activeOperations.delete(operationId);
}
}
/**
* Enhanced version of extendBase with progress reporting
* @param stlFilePath Path to the input STL file
* @param extensionInches Amount to extend base in inches
* @param progressCallback Optional callback for progress updates
* @returns Path to the modified STL file
*/
async extendBase(stlFilePath, extensionInches, progressCallback) {
const operationId = this.generateOperationId();
this.activeOperations.set(operationId, true);
try {
if (progressCallback)
progressCallback(0, "Starting base extension operation...");
console.log(`Extending base of ${stlFilePath} by ${extensionInches} inches`);
// Load the STL file
const { geometry, boundingBox } = await this.loadSTL(stlFilePath, progressCallback);
if (!this.activeOperations.get(operationId)) {
throw new Error("Operation cancelled");
}
if (progressCallback)
progressCallback(60, "Creating extended base geometry...");
// Find the minimum Y value (assuming Y is up, which is common in 3D printing)
const minY = boundingBox.min.y;
// Convert inches to millimeters (STL files typically use mm)
const extensionMm = extensionInches * 25.4;
// Create a transformation matrix to move the mesh up by the extension amount
const matrix = new THREE.Matrix4().makeTranslation(0, extensionMm, 0);
geometry.applyMatrix4(matrix);
// Create a box geometry for the base extension
const baseWidth = boundingBox.max.x - boundingBox.min.x;
const baseDepth = boundingBox.max.z - boundingBox.min.z;
const baseGeometry = new THREE.BoxGeometry(baseWidth, extensionMm, baseDepth);
// Position the base geometry
const baseMatrix = new THREE.Matrix4().makeTranslation((boundingBox.min.x + boundingBox.max.x) / 2, minY + extensionMm / 2, (boundingBox.min.z + boundingBox.max.z) / 2);
baseGeometry.applyMatrix4(baseMatrix);
if (!this.activeOperations.get(operationId)) {
throw new Error("Operation cancelled");
}
if (progressCallback)
progressCallback(70, "Merging geometries...");
if (progressCallback)
progressCallback(75, "Creating merged geometry...");
// Create material for both meshes
const material = new THREE.MeshStandardMaterial();
// Create individual meshes
const originalMesh = new THREE.Mesh(geometry, material);
const baseMesh = new THREE.Mesh(baseGeometry, material);
// Export each mesh separately and merge the STL strings
const exporter = new STLExporter();
const originalStl = exporter.parse(originalMesh);
const baseStl = exporter.parse(baseMesh);
// Generate output file path
const outputFileName = path.basename(stlFilePath, '.stl') + '_extended.stl';
const outputFilePath = path.join(this.tempDir, outputFileName);
if (progressCallback)
progressCallback(90, "Saving extended STL...");
// Write the combined STL data to file
await writeFileAsync(outputFilePath, originalStl + baseStl);
if (progressCallback)
progressCallback(100, "STL saved successfully");
this.emit('operationComplete', {
operationId,
type: 'extendBase',
success: true,
output: outputFilePath
});
console.log(`Modified STL saved to ${outputFilePath}`);
return outputFilePath;
}
catch (error) {
console.error("Error extending STL base:", error);
this.emit('operationError', {
operationId,
type: 'extendBase',
error: error instanceof Error ? error.message : String(error)
});
throw new Error(`Failed to extend STL base: ${error instanceof Error ? error.message : String(error)}`);
}
finally {
this.activeOperations.delete(operationId);
}
}
/**
* Slice an STL file using the specified slicer
* @param stlFilePath Path to the input STL file
* @param slicerType Type of slicer (prusaslicer, cura, slic3r, orcaslicer)
* @param slicerPath Path to the slicer executable
* @param slicerProfile Optional path to the slicer profile/config file
* @param progressCallback Optional callback for progress updates
* @returns Path to the generated G-code file
*/
async sliceSTL(stlFilePath, slicerType, slicerPath, slicerProfile, progressCallback) {
const operationId = this.generateOperationId();
this.activeOperations.set(operationId, true);
if (!fs.existsSync(slicerPath)) {
throw new Error(`Slicer executable not found at: ${slicerPath}`);
}
if (slicerProfile && !fs.existsSync(slicerProfile)) {
console.warn(`Slicer profile specified but not found: ${slicerProfile}. Slicer might use defaults.`);
// Allow proceeding without profile, slicer might handle it
}
const outputFileName = path.basename(stlFilePath, '.stl') + '.gcode';
const outputFilePath = path.join(this.tempDir, outputFileName);
let args = [];
try {
if (progressCallback)
progressCallback(0, `Starting slicing with ${slicerType}...`);
switch (slicerType) {
case 'prusaslicer':
case 'slic3r': // PrusaSlicer and Slic3r share similar CLI args
args = [
'--slice',
'--output', outputFilePath,
'--load', slicerProfile || '', // Pass profile path
stlFilePath
];
// Remove empty profile arg if not provided
args = args.filter(arg => arg !== '');
break;
case 'orcaslicer': // Add OrcaSlicer case
args = [
// OrcaSlicer might use --load-settings like Bambu, or --load like Prusa
// Assuming --load-settings based on discussion, adjust if needed.
// Also assuming profile path points to the main .ini or .json config.
'--load-settings', slicerProfile || '',
'--output', outputFilePath, // Assuming --output works like PrusaSlicer
stlFilePath
];
// Alternative if --output doesn't specify filename:
// args = [
// '--load-settings', slicerProfile || '',
// '--outputdir', this.tempDir,
// stlFilePath
// ];
// Remove empty profile arg if not provided
args = args.filter(arg => arg !== '');
break;
case 'cura':
// CuraEngine CLI args are different, often requiring -s for settings
// Example: curaengine slice -v -j cura_settings.json -s layer_height=0.2 -o output.gcode -l input.stl
// This requires parsing the profile or passing individual settings.
// Keeping it simple for now, assuming profile contains necessary info.
args = [
'slice',
'-l', stlFilePath,
'-o', outputFilePath
];
if (slicerProfile) {
args.push('-j', slicerProfile); // Load settings from profile definition file
}
break;
default:
throw new Error(`Unsupported slicer type: ${slicerType}`);
}
if (progressCallback)
progressCallback(20, `Executing slicer: ${slicerPath} ${args.join(' ')}`);
console.log(`Executing: ${slicerPath} ${args.join(' ')}`);
// Execute the slicer
await new Promise((resolve, reject) => {
const process = execFile(slicerPath, args, (error, stdout, stderr) => {
if (error) {
console.error(`Slicer Error: ${error.message}`);
console.error(`Slicer Stderr: ${stderr}`);
reject(new Error(`Slicer failed: ${error.message}. Stderr: ${stderr}`));
}
else {
console.log(`Slicer Stdout: ${stdout}`);
if (stderr) {
console.warn(`Slicer Stderr: ${stderr}`); // Log stderr even on success
}
resolve();
}
});
// Optional: Add listeners for stdout/stderr for real-time progress if slicer provides it
// process.stdout?.on('data', (data) => { console.log(`Slicer stdout: ${data}`); });
// process.stderr?.on('data', (data) => { console.log(`Slicer stderr: ${data}`); });
// Check for cancellation periodically
const checkCancel = setInterval(() => {
if (!this.activeOperations.get(operationId)) {
clearInterval(checkCancel);
try {
process.kill(); // Attempt to kill the slicer process
reject(new Error("Slicing operation cancelled"));
}
catch (killError) {
console.error("Error attempting to kill slicer process:", killError);
reject(new Error("Slicing operation cancelled, but failed to kill process."));
}
}
}, 500);
process.on('exit', () => clearInterval(checkCancel));
process.on('error', () => clearInterval(checkCancel)); // Ensure interval cleared on process error too
});
if (!this.activeOperations.get(operationId)) {
// This check might be redundant if the promise rejected on kill, but good safety
throw new Error("Slicing operation cancelled after process finished");
}
if (!fs.existsSync(outputFilePath)) {
throw new Error(`Slicer finished but output file not found: ${outputFilePath}`);
}
if (progressCallback)
progressCallback(100, "Slicing completed successfully");
this.emit('operationComplete', {
operationId,
type: 'slice',
success: true,
output: outputFilePath
});
return outputFilePath;
}
catch (error) {
console.error(`Slicing failed for ${stlFilePath}:`, error);
this.emit('operationError', {
operationId,
type: 'slice',
error: error instanceof Error ? error.message : String(error)
});
throw error;
}
finally {
this.activeOperations.delete(operationId);
}
}
/**
* Enhanced version of confirmTemperatures with better error handling
* @param gcodePath Path to the G-code file
* @param expected Expected temperature settings
* @param progressCallback Optional callback for progress updates
* @returns Object with comparison results
*/
async confirmTemperatures(gcodePath, expected, progressCallback) {
const operationId = this.generateOperationId();
this.activeOperations.set(operationId, true);
try {
if (progressCallback)
progressCallback(0, "Starting temperature verification...");
// Verify the G-code file exists
if (!fs.existsSync(gcodePath)) {
throw new Error(`G-code file not found: ${gcodePath}`);
}
if (progressCallback)
progressCallback(20, "Reading G-code file...");
// Read the G-code file
const gcode = await readFileAsync(gcodePath, 'utf8');
const lines = gcode.split('\n');
if (!this.activeOperations.get(operationId)) {
throw new Error("Operation cancelled");
}
if (progressCallback)
progressCallback(50, "Analyzing temperature commands...");
// Extract temperature settings from G-code
const actual = {};
const allTemperatures = { extruder: [], bed: [] };
for (const line of lines) {
// Look for extruder temperature (M104 or M109)
const extruderMatch = line.match(/M10[49] S(\d+)/);
if (extruderMatch) {
const temp = parseInt(extruderMatch[1], 10);
allTemperatures.extruder.push(temp);
// Keep the first temperature for compatibility with original function
if (!actual.extruder) {
actual.extruder = temp;
}
}
// Look for bed temperature (M140 or M190)
const bedMatch = line.match(/M1[49]0 S(\d+)/);
if (bedMatch) {
const temp = parseInt(bedMatch[1], 10);
allTemperatures.bed.push(temp);
// Keep the first temperature for compatibility with original function
if (!actual.bed) {
actual.bed = temp;
}
}
}
if (progressCallback)
progressCallback(80, "Comparing temperatures...");
// Compare actual with expected
let match = true;
if (expected.extruder !== undefined && actual.extruder !== expected.extruder) {
match = false;
}
if (expected.bed !== undefined && actual.bed !== expected.bed) {
match = false;
}
if (progressCallback)
progressCallback(100, "Temperature verification complete");
this.emit('operationComplete', {
operationId,
type: 'confirmTemperatures',
success: true,
result: { match, actual, expected, allTemperatures }
});
return { match, actual, expected, allTemperatures };
}
catch (error) {
console.error("Error confirming temperatures:", error);
this.emit('operationError', {
operationId,
type: 'confirmTemperatures',
error: error instanceof Error ? error.message : String(error)
});
throw new Error(`Failed to confirm temperatures: ${error instanceof Error ? error.message : String(error)}`);
}
finally {
this.activeOperations.delete(operationId);
}
}
/**
* Merge vertices within a specified tolerance.
*/
async mergeVertices(stlFilePath, tolerance = 0.01, // Default tolerance in mm
progressCallback) {
const operationId = this.generateOperationId();
this.activeOperations.set(operationId, true);
try {
if (progressCallback)
progressCallback(0, "Starting vertex merging...");
const { geometry } = await this.loadSTL(stlFilePath, progressCallback); // 10-50% progress
if (!this.activeOperations.get(operationId))
throw new Error("Operation cancelled");
if (progressCallback)
progressCallback(60, "Merging vertices...");
const originalVertexCount = geometry.attributes.position.count;
const mergedGeometry = BufferGeometryUtils.mergeVertices(geometry, tolerance);
const newVertexCount = mergedGeometry.attributes.position.count;
console.log(`Merged vertices: ${originalVertexCount} -> ${newVertexCount} (Tolerance: ${tolerance}mm)`);
if (progressCallback)
progressCallback(70, `Vertices merged: ${originalVertexCount} -> ${newVertexCount}`);
if (!this.activeOperations.get(operationId))
throw new Error("Operation cancelled");
const outputFileName = path.basename(stlFilePath, '.stl') + '_merged.stl';
const outputFilePath = path.join(this.tempDir, outputFileName);
await this.saveSTL(mergedGeometry, outputFilePath, progressCallback); // 80-100% progress
this.emit('operationComplete', { operationId, type: 'mergeVertices', success: true, output: outputFilePath, verticesRemoved: originalVertexCount - newVertexCount });
return outputFilePath;
}
catch (error) {
this.emit('operationError', { operationId, type: 'mergeVertices', error: error instanceof Error ? error.message : String(error) });
throw error;
}
finally {
this.activeOperations.delete(operationId);
}
}
/**
* Center the model at the origin (0,0,0).
*/
async centerModel(stlFilePath, progressCallback) {
const operationId = this.generateOperationId();
this.activeOperations.set(operationId, true);
try {
if (progressCallback)
progressCallback(0, "Starting centering operation...");
const { geometry, boundingBox } = await this.loadSTL(stlFilePath, progressCallback); // 10-50% progress
if (!this.activeOperations.get(operationId))
throw new Error("Operation cancelled");
if (progressCallback)
progressCallback(60, "Calculating center...");
const center = new THREE.Vector3();
boundingBox.getCenter(center);
if (center.lengthSq() < 0.0001) { // Already centered (or very close)
if (progressCallback)
progressCallback(100, "Model is already centered.");
console.log("Model already centered. No changes made.");
this.emit('operationComplete', { operationId, type: 'centerModel', success: true, output: stlFilePath, message: "Model already centered." });
return stlFilePath; // Return original path
}
if (progressCallback)
progressCallback(70, `Applying translation: (${-center.x.toFixed(2)}, ${-center.y.toFixed(2)}, ${-center.z.toFixed(2)})`);
const translationMatrix = new THREE.Matrix4().makeTranslation(-center.x, -center.y, -center.z);
geometry.applyMatrix4(translationMatrix);
geometry.computeBoundingBox(); // Recompute bounds after moving
if (!this.activeOperations.get(operationId))
throw new Error("Operation cancelled");
const outputFileName = path.basename(stlFilePath, '.stl') + '_centered.stl';
const outputFilePath = path.join(this.tempDir, outputFileName);
await this.saveSTL(geometry, outputFilePath, progressCallback); // 80-100% progress
this.emit('operationComplete', { operationId, type: 'centerModel', success: true, output: outputFilePath });
return outputFilePath;
}
catch (error) {
this.emit('operationError', { operationId, type: 'centerModel', error: error instanceof Error ? error.message : String(error) });
throw error;
}
finally {
this.activeOperations.delete(operationId);
}
}
/**
* Rotate the model so its largest flat face lies on the XY plane (Z=0).
*/
async layFlat(stlFilePath, progressCallback) {
const operationId = this.generateOperationId();
this.activeOperations.set(operationId, true);
try {
if (progressCallback)
progressCallback(0, "Starting lay flat operation...");
const { geometry, boundingBox } = await this.loadSTL(stlFilePath, progressCallback); // 10-50%
if (!this.activeOperations.get(operationId))
throw new Error("Operation cancelled");
if (progressCallback)
progressCallback(55, "Analyzing faces...");
const positionAttribute = geometry.getAttribute('position');
if (!positionAttribute)
throw new Error("Geometry has no position attribute.");
const faces = [];
const vA = new THREE.Vector3();
const vB = new THREE.Vector3();
const vC = new THREE.Vector3();
const faceNormal = new THREE.Vector3();
const cb = new THREE.Vector3(), ab = new THREE.Vector3();
// Iterate through faces (triangles)
for (let i = 0; i < positionAttribute.count; i += 3) {
vA.fromBufferAttribute(positionAttribute, i);
vB.fromBufferAttribute(positionAttribute, i + 1);
vC.fromBufferAttribute(positionAttribute, i + 2);
// Calculate face normal
cb.subVectors(vC, vB);
ab.subVectors(vA, vB);
cb.cross(ab);
faceNormal.copy(cb).normalize();
// Calculate face area (using cross product magnitude / 2)
const area = cb.length() / 2;
faces.push({
normal: faceNormal.clone(),
area: area,
vertices: [vA.clone(), vB.clone(), vC.clone()] // Store vertices if needed for center calculation
});
}
if (faces.length === 0)
throw new Error("No faces found in geometry.");
if (!this.activeOperations.get(operationId))
throw new Error("Operation cancelled");
if (progressCallback)
progressCallback(65, "Grouping faces by normal...");
// Group faces by similar normal vectors (tolerance for floating point errors)
const normalGroups = new Map();
const tolerance = 1e-5;
for (const face of faces) {
let foundGroup = false;
for (const [key, group] of normalGroups.entries()) {
if (face.normal.distanceToSquared(group.representativeNormal) < tolerance) {
group.totalArea += face.area;
// Optional: Average the normal? For now, just use the first one.
foundGroup = true;
break;
}
}
if (!foundGroup) {
const key = `${face.normal.x.toFixed(5)},${face.normal.y.toFixed(5)},${face.normal.z.toFixed(5)}`;
if (!normalGroups.has(key)) { // Ensure unique key even if floats slightly differ after toFixed
normalGroups.set(key, { totalArea: face.area, representativeNormal: face.normal });
}
}
}
if (normalGroups.size === 0)
throw new Error("Could not group faces by normal.");
if (!this.activeOperations.get(operationId))
throw new Error("Operation cancelled");
if (progressCallback)
progressCallback(75, "Finding largest flat surface...");
// Find the group with the largest total area (excluding near-vertical faces)
let largestArea = 0;
let targetNormal = null;
const upVector = new THREE.Vector3(0, 1, 0); // Assuming Y is up for most models initially?
const downVector = new THREE.Vector3(0, 0, -1); // Target normal (pointing down)
for (const group of normalGroups.values()) {
// Check if the normal is reasonably horizontal (not too close to vertical Z)
// Angle threshold could be adjusted (e.g., > 5 degrees from Z axis)
if (Math.abs(group.representativeNormal.z) < 0.99 && group.totalArea > largestArea) {
largestArea = group.totalArea;
targetNormal = group.representativeNormal;
}
}
if (!targetNormal) {
// If no suitable horizontal face found, maybe pick the lowest Z face?
// For now, throw an error or return unchanged.
console.warn("Could not find a suitable large flat face to lay down. No changes made.");
this.emit('operationComplete', { operationId, type: 'layFlat', success: true, output: stlFilePath, message: "No suitable flat face found." });
return stlFilePath;
}
if (progressCallback)
progressCallback(80, "Calculating rotation...");
// Calculate the rotation needed to align targetNormal with downVector
const quaternion = new THREE.Quaternion().setFromUnitVectors(targetNormal, downVector);
const rotationMatrix = new THREE.Matrix4().makeRotationFromQuaternion(quaternion);
// Rotate around the model's center
const center = new THREE.Vector3();
boundingBox.getCenter(center);
const toOriginMatrix = new THREE.Matrix4().makeTranslation(-center.x, -center.y, -center.z);
const fromOriginMatrix = new THREE.Matrix4().makeTranslation(center.x, center.y, center.z);
// Apply rotation
geometry.applyMatrix4(toOriginMatrix);
geometry.applyMatrix4(rotationMatrix);
geometry.applyMatrix4(fromOriginMatrix);
// Translate so the new bottom is at Z=0
geometry.computeBoundingBox(); // Recompute bounds after rotation
const newMinZ = geometry.boundingBox.min.z;
const translateToZeroMatrix = new THREE.Matrix4().makeTranslation(0, 0, -newMinZ);
geometry.applyMatrix4(translateToZeroMatrix);
geometry.computeBoundingBox(); // Final bounds
if (!this.activeOperations.get(operationId))
throw new Error("Operation cancelled");
const outputFileName = path.basename(stlFilePath, '.stl') + '_flat.stl';
const outputFilePath = path.join(this.tempDir, outputFileName);
await this.saveSTL(geometry, outputFilePath, progressCallback); // 90-100% progress
this.emit('operationComplete', { operationId, type: 'layFlat', success: true, output: outputFilePath });
return outputFilePath;
}
catch (error) {
this.emit('operationError', { operationId, type: 'layFlat', error: error instanceof Error ? error.message : String(error) });
throw error;
}
finally {
this.activeOperations.delete(operationId);
}
}
}