add dxf import

src/kiri/app/init/menu.js

@@ -126,7 +126,7 @@ function content(actions) {
                     menuItem(actions, { id: 'file-recent', lk: 'recent', text: 'recent', iconClass: 'fas fa-list' }),
                     menuItem(actions, {
                         id: 'file-import', lk: 'import', text: 'import', iconClass: 'fas fa-file-upload', children:
-                            input({ id: 'load-file', type: 'file', name: 'loadme', style: 'display:none', accept: '.km,.kmz,.stl,.obj,.svg,.png,.jpg,.jpeg,.gcode,.nc' })
+                            input({ id: 'load-file', type: 'file', name: 'loadme', style: 'display:none', accept: '.km,.kmz,.stl,.obj,.svg,.dxf,.png,.jpg,.jpeg,.gcode,.nc' })
                     }),
                     hr(),
                     menuItem(actions, { id: 'mesh-export-obj', lk: 'export-obj', text: 'save as OBJ', iconClass: 'fas fa-dice-d20' }),

src/kiri/app/platform.js

@@ -979,6 +979,7 @@ function load_files(files, group) {
             isobj = lower.endsWith(".obj"),
             is3mf = lower.endsWith(".3mf"),
             issvg = lower.endsWith(".svg"),
+            isdxf = lower.endsWith(".dxf"),
             ispng = lower.endsWith(".png"),
             isjpg = lower.endsWith(".jpg"),
             iskmz = lower.endsWith(".kmz"),
@@ -1080,6 +1081,19 @@ function load_files(files, group) {
                     }
                     load_dec();
                 });
+            } else if (isdxf) {
+                loadDXFDialog(opt => {
+                    group = group || [];
+                    let dxf = file_load.DXF.parse(data.textDecode('utf-8'), opt);
+                    let ind = 0;
+                    if (dxf.length === 0) {
+                        api.show.alert(`DXF contains no supported entities`, 10);
+                    }
+                    for (let v of dxf) {
+                        load_verts(group, dxf[ind++], ind ? `${name}-${ind}` : name);
+                    }
+                    load_dec();
+                });
             }
             else if (iskmz) api.settings.import_zip(data, true);
             else if (isset) api.settings.import(data.textDecode('utf-8'), true);
@@ -1125,6 +1139,37 @@ function loadSVGDialog(doit) {
     });
 }
 
+/**
+ * Show dialog to configure DXF import settings.
+ * Prompts for extrusion depth, arc segment size, and nesting.
+ * @param {Function} doit - Callback with options: {soup, depth, segmentSize, minSegments}
+ * @private
+ */
+function loadDXFDialog(doit) {
+    const opt = {pre: [
+        "<div class='f-col a-center'>",
+        "  <h3>Import DXF</h3>",
+        "  <p class='t-just' style='width:300px;line-height:1.5em'>",
+        "  Extrude a 3D model from a 2D DXF.",
+        "  Supports POLYLINE, LWPOLYLINE, LINE, CIRCLE, and ARC entities.",
+        "  </p>",
+        "  <div class='f-row t-right'><table>",
+        "  <tr><th>z height in mm</th><td><input id='dxf-depth' value='5' size='3'></td></tr>",
+        "  <tr><th title='target length of each line segment when converting arcs and circles'>arc segment size in mm</th><td><input id='dxf-seg' value='1' size='3'></td></tr>",
+        "  <tr><th title='minimum number of segments for very small arcs to avoid degenerate geometry'>minimum arc segments</th><td><input id='dxf-min' value='4' size='3'></td></tr>",
+        "  <tr><th>nest shapes</th><td><input id='dxf-nest' value='1' type='checkbox' checked></td></tr>",
+        "  </table></div>",
+        "</div>"
+    ]};
+    api.uc.confirm(undefined, {convert:true, cancel:false}, undefined, opt).then((ok) => {
+        let depth = Math.max(0.1, parseFloat($('dxf-depth').value));
+        let segmentSize = Math.max(0.01, parseFloat($('dxf-seg').value));
+        let minSegments = Math.max(3, parseInt($('dxf-min').value));
+        let soup = $('dxf-nest').checked;
+        ok && doit({ soup, depth, segmentSize, minSegments });
+    });
+}
+
 /**
  * Expand platform bed depth to fit widgets (belt mode only).
  * Finds maximum Y dimension of all widgets and expands bed if needed.

src/load/dxf.js

@@ -0,0 +1,359 @@
+/** Copyright Stewart Allen <sa@grid.space> -- All Rights Reserved */
+
+import { newPolygon } from '../geo/polygon.js';
+import { newPoint } from '../geo/point.js';
+import { polygons } from '../geo/polygons.js';
+
+export function parseAsync(text, opt) {
+    return new Promise((resolve, reject) => {
+        try {
+            resolve(parse(text, opt));
+        } catch (e) {
+            reject(e);
+        }
+    });
+}
+
+export function parse(text, opt = { }) {
+    const justPoly = opt.flat || false;
+    const fromSoup = opt.soup !== false || justPoly;
+    const depth = parseFloat(opt.depth || 5);
+    const segmentSize = parseFloat(opt.segmentSize || 1); // default 1mm segments
+    const minSegments = parseInt(opt.minSegments || 4); // minimum segments for very small arcs
+    const objs = [];
+    const polys = [];
+
+    // Parse DXF file - normalize line endings and split
+    const lines = text.replace(/\r\n/g, '\n').replace(/\r/g, '\n').split('\n').map(l => l.trim());
+    const entities = extractEntities(lines);
+
+    // Convert entities to polygons
+    for (let entity of entities) {
+        if (entity.type === 'POLYLINE' || entity.type === 'LWPOLYLINE') {
+            if (entity.points.length < 2) {
+                continue;
+            }
+
+            let poly = newPolygon().addPoints(
+                entity.points.map(p => newPoint(p.x, p.y, p.z || 0))
+            ).clean();
+
+            // Check if closed
+            if (entity.closed && poly.appearsClosed()) {
+                poly.points.pop();
+            } else if (!entity.closed) {
+                poly.setOpen(true);
+            }
+
+            polys.push(poly);
+        } else if (entity.type === 'LINE') {
+            // Convert line to polyline
+            let poly = newPolygon().addPoints([
+                newPoint(entity.start.x, entity.start.y, entity.start.z || 0),
+                newPoint(entity.end.x, entity.end.y, entity.end.z || 0)
+            ]);
+            poly.setOpen(true);
+            polys.push(poly);
+        } else if (entity.type === 'CIRCLE') {
+            // Convert circle to polygon with points
+            // Calculate segments based on circumference and desired segment size
+            const circumference = 2 * Math.PI * entity.radius;
+            const segments = Math.max(minSegments, Math.ceil(circumference / segmentSize));
+            let points = [];
+            for (let i = 0; i < segments; i++) {
+                const angle = (i / segments) * Math.PI * 2;
+                points.push(newPoint(
+                    entity.center.x + Math.cos(angle) * entity.radius,
+                    entity.center.y + Math.sin(angle) * entity.radius,
+                    entity.center.z || 0
+                ));
+            }
+            let poly = newPolygon().addPoints(points).clean();
+            polys.push(poly);
+        } else if (entity.type === 'ARC') {
+            // Convert arc to polyline
+            // Calculate segments based on arc length and desired segment size
+            const arcLength = Math.abs(entity.endAngle - entity.startAngle) * entity.radius;
+            const segments = Math.max(minSegments, Math.ceil(arcLength / segmentSize));
+            let points = [];
+            for (let i = 0; i <= segments; i++) {
+                const angle = entity.startAngle + (i / segments) * (entity.endAngle - entity.startAngle);
+                points.push(newPoint(
+                    entity.center.x + Math.cos(angle) * entity.radius,
+                    entity.center.y + Math.sin(angle) * entity.radius,
+                    entity.center.z || 0
+                ));
+            }
+            let poly = newPolygon().addPoints(points);
+            poly.setOpen(true);
+            polys.push(poly);
+        }
+    }
+
+    // Nest polygons to identify holes vs outlines
+    const sub = fromSoup ? polygons.nest(polys) : polys;
+    const nest = sub.filter(p => {
+        for (let pc of polys) {
+            if (pc === p) {
+                return true;
+            } else {
+                return !pc.isEquivalent(p);
+            }
+        }
+    });
+
+    if (justPoly) {
+        return nest;
+    }
+
+    // Extrude polygons to 3D
+    for (let poly of nest) {
+        let obj = poly.extrude(depth);
+        objs.push(obj);
+    }
+
+    return objs;
+}
+
+function extractEntities(lines) {
+    const entities = [];
+    let inEntities = false;
+    let i = 0;
+
+    while (i < lines.length - 1) {
+        const code = lines[i];
+        const value = lines[i + 1];
+
+        // Check if we're in the ENTITIES section
+        if (code === '0' && value === 'SECTION') {
+            if (i + 3 < lines.length && lines[i + 2] === '2' && lines[i + 3] === 'ENTITIES') {
+                inEntities = true;
+                i += 4;
+                continue;
+            }
+        }
+
+        if (code === '0' && value === 'ENDSEC' && inEntities) {
+            break;
+        }
+
+        if (inEntities && code === '0') {
+            if (value === 'POLYLINE') {
+                const entity = parsePolyline(lines, i);
+                if (entity) {
+                    entities.push(entity);
+                    i = entity.endIndex;
+                    continue;
+                }
+            } else if (value === 'LWPOLYLINE') {
+                const entity = parseLWPolyline(lines, i);
+                if (entity) {
+                    entities.push(entity);
+                    i = entity.endIndex;
+                    continue;
+                }
+            } else if (value === 'LINE') {
+                const entity = parseLine(lines, i);
+                if (entity) {
+                    entities.push(entity);
+                    i = entity.endIndex;
+                    continue;
+                }
+            } else if (value === 'CIRCLE') {
+                const entity = parseCircle(lines, i);
+                if (entity) {
+                    entities.push(entity);
+                    i = entity.endIndex;
+                    continue;
+                }
+            } else if (value === 'ARC') {
+                const entity = parseArc(lines, i);
+                if (entity) {
+                    entities.push(entity);
+                    i = entity.endIndex;
+                    continue;
+                }
+            }
+        }
+
+        i += 2;
+    }
+
+    return entities;
+}
+
+function parsePolyline(lines, start) {
+    let i = start + 2;
+    let closed = false;
+    const points = [];
+
+    // Read polyline flags
+    while (i < lines.length - 1) {
+        const code = lines[i];
+        const value = lines[i + 1];
+
+        if (code === '70') {
+            // Polyline flag: 1 = closed
+            closed = (parseInt(value) & 1) === 1;
+        }
+
+        if (code === '0' && value === 'VERTEX') {
+            const vertex = parseVertex(lines, i);
+            if (vertex) {
+                points.push(vertex.point);
+                i = vertex.endIndex;
+                continue;
+            }
+        }
+
+        if (code === '0' && value === 'SEQEND') {
+            return { type: 'POLYLINE', points, closed, endIndex: i + 2 };
+        }
+
+        i += 2;
+    }
+
+    return null;
+}
+
+function parseVertex(lines, start) {
+    let i = start + 2;
+    const point = { x: 0, y: 0, z: 0 };
+
+    while (i < lines.length - 1) {
+        const code = lines[i];
+        const value = lines[i + 1];
+
+        if (code === '10') point.x = parseFloat(value);
+        if (code === '20') point.y = parseFloat(value);
+        if (code === '30') point.z = parseFloat(value);
+
+        if (code === '0') {
+            return { point, endIndex: i };
+        }
+
+        i += 2;
+    }
+
+    return { point, endIndex: i };
+}
+
+function parseLWPolyline(lines, start) {
+    let i = start + 2;
+    let closed = false;
+    const points = [];
+    let currentPoint = null;
+
+    while (i < lines.length - 1) {
+        const code = lines[i];
+        const value = lines[i + 1];
+
+        if (code === '70') {
+            closed = (parseInt(value) & 1) === 1;
+        }
+
+        if (code === '10') {
+            if (currentPoint) {
+                points.push(currentPoint);
+            }
+            currentPoint = { x: parseFloat(value), y: 0, z: 0 };
+        }
+
+        if (code === '20' && currentPoint) {
+            currentPoint.y = parseFloat(value);
+        }
+
+        if (code === '0') {
+            if (currentPoint) {
+                points.push(currentPoint);
+            }
+            return { type: 'LWPOLYLINE', points, closed, endIndex: i };
+        }
+
+        i += 2;
+    }
+
+    if (currentPoint) {
+        points.push(currentPoint);
+    }
+
+    return { type: 'LWPOLYLINE', points, closed, endIndex: i };
+}
+
+function parseLine(lines, start) {
+    let i = start + 2;
+    const start_point = { x: 0, y: 0, z: 0 };
+    const end_point = { x: 0, y: 0, z: 0 };
+
+    while (i < lines.length - 1) {
+        const code = lines[i];
+        const value = lines[i + 1];
+
+        if (code === '10') start_point.x = parseFloat(value);
+        if (code === '20') start_point.y = parseFloat(value);
+        if (code === '30') start_point.z = parseFloat(value);
+        if (code === '11') end_point.x = parseFloat(value);
+        if (code === '21') end_point.y = parseFloat(value);
+        if (code === '31') end_point.z = parseFloat(value);
+
+        if (code === '0') {
+            return { type: 'LINE', start: start_point, end: end_point, endIndex: i };
+        }
+
+        i += 2;
+    }
+
+    return { type: 'LINE', start: start_point, end: end_point, endIndex: i };
+}
+
+function parseCircle(lines, start) {
+    let i = start + 2;
+    const center = { x: 0, y: 0, z: 0 };
+    let radius = 0;
+
+    while (i < lines.length - 1) {
+        const code = lines[i];
+        const value = lines[i + 1];
+
+        if (code === '10') center.x = parseFloat(value);
+        if (code === '20') center.y = parseFloat(value);
+        if (code === '30') center.z = parseFloat(value);
+        if (code === '40') radius = parseFloat(value);
+
+        if (code === '0') {
+            return { type: 'CIRCLE', center, radius, endIndex: i };
+        }
+
+        i += 2;
+    }
+
+    return { type: 'CIRCLE', center, radius, endIndex: i };
+}
+
+function parseArc(lines, start) {
+    let i = start + 2;
+    const center = { x: 0, y: 0, z: 0 };
+    let radius = 0;
+    let startAngle = 0;
+    let endAngle = 0;
+
+    while (i < lines.length - 1) {
+        const code = lines[i];
+        const value = lines[i + 1];
+
+        if (code === '10') center.x = parseFloat(value);
+        if (code === '20') center.y = parseFloat(value);
+        if (code === '30') center.z = parseFloat(value);
+        if (code === '40') radius = parseFloat(value);
+        if (code === '50') startAngle = parseFloat(value) * Math.PI / 180; // Convert to radians
+        if (code === '51') endAngle = parseFloat(value) * Math.PI / 180; // Convert to radians
+
+        if (code === '0') {
+            return { type: 'ARC', center, radius, startAngle, endAngle, endIndex: i };
+        }
+
+        i += 2;
+    }
+
+    return { type: 'ARC', center, radius, startAngle, endAngle, endIndex: i };
+}

src/load/file.js

@@ -6,6 +6,7 @@ import { STL } from './stl.js';
 import * as OBJ from './obj.js';
 import * as TMF from './3mf.js';
 import * as SVG from './svg.js';
+import * as DXF from './dxf.js';
 import * as GBR from './gbr.js';
 import { load as pngLoad } from './png.js';
 
@@ -36,6 +37,11 @@ const types = {
         resolve(opt.flat ? out : out.map(m => { return { mesh: m.toFloat32(), file } }));
     },
 
+    dxf(data, file, resolve, reject, opt = {}) {
+        let out = DXF.parse(data, opt);
+        resolve(opt.flat ? out : out.map(m => { return { mesh: m.toFloat32(), file } }));
+    },
+
     png(data, file, resolve, reject, opt = {}) {
         pngLoad.PNG.parse(data, {
             ...opt,
@@ -100,6 +106,6 @@ function load_file(file, opt) {
     });
 }
 
-Object.assign(load_file, { SVG, OBJ, STL, TMF, GBR, PNG: pngLoad.PNG });
+Object.assign(load_file, { SVG, DXF, OBJ, STL, TMF, GBR, PNG: pngLoad.PNG });
 
 export { types, as_buffer, load_data, load_file, load_file as load };

src/load/url.js

@@ -4,7 +4,7 @@
 
 import { load_file } from './file.js';
 
-const { STL, OBJ, TMF, SVG } = load_file;
+const { STL, OBJ, TMF, SVG, DXF } = load_file;
 const CDH = 'Content-Disposition';
 
 export function load_url(url, options = {}) {
@@ -12,7 +12,7 @@ export function load_url(url, options = {}) {
         let xhr = new XMLHttpRequest();
         let file = options.file || options.filename || (((url.split('?')[0]).split('#')[0]).split('/')).pop();
         let ext = file.split('.').pop().toLowerCase();
-        let deftype = ext === "obj" || ext === 'svg' ? "text" : "arraybuffer";
+        let deftype = ext === "obj" || ext === 'svg' || ext === 'dxf' ? "text" : "arraybuffer";
         let datatype = options.datatype || deftype;
         let formdata = options.formdata;
 
@@ -55,6 +55,9 @@ export function load_url(url, options = {}) {
                     case "svg":
                         resolve(SVG.parse(data).map(m => { return {mesh: m.toFloat32(), file} }));
                         break;
+                    case "dxf":
+                        resolve(DXF.parse(data).map(m => { return {mesh: m.toFloat32(), file} }));
+                        break;
                     default:
                         reject(`unknown file type: "${ext}" from ${url}`);
                         break;