analysis returns actionable data for visualization

src/mesh/api.js

@@ -109,6 +109,14 @@ let selection = {
         }
     },
 
+    analyze() {
+        tool.analyze(selection.models());
+    },
+
+    repair() {
+        tool.repair(selection.models());
+    },
+
     merge() {
         tool.merge(selection.models());
     },
@@ -283,24 +291,33 @@ let tool = {
         });
     },
 
-    analyze() {
+    analyze(models) {
         let promises = [];
         api.log.emit('analyzing mesh(es)...').pin();
-        for (let m of selection.models()) {
+        let areas = [];
+        let edges = [];
+        for (let m of models) {
             let p = worker.model_analyze(m.id).then(data => {
-                // console.log({data});
+                areas.appendAll(data.mapped.areas);
+                edges.appendAll(data.mapped.edges);
             });
             promises.push(p);
         }
         Promise.all(promises).then(() => {
+            let newmdl = areas.map(area => new mesh.model({
+                file: (area.length/3).toString(),
+                mesh: area.toFloat32()
+            }));
+            mesh.api.group.new(newmdl);
+            console.log({ areas, edges, newmdl });
             api.log.emit('analysis complete').unpin();
         });
     },
 
-    repair() {
+    repair(models) {
         let promises = [];
         api.log.emit('repairing mesh(es)...').pin();
-        for (let m of selection.models()) {
+        for (let m of models) {
             let p = worker.model_heal(m.id).then(data => {
                 if (data) {
                     m.reload(

src/mesh/model.js

@@ -85,7 +85,7 @@ mesh.model = class MeshModel extends mesh.object {
             matrix: this.matrix,
             id: this.id
         }).then(data => {
-            return mesh.api.group.new([new mesh.model({
+            mesh.api.group.new([new mesh.model({
                 file: `${this.file}-dup`,
                 mesh: data
             })]);

src/mesh/tool.js

@@ -91,23 +91,13 @@ mesh.tool = class MeshTool {
         } else {
             faces = faces.map(v => v*3);
         }
+        // unique vertex array
         this.vertices = vertices;
+        // unique face array. elements are offset into vertices
         this.faces = faces;
         return this;
     }
 
-    // return non-indexed vertex list (for compatibility)
-    unrolled() {
-        let out = [];
-        let vertices = this.vertices;
-        for (let face of this.faces) {
-            out.push(vertices[face]);
-            out.push(vertices[face+1]);
-            out.push(vertices[face+2]);
-        }
-        return out;
-    }
-
     /**
      * finds edge lines which are line segments on a single face.
      * construct ordered line maps with array of connected edges.
@@ -212,10 +202,16 @@ mesh.tool = class MeshTool {
             let l3 = getLine(v3, v1).addFace(i);
         }
 
+        // array of unique line segment records with vertices
+        // and a list of faces. one = edge, two = inside
+        // all lines should be inside or object is not manifold
+        // but does not preclude self-intersecting geometries
         this.lines = lines;
 
         // lines belonging to only one face are on the edge of a hole
         let edges = this.edges = lines.filter(l => l.faces.length === 1);
+
+        // arrays of connected edges that form a closed loop
         let loops = this.loops = [];
 
         // connect edge lines into closed loops
@@ -383,22 +379,64 @@ mesh.tool = class MeshTool {
             this.areas.push(emitLoop(loop));
         }
 
-        // track newly created faces when loop areas are merged
-        let faceCount = this.faces.length;
+        // auto-merge newly found enclosed areas
         if (opt.merge) {
             this.merge();
         }
-        this.newFaces = this.faces.length - faceCount;
+
+        // de-reference loops and edges
+        if (opt.mapped) {
+            this.mapped = {
+                edges: this.expandLoop(this.edges),
+                areas: this.areas.map(a => this.expandArray(a))
+            };
+        }
 
         return this;
     }
 
-    // merge poly areas into faces
+    // add vertex data from given index into array
+    appendVertex(index, array = []) {
+        let vertx = this.vertices;
+        array.push(vertx[index++]);
+        array.push(vertx[index++]);
+        array.push(vertx[index]);
+        return array;
+    }
+
+    // add vertices from a vertex index list to an array
+    expandArray(indices, array = []) {
+        for (let i of indices) {
+            this.appendVertex(i, array);
+        }
+        return array;
+    }
+
+    // turn loop into XYZ vertex array
+    expandLoop(loop, array = []) {
+        for (let line of loop) {
+            this.appendVertex(line.v1, array);
+            this.appendVertex(line.v2, array);
+        }
+        return array;
+    }
+
+    // merge generated poly areas into faces
     merge() {
         for (let area of this.areas || []) {
             this.faces.appendAll(area);
         }
     }
+
+    // return non-indexed vertex list (for compatibility)
+    unrolled() {
+        let out = [];
+        let vertices = this.vertices;
+        for (let face of this.faces) {
+            this.appendVertex(face, out);
+        }
+        return out;
+    }
 };
 
 })();

src/mesh/work.js

@@ -38,7 +38,7 @@ function translate_encode(id, matrix) {
     return geo.attributes.position.array;
 }
 
-function analyze(id) {
+function analyze(id, opt = {}) {
     log(`${id} | indexing...`);
     let geo = cache[id].geo;
     let tool = new mesh.tool({
@@ -47,7 +47,7 @@ function analyze(id) {
         debug: false
     });
     log(`${id} | analyzing...`);
-    tool.heal();
+    tool.heal(opt);
     dbug.log(tool);
     return tool;
 }
@@ -80,22 +80,20 @@ let model = {
     },
 
     analyze(id) {
-        let tool = analyze(id);
-        let { stats, newFaces } = tool;
+        let tool = analyze(id, { mapped: true });
+        let { stats, mapped } = tool;
         let { cull, dups, faces } = stats;
         log(`${id} | face count=${faces} bad=${cull} dup=${dups}`);
         log(`${id} | open loops=${tool.loops.length} edges=${tool.edges.length}`);
-        return {
-            new: newFaces
-        };
+        return { stats, mapped };
     },
 
     heal(id) {
         let tool = analyze(id);
         log(`${id} | unrolling...`);
-        return true || tool.newFaces ? {
+        return {
             vertices: tool.unrolled().toFloat32(),
-        } : 0;
+        };
     }
 };