From f500ee0f5c926dbfc6e808838055425b2814a6d7 Mon Sep 17 00:00:00 2001
From: Stewart Allen <stewart.allen@gmail.com>
Date: Tue, 11 Jan 2022 16:29:54 -0500
Subject: [PATCH] add duplication and merging

---
 src/main/mesh.js  |  6 +++---
 src/mesh/api.js   | 44 +++++++++++++++++++++++++++++++++++++++-----
 src/mesh/build.js |  5 ++++-
 src/mesh/work.js  | 18 ++++++++++++------
 4 files changed, 58 insertions(+), 15 deletions(-)

diff --git a/src/main/mesh.js b/src/main/mesh.js
index c55767f5..68760c87 100644
--- a/src/main/mesh.js
+++ b/src/main/mesh.js
@@ -157,15 +157,15 @@ function space_init(data) {
             switch (code) {
                 case 'KeyD':
                     if (shiftKey) {
-                        for (let m of selection.models()) {
-                            m.duplicate();
-                        }
+                        return selection.duplicate();
                     }
                     break;
                 case 'KeyC':
                     return selection.centerXY().focus();
                 case 'KeyF':
                     return selection.floor().focus();
+                case 'KeyM':
+                    return selection.merge();
                 case 'KeyI':
                     return api.file.import();
                 case 'KeyX':
diff --git a/src/mesh/api.js b/src/mesh/api.js
index 7ce3611f..b1feee5a 100644
--- a/src/mesh/api.js
+++ b/src/mesh/api.js
@@ -103,6 +103,17 @@ let selection = {
         }
     },
 
+    duplicate() {
+        for (let m of selection.models()) {
+            m.duplicate();
+        }
+    },
+
+    merge() {
+        tool.merge(selection.models());
+    },
+
+    // update material selections
     update() {
         for (let group of groups) {
             group.material(mesh.material.unselected);
@@ -257,20 +268,40 @@ let file = {
 };
 
 let tool = {
+    merge(models) {
+        api.log.emit(`merging ${models.length} models`).pin();
+        worker.model_merge(models.map(m => {
+            return { id: m.id, matrix: m.matrix }
+        }))
+        .then(data => {
+            let group = api.group.new([new mesh.model({
+                file: `merged`,
+                mesh: data
+            })]).centerModels();
+            api.selection.set([group]);
+            api.log.emit('merge complete').unpin();
+        });
+    },
+
     analyze() {
+        let promises = [];
         api.log.emit('analyzing mesh(es)...').pin();
         for (let m of selection.models()) {
-            worker.model_analyze(m.id).then(data => {
-                console.log({data});
-                api.log.emit('analysis complete').unpin();
+            let p = worker.model_analyze(m.id).then(data => {
+                // console.log({data});
             });
+            promises.push(p);
         }
+        Promise.all(promises).then(() => {
+            api.log.emit('analysis complete').unpin();
+        });
     },
 
     repair() {
+        let promises = [];
         api.log.emit('repairing mesh(es)...').pin();
         for (let m of selection.models()) {
-            worker.model_heal(m.id).then(data => {
+            let p = worker.model_heal(m.id).then(data => {
                 if (data) {
                     m.reload(
                         data.vertices,
@@ -278,9 +309,12 @@ let tool = {
                         data.normals
                     );
                 }
-                api.log.emit('repair complete').unpin();
             });
+            promises.push(p);
         }
+        Promise.all(promises).then(() => {
+            api.log.emit('repair complete').unpin();
+        });
     }
 };
 
diff --git a/src/mesh/build.js b/src/mesh/build.js
index 9f1aa415..3dd83c16 100644
--- a/src/mesh/build.js
+++ b/src/mesh/build.js
@@ -225,7 +225,10 @@ function ui_build() {
             h.button({ _: 'gridlines', onclick() { api.grid() } }),
             h.button({ _: 'wireframe', onclick() { api.wireframe() } }),
             h.div({ class: "vsep" }),
-            h.button({ _: 'analyze', disabled: true }),
+            h.button({ _: 'duplicate', onclick: api.selection.duplicate }),
+            h.button({ _: 'merge', onclick: api.selection.merge }),
+            h.div({ class: "vsep" }),
+            h.button({ _: 'analyze', onclick: api.tool.analyze }),
             h.button({ _: 'repair', onclick: api.tool.repair }),
         ]),
     ]);
diff --git a/src/mesh/work.js b/src/mesh/work.js
index 7d31fc84..9de37325 100644
--- a/src/mesh/work.js
+++ b/src/mesh/work.js
@@ -65,12 +65,18 @@ let model = {
     duplicate(data) {
         let { id, matrix } = data;
         return translate_encode(id, matrix);
-        throw "should not here";
-        let rec = cache[id];
-        let geo = rec.geo.clone();
-        let m4 = core_matrix.clone().multiply( new THREE.Matrix4().fromArray(matrix) );
-        geo.applyMatrix4(m4);
-        return geo.attributes.position.array;
+    },
+
+    // merge several model vertices into a single array
+    merge(recs) {
+        let arrays = recs.map(rec => translate_encode(rec.id, rec.matrix));
+        let length = arrays.map(a => a.length).reduce((v,a) => v + a);
+        let data = new Float32Array(length);
+        for (let i=0, l=arrays.length, p=0; i<l; ) {
+            data.set(arrays[i], p);
+            p += arrays[i++].length;
+        }
+        return data;
     },
 
     analyze(id) {