stub in snap but requires more work and validating removal of some mouse dragging code

src/main/mesh.js

@@ -642,6 +642,12 @@ function set_wireframe_fog(fogx) {
     prefs.save();
 }
 
+function set_snap_value(snap) {
+    let { prefs } = mesh.api;
+    prefs.map.space.snap = parseFloat(snap || 1);
+    prefs.save();
+}
+
 // bind functions to topics
 broker.listeners({
     load_files,
@@ -655,7 +661,8 @@ broker.listeners({
     set_surface_radians,
     set_surface_radius,
     set_wireframe_opacity,
-    set_wireframe_fog
+    set_wireframe_fog,
+    set_snap_value
 });
 
 // remove version cache bust from url

src/mesh/api.js

@@ -1176,6 +1176,8 @@ const prefs = {
             scale_group_Z: true
         },
         space: {
+            snap: 1,
+            snapon: false,
             center: true,
             floor: true,
             wire: false,

src/mesh/build.js

@@ -284,7 +284,20 @@ api.settings = function() {
         }),
     ]);
 
-    modal.show('settings', h.div({ class: "settings" }, [ set1, set2, set3, set4 ] ));
+    // const set5 = h.div([
+    //     h.label({ class: "header", _: 'snap'}),
+    //     h.label('value'),
+    //     h.input({ type: "text", size: 5, value: parseFloat(space.snap || 1),
+    //         onchange: ev => call.set_snap_value(ev.target.value)
+    //     }),
+    //     h.label('enabled'),
+    //     h.input({ type: "checkbox",
+    //         onchange: ev => prefs.save( space.snapon = !space.snapon ),
+    //         [ space.snapon === true ? 'checked' : 'unchecked' ] : 1
+    //     }),
+    // ]);
+
+    modal.show('settings', h.div({ class: "settings" }, [ set1, set2, set3, set4, set5 ] ));
 }
 
 // create html elements

src/mesh/object.js

@@ -5,7 +5,7 @@
 // dep: add.three
 // dep: moto.license
 // dep: moto.broker
-// use: mesh.api
+// dep: mesh.api
 // use: mesh.util
 gapp.register("mesh.object", [], (root, exports) => {
 

src/moto/space.js

@@ -772,18 +772,18 @@ gapp.register("moto.space", [], (root, exports) => {
         requestRefresh();
     }
 
-    function alignTracking(point, rot, out) {
-        if (point && rot) {
-            alignedTracking = true;
-            trackPlane.position.set(point.x, point.y, point.z);
-            trackPlane.rotation.set(rot.x, rot.y, rot.z);
-            trackDelta = out;
-        } else {
-            alignedTracking = false;
-            trackPlane.position.set(0, 0, 0);
-            trackPlane.rotation.set(PI2, 0, 0);
-        }
-    }
+    // function alignTracking(point, rot, out) {
+    //     if (point && rot) {
+    //         alignedTracking = true;
+    //         trackPlane.position.set(point.x, point.y, point.z);
+    //         trackPlane.rotation.set(rot.x, rot.y, rot.z);
+    //         trackDelta = out;
+    //     } else {
+    //         alignedTracking = false;
+    //         trackPlane.position.set(0, 0, 0);
+    //         trackPlane.rotation.set(PI2, 0, 0);
+    //     }
+    // }
 
     function cca(c) {
         return c.charCodeAt(0);
@@ -1100,7 +1100,7 @@ gapp.register("moto.space", [], (root, exports) => {
         update: requestRefresh,
 
         setAntiAlias(b) { antiAlias = b ? true : false },
-        alignTracking: alignTracking,
+        // alignTracking: alignTracking,
         raycast: intersect,
 
         event: {