add process.outputPurgeTower to allow disabling them. update three quat inverse to invert.

src/kiri/conf.js

@@ -339,6 +339,7 @@
                     outputShortPoly: 100.0,
                     outputMinSpeed: 10.0,
                     outputCoastDist: 0,
+                    outputPurgeTower: true,
                     outputLayerRetract: false,
                     outputOriginCenter: true,
                     outputLoopLayers: "",

src/kiri/init.js

@@ -74,15 +74,16 @@
         if (!SDB[SEED]) {
             SDB[SEED] = new Date().getTime();
             if (!SETUP.s && API.feature.seed) {
+                if (SETUP.debug) {
+                    return then();
+                }
                 platform.load_stl("/obj/cube.stl", function(vert) {
                     CATALOG.putFile("sample cube.stl", vert);
                     platform.compute_max_z();
                     SPACE.view.home();
                     setTimeout(() => { API.space.save(true) },500);
                     then();
-                    if (!SETUP.debug) {
-                        API.help.show();
-                    }
+                    API.help.show();
                 });
                 return true;
             }
@@ -1360,6 +1361,11 @@
         }
     }
 
+    function isMultiHead() {
+        let dev = API.conf.get().device;
+        return dev.extruders && dev.extruders.length > 1;
+    }
+
     function isBelt() {
         return UI.deviceBelt.checked;
     }
@@ -1796,6 +1802,7 @@
             gcodePauseLayers:    UC.newInput(LANG.ag_paws_s, {title:LANG.ag_paws_l, modes:FDM, comma:true, show:isNotBelt}),
             outputLoopLayers:    UC.newInput(LANG.ag_loop_s, {title:LANG.ag_loop_l, modes:FDM, comma:true, show:isBelt}),
             outputLayerRetract:  UC.newBoolean(LANG.ad_lret_s, onBooleanClick, {title:LANG.ad_lret_l, modes:FDM}),
+            outputPurgeTower:    UC.newBoolean(LANG.ad_purg_s, onBooleanClick, {title:LANG.ad_purg_l, modes:FDM, show:isMultiHead}),
 
             // SLA
             slaProc:             UC.newGroup(LANG.sa_menu, null, {modes:SLA, group:"sla-slice"}),

src/mode/fdm/prepare.js

@@ -38,6 +38,7 @@
             firstLayerSeek = process.outputSeekrate,
             firstLayerRate = process.firstLayerRate,
             firstLayerMult = process.firstLayerPrintMult,
+            purgeTower = process.outputPurgeTower || false,
             layerRetract = process.outputLayerRetract,
             layerno = 0,
             zoff = 0,
@@ -274,7 +275,7 @@
 
         // generate purge block for given nozzle
         function purge(nozzle, track, layer, start, z, using) {
-            if (extcount < 2 || isBelt) {
+            if (!purgeTower || extcount < 2 || isBelt) {
                 return start;
             }
             let rec = track[nozzle];

src/moto/ctrl.js

@@ -109,7 +109,7 @@ MOTO.CTRL = function (object, domElement, notify, slider) {
         lastQuaternion = new THREE.Quaternion(),
         // so camera.up is the orbit axis
         quat = new THREE.Quaternion().setFromUnitVectors(object.up, new THREE.Vector3(0, 1, 0)),
-        quatInverse = quat.clone().inverse(),
+        quatInverse = quat.clone().invert(),
         // touch tracking
         firstTouch = [],
         touchSlide = false,

web/kiri/lang/en.js

@@ -579,6 +579,8 @@ kiri.lang['en-us'] = {
     ad_play_l:      ["polish up to specified","# of layers at a time"],
     ad_pspd_s:      "polish speed",
     ad_pspd_l:      ["polishing speed","in millimeters / minute"],
+    ad_purg_s:      "purge tower",
+    ad_purg_l:      ["enable purge tower","for multiple extruders"],
 
     // CAM EXPERT
     cx_fast_s:      "skip shadow",