stub in placeholder for fdm animation

src/kiri/main.js

@@ -287,7 +287,7 @@
             slice: prepareSlices,
             print: preparePreview,
             prepare: preparePreview,
-            animate: noop,
+            animate: prepareAnimation,
             export: prepareExport,
             cancel: cancelWorker,
             clear: KIRI.client.clear,
@@ -1221,6 +1221,10 @@
         });
     }
 
+    function prepareAnimation() {
+        API.event.emit("function.animate", {mode: settings.mode});
+    }
+
     function prepareExport() {
         const argsave = arguments;
         if (!complete.preview) {

src/kiri/stack.js

@@ -49,6 +49,7 @@
         }
 
         setLastFraction(frac = 1) {
+            if (this.lastVis)
             for (let mesh of this.lastVis.children) {
                 let geo = mesh.geometry;
                 let pos = geo.attributes.position;

src/mode/cam/client.js

@@ -41,7 +41,7 @@
         API = api;
 
         // wire up animate button in ui
-        api.function.animate = () => {
+        api.event.on("function.animate", (mode) => {
             if (isCamMode && !camStock) {
                 return api.show.alert("animation requires stock to be enabled");
             }
@@ -50,7 +50,7 @@
                     animate();
                 }
             });
-        };
+        });
 
         api.event.on("mode.set", (mode) => {
             isCamMode = mode === 'CAM';

src/mode/fdm/client.js

@@ -102,6 +102,24 @@
               }
         }
 
+        api.event.on("function.animate", (mode) => {
+            if (!isFdmMode) {
+                return;
+            }
+            if (!API.conf.get().controller.danger) {
+                return;
+            }
+            let pct = 0;
+            let int = setInterval(function() {
+                if (pct <= 1) {
+                    api.const.STACKS.setFraction(pct);
+                    pct += 0.05;
+                } else {
+                    api.const.STACKS.setFraction(1);
+                    clearTimeout(int);
+                }
+            }, 50);
+        });
         api.event.on("mode.set", mode => {
             isFdmMode = mode === 'FDM';
             lastMode = mode;