diff --git a/src/kiri-mode/cam/animate.js b/src/kiri-mode/cam/animate.js
index 5d9b6863..ec2f496a 100644
--- a/src/kiri-mode/cam/animate.js
+++ b/src/kiri-mode/cam/animate.js
@@ -224,9 +224,9 @@ kiri.load(() => {
     }
 
     function replay() {
-        CAM.animate_clear(api);
+        animate_clear(api);
         setTimeout(() => {
-            CAM.animate(api, 50);
+            animate(api, 50);
         }, 250);
     }
 
@@ -554,31 +554,6 @@ kiri.load(() => {
         send.data({ mesh_add: { id:++toolID, ind, sab }});
     }
 
-    // load renderer code in worker context only
-    if (kiri.worker && false)
-    fetch('/wasm/kiri-ani.wasm')
-        .then(response => response.arrayBuffer())
-        .then(bytes => WebAssembly.instantiate(bytes, {
-            env: {
-                reportf: (a,b) => { console.log('[f]',a,b) },
-                reporti: (a,b) => { console.log('[i]',a,b) }
-            }
-        }))
-        .then(results => {
-            let {module, instance} = results;
-            let {exports} = instance;
-            let heap = new Uint8Array(exports.memory.buffer);
-            let wasm = self.wasm = {
-                heap,
-                memory: exports.memory,
-                updateMesh: exports.updateMesh
-            };
-            // heap[0] = 5;
-            // heap[100] = 6;
-            // heap[200] = 8;
-            // let rv = self.wasm.updateMesh(0, 0, 100, 200);
-        });
-
 });
 
 });
diff --git a/src/kiri-mode/cam/animate2.js b/src/kiri-mode/cam/animate2.js
index 61b15b2a..f0ec2c57 100644
--- a/src/kiri-mode/cam/animate2.js
+++ b/src/kiri-mode/cam/animate2.js
@@ -194,7 +194,15 @@ kiri.load(() => {
                 mesh.position.x = pos.x;
                 mesh.position.y = pos.y;
                 mesh.position.z = pos.z;
-                space.update();
+                space.refresh();
+            }
+        }
+        if (data.mesh_index) {
+            const { id, index } = data.mesh_index;
+            const mesh = meshes[id];
+            if (mesh) {
+                mesh.rotation.x = (Math.PI / 180) * index;
+                space.refresh();
             }
         }
         if (data.mesh_update) {
@@ -217,9 +225,9 @@ kiri.load(() => {
     }
 
     function replay() {
-        CAM.animate_clear2(api);
+        animate_clear2(api);
         setTimeout(() => {
-            CAM.animate2(api, 50);
+            animate2(api, 50);
         }, 250);
     }
 });
@@ -330,7 +338,9 @@ kiri.load(() => {
     let stock, center, rez;
     let path, pathIndex, tool, tools, last;
 
+    let stockIndexMsg = false;
     let stockSlices;
+    let stockIndex;
     let startTime;
 
     let toolID = -1;
@@ -372,6 +382,7 @@ kiri.load(() => {
         last = null;
         animating = false;
         animateClear = false;
+        stockIndex = 0;
         indexCount = 0;
         startTime = 0;
         updates = 0;
@@ -542,9 +553,6 @@ kiri.load(() => {
 
     // send latest tool position and progress bar
     function renderUpdate(send) {
-        if (toolUpdateMsg) {
-            send.data(toolUpdateMsg);
-        }
         const updated = []
         for (let slice of stockSlices) {
             slice.updateMesh(updated);
@@ -552,6 +560,15 @@ kiri.load(() => {
         for (let slice of updated) {
             slice.send(send);
         }
+        if (toolUpdateMsg) {
+            send.data(toolUpdateMsg);
+        }
+        if (stockIndexMsg) {
+            for (let slice of stockSlices) {
+                send.data({ mesh_index: { id: slice.id, index: -stockIndex } });
+            }
+            stockIndexMsg = false;
+        }
         send.data({ progress: pathIndex / path.length });
         updates++;
     }
@@ -561,10 +578,19 @@ kiri.load(() => {
         const lpos = tool.pos || { x:0, y:0, z:0 };
         tool.pos = pos;
         toolUpdateMsg = { mesh_move: { id: toolID, pos }};
-        const delta = [ pos.x - lpos.x, pos.y - lpos.y, pos.z - lpos.z ];
-        const oldmesh = toolMesh.mesh;
-        toolMesh.mesh = toolMesh.mesh.translate(pos.x - lpos.x, pos.y - lpos.y, pos.z - lpos.z);
-        oldmesh.delete();
+        if (toolMesh.mesh) {
+            toolMesh.mesh.delete();
+        }
+        toolMesh.mesh = toolMesh.root.translate(pos.x, pos.y, pos.z);
+        if (pos.a !== undefined) {
+            let tmp = toolMesh.mesh.rotate([ pos.a, 0, 0 ]);
+            toolMesh.mesh.delete();
+            toolMesh.mesh = tmp;
+            if (pos.a !== stockIndex) {
+                stockIndexMsg = true;
+                stockIndex = pos.a;
+            }
+        }
     }
 
     // delete old tool mesh, generate tool mesh, send to client
@@ -590,7 +616,7 @@ kiri.load(() => {
         }
         mesh = mesh.translate(0, 0, (flen + slen) / 2);
         const { vertex, index } = mesh.getMesh({ normal: () => undefined });
-        toolMesh = { mesh, index, vertex };
+        toolMesh = { root: mesh, index, vertex };
         send.data({ mesh_add: { id:--toolID, ind: index, pos: vertex }});
     }
 
diff --git a/src/kiri-mode/cam/client.js b/src/kiri-mode/cam/client.js
index 466e39e0..2e4ac8f7 100644
--- a/src/kiri-mode/cam/client.js
+++ b/src/kiri-mode/cam/client.js
@@ -19,27 +19,28 @@ let isAnimate,
     camStock,
     camZBottom,
     current,
+    flipping,
     poppedRec,
     hoveredOp,
     API, FDM, SPACE, STACKS, MODES, VIEWS, UI, UC, LANG, MCAM;
 
 let zaxis = { x: 0, y: 0, z: 1 },
     popOp = {},
+    animVer = 1,
     seed = Date.now(),
     func = {
         hover: noop,
         hoverUp: noop
-    },
-    flipping;
+    };
 
-function animFn(v) {
+function animFn() {
     return [{
         animate: CAM.animate,
         animate_clear: CAM.animate_clear
     },{
         animate: CAM.animate2,
         animate_clear: CAM.animate_clear2
-    }][0];
+    }][animVer];
 }
 
 CAM.restoreTabs = restoreTabs;
@@ -79,7 +80,7 @@ CAM.init = function(kiri, api) {
 
     api.event.on("function.export", (mode) => {
         if (isAnimate) {
-            animFn(0).animate_clear(api);
+            animFn().animate_clear(api);
             isAnimate = false;
         }
     });
@@ -102,7 +103,7 @@ CAM.init = function(kiri, api) {
     api.event.on("view.set", (mode) => {
         isArrange = (mode === VIEWS.ARRANGE);
         isAnimate = false;
-        animFn(0).animate_clear(api);
+        animFn().animate_clear(api);
         func.clearPops();
         $('camops').style.display = isCamMode && isArrange ? 'flex' : '';
     });
@@ -1527,7 +1528,7 @@ function animate() {
     API.widgets.opacity(isParsed ? 0 : 0.75);
     API.hide.slider();
     STACKS.clear();
-    animFn(0).animate(API);
+    animFn().animate(API);
 }
 
 function updateStock(args, event) {