Make kaleido pivot keyframable

src/components/CanvasStage.vue

@@ -561,36 +561,35 @@ function kaleidoIndicesForLayer(layer: Layer): number[] {
 }
 
 /** Augments a layer's Konva config with the kaleido per-copy
- *  position + rotation. Pivot defaults to the layer's own (x, y),
- *  but a per-layer override moves the orbit centre elsewhere on the
- *  canvas — same arithmetic as render.ts/exportPlayer use, so all
- *  three render paths land identical pixels. Non-source copies are
+ *  position + rotation. Pivot lookup matches render.ts: live drag
+ *  override → keyframed `props.kaleidoPivotX/Y` → static layer
+ *  override → layer's own (x, y). Non-source copies are
  *  listening:false to keep events on the source. */
 function withK<T extends Record<string, unknown>>(
   cfg: T,
   layer: Layer,
+  props: AnimatableProps,
   ki: number,
   n: number,
 ): T {
   if (n <= 1 || ki === 0) return cfg
-  const sx = typeof cfg.x === 'number' ? (cfg.x as number) : 0
-  const sy = typeof cfg.y === 'number' ? (cfg.y as number) : 0
-  const srot = typeof cfg.rotation === 'number' ? (cfg.rotation as number) : 0
-  // Live-pivot drag: when the user drags the on-stage handle for
-  // this layer, route through liveKaleidoPivot so the orbit follows
-  // the pointer in real time.
   const live = liveKaleidoPivot.value
-  const pivotX = live && live.instanceId === layer.id ? live.x : (layer.kaleidoPivotX ?? sx)
-  const pivotY = live && live.instanceId === layer.id ? live.y : (layer.kaleidoPivotY ?? sy)
+  const liveOverride = live && live.instanceId === layer.id
+  const pivotX = liveOverride
+    ? live.x
+    : props.kaleidoPivotX ?? layer.kaleidoPivotX ?? props.x
+  const pivotY = liveOverride
+    ? live.y
+    : props.kaleidoPivotY ?? layer.kaleidoPivotY ?? props.y
   const angle = kaleidoAngleDegrees(ki, n)
   const a = (angle * Math.PI) / 180
-  const dx = sx - pivotX
-  const dy = sy - pivotY
+  const dx = props.x - pivotX
+  const dy = props.y - pivotY
   return {
     ...cfg,
     x: pivotX + dx * Math.cos(a) - dy * Math.sin(a),
     y: pivotY + dx * Math.sin(a) + dy * Math.cos(a),
-    rotation: srot + angle,
+    rotation: props.rotation + angle,
     listening: false,
     draggable: false,
   } as T
@@ -1683,8 +1682,14 @@ const kaleidoPivotHandle = computed<KaleidoPivotEntity | null>(() => {
     if (asset?.kind === 'button') return null
     const sampled = sampleLayer(layer, store.playhead)
     const live = liveKaleidoPivot.value
-    const x = live && live.instanceId === lyId ? live.x : (layer.kaleidoPivotX ?? sampled.x)
-    const y = live && live.instanceId === lyId ? live.y : (layer.kaleidoPivotY ?? sampled.y)
+    // Pivot lookup matches render.ts: live drag → keyframed prop →
+    // legacy static layer field → sampled layer position.
+    const x = live && live.instanceId === lyId
+      ? live.x
+      : sampled.kaleidoPivotX ?? layer.kaleidoPivotX ?? sampled.x
+    const y = live && live.instanceId === lyId
+      ? live.y
+      : sampled.kaleidoPivotY ?? layer.kaleidoPivotY ?? sampled.y
     return { kind: 'layer', layerId: layer.id, x, y }
   }
   return null
@@ -1752,9 +1757,11 @@ function onKaleidoPivotPointerUp() {
         kaleidoPivotY: liveKaleidoPivot.value.y,
       })
     } else {
-      store.setLayerKaleidoPivot(pivotDragEntity.layerId, {
-        x: liveKaleidoPivot.value.x,
-        y: liveKaleidoPivot.value.y,
+      // Layer pivot is keyframable. Upsert at the current playhead
+      // so dropping multiple kfs animates the orbit centre.
+      store.upsertKeyframe(pivotDragEntity.layerId, store.playhead, {
+        kaleidoPivotX: liveKaleidoPivot.value.x,
+        kaleidoPivotY: liveKaleidoPivot.value.y,
       })
     }
   }
@@ -4496,7 +4503,7 @@ function onResizeHandlePointerUp(e: PointerEvent) {
                 >
                 <v-group
                   v-if="entry.item.asset.kind === 'svg' && svgAssetFor(entry.item.asset)"
-                  :config="withK(buttonLayerGroupConfig(entry.item.layer, entry.item.props), entry.item.layer, ki, kaleidoCountFor(entry.item.layer))"
+                  :config="withK(buttonLayerGroupConfig(entry.item.layer, entry.item.props), entry.item.layer, entry.item.props, ki, kaleidoCountFor(entry.item.layer))"
                   @dragmove="handleDragMove"
                   @dragend="handleDragEnd"
                   @transform="handleTransform"
@@ -4581,7 +4588,7 @@ function onResizeHandlePointerUp(e: PointerEvent) {
                 </v-group>
                 <v-rect
                   v-else-if="entry.item.asset.kind === 'rect'"
-                  :config="withK(rectConfig(entry.item.layer, entry.item.asset, entry.item.props), entry.item.layer, ki, kaleidoCountFor(entry.item.layer))"
+                  :config="withK(rectConfig(entry.item.layer, entry.item.asset, entry.item.props), entry.item.layer, entry.item.props, ki, kaleidoCountFor(entry.item.layer))"
                   @dragmove="handleDragMove"
                   @dragend="handleDragEnd"
                   @transform="handleTransform"
@@ -4589,7 +4596,7 @@ function onResizeHandlePointerUp(e: PointerEvent) {
                 />
                 <v-circle
                   v-else-if="entry.item.asset.kind === 'circle'"
-                  :config="withK(circleConfig(entry.item.layer, entry.item.asset, entry.item.props), entry.item.layer, ki, kaleidoCountFor(entry.item.layer))"
+                  :config="withK(circleConfig(entry.item.layer, entry.item.asset, entry.item.props), entry.item.layer, entry.item.props, ki, kaleidoCountFor(entry.item.layer))"
                   @dragmove="handleDragMove"
                   @dragend="handleDragEnd"
                   @transform="handleTransform"
@@ -4597,7 +4604,7 @@ function onResizeHandlePointerUp(e: PointerEvent) {
                 />
                 <v-text
                   v-else-if="entry.item.asset.kind === 'text'"
-                  :config="withK(textConfig(entry.item.layer, entry.item.asset, entry.item.props), entry.item.layer, ki, kaleidoCountFor(entry.item.layer))"
+                  :config="withK(textConfig(entry.item.layer, entry.item.asset, entry.item.props), entry.item.layer, entry.item.props, ki, kaleidoCountFor(entry.item.layer))"
                   @dragmove="handleDragMove"
                   @dragend="handleDragEnd"
                   @transform="handleTransform"
@@ -4605,7 +4612,7 @@ function onResizeHandlePointerUp(e: PointerEvent) {
                 />
                 <v-line
                   v-else-if="entry.item.asset.kind === 'polygon'"
-                  :config="withK(polygonConfig(entry.item.layer, entry.item.asset, entry.item.props), entry.item.layer, ki, kaleidoCountFor(entry.item.layer))"
+                  :config="withK(polygonConfig(entry.item.layer, entry.item.asset, entry.item.props), entry.item.layer, entry.item.props, ki, kaleidoCountFor(entry.item.layer))"
                   @dragmove="handleDragMove"
                   @dragend="handleDragEnd"
                   @transform="handleTransform"
@@ -4613,7 +4620,7 @@ function onResizeHandlePointerUp(e: PointerEvent) {
                 />
                 <v-image
                   v-else-if="entry.item.asset.kind === 'image' && imageConfig(entry.item.layer, entry.item.asset, entry.item.props)"
-                  :config="withK(imageConfig(entry.item.layer, entry.item.asset, entry.item.props)!, entry.item.layer, ki, kaleidoCountFor(entry.item.layer))"
+                  :config="withK(imageConfig(entry.item.layer, entry.item.asset, entry.item.props)!, entry.item.layer, entry.item.props, ki, kaleidoCountFor(entry.item.layer))"
                   @dragmove="handleDragMove"
                   @dragend="handleDragEnd"
                   @transform="handleTransform"

src/components/FontPicker.vue

@@ -164,12 +164,15 @@ function isActive(id: string): boolean {
 
         <div v-if="customFonts.length > 0" class="font-popover-section">
           <div class="section-title">Your fonts</div>
-          <button
+          <div
             v-for="f in customFonts"
             :key="f.id"
-            type="button"
-            class="font-option"
+            class="custom-font-row"
             :class="{ active: isActive(f.id) }"
+          >
+            <button
+              type="button"
+              class="font-option custom-font-select"
               role="option"
               :aria-selected="isActive(f.id)"
               @click="pick(f.id)"
@@ -180,6 +183,7 @@ function isActive(id: string): boolean {
                 :style="{ visibility: isActive(f.id) ? 'visible' : 'hidden' }"
               />
               <span class="option-label" :style="{ fontFamily: f.family }">{{ f.label }}</span>
+            </button>
             <button
               type="button"
               class="delete-custom"
@@ -188,7 +192,7 @@ function isActive(id: string): boolean {
             >
               <PhTrash :size="12" />
             </button>
-          </button>
+          </div>
         </div>
 
         <div class="font-popover-divider"></div>
@@ -327,6 +331,38 @@ function isActive(id: string): boolean {
   color: var(--accent);
 }
 
+.font-popover .custom-font-row {
+  display: flex;
+  align-items: center;
+  width: 100%;
+  background: transparent;
+  border: 1px solid transparent;
+  border-radius: var(--radius-sm);
+  color: var(--text);
+}
+
+.font-popover .custom-font-row:hover {
+  background: var(--panel-hover, var(--panel-alt));
+}
+
+.font-popover .custom-font-row.active {
+  background: var(--accent-soft);
+  color: var(--accent);
+}
+
+.font-popover .custom-font-select {
+  flex: 1 1 auto;
+  min-width: 0;
+  border: 0;
+  border-radius: 0;
+  color: inherit;
+  padding: 6px 0 6px 8px;
+}
+
+.font-popover .custom-font-select:hover {
+  background: transparent;
+}
+
 .font-popover .check {
   flex-shrink: 0;
 }
@@ -352,10 +388,12 @@ function isActive(id: string): boolean {
   border-radius: var(--radius-sm);
   color: var(--text-dim);
   cursor: pointer;
+  margin-right: 4px;
   opacity: 0;
 }
 
-.font-popover .font-option:hover .delete-custom {
+.font-popover .custom-font-row:hover .delete-custom,
+.font-popover .delete-custom:focus-visible {
   opacity: 1;
 }
 

src/components/PropertiesPanel.vue

@@ -225,17 +225,25 @@ const kaleidoOn = computed(() => !!selected.value?.kaleido)
 
 const kaleidoCountValue = computed(() => selected.value?.kaleidoCount ?? 6)
 
+/** Display value for the layer's kaleido pivot inputs. Reads the
+ *  sampled keyframe value first (so a moving pivot animates the
+ *  number too), then the layer's static legacy override, then the
+ *  layer's own (x, y). Rounded to int for compact display. */
 const kaleidoPivotX = computed(() => {
   const l = selected.value
   if (!l) return 0
+  const s = sampled.value
+  if (s?.kaleidoPivotX !== undefined) return Math.round(s.kaleidoPivotX)
   if (l.kaleidoPivotX !== undefined) return Math.round(l.kaleidoPivotX)
-  return Math.round(sampled.value?.x ?? 0)
+  return Math.round(s?.x ?? 0)
 })
 const kaleidoPivotY = computed(() => {
   const l = selected.value
   if (!l) return 0
+  const s = sampled.value
+  if (s?.kaleidoPivotY !== undefined) return Math.round(s.kaleidoPivotY)
   if (l.kaleidoPivotY !== undefined) return Math.round(l.kaleidoPivotY)
-  return Math.round(sampled.value?.y ?? 0)
+  return Math.round(s?.y ?? 0)
 })
 
 function setKaleidoOn(on: boolean) {
@@ -243,9 +251,15 @@ function setKaleidoOn(on: boolean) {
   store.setLayerKaleido(selected.value.id, on)
 }
 
+/** Pivot writes go through the keyframe pipeline — same flow as
+ *  Transform X/Y. Animators can drop multiple kfs and the orbit
+ *  centre interpolates between them. */
 function setKaleidoPivot(patch: { x?: number; y?: number }) {
   if (!selected.value) return
-  store.setLayerKaleidoPivot(selected.value.id, patch)
+  const props: Partial<import('@/types/scene').AnimatableProps> = {}
+  if (patch.x !== undefined) props.kaleidoPivotX = patch.x
+  if (patch.y !== undefined) props.kaleidoPivotY = patch.y
+  store.upsertKeyframe(selected.value.id, store.playhead, props)
 }
 
 const wiggleOn = computed(() => !!selected.value?.wiggle)

src/devtools/tests.ts

@@ -15554,7 +15554,7 @@ export function registerAllTests(): void {
       expect(src).toContain('clipKaleidoPivot')
       expect(src).toContain('clipArmLocalT')
       // Runtime version got bumped during the kaleido + wiggle work.
-      expect(src).toContain("'33'")
+      expect(src).toContain("'34'")
     })
 
     test('exported runtime layerActiveAt is unaffected by kaleido fields', async () => {
@@ -15932,7 +15932,7 @@ export function registerAllTests(): void {
       expect(src).toContain('function wiggleSeeds(')
       // Runtime version got bumped through the wiggle work and the
       // later layer-kaleido-pivot landing.
-      expect(src).toContain("'33'")
+      expect(src).toContain("'34'")
     })
   })
 
@@ -16207,24 +16207,39 @@ export function registerAllTests(): void {
   suite('layer kaleido pivot — separate orbit centre', () => {
     test('layerArmTransform: defaults to sampled position, custom pivot rotates around override', async () => {
       const { layerArmTransform } = await import('@/lib/kaleido')
+      const baseProps = (x: number, y: number, rot = 0) => ({
+        x, y, rotation: rot, scaleX: 1, scaleY: 1, opacity: 1,
+      }) as unknown as import('@/types/scene').AnimatableProps
       // Layer at (100, 100), no custom pivot → arm 1 of 4 rotates
       // 90° around (100, 100): same result as no-pivot baseline.
       const layer = { id: 'L', kaleido: true, kaleidoCount: 4 } as unknown as import('@/types/scene').Layer
-      const a = layerArmTransform(layer, 100, 100, 0, 1, 4)
+      const a = layerArmTransform(layer, baseProps(100, 100), 1, 4)
       // dx=dy=0 → arm 1 stays at pivot.
       expect(a.x).toBeCloseTo(100, 5)
       expect(a.y).toBeCloseTo(100, 5)
       expect(a.rotation).toBeCloseTo(90, 5)
-      // Custom pivot at (50, 50) shifts the orbit centre. Layer at
-      // (100, 100), arm 1 of 4 (90°) around (50, 50):
-      //   dx=50, dy=50 → rotated by 90° → dx'=-50, dy'=50 → world (0, 100)
+      // Static legacy override at (50, 50): same rotation, layer at
+      // (100, 100). Arm 1 (90°): dx=50, dy=50 → after R(90°): (-50, 50)
+      // → world (0, 100).
       const layerWithPivot = {
         id: 'L', kaleido: true, kaleidoCount: 4, kaleidoPivotX: 50, kaleidoPivotY: 50,
       } as unknown as import('@/types/scene').Layer
-      const b = layerArmTransform(layerWithPivot, 100, 100, 0, 1, 4)
+      const b = layerArmTransform(layerWithPivot, baseProps(100, 100), 1, 4)
       expect(b.x).toBeCloseTo(0, 5)
       expect(b.y).toBeCloseTo(100, 5)
       expect(b.rotation).toBeCloseTo(90, 5)
+      // Keyframed pivot via props takes precedence over the legacy
+      // layer-level override. Pivot via props (200, 200), layer
+      // override (50, 50) — props wins. dx=−100, dy=−100 → R(90°): (100, −100)
+      // → world (300, 100).
+      const c = layerArmTransform(
+        layerWithPivot,
+        { ...baseProps(100, 100), kaleidoPivotX: 200, kaleidoPivotY: 200 } as import('@/types/scene').AnimatableProps,
+        1,
+        4,
+      )
+      expect(c.x).toBeCloseTo(300, 5)
+      expect(c.y).toBeCloseTo(100, 5)
     })
 
     test('store.setLayerKaleidoPivot: patch + null clear', () => {
@@ -16322,14 +16337,20 @@ export function registerAllTests(): void {
         expect(pivotInputs.length).toBe(2)
         expect(Number(pivotInputs[0].value)).toBe(50)
         expect(Number(pivotInputs[1].value)).toBe(50)
-        // Type a new pivot X via @input.
+        // Type a new pivot X via @input — pivot writes go through the
+        // keyframe pipeline now (same path as Transform X/Y).
         pivotInputs[0].value = '120'
         pivotInputs[0].dispatchEvent(new Event('input'))
         await nextTick()
         const stored = s.scene.layers.find((l) => l.id === layer.id)!
-        expect(stored.kaleidoPivotX).toBe(120)
-        // Y stays at the sampled default until the user touches it.
-        expect(stored.kaleidoPivotY === undefined).toBe(true)
+        // Find the upserted keyframe at the playhead.
+        const kf = stored.keyframes.find((k) => Math.abs(k.time - s.playhead) < 1e-3)
+        expect(!!kf).toBe(true)
+        expect(kf!.props.kaleidoPivotX).toBe(120)
+        // Y stays unset on the kf since the user only touched X.
+        expect(kf!.props.kaleidoPivotY === undefined).toBe(true)
+        // The legacy top-level field is untouched (still undefined).
+        expect(stored.kaleidoPivotX === undefined).toBe(true)
       } finally {
         handle.unmount()
       }
@@ -16361,11 +16382,89 @@ export function registerAllTests(): void {
       }
     })
 
+    test('layer kaleido pivot interpolates between keyframes', async () => {
+      // Keyframe pivot at (0, 0) at t=0 and (200, 200) at t=1.
+      // At t=0.5 the sampled pivot should land at (100, 100). Verify
+      // by checking arm 1 (90° of 4) of a layer at world (50, 50):
+      //   dx=50-100=-50, dy=50-100=-50 → R(90°): dx'=50, dy'=-50
+      //   → world (150, 50).
+      const { sampleLayer } = await import('@/lib/interpolate')
+      const { layerArmTransform } = await import('@/lib/kaleido')
+      const layer = {
+        id: 'L',
+        name: 'L',
+        assetId: 'a',
+        visible: true,
+        base: { x: 50, y: 50, scaleX: 1, scaleY: 1, rotation: 0, opacity: 1 },
+        keyframes: [
+          {
+            id: 'k1', time: 0, easing: 'linear',
+            props: { x: 50, y: 50, scaleX: 1, scaleY: 1, rotation: 0, opacity: 1, kaleidoPivotX: 0, kaleidoPivotY: 0 },
+          },
+          {
+            id: 'k2', time: 1, easing: 'linear',
+            props: { x: 50, y: 50, scaleX: 1, scaleY: 1, rotation: 0, opacity: 1, kaleidoPivotX: 200, kaleidoPivotY: 200 },
+          },
+        ],
+        kaleido: true,
+        kaleidoCount: 4,
+      } as unknown as import('@/types/scene').Layer
+      const props = sampleLayer(layer, 0.5)
+      expect(props.kaleidoPivotX).toBeCloseTo(100, 5)
+      expect(props.kaleidoPivotY).toBeCloseTo(100, 5)
+      const tf = layerArmTransform(layer, props, 1, 4)
+      expect(tf.x).toBeCloseTo(150, 5)
+      expect(tf.y).toBeCloseTo(50, 5)
+    })
+
+    test('layer kaleido pivot: one-sided override lerps from layer position, not snap', async () => {
+      // Regression: when only ONE of two adjacent keyframes sets
+      // kaleidoPivotX/Y, the older lerp logic snapped the entire
+      // interval to the defined value (because optional props
+      // default to "carry through"). Pivot should instead lerp from
+      // the layer's own (x, y) on the unset side to the explicit
+      // value on the other — so adding a single late kf produces a
+      // smooth orbit-centre transition, not an instant jump.
+      const { sampleLayer } = await import('@/lib/interpolate')
+      const layer = {
+        id: 'L',
+        name: 'L',
+        assetId: 'a',
+        visible: true,
+        base: { x: 50, y: 50, scaleX: 1, scaleY: 1, rotation: 0, opacity: 1 },
+        keyframes: [
+          {
+            id: 'k1', time: 0, easing: 'linear',
+            // No kaleidoPivotX/Y — layer's own (50, 50) is the implicit start.
+            props: { x: 50, y: 50, scaleX: 1, scaleY: 1, rotation: 0, opacity: 1 },
+          },
+          {
+            id: 'k2', time: 1, easing: 'linear',
+            props: { x: 50, y: 50, scaleX: 1, scaleY: 1, rotation: 0, opacity: 1, kaleidoPivotX: 250, kaleidoPivotY: 250 },
+          },
+        ],
+        kaleido: true,
+        kaleidoCount: 4,
+      } as unknown as import('@/types/scene').Layer
+      // At t=0 → pivot starts at the layer's own position (50, 50).
+      const start = sampleLayer(layer, 0)
+      expect(start.kaleidoPivotX).toBeCloseTo(50, 5)
+      expect(start.kaleidoPivotY).toBeCloseTo(50, 5)
+      // At t=0.5 → halfway between (50, 50) and (250, 250) = (150, 150).
+      const mid = sampleLayer(layer, 0.5)
+      expect(mid.kaleidoPivotX).toBeCloseTo(150, 5)
+      expect(mid.kaleidoPivotY).toBeCloseTo(150, 5)
+      // At t=1 → fully at the explicit kf2 value.
+      const end = sampleLayer(layer, 1)
+      expect(end.kaleidoPivotX).toBeCloseTo(250, 5)
+      expect(end.kaleidoPivotY).toBeCloseTo(250, 5)
+    })
+
     test('exported runtime engine carries layerArmTf helper', () => {
       const src = generateRuntimeScript()
       expect(src).toContain('function layerArmTf(')
       // Bumped on this work.
-      expect(src).toContain("'33'")
+      expect(src).toContain("'34'")
     })
   })
 }

src/lib/exportPlayer.ts

@@ -11,7 +11,7 @@ function isProject(p: ExportPayload): p is Project {
   return Array.isArray((p as Partial<Project>).scenes)
 }
 
-const RUNTIME_VERSION = '33'
+const RUNTIME_VERSION = '34'
 
 /** Materialize the engine source. The font map is rebuilt on every
  *  call so user-uploaded custom fonts (which live in localStorage
@@ -107,6 +107,17 @@ const ENGINE_TEMPLATE = `(function(){
     if(a.shadowColor && b.shadowColor) out.shadowColor=lerpColor(a.shadowColor,b.shadowColor,t);
     else if(b.shadowColor) out.shadowColor=b.shadowColor;
     else if(a.shadowColor) out.shadowColor=a.shadowColor;
+    // Kaleido pivot: mirror src/lib/interpolate.ts. A one-sided
+    // override lerps from the layer's own (x, y) on the unset side
+    // to the explicit value on the other.
+    var apx=a.kaleidoPivotX, bpx=b.kaleidoPivotX;
+    if(apx!=null || bpx!=null){
+      out.kaleidoPivotX = lerp(apx!=null?apx:a.x, bpx!=null?bpx:b.x, t);
+    }
+    var apy=a.kaleidoPivotY, bpy=b.kaleidoPivotY;
+    if(apy!=null || bpy!=null){
+      out.kaleidoPivotY = lerp(apy!=null?apy:a.y, bpy!=null?bpy:b.y, t);
+    }
     return out;
   }
   // Interpolate a single keyframe track against 'base' at 'time'.
@@ -736,20 +747,24 @@ const ENGINE_TEMPLATE = `(function(){
       return n<2?1:n;
     }
     function kalAngle(i,n){ return n<=1?0:(i*360)/n; }
-    // Mirror of layerArmTransform in src/lib/kaleido.ts. Defaults the
-    // pivot to the layer's sampled (x, y); a per-layer override can
-    // shift it elsewhere on the canvas.
-    function layerArmTf(layer, sx, sy, srot, i, n){
-      if(i===0||n<=1) return {x:sx,y:sy,rotation:srot};
-      var px=(layer.kaleidoPivotX==null?sx:layer.kaleidoPivotX);
-      var py=(layer.kaleidoPivotY==null?sy:layer.kaleidoPivotY);
+    // Mirror of layerArmTransform in src/lib/kaleido.ts. Pivot lookup:
+    // sampled props (keyframed) → layer's static legacy override →
+    // layer's own sampled (x, y).
+    function layerArmTf(layer, props, i, n){
+      if(i===0||n<=1) return {x:props.x,y:props.y,rotation:props.rotation};
+      var ppx=(props.kaleidoPivotX==null?null:props.kaleidoPivotX);
+      var ppy=(props.kaleidoPivotY==null?null:props.kaleidoPivotY);
+      var lpx=(layer.kaleidoPivotX==null?null:layer.kaleidoPivotX);
+      var lpy=(layer.kaleidoPivotY==null?null:layer.kaleidoPivotY);
+      var px=(ppx!=null?ppx:(lpx!=null?lpx:props.x));
+      var py=(ppy!=null?ppy:(lpy!=null?lpy:props.y));
       var ang=kalAngle(i,n);
       var a=ang*Math.PI/180;
-      var dx=sx-px, dy=sy-py;
+      var dx=props.x-px, dy=props.y-py;
       return {
         x: px+dx*Math.cos(a)-dy*Math.sin(a),
         y: py+dx*Math.sin(a)+dy*Math.cos(a),
-        rotation: srot+ang
+        rotation: props.rotation+ang
       };
     }
     function clipKaleidoPivot(inst){
@@ -833,7 +848,7 @@ const ENGINE_TEMPLATE = `(function(){
       var p=sample(layer,time);
       var kn=kalCount(layer);
       for(var ki=0;ki<kn;ki++){
-        var tfm=layerArmTf(layer, p.x, p.y, p.rotation, ki, kn);
+        var tfm=layerArmTf(layer, p, ki, kn);
         ctxm.save();
         ctxm.translate(tfm.x,tfm.y);
         ctxm.rotate(tfm.rotation*Math.PI/180);
@@ -932,7 +947,7 @@ const ENGINE_TEMPLATE = `(function(){
       // areas would break click routing.
       var kn=(asset.kind==='button')?1:kalCount(layer);
       for(var ki=0;ki<kn;ki++){
-      var tfL=layerArmTf(layer, p.x, p.y, p.rotation, ki, kn);
+      var tfL=layerArmTf(layer, p, ki, kn);
       ctx.save();
       ctx.globalAlpha=ctx.globalAlpha*p.opacity;
       ctx.translate(tfL.x,tfL.y);

src/lib/interpolate.ts

@@ -69,6 +69,22 @@ export function lerpProps(a: AnimatableProps, b: AnimatableProps, t: number): An
   if (a.strokeWidth !== undefined && b.strokeWidth !== undefined) out.strokeWidth = lerp(a.strokeWidth, b.strokeWidth, t)
   else if (b.strokeWidth !== undefined) out.strokeWidth = b.strokeWidth
   else if (a.strokeWidth !== undefined) out.strokeWidth = a.strokeWidth
+  // Kaleido pivot defaults to the layer's own (x, y) when unset on a
+  // keyframe — so a one-sided override (only b has kaleidoPivotX, a
+  // doesn't) lerps from a.x → b.kaleidoPivotX instead of snapping to
+  // b's value at t=0+. Same on the reverse direction.
+  {
+    const ax = a.kaleidoPivotX
+    const bx = b.kaleidoPivotX
+    if (ax !== undefined || bx !== undefined) {
+      out.kaleidoPivotX = lerp(ax ?? a.x, bx ?? b.x, t)
+    }
+    const ay = a.kaleidoPivotY
+    const by = b.kaleidoPivotY
+    if (ay !== undefined || by !== undefined) {
+      out.kaleidoPivotY = lerp(ay ?? a.y, by ?? b.y, t)
+    }
+  }
   if (a.points && b.points && a.points.length === b.points.length) {
     out.points = a.points.map((pa, i) => {
       const pb = b.points![i]

src/lib/kaleido.ts

@@ -4,7 +4,7 @@
 // (lib/exportPlayer.ts engine source — by mirroring the formulas in
 // JS) all derive identical geometry from the same definitions.
 
-import type { Layer, ClipInstance } from '@/types/scene'
+import type { AnimatableProps, Layer, ClipInstance } from '@/types/scene'
 
 /** Number of radial copies to render. Returns 1 when kaleido is off
  *  or the count is below the floor — the caller should treat 1 as
@@ -107,42 +107,45 @@ export function layerKaleidoCount(layer: Layer): number {
   return kaleidoCountFor(layer)
 }
 
-/** Effective pivot for a layer. Defaults to the layer's sampled
- *  position; an explicit `kaleidoPivotX/Y` overrides per-axis. */
+/** Effective pivot for a layer. Lookup chain:
+ *    1. `props.kaleidoPivotX/Y` — keyframed value (lets the pivot
+ *       animate)
+ *    2. `Layer.kaleidoPivotX/Y` — legacy static override (kept for
+ *       back-compat with projects saved before the feature went
+ *       keyframable)
+ *    3. layer's sampled (x, y) — default
+ */
 export function layerKaleidoPivot(
   layer: Layer,
-  sampledX: number,
-  sampledY: number,
+  props: AnimatableProps,
 ): { x: number; y: number } {
   return {
-    x: layer.kaleidoPivotX ?? sampledX,
-    y: layer.kaleidoPivotY ?? sampledY,
+    x: props.kaleidoPivotX ?? layer.kaleidoPivotX ?? props.x,
+    y: props.kaleidoPivotY ?? layer.kaleidoPivotY ?? props.y,
   }
 }
 
 /** World-space (x, y, rotation) for arm `index` of a kaleido'd
- *  layer. The source (index 0) is unchanged. Higher indices
- *  rotate around the pivot — both their position AND their
- *  orientation, since layer kaleido always rotates copies. */
+ *  layer. The source (index 0) is unchanged. Higher indices rotate
+ *  around the pivot — both their position AND their orientation,
+ *  since layer kaleido always rotates copies. */
 export function layerArmTransform(
   layer: Layer,
-  sampledX: number,
-  sampledY: number,
-  sampledRotation: number,
+  props: AnimatableProps,
   index: number,
   count: number,
 ): { x: number; y: number; rotation: number } {
   if (index === 0 || count <= 1) {
-    return { x: sampledX, y: sampledY, rotation: sampledRotation }
+    return { x: props.x, y: props.y, rotation: props.rotation }
   }
-  const { x: px, y: py } = layerKaleidoPivot(layer, sampledX, sampledY)
+  const { x: px, y: py } = layerKaleidoPivot(layer, props)
   const angle = kaleidoAngleDegrees(index, count)
   const a = (angle * Math.PI) / 180
-  const dx = sampledX - px
-  const dy = sampledY - py
+  const dx = props.x - px
+  const dy = props.y - py
   return {
     x: px + dx * Math.cos(a) - dy * Math.sin(a),
     y: py + dx * Math.sin(a) + dy * Math.cos(a),
-    rotation: sampledRotation + angle,
+    rotation: props.rotation + angle,
   }
 }

src/lib/render.ts

@@ -164,7 +164,7 @@ function drawLayers(
     // their own internal layers and click routing must stay 1:1).
     const kCount = asset.kind === 'button' ? 1 : layerKaleidoCount(layer)
     for (let kf = 0; kf < kCount; kf++) {
-      const tf = layerArmTransform(layer, p.x, p.y, p.rotation, kf, kCount)
+      const tf = layerArmTransform(layer, p, kf, kCount)
       ctx.save()
       ctx.globalAlpha *= p.opacity
       ctx.translate(tf.x, tf.y)
@@ -361,7 +361,7 @@ function drawMaskShape(
   // N rotated shapes.
   const kCount = layerKaleidoCount(layer)
   for (let kf = 0; kf < kCount; kf++) {
-    const tf = layerArmTransform(layer, p.x, p.y, p.rotation, kf, kCount)
+    const tf = layerArmTransform(layer, p, kf, kCount)
     ctx.save()
     ctx.translate(tf.x, tf.y)
     ctx.rotate((tf.rotation * Math.PI) / 180)

src/types/scene.ts

@@ -29,6 +29,12 @@ export interface AnimatableProps {
   points?: Point[]
   stroke?: string
   strokeWidth?: number
+  /** Kaleidoscope pivot — keyframable like x/y. When unset on every
+   *  reachable kf, falls back to the layer's static
+   *  `Layer.kaleidoPivotX/Y` (legacy field), then to (x, y). Lets the
+   *  pivot itself dance through the scene. */
+  kaleidoPivotX?: number
+  kaleidoPivotY?: number
 }
 
 export interface Keyframe {