not sure

src/game-loop/pointer-input.test.ts

@@ -252,6 +252,31 @@ describe('GardenPointerInput drawing startup', () => {
     expect(brushPipeline.addSwipeSegment.mock.calls.length).toBeGreaterThan(3);
   });
 
+  it('passes normalized audio geometry context with stroke events', async () => {
+    const { audio, canvas } = await createPointerInput();
+
+    canvas.dispatchPointerEvent('pointerdown', { pointerId: 9, timeStamp: 100 });
+    canvas.dispatchPointerEvent('pointermove', {
+      clientX: 40,
+      clientY: 50,
+      pointerId: 9,
+      timeStamp: 150,
+    });
+
+    expect(audio.stroke).toHaveBeenCalledWith(
+      expect.objectContaining({
+        canvasSize: [300, 200],
+        elapsedSeconds: 0.05,
+        from: expect.anything(),
+        isErasing: false,
+        to: expect.anything(),
+      })
+    );
+    const stroke = audio.stroke.mock.calls[0][0];
+    expect(toPoint(stroke.from)).toEqual([10, 20]);
+    expect(toPoint(stroke.to)).toEqual([40, 50]);
+  });
+
   it('caps curve tessellation with the brush curve resolution setting', async () => {
     const { brushPipeline, canvas, runtimeSettings } = await createPointerInput();
     runtimeSettings.brushCurveResolution = 2;