Perf: block hit tests while moving camera

[steveruizok]

This PR uses an element that prevents hit tests on shapes while the camera is moving.

Kapture.2024-04-09.at.14.32.53.mp4

Change Type

• sdk — Changes the tldraw SDK
• improvement — Improving existing features

Test Plan

1. Move the camera.
2. Interact with the canvas.
3. Zoom in and out.

Release Notes

• Improves performance of canvas while the camera is moving.

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[mimecuvalo]

so good

[ds300]

@steveruizok instead of this could we just put the following line at the top of getShapeAtPoint ?

if (this.getCameraState() !== 'idle') return

[steveruizok]

No this one addresses the browser's own hitTest function, which takes time as number of elements on the screen goes up.

[MitjaBezensek]

Nice!

Not sure if the feature flag changes are leftovers from testing or if you wanted to commit them?