优化ptz

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2024-02-29 454b5a4b87b5c2ffe34f67a53797d6aeb7941995

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// Bit masks to check which parts of element needs to be updated.
export const REDRAW_BIT = 1;
export const STYLE_CHANGED_BIT = 2;
export const SHAPE_CHANGED_BIT = 4;