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https://github.com/zhw2590582/ArtPlayer.git
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17 lines
516 B
TypeScript
17 lines
516 B
TypeScript
export function slideDirection(startX: number, startY: number, endX: number, endY: number): 0 | 1 | 2 | 3 | 4 {
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const dy = startY - endY
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const dx = endX - startX
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if (Math.abs(dx) < 2 && Math.abs(dy) < 2)
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return 0
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const angle = Math.atan2(dy, dx) * 180 / Math.PI
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if (angle >= -45 && angle < 45)
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return 4
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if (angle >= 45 && angle < 135)
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return 1
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if (angle >= -135 && angle < -45)
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return 2
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if ((angle >= 135 && angle <= 180) || (angle >= -180 && angle < -135))
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return 3
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return 0
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}
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