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// rect定义矩形，center为圆心，radius为半径
bool CheckIntersection(Rect rect, Vector center, float radius) {
	var dx = MathS.Clamp(center.x, rect.minX, rect.maxX) - center.x;
	var dy = MathS.Clamp(center.y, rect.minY, rect.maxY) - center.y;
	var rr = radius * radius;
	return dx * dx + dy * dy <= rr;
}