unity 在UI上，任意给定两点，连线

weixin_46094598

已于 2023-06-02 10:37:48 修改

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文章标签： unity ui 游戏引擎

于 2023-06-02 10:34:39 首次发布

本文链接：https://blog.youkuaiyun.com/weixin_46094598/article/details/131002162

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GameObject line = null;
private void DrawLine(RectTransform parent)
{
Vector3 pointAPosition = points[0];
Vector3 pointBPosition = Input.mousePosition;
Vector3 centerPosition = (pointAPosition + pointBPosition) / 2f;

if (line == null)
{
line = Instantiate(Resources.Load<GameObject>("Line"), pointAPosition, Quaternion.identity, parent);
}
RectTransform connectionLine = line.GetComponent<RectTransform>();

//计算长度
float distance = Vector3.Distance(pointAPosition, pointBPosition);
connectionLine.sizeDelta = new Vector2(distance-5, connectionLine.sizeDelta.y);

//计算角度
Vector3 direction = (pointAPosition - pointBPosition).normalized;
float angle = Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg;
connectionLine.rotation = Quaternion.AngleAxis(angle, Vector3.forward);

connectionLine.position = centerPosition;
}