using UnityEngine;
public class SelectionBox : MonoBehaviour
{
private Vector2 startPos;
private Vector2 endPos;
private bool isDragging = false;
//边界的宽度
public float thickness = 5;
//区域颜色、边界颜色
public Color areaColor = Color.white, borderColor = Color.white;
Rect GetScreenRect(Vector2 start, Vector2 end)
{
// 确保矩形是从左上到右下
float x = Mathf.Min(start.x, end.x), y = Mathf.Max(start.y, end.y);
float width = Mathf.Abs(start.x - end.x), height = Mathf.Abs(start.y - end.y);
return new Rect(x, Screen.height - y, width, height);
}
// 绘制矩形
void DrawScreenRect(Rect rect, Color color)
{
GUI.color = color;
GUI.DrawTexture(rect, Texture2D.whiteTexture);
GUI.color = Color.white;
}
// 绘制矩形边框
void DrawScreenRectBorder(Rect rect, float thickness, Color color)
{
GUI.color = color;
GUI.DrawTexture(new Rect(rect.x, rect.y, rect.width, thickness), Texture2D.whiteTexture); // 上
GUI.DrawTexture(new Rect(rect.x, rect.yMax - thickness, rect.width, thickness), Texture2D.whiteTexture); // 下
GUI.DrawTexture(new Rect(rect.x, rect.y, thickness, rect.height), Texture2D.whiteTexture); // 左
GUI.DrawTexture(new Rect(rect.xMax - thickness, rect.y, thickness, rect.height), Texture2D.whiteTexture); // 右
GUI.color = Color.white;
}
public Transform target;
// 获取框选区域内的单位
void SelectUnits()
{
Rect selectionRect = GetScreenRect(startPos, endPos);
Transform target = this.target;
if (target != null)
{
Vector2 screenPos = Camera.main.WorldToScreenPoint(target.position);
target.GetChild(0).gameObject.SetActive(selectionRect.Contains(screenPos));
if (selectionRect.Contains(screenPos))
{
//在区域内
}
else
{
//不在区域内
}
}
}
void OnGUI()
{
if (isDragging)
{
Rect rect = GetScreenRect(startPos, endPos);
DrawScreenRect(rect, areaColor);
DrawScreenRectBorder(rect, thickness, borderColor);
}
}
void Update()
{
// 开始拖拽
if (Input.GetMouseButtonDown(0))
{
startPos = Input.mousePosition;
Debug.Log(startPos);
isDragging = true;
target.GetChild(0).gameObject.SetActive(false);
}
// 结束拖拽
else if (Input.GetMouseButtonUp(0))
{
isDragging = false;
SelectUnits();
}
// 更新当前鼠标位置
if (isDragging)
{
endPos = Input.mousePosition;
}
}
}
Unity选择框(魔兽争霸3)
Jo.H2025-03-28 10:42
相关推荐
Clank的游戏栈1 小时前
Unity多线程渲染指令队列设计与集成技术详解胜天半子_王二_王半仙9 小时前
godot源码编译Thomas_YXQ9 小时前
Unity3D IK解算器技术分析Tandy12356_10 小时前
Godot开发2D冒险游戏——第二节:主角光环整起来!星火撩猿17 小时前
常见游戏引擎介绍与对比sky_smile_Allen18 小时前
[Unity]-[UI]-[Prefab] 关于Unity UGUI 的布局及组件讲解虾球xz20 小时前
游戏引擎学习第244天: 完成异步纹理下载太妃糖耶1 天前
URP-利用矩阵在Shader中实现物体的平移和缩放Magnum Lehar1 天前
ApophisZerg游戏引擎项目目录展示Tandy12356_1 天前
Godot开发2D冒险游戏——第一节:主角登场!