从10月20号到现在，Unity3D也学了10天了，对于Unity3D也有了一个大致的了解，有必要做一个小游戏来检测一下自己的学习成果了。经过两天的努力，终于总算是做出来了一个可以玩的坦克大战了。首先讲讲我的设计目标：
1.地图编辑器 2.道具系统 3.简单AI系统 4.计分器
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地图编辑器
我的想法是在编辑器中编辑好地图后，直接打开游戏就可以玩。这样的话，就需要一个文件来存储这些地图元素。鉴于xml在C#上支持非常好，简单易用，就选它了。
然后我们规定一下地图的格式，首先地图是由一个一个item组成的，原版的item有普通的墙，坚固的墙，水和草丛（德玛西亚）。为了方便读取，就用一个名字来规定他们，其次，由于我们是2D的场景，所以存入的坐标是x与y。最后得到的数据存储格式如下：
<item>
<name>gras</name>
<position_x>-1.2</position_x>
<position_y>-3</position_y>
</item><data>
<items>
<item>
<name>gras</name>
<position_x>-1.2</position_x>
<position_y>-3</position_y>
</item>
</items>
</data> bool SaveInXml()
{
if (File.Exists(m_sXmlPath))
{
File.Delete(m_sXmlPath);
}
XmlDocument xmlDoc = new XmlDocument();
XmlElement data = xmlDoc.CreateElement("data");
xmlDoc.AppendChild(data);
//地图数据
XmlElement xml_items = xmlDoc.CreateElement("items");
data.AppendChild(xml_items);
foreach (GameObject item in m_Items)
{
Debug.Log("要保存的数据：" + item.name + "位置：" + item.transform.position.x + "," + item.transform.position.y);
//save in xml file
XmlElement xml_item = xmlDoc.CreateElement("item");
xml_items.AppendChild(xml_item);
XmlElement name = xmlDoc.CreateElement("name");
name.InnerText = item.name;
xml_item.AppendChild(name);
XmlElement position_x = xmlDoc.CreateElement("position_x");
position_x.InnerText = item.transform.position.x.ToString();
xml_item.AppendChild(position_x);
XmlElement position_y = xmlDoc.CreateElement("position_y");
position_y.InnerText = item.transform.position.y.ToString();
xml_item.AppendChild(position_y);
}
xmlDoc.Save(m_sXmlPath);
Debug.Log("创建XML完毕");
m_Items.Clear();
return true;
} void ReadMap(XmlNode xml_items)
{
XmlNodeList items = xml_items.SelectNodes("item");
foreach (XmlNode current_node in items)
{
XmlNode current_name = current_node.SelectSingleNode("name");
XmlNode position_x = current_node.SelectSingleNode("position_x");
XmlNode position_y = current_node.SelectSingleNode("position_y");
Vector3 psition = new Vector3(float.Parse(position_x.InnerText), float.Parse(position_y.InnerText), -1);
if (current_name.InnerText == "wall")
{
m_readItem = Instantiate(m_ItemWall, psition, Quaternion.identity) as GameObject;
}
else if (current_name.InnerText == "gras")
{
m_readItem = Instantiate(m_ItemGras, psition, Quaternion.identity) as GameObject;
}
else if (current_name.InnerText == "steel")
{
m_readItem = Instantiate(m_ItemSteel, psition, Quaternion.identity) as GameObject;
}
else if (current_name.InnerText == "water")
{
m_readItem = Instantiate(m_ItemWater, psition, Quaternion.identity) as GameObject;
}
else continue;
m_readItem.name = current_name.InnerText;
Debug.Log("要读取的数据：" + m_readItem.name + "位置：" + m_readItem.transform.position.x + "," + m_readItem.transform.position.y);
m_Items.Add(m_readItem);
}
}关于拖拽控件，设计的想法是，地图的item在右边，然后点击item会复制一个点击到的item，然后可以拖拽这个复制出来的item到地图上，下面是实现代码：
void Update()
{
//检测鼠标左键的拾取
if (Input.GetMouseButtonDown(0))
{
//鼠标的屏幕坐标空间位置转射线
m_ray = Camera.main.ScreenPointToRay(Input.mousePosition);
m_rayhit = Physics2D.GetRayIntersection(m_ray);
//射线检测，相关检测信息保存到RaycastHit 结构中
if (m_rayhit)
{
//打印射线碰撞到的对象的名称
Debug.Log(m_rayhit.collider.gameObject.name);
if (m_rayhit.collider.gameObject.name == "walls" ||
m_rayhit.collider.gameObject.name == "grass" ||
m_rayhit.collider.gameObject.name == "steels" ||
m_rayhit.collider.gameObject.name == "waters")
{
m_clickItem = Instantiate(m_rayhit.collider.gameObject, m_rayhit.collider.transform.position, Quaternion.identity) as GameObject;
m_clickItem.name = m_rayhit.collider.gameObject.name.Substring(0, m_rayhit.collider.gameObject.name.Length - 1);
//m_clickItem.tag = m_clickItem.name; //ERROR: not define tag in editor
m_Items.Add(m_clickItem);
}
else if (m_rayhit.collider.gameObject.name == "wall" ||
m_rayhit.collider.gameObject.name == "gras" ||
m_rayhit.collider.gameObject.name == "steel" ||
m_rayhit.collider.gameObject.name == "water")
{
m_clickItem = m_rayhit.collider.gameObject;
}
else
{
m_clickItem = null;
}
}
else
{
m_clickItem = null;
}
}
if (Input.GetMouseButton(0))
{
if (m_clickItem != null)
{
m_clickItem.transform.position = SetPointInMap(new Vector3(camera.ScreenToWorldPoint(Input.mousePosition).x, camera.ScreenToWorldPoint(Input.mousePosition).y, -1));
}
}
if (Input.GetMouseButtonUp(0))
{
if (m_clickItem != null)
{
Vector3 cur_point = SetPointInMap(new Vector3(camera.ScreenToWorldPoint(Input.mousePosition).x, camera.ScreenToWorldPoint(Input.mousePosition).y, -1));
if (m_Map.collider2D.OverlapPoint(cur_point))
{
m_clickItem.transform.position = cur_point;
}
else //在地图外就销毁掉
{
Destroy(m_clickItem);
}
}
}
}【跟我一起学Unity3D】做一个2D的90坦克大战之地图编辑器
原文地址：http://blog.csdn.net/nxshow/article/details/40660201
