Unity 编辑器开发SceneView GUI控制
前几天项目需要就做了个类似于Collider EditCollider的功能
下面是我做的效果
基础代码如下：
public class ExportCFGInputWindow : EditorWindow
{
public static ExportCFGInputWindow instance;
Vector3 dot1, dot2, dot3, dot4;
void OnEnable() {
instance = this;
SceneView.duringSceneGui -= this.OnSceneGUI;
SceneView.duringSceneGui += this.OnSceneGUI;
dot1 = new Vector3(0, 0, 0);
dot2 = new Vector3(0, 0, 1);
dot3 = new Vector3(1, 0, 1);
dot4 = new Vector3(1, 0, 0);
mid1Cor = Color.green;
mid2Cor = Color.green;
mid3Cor = Color.green;
mid4Cor = Color.green;
}
void OnDisable() {
instance = null;
SceneView.duringSceneGui -= this.OnSceneGUI;
}
void OnSceneGUI(SceneView sceneView)
{
Handles.color = Color.green;
Handles.DrawAAPolyLine(2, dot1, dot2, dot3, dot4, dot1);
}
}
效果如图
下面是我踩的坑
先不管先把小绿点画于是我在OnSceneGui方法里面插入了如下代码
void OnSceneGUI(SceneView sceneView)
{
Handles.color = Color.green;
Handles.DrawAAPolyLine(2, dot1, dot2, dot3, dot4, dot1);
Handles.DotHandleCap(0, new Vector3((dot1.x + dot2.x) * 0.5f, 0, (dot1.z + dot2.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, EventType.Repaint);
//0.005f * sceneView.size 的作用是让小绿点无论你把场景放大或者缩小都是一样大。
Handles.DotHandleCap(0, new Vector3((dot2.x + dot3.x) * 0.5f, 0, (dot2.z + dot3.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, EventType.Repaint); Handles.DotHandleCap(0, new Vector3((dot3.x + dot4.x) * 0.5f, 0, (dot3.z + dot4.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, EventType.Repaint); Handles.DotHandleCap(0, new Vector3((dot4.x + dot1.x) * 0.5f, 0, (dot4.z + dot1.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, EventType.Repaint); }
这是画完绿点的样子
虽然有了绿点但是没法控制于是我写了个方法来监听鼠标，这个方法在OnSceneGUI函数中调用。具体思路是：绿点的位置知道，只要监听鼠标在绿点下按下然后移动鼠标，我控制绿点两端的点跟着鼠标移动就可以完成了。
但是！万事都怕但是。出现了一个令我头大的问题：鼠标左键的EventType.MouseUp事件我监听不到（这个问题求好心人帮忙解释一下。）导致我无法停止对相应点的控制，当然鼠标中键和鼠标右键没有问题，但是鼠标中键和鼠标右键会在编辑器下有其他操作。于是我放弃了这个思路。（这里代码就不上了）
既然鼠标不行被逼无奈我就使用了键盘控制的方式 ，思路如下：
4键控制上图最左边的小绿点，8键控制最上面的小绿点，6键控制最右面的小绿点，2键控制最下面的小绿点。+键表示该点向外伸，-键表示该点向外内缩。
下面是代码
int ExportDir = 0;//移动方向
void CheckKey()//这个方法在OnSeneGui函数中调用 { Event e = Event.current; if (e.type == EventType.KeyDown) { if (e.keyCode == KeyCode.Keypad4) { ExportDir = 4; mid1Cor = Color.red; mid2Cor = Color.green; mid3Cor = Color.green; mid4Cor = Color.green; } if (e.keyCode == KeyCode.Keypad6) { ExportDir = 6; mid1Cor = Color.green; mid2Cor = Color.green; mid3Cor = Color.red; mid4Cor = Color.green; } if (e.keyCode == KeyCode.Keypad2) { ExportDir = 2; mid1Cor = Color.green; mid2Cor = Color.green; mid3Cor = Color.green; mid4Cor = Color.red; } if (e.keyCode == KeyCode.Keypad8) { ExportDir = 8; mid1Cor = Color.green; mid2Cor = Color.red; mid3Cor = Color.green; mid4Cor = Color.green; } if (e.keyCode == KeyCode.KeypadPlus) { //ExportDir = 4; Plus(ExportDir); } if (e.keyCode == KeyCode.KeypadMinus) { //ExportDir = 4; Minus(ExportDir); } } }
float EditorSpeed = 0.05f; void Plus(int dir) { if (dir == 4) { dot1.x -= EditorSpeed; dot2.x -= EditorSpeed; } else if (dir == 6) { dot3.x += EditorSpeed; dot4.x += EditorSpeed; } else if (dir == 2) { dot1.z -= EditorSpeed; dot4.z -= EditorSpeed; } else if (dir == 8) { dot2.z += EditorSpeed; dot3.z += EditorSpeed; } else { return; } } void Minus(int dir) { if (dir == 4) { dot1.x += EditorSpeed; dot2.x += EditorSpeed; } else if (dir == 6) { dot3.x -= EditorSpeed; dot4.x -= EditorSpeed; } else if (dir == 2) { dot1.z += EditorSpeed; dot4.z += EditorSpeed; } else if (dir == 8) { dot2.z -= EditorSpeed; dot3.z -= EditorSpeed; } else { return; } }
这样一来我先按下数字键4在按下+键最左边的点就会向左移动了
为了显示清楚我还对小绿点显示颜色左了相应的处理，当选择哪个点做动作时它就会变红，代码如下
Color mid1Cor = Color.green;
Color mid2Cor = Color.green;
Color mid3Cor = Color.green;
Color mid4Cor = Color.green;
void OnSceneGUI(SceneView sceneView)
{
Handles.color = Color.green;
Handles.DrawAAPolyLine(2, dot1, dot2, dot3, dot4, dot1);
Handles.color = mid1Cor;
Handles.DotHandleCap(0, new Vector3((dot1.x + dot2.x) * 0.5f, 0, (dot1.z + dot2.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, EventType.Repaint);
Handles.color = mid2Cor;
Handles.DotHandleCap(0, new Vector3((dot2.x + dot3.x) * 0.5f, 0, (dot2.z + dot3.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, EventType.Repaint);
Handles.color = mid3Cor;
Handles.DotHandleCap(0, new Vector3((dot3.x + dot4.x) * 0.5f, 0, (dot3.z + dot4.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, EventType.Repaint);
Handles.color = mid4Cor;
Handles.DotHandleCap(0, new Vector3((dot4.x + dot1.x) * 0.5f, 0, (dot4.z + dot1.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, EventType.Repaint);
CheckKey();
}
效果如下：
这个功能也能勉强满足需求，暂时就这样了。
后来有一天，我发现有人这样用
Handles.FreeMoveHandle(target.pos,Quaternion.identity,2.0,Vector3.zero,Handles.DrawRectangle);
Handles类的FreeMoveHandle函数我马上查了一下API发现
public static Vector3 FreeMoveHandle(Vector3 position, Quaternion rotation, float size, Vector3 snap, DrawCapFunction capFunc);
最后一个参数是个委托。我一下子就明白改怎么弄了。代码如下
void OnSceneGUI(SceneView sceneView)
{
Handles.color = Color.green;
Handles.DrawAAPolyLine(2, dot1, dot2, dot3, dot4, dot1);
float m1px = Handles.FreeMoveHandle(new Vector3((dot1.x + dot2.x) * 0.5f, 0, (dot1.z + dot2.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, Vector3.zero, Handles.DotCap).x;
dot1 = new Vector3(m1px, 0, dot1.z);
dot2 = new Vector3(m1px, 0, dot2.z);
float m2px = Handles.FreeMoveHandle(new Vector3((dot2.x + dot3.x) * 0.5f, 0, (dot2.z + dot3.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, Vector3.zero, Handles.DotCap).z;
dot2 = new Vector3(dot2.x, 0, m2px);
dot3 = new Vector3(dot3.x, 0, m2px);
float m3px = Handles.FreeMoveHandle(new Vector3((dot3.x + dot4.x) * 0.5f, 0, (dot3.z + dot4.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, Vector3.zero, Handles.DotCap).x;
dot3 = new Vector3(m3px, 0, dot3.z);
dot4 = new Vector3(m3px, 0, dot4.z);
float m4px = Handles.FreeMoveHandle(new Vector3((dot4.x + dot1.x) * 0.5f, 0, (dot4.z + dot1.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, Vector3.zero, Handles.DotCap).z;
dot4 = new Vector3(dot4.x, 0, m4px);
dot1 = new Vector3(dot1.x, 0, m4px);
}
这样就达到了我想要的鼠标控制小绿点的效果。但是键盘控制的代码我也保留了，因为我觉得这是个教训，而且在有时候键盘控制也蛮方便的。
完整代码如下：
public class ExportCFGInputWindow : EditorWindow
{
public static ExportCFGInputWindow instance;
Vector3 dot1, dot2, dot3, dot4;
Color mid1Cor, mid2Cor, mid3Cor, mid4Cor;
int ExportDir = 0;
float EditorSpeed = 0.05f;
void OnEnable() {
instance = this;
SceneView.duringSceneGui -= this.OnSceneGUI;
SceneView.duringSceneGui += this.OnSceneGUI;
dot1 = new Vector3(0, 0, 0);
dot2 = new Vector3(0, 0, 1);
dot3 = new Vector3(1, 0, 1);
dot4 = new Vector3(1, 0, 0);
mid1Cor = Color.green;
mid2Cor = Color.green;
mid3Cor = Color.green;
mid4Cor = Color.green;
}
void OnDisable() {
instance = null;
SceneView.duringSceneGui -= this.OnSceneGUI;
}
Vector3 m1, m2, m3, m4;
void OnSceneGUI(SceneView sceneView)
{
Handles.color = Color.green;
Handles.DrawAAPolyLine(2, dot1, dot2, dot3, dot4, dot1);
#region 鼠标控制
float m1px = Handles.FreeMoveHandle(new Vector3((dot1.x + dot2.x) * 0.5f, 0, (dot1.z + dot2.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, Vector3.zero, Handles.DotCap).x;
dot1 = new Vector3(m1px, 0, dot1.z);
dot2 = new Vector3(m1px, 0, dot2.z);
float m2px = Handles.FreeMoveHandle(new Vector3((dot2.x + dot3.x) * 0.5f, 0, (dot2.z + dot3.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, Vector3.zero, Handles.DotCap).z;
dot2 = new Vector3(dot2.x, 0, m2px);
dot3 = new Vector3(dot3.x, 0, m2px);
float m3px = Handles.FreeMoveHandle(new Vector3((dot3.x + dot4.x) * 0.5f, 0, (dot3.z + dot4.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, Vector3.zero, Handles.DotCap).x;
dot3 = new Vector3(m3px, 0, dot3.z);
dot4 = new Vector3(m3px, 0, dot4.z);
float m4px = Handles.FreeMoveHandle(new Vector3((dot4.x + dot1.x) * 0.5f, 0, (dot4.z + dot1.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, Vector3.zero, Handles.DotCap).z;
dot4 = new Vector3(dot4.x, 0, m4px);
dot1 = new Vector3(dot1.x, 0, m4px);
#endregion
#region 键盘控制
Handles.color = mid1Cor;
Handles.DotHandleCap(0, new Vector3((dot1.x + dot2.x) * 0.5f, 0, (dot1.z + dot2.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, EventType.Repaint);
Handles.color = mid2Cor;
Handles.DotHandleCap(0, new Vector3((dot2.x + dot3.x) * 0.5f, 0, (dot2.z + dot3.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, EventType.Repaint);
Handles.color = mid3Cor;
Handles.DotHandleCap(0, new Vector3((dot3.x + dot4.x) * 0.5f, 0, (dot3.z + dot4.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, EventType.Repaint);
Handles.color = mid4Cor;
Handles.DotHandleCap(0, new Vector3((dot4.x + dot1.x) * 0.5f, 0, (dot4.z + dot1.z) * 0.5f), Quaternion.identity, 0.005f * sceneView.size, EventType.Repaint);
CheckKey();
#endregion
}
void CheckKey()
{
Event e = Event.current;
if (e.type == EventType.KeyDown)
{
if (e.keyCode == KeyCode.Keypad4)
{
ExportDir = 4;
mid1Cor = Color.red;
mid2Cor = Color.green;
mid3Cor = Color.green;
mid4Cor = Color.green;
}
if (e.keyCode == KeyCode.Keypad6)
{
ExportDir = 6;
mid1Cor = Color.green;
mid2Cor = Color.green;
mid3Cor = Color.red;
mid4Cor = Color.green;
}
if (e.keyCode == KeyCode.Keypad2)
{
ExportDir = 2;
mid1Cor = Color.green;
mid2Cor = Color.green;
mid3Cor = Color.green;
mid4Cor = Color.red;
}
if (e.keyCode == KeyCode.Keypad8)
{
ExportDir = 8;
mid1Cor = Color.green;
mid2Cor = Color.red;
mid3Cor = Color.green;
mid4Cor = Color.green;
}
if (e.keyCode == KeyCode.KeypadPlus)
{
//ExportDir = 4;
Plus(ExportDir);
}
if (e.keyCode == KeyCode.KeypadMinus)
{
//ExportDir = 4;
Minus(ExportDir);
}
}
}
void Plus(int dir)
{
if (dir == 4)
{
dot1.x -= EditorSpeed;
dot2.x -= EditorSpeed;
}
else if (dir == 6)
{
dot3.x += EditorSpeed;
dot4.x += EditorSpeed;
}
else if (dir == 2)
{
dot1.z -= EditorSpeed;
dot4.z -= EditorSpeed;
}
else if (dir == 8)
{
dot2.z += EditorSpeed;
dot3.z += EditorSpeed;
}
else
{
return;
}
}
void Minus(int dir)
{
if (dir == 4)
{
dot1.x += EditorSpeed;
dot2.x += EditorSpeed;
}
else if (dir == 6)
{
dot3.x -= EditorSpeed;
dot4.x -= EditorSpeed;
}
else if (dir == 2)
{
dot1.z += EditorSpeed;
dot4.z += EditorSpeed;
}
else if (dir == 8)
{
dot2.z -= EditorSpeed;
dot3.z -= EditorSpeed;
}
else
{
return;
}
}
private void OnGUI()
{
GUILayout.BeginVertical();
//标签
GUILayout.BeginHorizontal();
GUILayout.Box("输入相应的参数", TitleBoxStyle(), GUILayout.Height(60),GUILayout.ExpandWidth(true));
GUILayout.EndHorizontal();
GUILayout.Space(10);
GUILayout.BeginHorizontal();
GUIStyle boxStyle = new GUIStyle();
boxStyle.alignment = TextAnchor.MiddleCenter;
GUILayout.Box("当前移动速度"+ EditorSpeed, boxStyle, GUILayout.Height(30), GUILayout.Width(80));
GUILayout.Space(10);
EditorSpeed = GUILayout.HorizontalSlider(EditorSpeed, 0.01f, 1);
GUILayout.EndHorizontal();
GUILayout.EndVertical();
}
}
希望这次的分享对大家有点收获，不好的地方希望大家能帮我指出。
