private static T CreateShape <T>(MenuCommand menuCommand) where T : Shape
{
GameObject go = ObjectFactory.CreateGameObject(typeof(T).Name);
T shape = Undo.AddComponent <T>(go);
var camera = SceneView.lastActiveSceneView.camera;
Ray ray = new Ray(camera.transform.position, camera.transform.forward);
if (!PlaneUtils.RayCastPlaneXZ(ray, out Vector3 pos))
{
pos = ray.origin + ray.direction * 10;
}
go.transform.position = pos;
if (menuCommand.context is GameObject parent)
{
Undo.SetTransformParent(go.transform, parent.transform, "CreateSharp");
}
Selection.activeGameObject = go;
//EditorGUIUtility.PingObject(go);
SceneView.lastActiveSceneView.FrameSelected();
return(shape);
}
private void OnSceneGUI()
{
bool enableEditor = targets.Length == 1;
var shape = target as PolyShape;
if (worldPoints == null || worldPoints.Length != shape.Points.Count)
{
worldPoints = new Vector3[shape.Points.Count];
}
Vector3 pos = shape.transform.position;
pos.y = 0;
Quaternion rotation = PlaneUtils.TransRotation(shape.transform.rotation);
Matrix4x4 matrix = Matrix4x4.TRS(pos, rotation, Vector3.one);
for (int i = 0; i < shape.Points.Count; ++i)
{
worldPoints[i] = matrix.MultiplyPoint(shape.Points[i]);
}
//计算鼠标点击在XZ平面的点
Ray ray = HandleUtility.GUIPointToWorldRay(Event.current.mousePosition);
if (!PlaneUtils.RayCastPlaneXZ(ray, out Vector3 mousePos))
{
return;//鼠标没有点击在XZ平面
}
var result = PlaneUtils.ClosestPointToPolyLine(mousePos, worldPoints);
Vector3 closePoint = result.Point;
int index = result.Index;
using (new Handles.DrawingScope(Color.green))
{
//画边缘线
for (int i = 0; i < worldPoints.Length; ++i)
{
int nextIndex = i + 1;
if (nextIndex == shape.Points.Count)
{
nextIndex = 0;
}
Vector3 pt = worldPoints[i];
Handles.DrawLine(pt, worldPoints[nextIndex]);
if (enableEditor)
{
//点位置编辑
float handleSize = HandleUtility.GetHandleSize(pt) * 0.05f;
EditorGUI.BeginChangeCheck();
pt = Handles.FreeMoveHandle(pt, Quaternion.identity, handleSize, new Vector3(1, 0, 1), Handles.DotHandleCap);
if (EditorGUI.EndChangeCheck())
{
Undo.RecordObject(shape, "move polygon point");
EditorUtility.SetDirty(shape);
pt = matrix.inverse.MultiplyPoint(pt);
pt.y = 0;
worldPoints[i] = pt;
shape.Points[i] = pt;
shape.SetDirty();
}
}
}
if (!enableEditor)
{
return;
}
if (Event.current.control)
{//移除点
if (worldPoints.Length > 3)
{
int removeIndex = index + 1;
if (removeIndex == worldPoints.Length)
{
removeIndex = 0;
}
int preIndex = removeIndex - 1;
if (preIndex < 0)
{
preIndex = worldPoints.Length - 1;
}
int nextIndex = removeIndex + 1;
if (nextIndex == worldPoints.Length)
{
nextIndex = 0;
}
Handles.DrawLine(worldPoints[preIndex], worldPoints[nextIndex]);
using (new Handles.DrawingScope(Color.red))
{
Handles.DrawAAPolyLine(5, worldPoints[preIndex], worldPoints[removeIndex]);
Handles.DrawAAPolyLine(5, worldPoints[nextIndex], worldPoints[removeIndex]);
float handleSize = HandleUtility.GetHandleSize(worldPoints[removeIndex]) * 0.05f;
var pt1 = HandleUtility.WorldToGUIPoint(worldPoints[removeIndex]);
var pt2 = HandleUtility.WorldToGUIPoint(mousePos);
float pickSize = Vector2.Distance(pt1, pt2) + 0.1f;
if (Handles.Button(worldPoints[removeIndex], Quaternion.identity, handleSize, pickSize, Handles.DotHandleCap))
{
Undo.RecordObject(shape, "delete polygon point");
EditorUtility.SetDirty(shape);
shape.Points.RemoveAt(removeIndex);
shape.SetDirty();
Event.current.Use();
}
}
}
}
else if (Event.current.shift && (result.SegmentLength * result.NormalLength) > 0.1f && (result.SegmentLength * result.NormalLength) < (result.SegmentLength - 0.1f))
{//添加点
{
float handleSize = HandleUtility.GetHandleSize(closePoint) * 0.08f;
//画距离鼠标最近的点
Handles.SphereHandleCap(0, closePoint, Quaternion.identity, handleSize, Event.current.type);
}
int insertIndex = index + 1;
if (insertIndex == worldPoints.Length)
{
insertIndex = 0;
}
using (new Handles.DrawingScope(Color.white))
{
Handles.DrawLine(mousePos, worldPoints[index]);
Handles.DrawLine(mousePos, worldPoints[insertIndex]);
float handleSize = HandleUtility.GetHandleSize(mousePos) * 0.05f;
if (Handles.Button(mousePos, Quaternion.identity, handleSize, 0.1f, Handles.DotHandleCap))
{
Undo.RecordObject(shape, "add polygon point");
EditorUtility.SetDirty(shape);
var pt = matrix.inverse.MultiplyPoint(mousePos);
shape.Points.Insert(insertIndex, pt);
shape.SetDirty();
Event.current.Use();
}
}
}
}
SceneView.RepaintAll();
}
