public static void CreateBezierPath()
{
GameObject go = new GameObject("BezierPath");
BezierPath path = go.AddComponent<BezierPath>();
BezierPath.PathPoint p = new BezierPath.PathPoint();
path.points.Add(p);
}
void addPoint(BezierPath path, BezierPath.PathPoint point)
{
Undo.RegisterUndo(path, "create bezier point");
// if lsat point, add new. if middle point, add point inbetween
if(path.points.Count - 1 == path.points.IndexOf(point))
{
// add at end
BezierPath.PathPoint p = new BezierPath.PathPoint();
if(point.h1.magnitude < Mathf.Epsilon)
p.p1 = point.p1 + (Vector3.right) * 2;
else
p.p1 = point.p1 + (point.h1).normalized * 2;
p.h1 = point.h1;
path.points.Add(p);
selectedPoint = p;
}
else
{
// add in middle
BezierPath.PathPoint point2 = path.points[path.points.IndexOf(point) + 1];
Bezier b = new Bezier(point.p1, point.h1, -point2.h1, point2.p1);
BezierPath.PathPoint p = new BezierPath.PathPoint();
p.p1 = b.GetPointAtTime(0.5f);
p.h1 = b.GetPointAtTime(0.6f) - p.p1;
path.points.Insert(path.points.IndexOf(point) + 1, p);
}
}
void addPoint(BezierPath path, BezierPath.PathPoint point)
{
Undo.RegisterUndo(path, "create bezier point");
// if lsat point, add new. if middle point, add point inbetween
if (path.points.Count - 1 == path.points.IndexOf(point))
{
// add at end
BezierPath.PathPoint p = new BezierPath.PathPoint();
if (point.h1.magnitude < Mathf.Epsilon)
{
p.p1 = point.p1 + (Vector3.right) * 2;
}
else
{
p.p1 = point.p1 + (point.h1).normalized * 2;
}
p.h1 = point.h1;
path.points.Add(p);
selectedPoint = p;
}
else
{
// add in middle
BezierPath.PathPoint point2 = path.points[path.points.IndexOf(point) + 1];
Bezier b = new Bezier(point.p1, point.h1, -point2.h1, point2.p1);
BezierPath.PathPoint p = new BezierPath.PathPoint();
p.p1 = b.GetPointAtTime(0.5f);
p.h1 = b.GetPointAtTime(0.6f) - p.p1;
path.points.Insert(path.points.IndexOf(point) + 1, p);
}
}
public static void CreateBezierPath()
{
GameObject go = new GameObject("BezierPath");
BezierPath path = go.AddComponent <BezierPath>();
BezierPath.PathPoint p = new BezierPath.PathPoint();
path.points.Add(p);
}
void deletePoint(BezierPath path, BezierPath.PathPoint point)
{
Undo.RegisterUndo(path, "delete bezier point");
if (path.points.Count > 1)
{
path.points.Remove(point);
}
if (selectedPoint == point)
{
selectedPoint = path.points[0];
}
}
void deletePoint(BezierPath path, BezierPath.PathPoint point)
{
Undo.RegisterUndo(path, "delete bezier point");
if(path.points.Count > 1)
path.points.Remove(point);
if(selectedPoint == point)
selectedPoint = path.points[0];
}
void OnSceneGUI()
{
BezierPath path = (BezierPath)target;
if(Event.current.type == EventType.mouseDown)
{
// record positions
pointPos = selectedPoint.p1;
handlePos = selectedPoint.h1;
}
if(Event.current.type == EventType.mouseUp)
{
if(selectedPoint.p1 != pointPos || selectedPoint.h1 != handlePos)
{
// put them back, register undo
Vector3 newPos = selectedPoint.p1;
Vector3 newHandle = selectedPoint.h1;
selectedPoint.p1 = pointPos;
selectedPoint.h1 = handlePos;
Undo.RegisterUndo(path, "moving point");
selectedPoint.p1 = newPos;
selectedPoint.h1 = newHandle;
EditorUtility.SetDirty(path);
}
}
bool needCreatePoint = false;
bool needDeletePoint = false;
if(selectedPoint != null && Event.current.type != EventType.repaint)
{
// add + and - buttons
Handles.BeginGUI();
Vector2 screenpos = HandleUtility.WorldToGUIPoint(selectedPoint.p1);
// inverse y
//screenpos.y = Screen.height - screenpos.y;
if(GUI.Button(new Rect(screenpos.x - 10 + 20, screenpos.y - 20, 20, 20), "+"))
needCreatePoint = true;
if(GUI.Button(new Rect(screenpos.x - 10 - 20, screenpos.y - 20, 20, 20), "-"))
needDeletePoint = true;
Handles.EndGUI();
}
// disable transform tool if selected
if(Selection.activeGameObject == path.gameObject)
{
Tools.current = Tool.None;
if(selectedPoint == null && path.points.Count > 0)
selectedPoint = path.points[0];
}
// draw the handles for the points
foreach(BezierPath.PathPoint point in path.points)
{
if(point == selectedPoint)
{
//if (GUI.changed)
// EditorUtility.SetDirty(target);
point.p1 = Handles.PositionHandle(point.p1, Quaternion.identity);
point.h1 = Handles.PositionHandle(point.h1 + point.p1, Quaternion.identity) - point.p1;
Handles.CubeCap(0, point.p1, Quaternion.identity, 1);
Handles.CubeCap(0, point.h1 + point.p1, Quaternion.identity, 0.5f);
}
else
{
// draw button
float size = 1;//HandleUtility.GetHandleSize(point.p1) / 3;
if(Handles.Button(point.p1, Quaternion.identity, 1, size, Handles.CubeCap))
{
selectedPoint = point;
}
}
}
Handles.color = path.lineColor;
// draw the lines
for(int i = 0; i < path.points.Count - 1; i++)
{
// draw line from point i to point i+1
path.points[i].bezier.p1 = path.points[i].p1;
path.points[i].bezier.h1 = path.points[i].h1;
path.points[i].bezier.p2 = path.points[i + 1].p1;
path.points[i].bezier.h2 = -path.points[i + 1].h1; // negative of this handle
Vector3 oldPos = path.points[i].bezier.GetPointAtTime(0);
for(float t = 0; t < 1.01; t += 0.1f)
{
Vector3 newPos = path.points[i].bezier.GetPointAtTime(t);
Handles.DrawLine(oldPos, newPos);
oldPos = newPos;
}
}
if(selectedPoint != null && Event.current.type == EventType.repaint)
{
// add + and - buttons
Handles.BeginGUI();
Vector2 screenpos = HandleUtility.WorldToGUIPoint(selectedPoint.p1);
// inverse y
//screenpos.y = Screen.height - screenpos.y;
if(GUI.Button(new Rect(screenpos.x - 10 + 20, screenpos.y - 20, 20, 20), "+"))
needCreatePoint = true;
if(GUI.Button(new Rect(screenpos.x - 10 - 20, screenpos.y - 20, 20, 20), "-"))
needDeletePoint = true;
Handles.EndGUI();
}
if(needCreatePoint)
addPoint(path, selectedPoint);
if(needDeletePoint)
deletePoint(path, selectedPoint);
if(GUI.changed)
EditorUtility.SetDirty(target);
}
void OnSceneGUI()
{
BezierPath path = (BezierPath)target;
if (Event.current.type == EventType.MouseDown)
{
// record positions
pointPos = selectedPoint.p1;
handlePos = selectedPoint.h1;
}
if (Event.current.type == EventType.MouseUp)
{
if (selectedPoint.p1 != pointPos || selectedPoint.h1 != handlePos)
{
// put them back, register undo
Vector3 newPos = selectedPoint.p1;
Vector3 newHandle = selectedPoint.h1;
selectedPoint.p1 = pointPos;
selectedPoint.h1 = handlePos;
Undo.RegisterUndo(path, "moving point");
selectedPoint.p1 = newPos;
selectedPoint.h1 = newHandle;
EditorUtility.SetDirty(path);
}
}
bool needCreatePoint = false;
bool needDeletePoint = false;
if (selectedPoint != null && Event.current.type != EventType.Repaint)
{
// add + and - buttons
Handles.BeginGUI();
Vector2 screenpos = HandleUtility.WorldToGUIPoint(selectedPoint.p1);
// inverse y
//screenpos.y = Screen.height - screenpos.y;
if (GUI.Button(new Rect(screenpos.x - 10 + 20, screenpos.y - 20, 20, 20), "+"))
{
needCreatePoint = true;
}
if (GUI.Button(new Rect(screenpos.x - 10 - 20, screenpos.y - 20, 20, 20), "-"))
{
needDeletePoint = true;
}
Handles.EndGUI();
}
// disable transform tool if selected
if (Selection.activeGameObject == path.gameObject)
{
Tools.current = Tool.None;
if (selectedPoint == null && path.points.Count > 0)
{
selectedPoint = path.points[0];
}
}
// draw the handles for the points
foreach (BezierPath.PathPoint point in path.points)
{
if (point == selectedPoint)
{
//if (GUI.changed)
// EditorUtility.SetDirty(target);
point.p1 = Handles.PositionHandle(point.p1, Quaternion.identity);
point.h1 = Handles.PositionHandle(point.h1 + point.p1, Quaternion.identity) - point.p1;
Handles.CubeCap(0, point.p1, Quaternion.identity, 1);
Handles.CubeCap(0, point.h1 + point.p1, Quaternion.identity, 0.5f);
}
else
{
// draw button
float size = 1;//HandleUtility.GetHandleSize(point.p1) / 3;
if (Handles.Button(point.p1, Quaternion.identity, 1, size, Handles.CubeCap))
{
selectedPoint = point;
}
}
}
Handles.color = path.lineColor;
// draw the lines
for (int i = 0; i < path.points.Count - 1; i++)
{
// draw line from point i to point i+1
path.points[i].bezier.p1 = path.points[i].p1;
path.points[i].bezier.h1 = path.points[i].h1;
path.points[i].bezier.p2 = path.points[i + 1].p1;
path.points[i].bezier.h2 = -path.points[i + 1].h1; // negative of this handle
Vector3 oldPos = path.points[i].bezier.GetPointAtTime(0);
for (float t = 0; t < 1.01; t += 0.1f)
{
Vector3 newPos = path.points[i].bezier.GetPointAtTime(t);
Handles.DrawLine(oldPos, newPos);
oldPos = newPos;
}
}
if (selectedPoint != null && Event.current.type == EventType.Repaint)
{
// add + and - buttons
Handles.BeginGUI();
Vector2 screenpos = HandleUtility.WorldToGUIPoint(selectedPoint.p1);
// inverse y
//screenpos.y = Screen.height - screenpos.y;
if (GUI.Button(new Rect(screenpos.x - 10 + 20, screenpos.y - 20, 20, 20), "+"))
{
needCreatePoint = true;
}
if (GUI.Button(new Rect(screenpos.x - 10 - 20, screenpos.y - 20, 20, 20), "-"))
{
needDeletePoint = true;
}
Handles.EndGUI();
}
if (needCreatePoint)
{
addPoint(path, selectedPoint);
}
if (needDeletePoint)
{
deletePoint(path, selectedPoint);
}
if (GUI.changed)
{
EditorUtility.SetDirty(target);
}
}
