/// <summary>
/// Renders all handles and tangents when applicable.
/// </summary>
private void RenderHandles()
{
int pointCount = spline.GetControlPointCount();
int index = 0;
Handles.color = Color.white;
for (int i = pointCount - 1; i >= 0; i--)
{
ControlPoint p = spline.GetControlPoint(i);
ShowPoint(p, index);
index++;
}
int segCount = spline.GetCurveCount();
if (segCount <= 0)
{
return;
}
for (int i = segCount - 1; i >= 0; i--)
{
BezierCurve seg = spline.GetCurve(i);
Handles.color = Color.green;
//Display Tangents
if (!deletePointMode)
{
if (seg.GetStartPoint().tangentForward)
{
ShowTangentPoint(seg.GetStartPoint(), seg.GetStartPoint().tangentForward, index);
index++;
}
if (seg.GetEndPoint().tangentBackward)
{
ShowTangentPoint(seg.GetEndPoint(), seg.GetEndPoint().tangentBackward, index);
index++;
}
}
}
}
/// <summary>
/// Handle the drag and drop of the control point.
/// </summary>
public override void MouseUp(int x, int y)
{
if (selectedPoint != null)
{
// Update the selected point to the mouse button release location.
selectedPoint.x = x;
selectedPoint.y = y;
selectedPoint = null;
}
else
{
// No control point was selected, the mouse up event must be the
// user clicking to add another control point.
controlPoints.Add(new Vector2(x, y));
}
// Generate the bezier curve.
bezier = new BezierCurve(controlPoints);
}
private void OnSceneGUI()
{
_curve = target as BezierCurve;
_handleTransform = _curve.transform;
_handleRotation = Tools.pivotRotation == PivotRotation.Local ?
_handleTransform.rotation : Quaternion.identity;
Vector3 p0 = ShowPoint(0);
Vector3 p1 = ShowPoint(1);
Vector3 p2 = ShowPoint(2);
Vector3 p3 = ShowPoint(3);
// The color of the line
Handles.color = Color.gray;
Handles.DrawLine(p0, p1);
Handles.DrawLine(p2, p3);
ShowDirections();
Handles.DrawBezier(p0, p3, p1, p2, Color.white, null, 2.0f);
}
/// <summary>
/// Splits a Curve and adds a new ControlPoint.
/// </summary>
/// <param name="point">Point to insert.</param>
/// <param name="curve">Curve to be split.</param>
public void InsertControlPoint(ControlPoint point, BezierCurve curve)
{
int index = curves.IndexOf(curve);
ControlPoint last = controlPoints[index];
ControlPoint next = controlPoints[index + 1];
controlPoints.Insert(index + 1, point);
curves[index] = new BezierCurve(this, point, next);
BezierCurve newCurve = new BezierCurve(this, last, point);
curves.Insert(index, newCurve);
if (index + 2 >= curves.Count)
{
return;
}
for (int i = index + 2; i < curves.Count; i++)
{
curves[i].controlPointIndices[0]++;
curves[i].controlPointIndices[1]++;
}
}
private void OnSceneGUI()
{
GetCurveAndTransform();
Handles.BeginGUI();
GUIStyle sceneLabelStyle = new GUIStyle();
sceneLabelStyle.normal.textColor = Color.white;
sceneLabelStyle.alignment = TextAnchor.UpperCenter;
#region Scene View Labels
if (addPointMode)
{
GUI.Label(new Rect(Screen.width * 0.5f - 125, 10, 250, 30), "Left click to add a point", sceneLabelStyle);
}
if (insertPointMode)
{
GUI.Label(new Rect(Screen.width * 0.5f - 125, 10, 250, 30), "Left click to place a point", sceneLabelStyle);
}
if (selectedIndex > -1)
{
GUI.Label(new Rect(Screen.width * 0.5f - 125, 10, 250, 30), "Left click a point to move it", sceneLabelStyle);
}
if (deletePointMode)
{
GUI.Label(new Rect(Screen.width * 0.5f - 125, 10, 250, 30), "Left click a point to delete it", sceneLabelStyle);
}
Handles.EndGUI();
#endregion
#region Intercept Clicks
if ((addPointMode || insertPointMode || deletePointMode) && Event.current.type == EventType.Layout)
{
HandleUtility.AddDefaultControl(0);
}
#endregion
#region Add/Insert Control Points
if ((addPointMode || insertPointMode) && Event.current.type == EventType.MouseDown && Event.current.button == 0)
{
Ray ray = HandleUtility.GUIPointToWorldRay(Event.current.mousePosition);
Plane plane = new Plane(-Camera.current.transform.forward, handleTransform.position);
float enter = 0.0f;
if (addPointMode && plane.Raycast(ray, out enter))
{
Vector3 hitPoint = handleTransform.InverseTransformPoint(ray.GetPoint(enter));
Undo.RecordObject(spline, "Add Control Point");
EditorUtility.SetDirty(spline);
lastPoint = new ControlPoint(hitPoint);
if (spline.GetControlPointCount() > 0)
{
Vector3 p = spline.GetControlPoint(0);
Vector3 rayToP = (p - ray.origin);
float angle = Mathf.Deg2Rad * Vector3.Angle(rayToP.normalized, ray.direction);
float dist = Mathf.Sin(angle) * rayToP.magnitude;
if (dist < 0.2f)
{
lastPoint = spline.GetControlPoint(0);
addPointMode = false;
ResetTools();
SceneView.RepaintAll();
}
}
spline.AddControlPoint(lastPoint);
}
else if (insertPointMode)
{
float t;
float dist = -1;
if (spline.GetClosestDistanceToRay(ray, out dist))
{
Undo.RecordObject(spline, "Insert Control Point");
EditorUtility.SetDirty(spline);
Vector3 localPos = handleTransform.InverseTransformPoint(spline.GetPointOnSplineByDistance(dist));
lastPoint = new ControlPoint(localPos);
BezierCurve curve = spline.GetCurveFromDistance(dist, out t);
spline.InsertControlPoint(lastPoint, curve);
}
}
Event.current.Use();
}
if ((addPointMode || insertPointMode) && lastPoint != null && Event.current.type == EventType.MouseDrag && Event.current.button == 0)
{
Ray ray = HandleUtility.GUIPointToWorldRay(Event.current.mousePosition);
Plane plane = new Plane(-Camera.current.transform.forward, lastPoint);
float enter = 0.0f;
if (plane.Raycast(ray, out enter))
{
Vector3 hitPoint = handleTransform.InverseTransformPoint(ray.GetPoint(enter));
lastPoint.tangentForward = new CurveHandle(hitPoint - lastPoint);
lastPoint.tangentBackward = new CurveHandle(lastPoint - hitPoint);
}
Event.current.Use();
}
if ((addPointMode || insertPointMode) && Event.current.type == EventType.MouseUp && Event.current.button == 0)
{
Undo.RecordObject(spline, "Move Tangent");
EditorUtility.SetDirty(spline);
lastPoint = null;
Event.current.Use();
}
#endregion
spline.RenderCurvesInSceneView(!deletePointMode);
RenderHandles();
}