private static void LayoutSelectionHandles(PathMovementProxy path)
{
for (int i = 0; i < path.NumPoints; ++i)
{
PathMovementProxy.Point p = path[i];
if (!p.makeSmoothTangent)
{
Handles.CubeHandleCap(
p.controlId,
p.position,
Quaternion.identity,
.3f,
EventType.Layout);
}
else
{
Handles.SphereHandleCap(
p.controlId,
p.position,
Quaternion.identity,
.3f,
EventType.Layout);
}
}
}
private static void DrawSelectionHandles(PathMovementProxy path)
{
for (int i = 0; i < path.NumPoints; ++i)
{
PathMovementProxy.Point p = path[i];
Handles.color = p.isSelected ? Color.blue : Color.white;
if (!p.makeSmoothTangent)
{
Handles.CubeHandleCap(
p.controlId,
p.position,
Quaternion.identity,
.3f,
EventType.Repaint);
}
else
{
Handles.SphereHandleCap(
p.controlId,
p.position,
Quaternion.identity,
.3f,
EventType.Repaint);
}
}
}
private static void MovePoint(PathMovementProxy.Point pt, Vector3 offset)
{
pt.position += offset;
pt.inTangent += offset;
pt.outTangent += offset;
}
private static void UpdatePoint(PathMovementProxy path, int idx, bool lockTangentLength)
{
PathMovementProxy.Point p = path[idx];
Vector3 newPoint;
// update inTangent
if ((path.HasLoop && path.loopIndex == 0) || idx > 0)
{
EditorGUI.BeginChangeCheck();
newPoint = Handles.PositionHandle(p.inTangent, Quaternion.identity);
if (EditorGUI.EndChangeCheck())
{
Undo.RecordObject(path, "Move In Tangent " + idx);
EditorUtility.SetDirty(path);
if (!lockTangentLength)
{
p.inTangent = newPoint;
}
// lock distance
else
{
Vector3 direction = (newPoint - p.position);
direction.Normalize();
direction *= (p.inTangent - p.position).magnitude;
p.inTangent = p.position + direction;
}
// make all 3 points colinear
if (p.makeSmoothTangent)
{
p.outTangent = AlignPoints(p.inTangent,
p.position, p.outTangent);
}
}
}
// update outTangent
if (path.HasLoop || idx < path.points.Count - 1)
{
EditorGUI.BeginChangeCheck();
newPoint = Handles.PositionHandle(p.outTangent, Quaternion.identity);
if (EditorGUI.EndChangeCheck())
{
Undo.RecordObject(path, "Move Out Tangent " + idx);
EditorUtility.SetDirty(path);
if (!lockTangentLength)
{
p.outTangent = newPoint;
}
// lock distance
else
{
Vector3 direction = (newPoint - p.position);
direction.Normalize();
direction *= (p.outTangent - p.position).magnitude;
p.outTangent = p.position + direction;
}
// make all 3 points colinear
if (p.makeSmoothTangent)
{
p.inTangent = AlignPoints(p.outTangent,
p.position, p.inTangent);
}
}
}
// update position
EditorGUI.BeginChangeCheck();
newPoint = Handles.PositionHandle(p.position, Quaternion.identity);
if (EditorGUI.EndChangeCheck())
{
Undo.RecordObject(path, "Move Point " + idx);
EditorUtility.SetDirty(path);
// move all selected points
Vector3 diff = newPoint - p.position;
foreach (PathMovementProxy.Point point in path.points)
{
if (point.isSelected)
{
MovePoint(point, diff);
}
}
}
}
