private void DrawMoveAllHandle(AreaPolygon areaPolygon)
{
Handles.color = Color.white;
var newPosition = Handles.FreeMoveHandle(
areaPolygon.transform.position,
Quaternion.identity,
0.5f,
Vector3.zero,
Handles.DotCap
);
newPosition.y = 0;
if (newPosition != areaPolygon.transform.position)
{
var delta = newPosition - areaPolygon.transform.position;
Undo.RecordObject(areaPolygon, "moved polygon");
areaPolygon.transform.position = newPosition;
for (var index = 0; index < areaPolygon.points.Length; index++)
{
areaPolygon.points[index] += delta;
}
areaPolygon.RecalculateBoundaries();
EditorUtility.SetDirty(areaPolygon);
return;
}
}
/// <summary>
/// Draws the handles used for adding new points to the polygon.
/// </summary>
/// <param name="areaPolygon">
/// The current <see cref="T:AreaPolygon"/> being edited.
/// </param>
private void DrawAddHandles(AreaPolygon areaPolygon)
{
var length = areaPolygon.points.Length;
Handles.color = Color.green;
for (var index = 0; index < length - 1; index++)
{
var n = (index + 1) % length;
var p1 = areaPolygon.points[index];
var p2 = areaPolygon.points[n];
var mid = (p1 + p2) * 0.5f;
if (Handles.Button(mid, Quaternion.identity, 0.1f, 0.5f, Handles.DotCap))
{
Undo.RecordObject(areaPolygon, "added point");
areaPolygon.points = areaPolygon.points.Insert(n, mid);
areaPolygon.RecalculateBoundaries();
EditorUtility.SetDirty(areaPolygon);
break;
}
}
}
/// <summary>
/// Draws the handles used for moving points on the polygon.
/// </summary>
/// <param name="areaPolygon">
/// The current <see cref="T:AreaPolygon"/> being edited.
/// </param>
private void DrawMoveHandles(AreaPolygon areaPolygon)
{
Handles.color = Color.white;
for (var index = 0; index < areaPolygon.points.Length - 1; index++)
{
var point = areaPolygon.points[index];
var newPoint = Handles.FreeMoveHandle(
point,
Quaternion.identity,
0.25f,
Vector3.zero,
Handles.DotCap
);
newPoint.y = 0;
if (newPoint != point)
{
Undo.RecordObject(areaPolygon, "moved point");
areaPolygon.points[index] = newPoint;
if (index == 0)
{
areaPolygon.points[areaPolygon.points.Length - 1] = newPoint;
}
areaPolygon.RecalculateBoundaries();
EditorUtility.SetDirty(areaPolygon);
return;
}
}
}
/// <summary>
/// Draws the handles used for removing existing points from the polygon.
/// </summary>
/// <param name="areaPolygon">
/// The current <see cref="T:AreaPolygon"/> being edited.
/// </param>
private void DrawRemoveHandles(AreaPolygon areaPolygon)
{
if (areaPolygon.points.Length < 5)
{
return;
}
Handles.color = Color.red;
for (var index = 0; index < areaPolygon.points.Length - 1; index++)
{
if (Handles.Button(areaPolygon.points[index], Quaternion.identity, 0.25f, 1.0f, Handles.DotCap))
{
Undo.RecordObject(areaPolygon, "removed point");
areaPolygon.points = areaPolygon.points.Remove(index);
if (index == 0)
{
areaPolygon.points[areaPolygon.points.Length - 1] = areaPolygon.points[0];
}
areaPolygon.RecalculateBoundaries();
EditorUtility.SetDirty(areaPolygon);
break;
}
}
}
