private void DrawSegments(PathBehaviour pathBehaviour)
{
for (int segmentIndex = 0; segmentIndex < pathBehaviour.NumberOfSegments; ++segmentIndex)
{
var curKnot = pathBehaviour.Knots[segmentIndex % pathBehaviour.Knots.Count];
var nexKnot = pathBehaviour.Knots[(segmentIndex + 1) % pathBehaviour.Knots.Count];
Vector3 start = pathBehaviour.PathSpaceToWorldSpace(curKnot.Position);
Vector3 end = pathBehaviour.PathSpaceToWorldSpace(nexKnot.Position);
Vector3 startControl = pathBehaviour.PathSpaceToWorldSpace(curKnot.OutControlPoint + curKnot.Position);
Vector3 endControl = pathBehaviour.PathSpaceToWorldSpace(nexKnot.InControlPoint + nexKnot.Position);
Handles.DrawBezier(start, end, startControl, endControl, Color.white, null, 2f);
}
}
private bool DrawPointHandles(PathBehaviour pathBehaviour, CubicBezierKnot segment, int index)
{
// Check for changes in the path position.
Vector3 position = pathBehaviour.PathSpaceToWorldSpace(segment.Position);
bool selected = _list.index == index;
bool dirty = false;
// Show a label to indicate which point is which.
string pointName = string.Format("P{0}", index);
Handles.color = Color.gray;
Handles.Label(position + new Vector3(0, HandleUtility.GetHandleSize(position) * 0.3f, 0), pointName);
bool moved = DrawHandle(ref position, position, pathBehaviour, index * 3 + 0, false, "Move Bezier Point", selected);
if (moved)
{
position = pathBehaviour.WorldSpaceToPathSpace(position);
_list.index = index;
// Keep the tangents at relative positions to the bezier point.
segment.Position = position;
dirty = true;
}
if (segment.Type == CubicBezierKnotType.Singular || pathBehaviour.AutoControlPoints)
{
return(dirty);
}
// Check for changes in to the in control point.
Vector3 inControlPoint = pathBehaviour.PathSpaceToWorldSpace(segment.InControlPoint + segment.Position);
Handles.color = selected ? Color.yellow : Color.blue;
Handles.DrawLine(position, inControlPoint);
moved = DrawHandle(ref inControlPoint, position, pathBehaviour, index * 3 + 1, true, "Move Bezier Control Point", selected);
if (moved)
{
inControlPoint = pathBehaviour.WorldSpaceToPathSpace(inControlPoint) - segment.Position;
_list.index = index;
segment.InControlPoint = inControlPoint;
segment.RecalculateControlPoint(true, true);
dirty = true;
}
// Check for changes to the out control point
Vector3 outControlPoint = pathBehaviour.PathSpaceToWorldSpace(segment.OutControlPoint + segment.Position);
Handles.color = selected ? Color.yellow : Color.blue;
Handles.DrawLine(position, outControlPoint);
moved = DrawHandle(ref outControlPoint, position, pathBehaviour, index * 3 + 2, true, "Move Bezier Control Point", selected);
if (moved)
{
outControlPoint = pathBehaviour.WorldSpaceToPathSpace(outControlPoint) - segment.Position;
_list.index = index;
segment.OutControlPoint = outControlPoint;
segment.RecalculateControlPoint(false, true);
dirty = true;
}
return(dirty);
}