/// <summary>
/// Checks if gameObject is a LineSketchObject, then deletes control points of this LineSketchObject within radius
/// </summary>
/// <param name="gameObject">LineSketchObject of which control points should be deleted.</param>
/// <param name="point">Point in world space.</param>
/// <param name="radius">Radius in world space.</param>
public static void DeleteControlPoints(GameObject gameObject, Vector3 point, float radius)
{
StrokeSketchObject stroke = gameObject.GetComponent <StrokeSketchObject>();
//When there is only one control point, a sphere that is a child of the LineSketchObject is shown
//This code checks if this child sphere of a LineSketchObject was collided with
if (stroke == null && gameObject.GetComponent <SphereCollider>() && gameObject.transform.parent.GetComponent <StrokeSketchObject>())
{
stroke = gameObject.transform.parent.GetComponent <StrokeSketchObject>();
}
stroke?.DeleteControlPoints(point, radius, out List <StrokeSketchObject> newLines);
}
/// <summary>
/// Delete the control points of this line that are within the radius around point.
/// </summary>
/// <param name="point">Point in world space.</param>
/// <param name="radius">Radius in world space.</param>
/// <param name="newStrokeSketchObjects">List of new line sketch objects that were created for the deletion.</param>
/// <returns>Returns true if at least one control point was deleted, false otherwise.</returns>
internal bool DeleteControlPoints(Vector3 point, float radius, out List <StrokeSketchObject> newStrokeSketchObjects)
{
List <List <Vector3> > contiguousSections = new List <List <Vector3> >();
List <Vector3> contiguousSection = new List <Vector3>();
//find contiguous sections of control points that are not in the radius
foreach (Vector3 controlPoint in GetControlPoints())
{
if (!IsInRadius(controlPoint, this.transform.InverseTransformPoint(point), radius / this.transform.lossyScale.x))
{
contiguousSection.Add(controlPoint);
}
else
{
if (contiguousSection.Count > 0)
{
contiguousSections.Add(contiguousSection);
contiguousSection = new List <Vector3>();
}
}
}
if (contiguousSection.Count > 0)
{
contiguousSections.Add(contiguousSection);
}
newStrokeSketchObjects = new List <StrokeSketchObject>();
//create lines from the sections
if (contiguousSections.Count > 0)
{
if (contiguousSections.Count == 1 && contiguousSections[0].Count == this.getNumberOfControlPoints())
{
//if this is the case, no control points were deleted and the line stays unchanged
return(false);
}
//this line becomes the first section
this.SetControlPointsLocalSpace(contiguousSections[0]);
contiguousSections.RemoveAt(0);
//create new lines for each additional section
foreach (List <Vector3> section in contiguousSections)
{
StrokeSketchObject newStroke = Instantiate(this, this.transform.parent);
this.SplineMesh.GetCrossSectionShape(out List <Vector3> crossSectionVertices, out List <Vector3> crossSectionNormals);
newStroke.SetStrokeCrossSection(crossSectionVertices, crossSectionNormals, this.lineDiameter);
newStroke.SetInterpolationSteps(this.InterpolationSteps);
newStroke.SetControlPointsLocalSpace(section);
newStrokeSketchObjects.Add(newStroke);
}
}
else
{
if (SketchWorld.ActiveSketchWorld)
{
SketchWorld.ActiveSketchWorld.DeleteObject(this);
}
else
{
Destroy(this.gameObject);
}
}
return(true);
}
