/// <summary>
/// Splits this solid into two solids by intersecting against a plane.
/// </summary>
/// <param name="plane">The splitting plane</param>
/// <param name="back">The back side of the solid</param>
/// <param name="front">The front side of the solid</param>
/// <param name="generator">The IDGenerator to use</param>
/// <returns>True if the plane splits the solid, false if the plane doesn't intersect</returns>
public bool Split(Plane plane, out Solid back, out Solid front, IDGenerator generator)
{
back = front = null;
// Check that this solid actually spans the plane
var classify = Faces.Select(x => x.ClassifyAgainstPlane(plane)).Distinct().ToList();
if (classify.All(x => x != PlaneClassification.Spanning))
{
if (classify.Any(x => x == PlaneClassification.Back))
{
back = this;
}
else if (classify.Any(x => x == PlaneClassification.Front))
{
front = this;
}
return(false);
}
var backPlanes = new List <Plane> {
plane
};
var frontPlanes = new List <Plane> {
new Plane(-plane.Normal, -plane.DistanceFromOrigin)
};
foreach (var face in Faces)
{
var classification = face.ClassifyAgainstPlane(plane);
if (classification != PlaneClassification.Back)
{
frontPlanes.Add(face.Plane);
}
if (classification != PlaneClassification.Front)
{
backPlanes.Add(face.Plane);
}
}
back = CreateFromIntersectingPlanes(backPlanes, generator);
front = CreateFromIntersectingPlanes(frontPlanes, generator);
CopyBase(back, generator);
CopyBase(front, generator);
front.Faces.Union(back.Faces).ToList().ForEach(x =>
{
x.Texture = Faces[0].Texture.Clone();
x.AlignTextureToFace();
x.Colour = Colour;
});
// Restore textures (match the planes up on each face)
foreach (var orig in Faces)
{
foreach (var face in back.Faces)
{
var classification = face.ClassifyAgainstPlane(orig.Plane);
if (classification != PlaneClassification.OnPlane)
{
continue;
}
face.Texture = orig.Texture.Clone();
break;
}
foreach (var face in front.Faces)
{
var classification = face.ClassifyAgainstPlane(orig.Plane);
if (classification != PlaneClassification.OnPlane)
{
continue;
}
face.Texture = orig.Texture.Clone();
break;
}
}
front.Faces.Union(back.Faces).ToList().ForEach(x => x.CalculateTextureCoordinates(true));
return(true);
}
/// <summary> /// Copies all the values of the provided object into this one, copying children and faces. /// </summary> public abstract void Paste(MapObject o, IDGenerator generator);
public override void Paste(MapObject o, IDGenerator generator)
{
PasteBase(o, generator);
}
/// <summary> /// Creates an exact copy of this object with a new ID. /// </summary> public abstract MapObject Copy(IDGenerator generator);