// This changes sidedefs (used for joining lines)
// target: The linedef on which to remove or create a new sidedef
// front: Side on which to remove or create the sidedef (true for front side)
// newside: The side from which to copy the properties to the new sidedef.
// If this is null, no sidedef will be created (only removed)
// Returns false when the operation could not be completed.
private bool JoinChangeSidedefs(Linedef target, bool front, Sidedef newside)
{
// Change sidedefs
if (front)
{
if (target.front != null)
{
target.front.Dispose();
}
}
else
{
if (target.back != null)
{
target.back.Dispose();
}
}
if (newside != null)
{
Sidedef sd = map.CreateSidedef(target, front, newside.Sector);
if (sd == null)
{
return(false);
}
newside.CopyPropertiesTo(sd);
sd.Marked = newside.Marked;
}
return(true);
}
// This splits this line by vertex v
// Returns the new line resulting from the split, or null when it failed
public Linedef Split(Vertex v)
{
// Copy linedef and change vertices
Linedef nl = map.CreateLinedef(v, end);
if (nl == null)
{
return(null);
}
CopyPropertiesTo(nl);
SetEndVertex(v);
nl.Selected = this.Selected;
nl.marked = this.marked;
// Copy front wall if exists
if (front != null)
{
Sidedef nsd = map.CreateSidedef(nl, true, front.Sector);
if (nsd == null)
{
return(null);
}
front.CopyPropertiesTo(nsd);
nsd.Marked = front.Marked;
// Make texture offset adjustments
//TODO: works differently in Build...
nsd.OffsetX += (int)Vector2D.Distance(this.start.Position, this.end.Position);
}
// Copy back wall if exists
if (back != null)
{
Sidedef nsd = map.CreateSidedef(nl, false, back.Sector);
if (nsd == null)
{
return(null);
}
back.CopyPropertiesTo(nsd);
nsd.Marked = back.Marked;
// Make texture offset adjustments
//TODO: works differently in Build...
back.OffsetX += (int)Vector2D.Distance(nl.start.Position, nl.end.Position);
}
// Return result
General.Map.IsChanged = true;
return(nl);
}