Method CmEditAdd

roomedit/source/editcli.cpp:4035–4276

//////////////////////////////////////////////////////////////// TEditorClient ------------- Insert an object at pointer location

// -------------
//   Insert an object at pointer location
void TEditorClient::CmEditAdd ()
{
	// Ignore if "insert object" mode
	if ( InsertingObject )
		return;

	SET_HELP_CONTEXT(Add_object);

	SelPtr cur;

	// first special case: if several Vertices are selected, add new LineDefs
	if (EditMode == OBJ_VERTEXES && Selected != NULL && Selected->next != NULL)
	{
		// UNDO
		StartUndoRecording("Add LineDefs");

		SHORT firstv;

		if (Selected->next->next != NULL)		firstv = Selected->objnum;
		else                             		firstv = -1;

		// create LineDefs between the Vertices
		for (cur = Selected; cur->next != NULL; cur = cur->next)
		{

			// check if there is already a LineDef between the two Vertices
			for (CurObject = 0; CurObject < NumLineDefs; CurObject++)
			{
				LineDef *pCurLineDef = &LineDefs[CurObject];
				SHORT start = pCurLineDef->start;
				SHORT end   = pCurLineDef->end;

				if ( (start == cur->next->objnum && end   == cur->objnum) ||
					 (end   == cur->next->objnum && start == cur->objnum) )
					break;
			}

			// If no LineDef, add one
			if (CurObject >= NumLineDefs)
			{
				InsertObject (OBJ_LINEDEFS, -1, 0, 0);
				CurObject = NumLineDefs - 1;
				LineDefs[CurObject].start = cur->next->objnum;
				LineDefs[CurObject].end   = cur->objnum;
			}
			cur->objnum = CurObject;
		}

		// If SHIFT key pressed and if there are more than 2 Vertices,
		// close the polygon
		if (firstv >= 0 && (GetAsyncKeyState(VK_SHIFT) & 0x8000))
		{
			// check if there is already a LineDef between the two Vertices
			for (CurObject = 0; CurObject < NumLineDefs; CurObject++)
			{
				LineDef *pCurLineDef = &LineDefs[CurObject];
				SHORT start = pCurLineDef->start;
				SHORT end   = pCurLineDef->end;