/* ---------------------------------------------------------------------------
* removes a polygon-point from a polygon
*/
static void *
RemovePolygonPoint (LayerTypePtr Layer,
PolygonTypePtr Polygon, PointTypePtr Point)
{
Cardinal point_idx;
Cardinal i;
Cardinal contour;
Cardinal contour_start, contour_end, contour_points;
point_idx = polygon_point_idx (Polygon, Point);
contour = polygon_point_contour (Polygon, point_idx);
contour_start = (contour == 0) ? 0 : Polygon->HoleIndex[contour - 1];
contour_end = (contour == Polygon->HoleIndexN) ? Polygon->PointN :
Polygon->HoleIndex[contour];
contour_points = contour_end - contour_start;
if (contour_points <= 3)
return RemovePolygonContour (Layer, Polygon, contour);
if (Layer->On)
ErasePolygon (Polygon);
/* insert the polygon-point into the undo list */
AddObjectToRemovePointUndoList (POLYGONPOINT_TYPE, Layer, Polygon, point_idx);
r_delete_entry (Layer->polygon_tree, (BoxType *) Polygon);
/* remove point from list, keep point order */
for (i = point_idx; i < Polygon->PointN - 1; i++)
Polygon->Points[i] = Polygon->Points[i + 1];
Polygon->PointN--;
/* Shift down indices of any holes */
for (i = 0; i < Polygon->HoleIndexN; i++)
if (Polygon->HoleIndex[i] > point_idx)
Polygon->HoleIndex[i]--;
SetPolygonBoundingBox (Polygon);
r_insert_entry (Layer->polygon_tree, (BoxType *) Polygon, 0);
RemoveExcessPolygonPoints (Layer, Polygon);
InitClip (PCB->Data, Layer, Polygon);
/* redraw polygon if necessary */
if (Layer->On)
{
DrawPolygon (Layer, Polygon);
if (!Bulk)
Draw ();
}
return NULL;
}
/* ---------------------------------------------------------------------------
* inserts a point into a polygon
*/
static void *
InsertPointIntoPolygon (LayerTypePtr Layer, PolygonTypePtr Polygon)
{
PointType save;
Cardinal n;
LineType line;
if (!Forcible)
{
/*
* first make sure adding the point is sensible
*/
line.Thickness = 0;
line.Point1 = Polygon->Points[prev_contour_point (Polygon, InsertAt)];
line.Point2 = Polygon->Points[InsertAt];
if (IsPointOnLine ((float) InsertX, (float) InsertY, 0.0, &line))
return (NULL);
}
/*
* second, shift the points up to make room for the new point
*/
ErasePolygon (Polygon);
r_delete_entry (Layer->polygon_tree, (BoxTypePtr) Polygon);
save = *CreateNewPointInPolygon (Polygon, InsertX, InsertY);
for (n = Polygon->PointN - 1; n > InsertAt; n--)
Polygon->Points[n] = Polygon->Points[n - 1];
/* Shift up indices of any holes */
for (n = 0; n < Polygon->HoleIndexN; n++)
if (Polygon->HoleIndex[n] > InsertAt ||
(InsertLast && Polygon->HoleIndex[n] == InsertAt))
Polygon->HoleIndex[n]++;
Polygon->Points[InsertAt] = save;
SetChangedFlag (true);
AddObjectToInsertPointUndoList (POLYGONPOINT_TYPE, Layer, Polygon,
&Polygon->Points[InsertAt]);
SetPolygonBoundingBox (Polygon);
r_insert_entry (Layer->polygon_tree, (BoxType *) Polygon, 0);
InitClip (PCB->Data, Layer, Polygon);
if (Forcible || !RemoveExcessPolygonPoints (Layer, Polygon))
{
DrawPolygon (Layer, Polygon, 0);
Draw ();
}
return (&Polygon->Points[InsertAt]);
}
/* ---------------------------------------------------------------------------
* moves a polygon-point
*/
static void *
MovePolygonPoint (LayerTypePtr Layer, PolygonTypePtr Polygon,
PointTypePtr Point)
{
if (Layer->On)
{
ErasePolygon (Polygon);
}
r_delete_entry (Layer->polygon_tree, (BoxType *)Polygon);
MOVE (Point->X, Point->Y, DeltaX, DeltaY);
SetPolygonBoundingBox (Polygon);
r_insert_entry (Layer->polygon_tree, (BoxType *)Polygon, 0);
RemoveExcessPolygonPoints (Layer, Polygon);
InitClip (PCB->Data, Layer, Polygon);
if (Layer->On)
{
DrawPolygon (Layer, Polygon);
Draw ();
}
return (Point);
}
