polygon class

The polygon class is derived from a shape. This class is normally created in a cellView using the dbCreatePoly() function. Note that dbCreatePoly() will create a square or a rectangle if the polygon has 4 points. A polygon is represented by a series of points, which represent the vertices of the polygon. There is an implicit edge between the first and last point.

Rect polygon::bBox()

Get the bounding box of this polygon.

polygon::bBox(Rect b)

Set the bounding box of this polygon. Not useful and will throw an exception if called.

db_Type polygon::objType()

Returns the object type of this polygon as POLYGON.

const char * = polygon::objName()

Returns the object name of this polygon as "POLYGON".

int32_t polygon::nPoints()

Returns the number of points of the polygon's boundary. Note that polygons are not closed as they are in GDS2.

Point * polygon::ptlist()

Returns the point list of this polygon as a C array of Points.

Point polygon::[index]

Returns the Point p at the index into the list of points.

polygon::bias(int32_t bias, float64_t grid)

Bias this polygon by bias, snapping to the grid grid.

p.scale(float64_t scale, float64_t grid)

Scale this polygon by scale, snapping to the grid grid.

int32_t polygon::getNearestEdge(Point p, segment &s)

Get the distance of the nearest segment s of this polygon to the point p;

int32_t polygon::getNearestVertex(Point p, vertex &s)

Get the distance of the nearest vertex s of this polygon to the point p;

bool polygon::ptInPoly(Point p)

Returns true if the point in inside or on the edge of the polygon.

float64_t polygon::area()

Get the area of this polygon.

int32_t polygon::perimeter()

Get the perimeter of this polygon.

polygon::transform(transform trans)

Transform this polygon using trans.

polygon::Move(cellView *cv, Point delta, bool opt = true)

Move this polygon by distance delta. If opt is true then the database is re-optimised for the new polygon position. If there are a lot of objects to move it makes sense to turn this off and instead use the cellView update() function after moving them all.

dbObj *obj = polygon::Copy(cellView *cv, Point delta, int layer = -1)

Copy this polygon to cellView cv, with offset delta. If layerNum is non-negative the polygon will be copied to the new layer number.

dbObj *obj = polygon::Flatten(cellView *cv, transform trans)

Flatten this polygon into cellView cv with transformation trans.

polygon::Stretch(Point delta, segment seg)

Stretch segment seg of this polygon by delta.

polygon::Stretch(Point delta, vertex v)

Stretch vertex v of this polygon by delta.

polygon::compressPoints()

Removes colinear points, sets the point order to be counterclockwise and sets the first point to be the smallest in X and Y.

bool polygon::selfIntersecting()

Returns true if the polygon is self-intersecting.