Notation used in Ruby API documentation

**Module**: db

**Description**: A simple polygon class

- Public constructors
- Public methods
- Public static methods and constants
- Deprecated methods (protected, public, static, non-static and constructors)
- Detailed description

A simple polygon consists of an outer hull only. To support polygons with holes, use DPolygon. The contour consists of several points. The point list is normalized such that the leftmost, lowest point is the first one. The orientation is normalized such that the orientation of the hull contour is clockwise.

It is in no way checked that the contours are not over- lapping. This must be ensured by the user of the object when filling the contours.

The DSimplePolygon class stores coordinates in floating-point format which gives a higher precision for some operations. A class that stores integer coordinates is SimplePolygon.

See The Database API for more details about the database objects.

new DSimplePolygon ptr | new | (const SimplePolygon polygon) | Creates a floating-point coordinate polygon from an integer coordinate polygon |

new DSimplePolygon ptr | new | Default constructor: creates an empty (invalid) polygon | |

new DSimplePolygon ptr | new | (DPoint[] pts, bool raw = false) | Constructor given the points of the simple polygon |

new DSimplePolygon ptr | new | (const DBox box) | Constructor converting a box to a polygon |

[const] | bool | != | (const DSimplePolygon p) | Returns a value indicating whether self is not equal to p |

[const] | DSimplePolygon | * | (double f) | Scales the polygon by some factor |

[const] | bool | < | (const DSimplePolygon p) | Returns a value indicating whether self is less than p |

[const] | bool | == | (const DSimplePolygon p) | Returns a value indicating whether self is equal to p |

void | _create | Ensures the C++ object is created | ||

void | _destroy | Explicitly destroys the object | ||

[const] | bool | _destroyed? | Returns a value indicating whether the object was already destroyed | |

[const] | bool | _is_const_object? | Returns a value indicating whether the reference is a const reference | |

void | _manage | Marks the object as managed by the script side. | ||

void | _unmanage | Marks the object as no longer owned by the script side. | ||

[const] | double | area | Gets the area of the polygon | |

[const] | double | area2 | Gets the double area of the polygon | |

void | assign | (const DSimplePolygon other) | Assigns another object to self | |

[const] | DBox | bbox | Returns the bounding box of the simple polygon | |

void | compress | (bool remove_reflected) | Compressed the simple polygon. | |

[const] | new DSimplePolygon ptr | dup | Creates a copy of self | |

[const,iter] | DEdge | each_edge | Iterates over the edges that make up the simple polygon | |

[const,iter] | DPoint | each_point | Iterates over the points that make up the simple polygon | |

[const] | variant[] | extract_rad | Extracts the corner radii from a rounded polygon | |

[const] | unsigned long | hash | Computes a hash value | |

[const] | bool | inside? | (DPoint p) | Gets a value indicating whether the given point is inside the polygon |

[const] | bool | is_box? | Returns a value indicating whether the polygon is a simple box. | |

bool | is_empty? | Returns a value indicating whether the polygon is empty | ||

[const] | bool | is_halfmanhattan? | Returns a value indicating whether the polygon is half-manhattan | |

[const] | bool | is_rectilinear? | Returns a value indicating whether the polygon is rectilinear | |

DSimplePolygon | move | (const DVector p) | Moves the simple polygon. | |

DSimplePolygon | move | (double x, double y) | Moves the polygon. | |

[const] | DSimplePolygon | moved | (const DVector p) | Returns the moved simple polygon |

[const] | DSimplePolygon | moved | (double x, double y) | Returns the moved polygon (does not modify self) |

unsigned long | num_points | Gets the number of points | ||

[const] | double | perimeter | Gets the perimeter of the polygon | |

DPoint | point | (unsigned long p) | Gets a specific point of the contour@param p The index of the point to get | |

void | points= | (DPoint[] pts) | Sets the points of the simple polygon | |

[const] | DSimplePolygon | round_corners | (double rinner, double router, unsigned int n) | Rounds the corners of the polygon |

void | set_points | (DPoint[] pts, bool raw = false) | Sets the points of the simple polygon | |

[const] | DSimplePolygon[] | split | Splits the polygon into two or more parts | |

[const] | SimplePolygon | to_itype | (double dbu = 1) | Converts the polygon to an integer coordinate polygon |

[const] | string | to_s | Returns a string representing the polygon | |

[const] | bool | touches? | (const DBox box) | Returns true, if the polygon touches the given box. |

[const] | bool | touches? | (const DEdge edge) | Returns true, if the polygon touches the given edge. |

[const] | bool | touches? | (const DPolygon polygon) | Returns true, if the polygon touches the other polygon. |

[const] | bool | touches? | (const DSimplePolygon simple_polygon) | Returns true, if the polygon touches the other polygon. |

DSimplePolygon ptr | transform | (const DCplxTrans t) | Transforms the simple polygon with a complex transformation (in-place) | |

DSimplePolygon ptr | transform | (const DTrans t) | Transforms the simple polygon (in-place) | |

[const] | SimplePolygon | transformed | (const VCplxTrans t) | Transforms the polygon with the given complex transformation |

[const] | DSimplePolygon | transformed | (const DTrans t) | Transforms the simple polygon. |

[const] | DSimplePolygon | transformed | (const DCplxTrans t) | Transforms the simple polygon. |

new DSimplePolygon ptr | ellipse | (const DBox box, int n) | Creates a simple polygon approximating an ellipse | |

new DSimplePolygon ptr | from_s | (string s) | Creates an object from a string |

void | create | Use of this method is deprecated. Use _create instead | ||

void | destroy | Use of this method is deprecated. Use _destroy instead | ||

[const] | bool | destroyed? | Use of this method is deprecated. Use _destroyed? instead | |

[static] | new DSimplePolygon ptr | from_ipoly | (const SimplePolygon polygon) | Use of this method is deprecated. Use new instead |

[const] | bool | is_const_object? | Use of this method is deprecated. Use _is_const_object? instead | |

[const] | DSimplePolygon | transformed_cplx | (const DCplxTrans t) | Use of this method is deprecated. Use transformed instead |

## != |
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## * |
Returns the scaled object. All coordinates are multiplied with the given factor and if necessary rounded.
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## < |
This operator is provided to establish some, not necessarily a certain sorting order This method has been introduced in version 0.25. | ||||||||

## == |
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## _create |
Use this method to ensure the C++ object is created, for example to ensure that resources are allocated. Usually C++ objects are created on demand and not necessarily when the script object is created. | ||||||||

## _destroy |
Explicitly destroys the object on C++ side if it was owned by the script interpreter. Subsequent access to this object will throw an exception. If the object is not owned by the script, this method will do nothing. | ||||||||

## _destroyed? |
This method returns true, if the object was destroyed, either explicitly or by the C++ side. The latter may happen, if the object is owned by a C++ object which got destroyed itself. | ||||||||

## _is_const_object? |
This method returns true, if self is a const reference. In that case, only const methods may be called on self. | ||||||||

## _manage |
After calling this method on an object, the script side will be responsible for the management of the object. This method may be called if an object is returned from a C++ function and the object is known not to be owned by any C++ instance. If necessary, the script side may delete the object if the script's reference is no longer required. Usually it's not required to call this method. It has been introduced in version 0.24. | ||||||||

## _unmanage |
Calling this method will make this object no longer owned by the script's memory management. Instead, the object must be managed in some other way. Usually this method may be called if it is known that some C++ object holds and manages this object. Technically speaking, this method will turn the script's reference into a weak reference. After the script engine decides to delete the reference, the object itself will still exist. If the object is not managed otherwise, memory leaks will occur. Usually it's not required to call this method. It has been introduced in version 0.24. | ||||||||

## area |
The area is correct only if the polygon is not self-overlapping and the polygon is oriented clockwise. | ||||||||

## area2 |
This method is provided because the area for an integer-type polygon is a multiple of 1/2. Hence the double area can be expresses precisely as an integer for these types. This method has been introduced in version 0.26.1 | ||||||||

## assign |
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## bbox |
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## compress |
This method removes redundant points from the polygon, such as points being on a line formed by two other points. If remove_reflected is true, points are also removed if the two adjacent edges form a spike. This method was introduced in version 0.18. | ||||||||

## create |
Use of this method is deprecated. Use _create instead Use this method to ensure the C++ object is created, for example to ensure that resources are allocated. Usually C++ objects are created on demand and not necessarily when the script object is created. | ||||||||

## destroy |
Use of this method is deprecated. Use _destroy instead Explicitly destroys the object on C++ side if it was owned by the script interpreter. Subsequent access to this object will throw an exception. If the object is not owned by the script, this method will do nothing. | ||||||||

## destroyed? |
Use of this method is deprecated. Use _destroyed? instead This method returns true, if the object was destroyed, either explicitly or by the C++ side. The latter may happen, if the object is owned by a C++ object which got destroyed itself. | ||||||||

## dup |
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## each_edge |
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## each_point |
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## ellipse |
This method has been introduced in version 0.23. | ||||||||

## extract_rad |
Attempts to extract the radii of rounded corner polygon. This is essentially the inverse of the round_corners method. If this method succeeds, if will return an array of four elements: - The polygon with the rounded corners replaced by edgy ones
- The radius of the inner corners
- The radius of the outer corners
- The number of points per full circle
This method is based on some assumptions and may fail. In this case, an empty array is returned. If successful, the following code will more or less render the original polygon and parameters p = ... # some polygon p.round_corners(ri, ro, n) (p2, ri2, ro2, n2) = p.extract_rad # -> p2 == p, ro2 == ro, ri2 == ri, n2 == n (within some limits) This method was introduced in version 0.25. | ||||||||

## from_ipoly |
Use of this method is deprecated. Use new instead This constructor has been introduced in version 0.25 and replaces the previous static method 'from_ipoly'.
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## from_s |
Creates the object from a string representation (as returned by to_s) This method has been added in version 0.23. | ||||||||

## hash |
Returns a hash value for the given polygon. This method enables polygons as hash keys. This method has been introduced in version 0.25.
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## inside? |
If the given point is inside or on the edge the polygon, true is returned. This tests works well only if the polygon is not self-overlapping and oriented clockwise. | ||||||||

## is_box? |
A polygon is a box if it is identical to its bounding box. This method was introduced in version 0.23. | ||||||||

## is_const_object? |
Use of this method is deprecated. Use _is_const_object? instead This method returns true, if self is a const reference. In that case, only const methods may be called on self. | ||||||||

## is_empty? |
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## is_halfmanhattan? |
Half-manhattan polygons have edges which are multiples of 45 degree. These polygons can be clipped at a rectangle without potential grid snapping. This predicate was introduced in version 0.27. | ||||||||

## is_rectilinear? |
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## move |
Moves the simple polygon by the given offset and returns the moved simple polygon. The polygon is overwritten. | ||||||||

Moves the polygon by the given offset and returns the moved polygon. The polygon is overwritten. | |||||||||

## moved |
Moves the simple polygon by the given offset and returns the moved simple polygon. The polygon is not modified. | ||||||||

Moves the polygon by the given offset and returns the moved polygon. The polygon is not modified. This method has been introduced in version 0.23. | |||||||||

## new |
This constructor has been introduced in version 0.25 and replaces the previous static method 'from_ipoly'.
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If the 'raw' argument is set to true, the points are taken as they are. Specifically no removal of redundant points or joining of coincident edges will take place. In effect, polygons consisting of a single point or two points can be constructed as well as polygons with duplicate points. Note that such polygons may cause problems in some applications. Regardless of raw mode, the point list will be adjusted such that the first point is the lowest-leftmost one and the orientation is clockwise always. The 'raw' argument has been added in version 0.24.
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## num_points |
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## perimeter |
The perimeter is sum of the lengths of all edges making up the polygon. | ||||||||

## point |
If the index of the point is not a valid index, a default value is returned. This method was introduced in version 0.18. | ||||||||

## points= |
See the constructor description for details about raw mode.
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## round_corners |
Replaces the corners of the polygon with circle segments. This method was introduced in version 0.22 for integer coordinates and in 0.25 for all coordinate types. | ||||||||

## set_points |
See the constructor description for details about raw mode. This method has been added in version 0.24. | ||||||||

## split |
This method will break the polygon into parts. The exact breaking algorithm is unspecified, the result are smaller polygons of roughly equal number of points and 'less concave' nature. Usually the returned polygon set consists of two polygons, but there can be more. The merged region of the resulting polygons equals the original polygon with the exception of small snapping effects at new vertexes. The intended use for this method is a iteratively split polygons until the satisfy some maximum number of points limit. This method has been introduced in version 0.25.3. | ||||||||

## to_itype |
The database unit can be specified to translate the floating-point coordinate polygon in micron units to an integer-coordinate polygon in database units. The polygon's' coordinates will be divided by the database unit. This method has been introduced in version 0.25. | ||||||||

## to_s |
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## touches? |
The box and the polygon touch if they overlap or their contours share at least one point. This method was introduced in version 0.25.1. | ||||||||

The edge and the polygon touch if they overlap or the edge shares at least one point with the polygon's contour. This method was introduced in version 0.25.1. | |||||||||

The polygons touch if they overlap or their contours share at least one point. This method was introduced in version 0.25.1. | |||||||||

The polygons touch if they overlap or their contours share at least one point. This method was introduced in version 0.25.1. | |||||||||

## transform |
Transforms the simple polygon with the given complex transformation. Modifies self and returns self. An out-of-place version which does not modify self is transformed. This method has been introduced in version 0.24. | ||||||||

Transforms the simple polygon with the given transformation. Modifies self and returns self. An out-of-place version which does not modify self is transformed. This method has been introduced in version 0.24. | |||||||||

## transformed |
This method has been introduced in version 0.25. | ||||||||

Transforms the simple polygon with the given transformation. Does not modify the simple polygon but returns the transformed polygon. | |||||||||

Transforms the simple polygon with the given complex transformation. Does not modify the simple polygon but returns the transformed polygon. With version 0.25, the original 'transformed_cplx' method is deprecated and 'transformed' takes both simple and complex transformations. | |||||||||

## transformed_cplx |
Use of this method is deprecated. Use transformed instead Transforms the simple polygon with the given complex transformation. Does not modify the simple polygon but returns the transformed polygon. With version 0.25, the original 'transformed_cplx' method is deprecated and 'transformed' takes both simple and complex transformations. |