API reference - Class DVector
Notation used in Ruby API documentation
Description: A vector class with double (floating-point) coordinates
- Public constructors
- Public methods
- Public static methods and constants
- Deprecated methods (protected, public, static, non-static and constructors)
- Detailed description
A vector is a distance in cartesian, 2 dimensional space. A vector is given by two coordinates (x and y) and represents the distance between two points. Being the distance, transformations act differently on vectors: the displacement is not applied. Vectors are not geometrical objects by itself. But they are frequently used in the database API for various purposes. Other than the integer variant (Vector), points with floating-point coordinates can represent fractions of a database unit or vectors in physical (micron) units.
This class has been introduced in version 0.25.
See The Database API for more details about the database objects.
Public constructors
| new DVector ptr | new | (const Vector vector) | Creates a floating-point coordinate vector from an integer coordinate vector |
| new DVector ptr | new | Default constructor: creates a null vector with coordinates (0,0) | |
| new DVector ptr | new | (const DPoint p) | Default constructor: creates a vector from a point |
| new DVector ptr | new | (double x, double y) | Constructor for a vector from two coordinate values |
Public methods
| [const] | bool | != | (const DVector v) | Inequality test operator |
| [const] | DVector | * | (double f) | Scaling by some factor |
| [const] | DVector | + | (const DVector v) | Adds two vectors |
| [const] | DPoint | + | (const DPoint p) | Adds a vector and a point |
| [const] | DVector | - | (const DVector v) | Subtract two vectors |
| [const] | DVector | -@ | (p) | Compute the negative of a vector |
| [const] | bool | < | (const DVector v) | "less" comparison operator |
| [const] | bool | == | (const DVector v) | Equality test operator |
| 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 | abs | Returns the length of the vector | |
| void | assign | (const DVector other) | Assigns another object to self | |
| [const] | new DVector ptr | dup | Creates a copy of self | |
| [const] | unsigned long | hash | Computes a hash value | |
| [const] | double | length | Returns the length of the vector | |
| [const] | double | sprod | (const DVector v) | Computes the scalar product between self and the given vector |
| [const] | int | sprod_sign | (const DVector v) | Computes the scalar product between self and the given vector and returns a value indicating the sign of the product |
| [const] | double | sq_abs | The square length of the vector | |
| [const] | double | sq_length | The square length of the vector | |
| [const] | Vector | to_itype | (double dbu = 1) | Converts the point to an integer coordinate point |
| [const] | DPoint | to_p | Turns the vector into a point | |
| [const] | string | to_s | String conversion | |
| [const] | double | vprod | (const DVector v) | Computes the vector product between self and the given vector |
| [const] | int | vprod_sign | (const DVector v) | Computes the vector product between self and the given vector and returns a value indicating the sign of the product |
| [const] | double | x | Accessor to the x coordinate | |
| void | x= | (double coord) | Write accessor to the x coordinate | |
| [const] | double | y | Accessor to the y coordinate | |
| void | y= | (double coord) | Write accessor to the y coordinate |
Public static methods and constants
| new DVector ptr | from_s | (string s) | Creates an object from a string |
Deprecated methods (protected, public, static, non-static and constructors)
| 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 | |
| [const] | bool | is_const_object? | Use of this method is deprecated. Use _is_const_object? instead |
Detailed description
!= | Signature: [const] bool != (const DVector v) Description: Inequality test operator | ||
* | Signature: [const] DVector * (double f) Description: Scaling by some factor Returns the scaled object. All coordinates are multiplied with the given factor and if necessary rounded. | ||
+ | Signature: [const] DVector + (const DVector v) Description: Adds two vectors Adds vector v to self by adding the coordinates. | ||
Signature: [const] DPoint + (const DPoint p) Description: Adds a vector and a point Returns the point p shifted by the vector. | |||
- | Signature: [const] DVector - (const DVector v) Description: Subtract two vectors Subtract vector v from self by subtracting the coordinates. | ||
-@ | Signature: [const] DVector -@ (p) Description: Compute the negative of a vector Returns a new vector with -x,-y. | ||
< | Signature: [const] bool < (const DVector v) Description: "less" comparison operator This operator is provided to establish a sorting order | ||
== | Signature: [const] bool == (const DVector v) Description: Equality test operator | ||
_create | Signature: void _create Description: Ensures the C++ object is created 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 | Signature: void _destroy Description: Explicitly destroys the object 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? | Signature: [const] bool _destroyed? Description: Returns a value indicating whether the object was already 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? | Signature: [const] bool _is_const_object? Description: Returns a value indicating whether the reference is a const reference This method returns true, if self is a const reference. In that case, only const methods may be called on self. | ||
_manage | Signature: void _manage Description: Marks the object as managed by the script side. 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 | Signature: void _unmanage Description: Marks the object as no longer owned by the script side. 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. | ||
abs | Signature: [const] double abs Description: Returns the length of the vector 'abs' is an alias provided for compatibility with the former point type. | ||
assign | Signature: void assign (const DVector other) Description: Assigns another object to self | ||
create | Signature: void create Description: Ensures the C++ object is created Use of this method is deprecated. Use _create instead | ||
destroy | Signature: void destroy Description: Explicitly destroys the object Use of this method is deprecated. Use _destroy instead | ||
destroyed? | Signature: [const] bool destroyed? Description: Returns a value indicating whether the object was already destroyed Use of this method is deprecated. Use _destroyed? instead | ||
dup | Signature: [const] new DVector ptr dup Description: Creates a copy of self | ||
from_s | Signature: [static] new DVector ptr from_s (string s) Description: Creates an object from a string Creates the object from a string representation (as returned by to_s) | ||
hash | Signature: [const] unsigned long hash Description: Computes a hash value Returns a hash value for the given vector. This method enables vectors as hash keys. This method has been introduced in version 0.25. Python specific notes: | ||
is_const_object? | Signature: [const] bool is_const_object? Description: Returns a value indicating whether the reference is a const reference Use of this method is deprecated. Use _is_const_object? instead | ||
length | Signature: [const] double length Description: Returns the length of the vector 'abs' is an alias provided for compatibility with the former point type. | ||
new | Signature: [static] new DVector ptr new (const Vector vector) Description: Creates a floating-point coordinate vector from an integer coordinate vector Python specific notes: | ||
Signature: [static] new DVector ptr new Description: Default constructor: creates a null vector with coordinates (0,0) Python specific notes: | |||
Signature: [static] new DVector ptr new (const DPoint p) Description: Default constructor: creates a vector from a point This constructor is equivalent to computing p-point(0,0). This method has been introduced in version 0.25. Python specific notes: | |||
Signature: [static] new DVector ptr new (double x,double y) Description: Constructor for a vector from two coordinate values Python specific notes: | |||
sprod | Signature: [const] double sprod (const DVector v) Description: Computes the scalar product between self and the given vector The scalar product of a and b is defined as: vp = ax*bx+ay*by. | ||
sprod_sign | Signature: [const] int sprod_sign (const DVector v) Description: Computes the scalar product between self and the given vector and returns a value indicating the sign of the product
| ||
sq_abs | Signature: [const] double sq_abs Description: The square length of the vector 'sq_abs' is an alias provided for compatibility with the former point type. | ||
sq_length | Signature: [const] double sq_length Description: The square length of the vector 'sq_abs' is an alias provided for compatibility with the former point type. | ||
to_itype | Signature: [const] Vector to_itype (double dbu = 1) Description: Converts the point to an integer coordinate point The database unit can be specified to translate the floating-point coordinate vector in micron units to an integer-coordinate vector in database units. The vector's' coordinates will be divided by the database unit. | ||
to_p | Signature: [const] DPoint to_p Description: Turns the vector into a point This method returns the point resulting from adding the vector to (0,0). This method has been introduced in version 0.25. | ||
to_s | Signature: [const] string to_s Description: String conversion Python specific notes: | ||
vprod | Signature: [const] double vprod (const DVector v) Description: Computes the vector product between self and the given vector The vector product of a and b is defined as: vp = ax*by-ay*bx. | ||
vprod_sign | Signature: [const] int vprod_sign (const DVector v) Description: Computes the vector product between self and the given vector and returns a value indicating the sign of the product
| ||
x | Signature: [const] double x Description: Accessor to the x coordinate Python specific notes: | ||
x= | Signature: void x= (double coord) Description: Write accessor to the x coordinate Python specific notes: | ||
y | Signature: [const] double y Description: Accessor to the y coordinate Python specific notes: | ||
y= | Signature: void y= (double coord) Description: Write accessor to the y coordinate Python specific notes: |