org.jacop.constraints.diffn

Class Diffn

java.lang.Object

org.jacop.constraints.DecomposedConstraint<Constraint>

org.jacop.constraints.Constraint

org.jacop.constraints.diffn.Nooverlap

org.jacop.constraints.diffn.Diffn

public class Diffn
extends Nooverlap

Diffn constraint assures that any two rectangles from a vector of rectangles does not overlap in at least one direction. It is a simple implementation which does not use sophisticated techniques for efficient backtracking.

Version:

4.6

Author:

Krzysztof Kuchcinski

Field Summary

Fields inherited from class org.jacop.constraints.Constraint

atomicExecution, consistencyPruningEvents, constraintScope, earlyTerminationOK, increaseWeight, numberId, scope

Fields inherited from class org.jacop.constraints.DecomposedConstraint

queueIndex

Constructor Summary

Constructors

Constructor and Description
Diffn(IntVar[][] rectangles) It specifies a diff constraint.
Diffn(IntVar[][] rectangles, boolean strict) It specifies a diff constraint.
Diffn(IntVar[] origin1, IntVar[] origin2, IntVar[] length1, IntVar[] length2) It constructs a diff constraint.
Diffn(IntVar[] origin1, IntVar[] origin2, IntVar[] length1, IntVar[] length2, boolean strict) It constructs a diff constraint.
Diffn(List<? extends IntVar> o1, List<? extends IntVar> o2, List<? extends IntVar> l1, List<? extends IntVar> l2) It constructs a diff constraint.
Diffn(List<? extends IntVar> o1, List<? extends IntVar> o2, List<? extends IntVar> l1, List<? extends IntVar> l2, boolean strict) It constructs a diff constraint.
Diffn(List<? extends List<? extends IntVar>> rectangles) It specifies a diffn constraint.
Diffn(List<? extends List<? extends IntVar>> rectangles, boolean strict) It specifies a diffn constraint.

Method Summary

Modifier and Type	Method and Description
void	consistency(Store store) It is a (most probably incomplete) consistency function which removes the values from variables domains.
String	toString() It produces a string representation of a constraint state.

Methods inherited from class org.jacop.constraints.diffn.Nooverlap

getDefaultConsistencyPruningEvent, impose

Methods inherited from class org.jacop.constraints.Constraint

arguments, cleanAfterFailure, decompose, getConsistencyPruningEvent, getGuideConstraint, getGuideValue, getGuideVariable, grounded, grounded, id, impose, imposeDecomposition, increaseWeight, intArrayToString, numberArgs, queueVariable, removeConstraint, requiresMonotonicity, setConsistencyPruningEvent, setConstraintScope, setScope, setScope, setScope, setScope, setScope, setWatchedVariableGrounded, supplyGuideFeedback, watchedVariableGrounded

Methods inherited from class org.jacop.constraints.DecomposedConstraint

auxiliaryVariables, checkInput, checkInput, checkInputForDuplication, checkInputForDuplicationSkipSingletons, checkInputForNullness, checkInputForNullness, checkInputForNullness, derivative, getDubletonsSkipSingletons, imposeDecomposition

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Diffn

public Diffn(IntVar[][] rectangles)

It specifies a diff constraint.

Parameters:

rectangles - list of rectangles which can not overlap in at least one dimension.

Diffn

public Diffn(IntVar[][] rectangles,
             boolean strict)

It specifies a diff constraint.

Parameters:

rectangles - list of rectangles which can not overlap in at least one dimension.

strict - true- zero size rectangles need to be between other rectangles; false- these rectangles can be anywhere

Diffn

public Diffn(IntVar[] origin1,
             IntVar[] origin2,
             IntVar[] length1,
             IntVar[] length2)

It constructs a diff constraint.

Parameters:

origin1 - list of variables denoting origin of the rectangle in the first dimension.

origin2 - list of variables denoting origin of the rectangle in the second dimension.

length1 - list of variables denoting length of the rectangle in the first dimension.

length2 - list of variables denoting length of the rectangle in the second dimension.

Diffn

public Diffn(IntVar[] origin1,
             IntVar[] origin2,
             IntVar[] length1,
             IntVar[] length2,
             boolean strict)

It constructs a diff constraint.

Parameters:

origin1 - list of variables denoting origin of the rectangle in the first dimension.

origin2 - list of variables denoting origin of the rectangle in the second dimension.

length1 - list of variables denoting length of the rectangle in the first dimension.

length2 - list of variables denoting length of the rectangle in the second dimension.

strict - true- zero size rectangles need to be between other rectangles; false- these rectangles can be anywhere

Diffn

public Diffn(List<? extends List<? extends IntVar>> rectangles)

It specifies a diffn constraint.

Parameters:

rectangles - list of rectangles which can not overlap in at least one dimension.

Diffn

public Diffn(List<? extends List<? extends IntVar>> rectangles,
             boolean strict)

It specifies a diffn constraint.

Parameters:

rectangles - list of rectangles which can not overlap in at least one dimension.

strict - true- zero size rectangles need to be between other rectangles; false- these rectangles can be anywhere

Diffn

public Diffn(List<? extends IntVar> o1,
             List<? extends IntVar> o2,
             List<? extends IntVar> l1,
             List<? extends IntVar> l2)

It constructs a diff constraint.

Parameters:

o1 - list of variables denoting origin of the rectangle in the first dimension.

o2 - list of variables denoting origin of the rectangle in the second dimension.

l1 - list of variables denoting length of the rectangle in the first dimension.

l2 - list of variables denoting length of the rectangle in the second dimension.

Diffn

public Diffn(List<? extends IntVar> o1,
             List<? extends IntVar> o2,
             List<? extends IntVar> l1,
             List<? extends IntVar> l2,
             boolean strict)

It constructs a diff constraint.

Parameters:

o1 - list of variables denoting origin of the rectangle in the first dimension.

o2 - list of variables denoting origin of the rectangle in the second dimension.

l1 - list of variables denoting length of the rectangle in the first dimension.

l2 - list of variables denoting length of the rectangle in the second dimension.

strict - true- zero size rectangles need to be between other rectangles; false- these rectangles can be anywhere

Method Detail

consistency

public void consistency(Store store)

Description copied from class: Constraint

It is a (most probably incomplete) consistency function which removes the values from variables domains. Only values which do not have any support in a solution space are removed.

Overrides:

consistency in class Nooverlap

Parameters:

store - constraint store within which the constraint consistency is being checked.

toString

public String toString()

Description copied from class: Constraint

It produces a string representation of a constraint state.

Overrides:

toString in class Nooverlap