Package org.jacop.constraints.diffn

Class Nooverlap

java.lang.Object

org.jacop.constraints.DecomposedConstraint<Constraint>

org.jacop.constraints.Constraint

org.jacop.constraints.diffn.Nooverlap

Direct Known Subclasses:

Diffn

public class Nooverlap
extends Constraint

Nooverlap 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:

4.10

Field Summary

Fields

Modifier and Type	Field	Description
(package private) boolean	doAreaCheck
(package private) static AtomicInteger	idNumber
(package private) TimeStamp<BitSet>[]	overlapping	Defines first position of the variable that is not ground to 1
(package private) Rectangle[]	rectangle	It specifies the list of rectangles which are of interest for this diff constraint.
(package private) int	stamp	current stamp
(package private) Store	store
(package private) boolean	strict	defines how to treat rectangles with width zero strict = true means they still need to be between other rectangles strict = false these rectangles can be anywhere
(package private) static final boolean	trace
(package private) static final boolean	traceNarr
(package private) static final int	x
(package private) static final int	y

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

Method Summary

Modifier and Type	Method	Description
void	consistency(Store store)	It is a (most probably incomplete) consistency function which removes the values from variables domains.
(package private) void	energyCheck(Rectangle r, BitSet rects)
int	getDefaultConsistencyPruningEvent()
void	impose(Store store)	It imposes the constraint in a given store.
boolean	notSatisfied()
(package private) void	prune(Rectangle r, BitSet rects)
private void	prune(Rectangle ri, Rectangle rj, int dim)
(package private) void	pruning()
boolean	satisfied()
String	toString()	It produces a string representation of a constraint state.

Methods inherited from class org.jacop.constraints.Constraint

afc, arguments, cleanAfterFailure, decompose, getConsistencyPruningEvent, getGuideConstraint, getGuideValue, getGuideVariable, grounded, grounded, id, impose, imposeDecomposition, increaseWeight, intArrayToString, long2int, numberArgs, queueVariable, removeConstraint, requiresMonotonicity, setConsistencyPruningEvent, setConstraintScope, setScope, setScope, setScope, setScope, setScope, setWatchedVariableGrounded, supplyGuideFeedback, updateAFC, 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

Field Details

idNumber

static AtomicInteger idNumber

trace

static final boolean trace

See Also:

• Constant Field Values

traceNarr

static final boolean traceNarr

See Also:

• Constant Field Values

x

static final int x

See Also:

• Constant Field Values

y

static final int y

See Also:

• Constant Field Values

strict

boolean strict

defines how to treat rectangles with width zero strict = true means they still need to be between other rectangles strict = false these rectangles can be anywhere

store

Store store

rectangle

Rectangle[] rectangle

It specifies the list of rectangles which are of interest for this diff constraint.

overlapping

TimeStamp<BitSet>[] overlapping

Defines first position of the variable that is not ground to 1

stamp

int stamp

current stamp

doAreaCheck

boolean doAreaCheck

Constructor Details

Nooverlap

public Nooverlap(IntVar[][] rectangle)

It specifies a diff constraint.

Parameters:

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

Nooverlap

public Nooverlap(IntVar[][] rectangle,
 boolean strict)

It specifies a diff constraint.

Parameters:

rectangle - 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

Nooverlap

public Nooverlap(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.

Nooverlap

public Nooverlap(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

Nooverlap

public Nooverlap(List<? extends List<? extends IntVar>> rectangle)

It specifies a diffn constraint.

Parameters:

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

Nooverlap

public Nooverlap(List<? extends List<? extends IntVar>> rectangle,
 boolean strict)

It specifies a diffn constraint.

Parameters:

rectangle - 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

Nooverlap

public Nooverlap(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.

Nooverlap

public Nooverlap(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 Details

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.

Specified by:

consistency in class Constraint

Parameters:

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

pruning

void pruning()

prune

void prune(Rectangle r,
 BitSet rects)

prune

private void prune(Rectangle ri,
 Rectangle rj,
 int dim)

energyCheck

void energyCheck(Rectangle r,
 BitSet rects)

getDefaultConsistencyPruningEvent

public int getDefaultConsistencyPruningEvent()

Specified by:

getDefaultConsistencyPruningEvent in class Constraint

impose

public void impose(Store store)

Description copied from class: Constraint

It imposes the constraint in a given store.

Overrides:

impose in class Constraint

Parameters:

store - the constraint store to which the constraint is imposed to.

satisfied

public boolean satisfied()

notSatisfied

public boolean notSatisfied()

toString

public String toString()

Description copied from class: Constraint

It produces a string representation of a constraint state.

Overrides:

toString in class Constraint