Package 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:

4.8

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	Diffn.Event

Field Summary

Fields

Modifier and Type	Field	Description
private static boolean	debug
private static boolean	debugNarr
(package private) java.util.Comparator<Diffn.Event>	eventComparator
(package private) static int	profileAdd
(package private) static int	profileSubtract
(package private) static int	pruneEnd
(package private) static int	pruneStart

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

doAreaCheck, idNumber, overlapping, rectangle, stamp, store, strict, trace, traceNarr, x, 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
Diffn(java.util.List<? extends java.util.List<? extends IntVar>> rectangles)	It specifies a diffn constraint.
Diffn(java.util.List<? extends java.util.List<? extends IntVar>> rectangles, boolean strict)	It specifies a diffn constraint.
Diffn(java.util.List<? extends IntVar> o1, java.util.List<? extends IntVar> o2, java.util.List<? extends IntVar> l1, java.util.List<? extends IntVar> l2)	It constructs a diff constraint.
Diffn(java.util.List<? extends IntVar> o1, java.util.List<? extends IntVar> o2, java.util.List<? extends IntVar> l1, java.util.List<? extends IntVar> l2, boolean strict)	It constructs a diff constraint.
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.

Method Summary

Modifier and Type	Method	Description
private void	areaCheck()
private boolean	blocking(java.util.List<Interval> sweepLine, int start, int end, int length)
void	consistency(Store store)	It is a (most probably incomplete) consistency function which removes the values from variables domains.
private void	profile()
private void	sweepPruning(Rectangle r, java.util.BitSet o, int dim)
java.lang.String	toString()	It produces a string representation of a constraint state.
private void	updateSweepLine(java.util.List<Interval> sweepLine, Diffn.Event e)

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

energyCheck, getDefaultConsistencyPruningEvent, impose, notSatisfied, prune, pruning, satisfied

Methods inherited from class org.jacop.constraints.Constraint

afc, 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, 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 Detail

debug

private static final boolean debug

See Also:

Constant Field Values

debugNarr

private static final boolean debugNarr

See Also:

Constant Field Values

eventComparator

java.util.Comparator<Diffn.Event> eventComparator

profileSubtract

static final int profileSubtract

See Also:

Constant Field Values

profileAdd

static final int profileAdd

See Also:

Constant Field Values

pruneStart

static final int pruneStart

See Also:

Constant Field Values

pruneEnd

static final int pruneEnd

See Also:

Constant Field Values

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(java.util.List<? extends java.util.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(java.util.List<? extends java.util.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(java.util.List<? extends IntVar> o1,
             java.util.List<? extends IntVar> o2,
             java.util.List<? extends IntVar> l1,
             java.util.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(java.util.List<? extends IntVar> o1,
             java.util.List<? extends IntVar> o2,
             java.util.List<? extends IntVar> l1,
             java.util.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.

areaCheck

private void areaCheck()

profile

private void profile()

sweepPruning

private void sweepPruning(Rectangle r,
                          java.util.BitSet o,
                          int dim)

updateSweepLine

private void updateSweepLine(java.util.List<Interval> sweepLine,
                             Diffn.Event e)

blocking

private boolean blocking(java.util.List<Interval> sweepLine,
                         int start,
                         int end,
                         int length)

toString

public java.lang.String toString()

Description copied from class: Constraint

It produces a string representation of a constraint state.

Overrides:

toString in class Nooverlap