SoBoolOperation(3) The SoBoolOperation engine evaluates expressions of boolean logic.

SYNOPSIS


#include <Inventor/engines/SoBoolOperation.h>

Inherits SoEngine.

Public Types


enum Operation { CLEAR, SET, A, NOT_A, B, NOT_B, A_OR_B, NOT_A_OR_B, A_OR_NOT_B, NOT_A_OR_NOT_B, A_AND_B, NOT_A_AND_B, A_AND_NOT_B, NOT_A_AND_NOT_B, A_EQUALS_B, A_NOT_EQUALS_B }

Public Member Functions


virtual SoType getTypeId (void) const

virtual const SoFieldData * getFieldData (void) const

virtual const SoEngineOutputData * getOutputData (void) const

SoBoolOperation ()

Static Public Member Functions


static SoType getClassTypeId (void)

static void * createInstance (void)

static void initClass ()

Public Attributes


SoMFBool a

SoMFBool b

SoMFEnum operation

SoEngineOutput output

SoEngineOutput inverse

Protected Member Functions


virtual ~SoBoolOperation (void)

Static Protected Member Functions


static const SoFieldData ** getInputDataPtr (void)

static const SoEngineOutputData ** getOutputDataPtr (void)

Detailed Description

The SoBoolOperation engine evaluates expressions of boolean logic.

The multivalue fields SoBoolOperation::a and SoBoolOperation::b are combined according to the operations set in SoBoolOperation::operation, with the resulting TRUE or FALSE value set on SoBoolOperation::output.

Member Enumeration Documentation

enum SoBoolOperation::Operation

Enumeration of available boolean logic operators.

Enumerator:

CLEAR
Always set SoBoolOperation::output to FALSE, no matter the input values.
SET
Always set SoBoolOperation::output to TRUE, no matter the input values.
A
Output result = SoBoolOperation::a
NOT_A
Output result = ! SoBoolOperation::a
B
Output result = SoBoolOperation::b
NOT_B
Output result = ! SoBoolOperation::b
A_OR_B
r = a || b
NOT_A_OR_B
r = !a || b
A_OR_NOT_B
r = a || !b
NOT_A_OR_NOT_B
r = !a || !b
A_AND_B
r = a && b
NOT_A_AND_B
r = !a && b
A_AND_NOT_B
r = a && !b
NOT_A_AND_NOT_B
r = !a && !b
A_EQUALS_B
r = a==b
A_NOT_EQUALS_B
r = ! a==b

Constructor & Destructor Documentation

SoBoolOperation::SoBoolOperation (void)

Default constructor.

SoBoolOperation::~SoBoolOperation (void) [protected], [virtual]

Destructor.

Member Function Documentation

SoType SoBoolOperation::getClassTypeId (void) [static]

This static method returns the SoType object associated with objects of this class.

Reimplemented from SoEngine.

SoType SoBoolOperation::getTypeId (void) const [virtual]

Returns the type identification of an object derived from a class inheriting SoBase. This is used for run-time type checking and 'downward' casting.

Usage example: 

  void foo(SoNode * node)
  {
    if (node->getTypeId() == SoFile::getClassTypeId()) {
      SoFile * filenode = (SoFile *)node;  // safe downward cast, knows the type
    }
  }

For application programmers wanting to extend the library with new nodes, engines, nodekits, draggers or others: this method needs to be overridden in all subclasses. This is typically done as part of setting up the full type system for extension classes, which is usually accomplished by using the pre-defined macros available through for instance Inventor/nodes/SoSubNode.h (SO_NODE_INIT_CLASS and SO_NODE_CONSTRUCTOR for node classes), Inventor/engines/SoSubEngine.h (for engine classes) and so on.

For more information on writing Coin extensions, see the class documentation of the toplevel superclasses for the various class groups.

Implements SoBase.

const SoFieldData ** SoBoolOperation::getInputDataPtr (void) [static], [protected]

Returns the SoFieldData class which holds information about inputs in this engine.

Reimplemented from SoEngine.

const SoEngineOutputData ** SoBoolOperation::getOutputDataPtr (void) [static], [protected]

Returns the SoEngineOutputData class which holds information about the outputs in this engine.

Reimplemented from SoEngine.

const SoFieldData * SoBoolOperation::getFieldData (void) const [virtual]

Returns a pointer to the class-wide field data storage object for this instance. If no fields are present, returns NULL.

Reimplemented from SoFieldContainer.

const SoEngineOutputData * SoBoolOperation::getOutputData (void) const [virtual]

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.

Implements SoEngine.

void SoBoolOperation::initClass (void) [static]

Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.

Reimplemented from SoEngine.

Member Data Documentation

SoMFBool SoBoolOperation::a

First set of boolean input 'signal' values.

SoMFBool SoBoolOperation::b

Second set of boolean input 'signal' values.

SoMFEnum SoBoolOperation::operation

Set of boolean logic expressions. Each of these are used to combine SoBoolOperation::a with SoBoolOperation::b (for each index value from 0 to the last value) to produce the results on the SoBoolOperation::output field.

SoEngineOutput SoBoolOperation::output

(SoMFBool) The result of each (a[i] operation[i] b[i]) expression.

SoEngineOutput SoBoolOperation::inverse

(SoMFBool) The set of inverse results.

Author

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