SoBoolOperation: 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.

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

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

Additional Inherited Members

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 \fBSoBoolOperation::Operation\fP

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)\fC [protected]\fP, \fC [virtual]\fP

Destructor.

Member Function Documentation

\fBSoType\fP SoBoolOperation::getTypeId (void) const\fC [virtual]\fP

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 \fBSoFieldData\fP * SoBoolOperation::getFieldData (void) const\fC [virtual]\fP

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 \fBSoEngineOutputData\fP * SoBoolOperation::getOutputData (void) const\fC [virtual]\fP

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

Implements SoEngine.

Member Data Documentation

\fBSoMFBool\fP SoBoolOperation::a

First set of boolean input 'signal' values.

\fBSoMFBool\fP SoBoolOperation::b

Second set of boolean input 'signal' values.

\fBSoMFEnum\fP 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.

\fBSoEngineOutput\fP SoBoolOperation::output

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

\fBSoEngineOutput\fP SoBoolOperation::inverse

(SoMFBool) The set of inverse results.

Author

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SoBoolOperation (3)