NAME¶

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 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::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::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.

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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