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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.
More...
#include <Inventor/engines/SoBoolOperation.h>
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 | |
~SoBoolOperation () | |
Static Protected Member Functions | |
static const SoFieldData ** | getInputDataPtr (void) |
static const SoEngineOutputData ** | getOutputDataPtr (void) |
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.
Enumeration of available boolean logic operators.
CLEAR |
Always set SoBoolOperation::output to |
SET |
Always set SoBoolOperation::output to |
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 |
SoBoolOperation::SoBoolOperation | ( | void | ) |
Default constructor.
References A, a, A_AND_B, A_AND_NOT_B, A_EQUALS_B, A_NOT_EQUALS_B, A_OR_B, A_OR_NOT_B, B, b, CLEAR, inverse, NOT_A, NOT_A_AND_B, NOT_A_AND_NOT_B, NOT_A_OR_B, NOT_A_OR_NOT_B, NOT_B, operation, output, and SET.
SoBoolOperation::~SoBoolOperation | ( | ) | [protected] |
Destructor.
SoType SoBoolOperation::getClassTypeId | ( | void | ) | [static] |
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 } else if (node->getTypeId().isOfType(SoGroup::getClassTypeId())) { SoGroup * group = (SoGroup *)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.
First set of boolean input "signal" values.
Referenced by SoBoolOperation().
Second set of boolean input "signal" values.
Referenced by SoBoolOperation().
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.
Referenced by SoBoolOperation().
(SoMFBool) The result of each (a[i] operation[i] b[i]) expression.
Referenced by SoBoolOperation().
(SoMFBool) The set of inverse results.
Referenced by SoBoolOperation().
Copyright © 1998-2007 by Systems in Motion AS. All rights reserved.
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