man SoDrawStyle (Fonctions bibliothèques) -

NAME

SoDrawStyle -

SYNOPSIS



#include <Inventor/nodes/SoDrawStyle.h>

Inherits SoNode.

Detailed Description

The SoDrawStyle class specificies common rendering properties for shapes.

Use SoDrawStyle nodes to influence how shape nodes following them in the scenegraph will be rendered. This node type have fields to help decide how certain aspects of point-based shapes, line-based shapes and filled shape primitives are rendered.

Simple scenegraph structure usage example: 

  #Inventor V2.1 ascii
  
  Separator {
     Sphere { }
     Translation { translation 4 0 0 }
     DrawStyle { style LINES  lineWidth 2 }
     Sphere { }
     Translation { translation 4 0 0 }
     DrawStyle { style POINTS  pointSize 2 }
     Sphere { }
  }

FILE FORMAT/DEFAULTS: 

    DrawStyle {
        style FILLED
        pointSize 0
        lineWidth 0
        linePattern 0xffff
    }

Public Types

enum Style { FILLED = SoDrawStyleElement::FILLED, LINES = SoDrawStyleElement::LINES, POINTS = SoDrawStyleElement::POINTS, INVISIBLE = SoDrawStyleElement::INVISIBLE }

Public Member Functions

virtual SoType getTypeId (void) const

SoDrawStyle (void)

virtual void doAction (SoAction *action)

virtual void GLRender (SoGLRenderAction *action)

virtual void callback (SoCallbackAction *action)

Static Public Member Functions

static SoType getClassTypeId (void)

static void initClass (void)

Public Attributes

SoSFEnum style

SoSFFloat pointSize

SoSFFloat lineWidth

SoSFUShort linePattern

Protected Member Functions

virtual const SoFieldData * getFieldData (void) const

virtual ~SoDrawStyle ()

Static Protected Member Functions

static const SoFieldData ** getFieldDataPtr (void)

Member Enumeration Documentation

enum SoDrawStyle::Style

Enumeration for the various ways to render geometry.

Enumerator:

FILLED
Render all geometry as-is.
LINES
Render all geometry as border lines.
POINTS
Render all geometry as vertex points.
INVISIBLE
Don't render geometry.

Constructor & Destructor Documentation

SoDrawStyle::SoDrawStyle (void)

Constructor.

SoDrawStyle::~SoDrawStyle () [protected, virtual]

Destructor.

Member Function Documentation

SoType SoDrawStyle::getClassTypeId (void) [static]

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

Reimplemented from SoNode.

SoType SoDrawStyle::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 ** SoDrawStyle::getFieldDataPtr (void) [static, protected]

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

Reimplemented from SoNode.

const SoFieldData * SoDrawStyle::getFieldData (void) const [protected, 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.

void SoDrawStyle::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 SoNode.

void SoDrawStyle::doAction (SoAction * action) [virtual]

This function performs the typical operation of a node for any action.

Reimplemented from SoNode.

void SoDrawStyle::GLRender (SoGLRenderAction * action) [virtual]

Action method for the SoGLRenderAction.

This is called during rendering traversals. Nodes influencing the rendering state in any way or who wants to throw geometry primitives at OpenGL overrides this method.

Reimplemented from SoNode.

void SoDrawStyle::callback (SoCallbackAction * action) [virtual]

Action method for SoCallbackAction.

Simply updates the state according to how the node behaves for the render action, so the application programmer can use the SoCallbackAction for extracting information about the scene graph.

Reimplemented from SoNode.

Member Data Documentation

SoSFEnum SoDrawStyle::style

How to render the geometry following a drawstyle node in the scene graph. Default SoDrawStyle::FILLED.

SoSFFloat SoDrawStyle::pointSize

Size in screen pixels of SoPointSet points, and also of geometry vertex points if setting the SoDrawStyle::style to SoDrawStyle::POINTS.

The valid range of pointsize settings varies according to which OpenGL implementation is used. For the purpose of not trying to set illegal values, the application programmer should at run-time check the valid range. How this can be accomplished is described in the class documentation of SoGLPointSizeElement.

Default value is 0.0f, which is a 'tag' value which tells the rendering library to use the default setting.

SoSFFloat SoDrawStyle::lineWidth

Width in screen pixels of SoLineSet and SoIndexedLineSet lines, and also of geometry border lines if setting the SoDrawStyle::style to SoDrawStyle::LINES.

The valid range of linewidth settings varies according to which OpenGL implementation is used. For the purpose of not trying to set illegal values, the application programmer should at run-time check the valid range. How this can be accomplished is described in the class documentation of SoGLLineWidthElement.

Default value is 0.0f, which is a 'tag' value which tells the rendering library to use the default setting.

SoSFUShort SoDrawStyle::linePattern

Pattern as a bitmask used when drawing lines. Default is 0xffff (no 'holes').

Author

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