SoVRMLDirectionalLight - Online Linux Manual PageSection : 3
Updated : Mon Jan 25 2021
Source : Version 2.5.0
Note : Coin
NAMESoVRMLDirectionalLight − The SoVRMLDirectionalLight class is a node type for specifying directional light sources​.
SYNOPSIS
#include <Inventor/VRMLnodes/SoVRMLDirectionalLight​.h> Inherits SoVRMLLight​.
Public Member Functionsvirtual SoType getTypeId (void) const
SoVRMLDirectionalLight (void)
virtual void GLRender (SoGLRenderAction *action)
Static Public Member Functionsstatic SoType getClassTypeId (void)
static void initClass (void)
Public AttributesSoSFVec3f direction
Protected Member Functionsvirtual const SoFieldData * getFieldData (void) const
virtual ~SoVRMLDirectionalLight ()
Static Protected Member Functionsstatic const SoFieldData ** getFieldDataPtr (void)
Additional Inherited Members
Detailed DescriptionThe SoVRMLDirectionalLight class is a node type for specifying directional light sources​. The detailed class documentation is taken verbatim from the VRML97 standard (ISO/IEC 14772-1:1997)​. It is copyright The Web3D Consortium, and is used by permission of the Consortium:

DirectionalLight { exposedField SFFloat ambientIntensity 0 # [0,1] exposedField SFColor color 1 1 1 # [0,1] exposedField SFVec3f direction 0 0 -1 # (-inf,inf) exposedField SFFloat intensity 1 # [0,1] exposedField SFBool on TRUE } The DirectionalLight node defines a directional light source that illuminates along rays parallel to a given 3-dimensional vector​. A description of the ambientIntensity, color, intensity, and on fields is in 4​.6​.6, Light sources (http://www.web3d.org/x3d/specifications/vrml/ISO-IEC-14772-VRML97/part1/concepts.html#4.6.6)​. The direction field specifies the direction vector of the illumination emanating from the light source in the local coordinate system​. Light is emitted along parallel rays from an infinite distance away​. A directional light source illuminates only the objects in its enclosing parent group​. The light may illuminate everything within this coordinate system, including all children and descendants of its parent group​. The accumulated transformations of the parent nodes affect the light​. DirectionalLight nodes do not attenuate with distance​. A precise description of VRML's lighting equations is contained in 4​.14, Lighting model (http://www.web3d.org/x3d/specifications/vrml/ISO-IEC-14772-VRML97/part1/concepts.html#4.6.14)​.
Constructor & Destructor Documentation
SoVRMLDirectionalLight::SoVRMLDirectionalLight (void)Constructor​. References direction​.
SoVRMLDirectionalLight::~SoVRMLDirectionalLight () [protected], [virtual]Destructor​.
Member Function Documentation
SoType SoVRMLDirectionalLight::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​. Reimplemented from SoVRMLLight​.
const SoFieldData * SoVRMLDirectionalLight::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 SoVRMLLight​.
void SoVRMLDirectionalLight::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 SoVRMLLight​. References SoVRMLLight::ambientIntensity, SoVRMLLight::color, direction, SoAction::getState(), SbColor4f::getValue(), SbVec4f::getValue(), SoVRMLLight::intensity, SbVec3f::normalize(), SoVRMLLight::on, SoDebugError::postWarning(), and SbColor4f::setRGB()​.
Member Data Documentation
SoSFVec3f SoVRMLDirectionalLight::directionThe light direction​. Referenced by GLRender(), and SoVRMLDirectionalLight()​.
AuthorGenerated automatically by Doxygen for Coin from the source code​. 0
Johanes Gumabo
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