SoVRMLPointLight - Online Linux Manual PageSection : 3
Updated : Mon Jan 25 2021
Source : Version 2.5.0
Note : Coin
NAMESoVRMLPointLight − The SoVRMLPointLight class is used to represent a point light​.
SYNOPSIS
#include <Inventor/VRMLnodes/SoVRMLPointLight​.h> Inherits SoVRMLLight​.
Public Member Functionsvirtual SoType getTypeId (void) const
SoVRMLPointLight (void)
virtual void GLRender (SoGLRenderAction *action)
Static Public Member Functionsstatic SoType getClassTypeId (void)
static void initClass (void)
Public AttributesSoSFVec3f location
SoSFFloat radius
SoSFVec3f attenuation
Protected Member Functionsvirtual const SoFieldData * getFieldData (void) const
virtual ~SoVRMLPointLight ()
Static Protected Member Functionsstatic const SoFieldData ** getFieldDataPtr (void)
Additional Inherited Members
Detailed DescriptionThe SoVRMLPointLight class is used to represent a point light​. 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:

PointLight { exposedField SFFloat ambientIntensity 0 # [0,1] exposedField SFVec3f attenuation 1 0 0 # [0, inf) exposedField SFColor color 1 1 1 # [0,1] exposedField SFFloat intensity 1 # [0,1] exposedField SFVec3f location 0 0 0 # (-inf, inf) exposedField SFBool on TRUE exposedField SFFloat radius 100 # [0, inf) } The PointLight node specifies a point light source at a 3D location in the local coordinate system​. A point light source emits light equally in all directions; that is, it is omnidirectional​. PointLight nodes are specified in the local coordinate system and are affected by ancestor transformations​. Subclause 4​.6​.6, Light sources (http://www.web3d.org/x3d/specifications/vrml/ISO-IEC-14772-VRML97/part1/concepts.html#4.6.6), contains a detailed description of the ambientIntensity, color, and intensity fields​. A PointLight node illuminates geometry within radius metres of its location​. Both radius and location are affected by ancestors' transformations (scales affect radius and transformations affect location)​. The radius field shall be greater than or equal to zero​. PointLight node's illumination falls off with distance as specified by three attenuation coefficients​. The attenuation factor is 1/ max(attenuation[0] + attenuation[1]×r + attenuation[2]×r2, 1), where r is the distance from the light to the surface being illuminated​. The default is no attenuation​. An attenuation value of (0, 0, 0) is identical to (1, 0, 0)​. Attenuation values shall be greater than or equal to zero​. A detailed 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#4.14)​.
Constructor & Destructor Documentation
SoVRMLPointLight::SoVRMLPointLight (void)Constructor​. References attenuation, location, and radius​.
SoVRMLPointLight::~SoVRMLPointLight () [protected], [virtual]Destructor​.
Member Function Documentation
SoType SoVRMLPointLight::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 * SoVRMLPointLight::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 SoVRMLPointLight::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, attenuation, SoVRMLLight::color, SoAction::getState(), SbColor4f::getValue(), SbVec4f::getValue(), SoVRMLLight::intensity, location, SoVRMLLight::on, SoDebugError::post(), and SbColor4f::setRGB()​.
Member Data Documentation
SoSFVec3f SoVRMLPointLight::locationPoint light position​. Referenced by GLRender(), and SoVRMLPointLight()​.
SoSFFloat SoVRMLPointLight::radiusRadius of point light​. Referenced by SoVRMLPointLight()​.
SoSFVec3f SoVRMLPointLight::attenuationThe point light attenuation​. Referenced by GLRender(), and SoVRMLPointLight()​.
AuthorGenerated automatically by Doxygen for Coin from the source code​. 0
Johanes Gumabo
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