SoSpotLight - Online Linux Manual PageSection : 3
Updated : Mon Jan 25 2021
Source : Version 2.5.0
Note : Coin

NAMESoSpotLight − The SoSpotLight class is a node type for light sources with a cone shaped lightvolume​.

SYNOPSIS
#include <Inventor/nodes/SoSpotLight​.h> Inherits SoLight​. Inherited by SoSpotLightManip​.

Public Member Functionsvirtual SoType getTypeId (void) const
SoSpotLight (void)
virtual void GLRender (SoGLRenderAction *action)

Static Public Member Functionsstatic SoType getClassTypeId (void)
static void initClass (void)

Public AttributesSoSFVec3f location
SoSFVec3f direction
SoSFFloat dropOffRate
SoSFFloat cutOffAngle

Protected Member Functionsvirtual const SoFieldData * getFieldData (void) const
virtual ~SoSpotLight ()

Static Protected Member Functionsstatic const SoFieldData ** getFieldDataPtr (void)

Additional Inherited Members

Detailed DescriptionThe SoSpotLight class is a node type for light sources with a cone shaped lightvolume​. Spotlights are light sources with a position and a direction​. They can be thought of as a pointlight with a lampshade​. See also documentation of parent class for important information regarding light sources in general​. FILE FORMAT/DEFAULTS: SpotLight { on TRUE intensity 1 color 1 1 1 location 0 0 1 direction 0 0 -1 dropOffRate 0 cutOffAngle 0​.78539819 } See also SoSpotLight

Constructor & Destructor Documentation

SoSpotLight::SoSpotLight (void)Constructor​. References cutOffAngle, direction, dropOffRate, and location​.

SoSpotLight::~SoSpotLight () [protected], [virtual]Destructor​.

Member Function Documentation

SoType SoSpotLight::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 SoLight​. Reimplemented in SoSpotLightManip​.

const SoFieldData * SoSpotLight::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 SoLight​. Reimplemented in SoSpotLightManip​.

void SoSpotLight::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​. Reimplemented in SoSpotLightManip​. References SoLight::color, cutOffAngle, direction, dropOffRate, SoAction::getState(), SbColor4f::getValue(), SbVec3f::getValue(), SbVec4f::getValue(), SoLight::intensity, location, SoLight::on, SoDebugError::post(), and SbColor4f::setRGB()​. Referenced by SoSpotLightManip::GLRender()​.

Member Data Documentation

SoSFVec3f SoSpotLight::location3D position of light source​. Default position is <0, 0, 1>​. Referenced by SoSpotLightManip::fieldSensorCB(), GLRender(), SoSpotLight(), SoSpotLightManip::transferFieldValues(), and SoSpotLightManip::valueChangedCB()​.

SoSFVec3f SoSpotLight::directionDirection vector, where the light is pointing​. Default is to point along the negative z-axis​. Referenced by SoSpotLightManip::fieldSensorCB(), GLRender(), SoSpotLight(), SoSpotLightManip::transferFieldValues(), and SoSpotLightManip::valueChangedCB()​.

SoSFFloat SoSpotLight::dropOffRateThe rate of intensity drop-off from the ray along the direction vector​. Value must be between 0​.0 (equal intensity for the whole cone of light), to 1​.0 (a narrow intensity ray)​. Default value is 0​.0​. Referenced by GLRender(), and SoSpotLight()​.

SoSFFloat SoSpotLight::cutOffAngleThe angle in radians from the direction vector where there will be no light outside (i​.e​. the angle of the 'lampshade')​. Default value is PI/4​.0 (i​.e​. 45°)​. Referenced by SoSpotLightManip::fieldSensorCB(), GLRender(), SoSpotLight(), SoSpotLightManip::transferFieldValues(), and SoSpotLightManip::valueChangedCB()​.

AuthorGenerated automatically by Doxygen for Coin from the source code​.
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