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The 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. More...
#include <Inventor/nodes/SoSpotLight.h>
Public Member Functions | |
SoSpotLight (void) | |
virtual void | GLRender (SoGLRenderAction *action) |
Static Public Member Functions | |
static void | initClass (void) |
Public Attributes | |
SoSFVec3f | location |
SoSFVec3f | direction |
SoSFFloat | dropOffRate |
SoSFFloat | cutOffAngle |
Protected Member Functions | |
virtual | ~SoSpotLight () |
The 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 }
SoSpotLight::SoSpotLight | ( | void | ) |
Constructor.
References cutOffAngle, direction, dropOffRate, and location.
SoSpotLight::~SoSpotLight | ( | ) | [protected, virtual] |
Destructor.
void SoSpotLight::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 SoLight.
Reimplemented in SoSpotLightManip.
References SoNode::VRML1.
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(), SbVec3f::getValue(), SbVec4f::getValue(), SbColor4f::getValue(), SoLight::intensity, location, SoLight::on, SoDebugError::post(), and SbColor4f::setRGB().
3D position of light source. Default position is <0, 0, 1>.
Referenced by SoSpotLightManip::fieldSensorCB(), GLRender(), SoSpotLight(), SoSpotLightManip::transferFieldValues(), and SoSpotLightManip::valueChangedCB().
Direction 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().
The 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().
The 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().
Copyright © 1998-2007 by Systems in Motion AS. All rights reserved.
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