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SoShadowSpotLight

Langue: en

Autres versions - même langue

Version: 344108 (ubuntu - 24/10/10)

Section: 3 (Bibliothèques de fonctions)

Sommaire

NAME
SYNOPSIS
Detailed Description
Constructor & Destructor Documentation
- SoShadowSpotLight::SoShadowSpotLight (void)Constructor.
- SoShadowSpotLight::~SoShadowSpotLight () [protected, virtual]Destructor.
Member Function Documentation
- void SoShadowSpotLight::initClass (void) [static]Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
- void SoShadowSpotLight::GLRender (SoGLRenderAction * action) [virtual]Action method for the SoGLRenderAction.
Author

NAME

SoShadowSpotLight -

The SoShadowSpotLight class is a node for setting up a spot light which casts shadows.

SYNOPSIS

#include <Inventor/annex/FXViz/nodes/SoShadowSpotLight.h>

Inherits SoSpotLight.

Public Member Functions

SoShadowSpotLight (void)

virtual void GLRender (SoGLRenderAction *action)

Static Public Member Functions

static void initClass (void)

Public Attributes

SoSFNode shadowMapScene

SoSFFloat nearDistance

SoSFFloat farDistance

Protected Member Functions

virtual ~SoShadowSpotLight ()

Detailed Description

The SoShadowSpotLight class is a node for setting up a spot light which casts shadows.

This node can be used instead of a normal SpotLight if you need to improve the performance by supplying a simplified scene graph to be used when rendering the shadow map(s). For instance, the shadow map scene graph doesn't need any textures or materials, and any non-casters can also be excluded from this scene graph. It's more optimal to use this node than to use the SoShadowStyle node to control this, at the cost of some extra application complexity.

It's especially useful if you have a scene with few shadow caster nodes and lots of shadow receiver nodes.

Currently, this node must be placed somewhere in the SoShadowGroup subgraph to cast shadows.

FILE FORMAT/DEFAULTS:

     ShadowSpotLight {
       shadowMapScene NULL
       nearDistance -1
       farDistance -1
     }

Here is the the example from SoShadowGroup, modified to use SoShadowSpotLight instead of a normal SoSpotLight. Notice that only the sphere casts shadows.

   DirectionalLight { direction 0 0 -1 intensity 0.2 }
 
   ShadowGroup {
     quality 1 # to get per pixel lighting
 
     ShadowSpotLight {
       location -8 -8 8.0
       direction 1 1 -1
       cutOffAngle 0.35
       dropOffRate 0.7
 
       shadowMapScene
       DEF sphere Separator {
           Complexity { value 1.0 }
           Material { diffuseColor 1 1 0 specularColor 1 1 1 shininess 0.9 }
           Shuttle { translation0 -3 1 0 translation1 3 -5 0 speed 0.25 on TRUE }
           Translation { translation -5 0 2 }
           Sphere { radius 2.0 }
         }
     }
     # need to insert the sphere in the regular scene graph as well
     USE sphere
 
     Separator {
       Material { diffuseColor 1 0 0 specularColor 1 1 1 shininess 0.9 }
       Shuttle { translation0 0 -5 0 translation1 0 5 0 speed 0.15 on TRUE }
       Translation { translation 0 0 -3 }
       Cube { depth 1.8 }
     }
     Separator {
       Material { diffuseColor 0 1 0 specularColor 1 1 1 shininess 0.9 }
       Shuttle { translation0 -5 0 0 translation1 5 0 0 speed 0.3 on TRUE }
       Translation { translation 0 0 -3 }
       Cube { }
     }
 
     Coordinate3 { point [ -10 -10 -3, 10 -10 -3, 10 10 -3, -10 10 -3 ] }
     Material { specularColor 1 1 1 shininess 0.9 }
 
     Complexity { textureQuality 0.1 }
     Texture2 { image 2 2 3 0xffffff 0x225588 0x225588 0xffffff }
     Texture2Transform { scaleFactor 4 4 }
     FaceSet { numVertices 4 }
   }

Since:

Coin 3.0

Constructor & Destructor Documentation