SoShadowDirectionalLight.3coin4 - Man Page
The SoShadowDirectionalLight class is a node for setting up a directional light which casts shadows.
Synopsis
#include <Inventor/annex/FXViz/nodes/SoShadowDirectionalLight.h>
Inherits SoDirectionalLight.
Public Member Functions
virtual SoType getTypeId (void) const
Returns the type identification of an object derived from a class inheriting SoBase. This is used for run-time type checking and 'downward' casting.
SoShadowDirectionalLight (void)
virtual void GLRender (SoGLRenderAction *action)
Public Member Functions inherited from SoDirectionalLight
virtual SoType getTypeId (void) const
Returns the type identification of an object derived from a class inheriting SoBase. This is used for run-time type checking and 'downward' casting.
SoDirectionalLight (void)
virtual void GLRender (SoGLRenderAction *action)
Public Member Functions inherited from SoLight
virtual SoType getTypeId (void) const
Returns the type identification of an object derived from a class inheriting SoBase. This is used for run-time type checking and 'downward' casting.
virtual void callback (SoCallbackAction *action)
Public Member Functions inherited from SoNode
void setOverride (const SbBool state)
SbBool isOverride (void) const
void setNodeType (const NodeType type)
NodeType getNodeType (void) const
virtual SoNode * copy (SbBool copyconnections=FALSE) const
virtual SbBool affectsState (void) const
virtual void doAction (SoAction *action)
virtual void GLRender (SoGLRenderAction *action)
virtual void GLRenderBelowPath (SoGLRenderAction *action)
virtual void GLRenderInPath (SoGLRenderAction *action)
virtual void GLRenderOffPath (SoGLRenderAction *action)
virtual void callback (SoCallbackAction *action)
virtual void getBoundingBox (SoGetBoundingBoxAction *action)
virtual void getMatrix (SoGetMatrixAction *action)
virtual void handleEvent (SoHandleEventAction *action)
virtual void pick (SoPickAction *action)
virtual void rayPick (SoRayPickAction *action)
virtual void search (SoSearchAction *action)
virtual void write (SoWriteAction *action)
virtual void audioRender (SoAudioRenderAction *action)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
virtual void grabEventsSetup (void)
virtual void grabEventsCleanup (void)
virtual void startNotify (void)
virtual void notify (SoNotList *l)
SbUniqueId getNodeId (void) const
virtual SoChildList * getChildren (void) const
virtual void writeInstance (SoOutput *out)
virtual SoNode * addToCopyDict (void) const
virtual void copyContents (const SoFieldContainer *from, SbBool copyconnections)
virtual SoFieldContainer * copyThroughConnection (void) const
Public Member Functions inherited from SoFieldContainer
void setToDefaults (void)
SbBool hasDefaultValues (void) const
SbBool fieldsAreEqual (const SoFieldContainer *container) const
void copyFieldValues (const SoFieldContainer *container, SbBool copyconnections=FALSE)
SbBool set (const char *const fielddata)
void get (SbString &fielddata)
virtual int getFields (SoFieldList &l) const
virtual int getAllFields (SoFieldList &l) const
virtual SoField * getField (const SbName &name) const
virtual SoField * getEventIn (const SbName &name) const
virtual SoField * getEventOut (const SbName &name) const
SbBool getFieldName (const SoField *const field, SbName &name) const
SbBool enableNotify (const SbBool flag)
SbBool isNotifyEnabled (void) const
SbBool set (const char *fielddata, SoInput *input)
void get (SbString &fielddata, SoOutput *out)
virtual void notify (SoNotList *l)
virtual SbBool validateNewFieldValue (SoField *field, void *newval)
virtual void addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)
virtual void writeInstance (SoOutput *out)
SbBool getIsBuiltIn (void) const
virtual const SoFieldData * getFieldData (void) const
virtual void copyContents (const SoFieldContainer *from, SbBool copyconnections)
virtual SoFieldContainer * copyThroughConnection (void) const
virtual void getFieldsMemorySize (size_t &managed, size_t &unmanaged) const
void setUserData (void *userdata) const
void * getUserData (void) const
Public Member Functions inherited from SoBase
void ref (void) const
void unref (void) const
void unrefNoDelete (void) const
int32_t getRefCount (void) const
void touch (void)
virtual SoType getTypeId (void) const =0
Returns the type identification of an object derived from a class inheriting SoBase. This is used for run-time type checking and 'downward' casting.
SbBool isOfType (SoType type) const
Returns TRUE if the type of this object is either of the same type or inherited from type.
virtual SbName getName (void) const
virtual void setName (const SbName &newname)
virtual void startNotify (void)
virtual void notify (SoNotList *l)
void addAuditor (void *const auditor, const SoNotRec::Type type)
void removeAuditor (void *const auditor, const SoNotRec::Type type)
const SoAuditorList & getAuditors (void) const
virtual void addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)
SbBool shouldWrite (void)
void assertAlive (void) const
Static Public Member Functions
static SoType getClassTypeId (void)
static void initClass (void)
Static Public Member Functions inherited from SoDirectionalLight
static SoType getClassTypeId (void)
static void initClass (void)
Static Public Member Functions inherited from SoLight
static SoType getClassTypeId (void)
static void initClass (void)
Static Public Member Functions inherited from SoNode
static uint32_t getCompatibilityTypes (const SoType &nodetype)
static SoType getClassTypeId (void)
static SoNode * getByName (const SbName &name)
static int getByName (const SbName &name, SoNodeList &l)
static void initClass (void)
static void initClasses (void)
static SbUniqueId getNextNodeId (void)
static int getActionMethodIndex (const SoType type)
static void getBoundingBoxS (SoAction *action, SoNode *node)
static void GLRenderS (SoAction *action, SoNode *node)
static void callbackS (SoAction *action, SoNode *node)
static void getMatrixS (SoAction *action, SoNode *node)
static void handleEventS (SoAction *action, SoNode *node)
static void pickS (SoAction *action, SoNode *node)
static void rayPickS (SoAction *action, SoNode *node)
static void searchS (SoAction *action, SoNode *node)
static void writeS (SoAction *action, SoNode *node)
static void audioRenderS (SoAction *action, SoNode *node)
static void getPrimitiveCountS (SoAction *action, SoNode *node)
Static Public Member Functions inherited from SoFieldContainer
static void initClass (void)
static SoType getClassTypeId (void)
static void cleanupClass (void)
static void initCopyDict (void)
static void addCopy (const SoFieldContainer *orig, const SoFieldContainer *copy)
static SoFieldContainer * checkCopy (const SoFieldContainer *orig)
static SoFieldContainer * findCopy (const SoFieldContainer *orig, const SbBool copyconnections)
static void copyDone (void)
Static Public Member Functions inherited from SoBase
static void initClass (void)
Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
static SoType getClassTypeId (void)
This static method returns the SoType object associated with objects of this class.
static void addName (SoBase *const base, const char *const name)
static void removeName (SoBase *const base, const char *const name)
static void incrementCurrentWriteCounter (void)
static void decrementCurrentWriteCounter (void)
static SoBase * getNamedBase (const SbName &name, SoType type)
static int getNamedBases (const SbName &name, SoBaseList &baselist, SoType type)
static SbBool read (SoInput *input, SoBase *&base, SoType expectedtype)
static void setInstancePrefix (const SbString &c)
static void setTraceRefs (SbBool trace)
static SbBool getTraceRefs (void)
static SbBool connectRoute (SoInput *input, const SbName &fromnodename, const SbName &fromfieldname, const SbName &tonodename, const SbName &tofieldname)
static SbBool readRoute (SoInput *input)
Public Attributes
SoSFNode shadowMapScene
SoSFFloat maxShadowDistance
SoSFVec3f bboxCenter
SoSFVec3f bboxSize
Public Attributes inherited from SoDirectionalLight
SoSFVec3f direction
Public Attributes inherited from SoLight
SoSFBool on
SoSFFloat intensity
SoSFColor color
Protected Member Functions
virtual const SoFieldData * getFieldData (void) const
virtual ~SoShadowDirectionalLight ()
Protected Member Functions inherited from SoDirectionalLight
virtual const SoFieldData * getFieldData (void) const
virtual ~SoDirectionalLight ()
Protected Member Functions inherited from SoLight
virtual const SoFieldData * getFieldData (void) const
SoLight (void)
virtual ~SoLight ()
Protected Member Functions inherited from SoNode
SoNode (void)
virtual ~SoNode ()
virtual SbBool readInstance (SoInput *in, unsigned short flags)
Protected Member Functions inherited from SoFieldContainer
SoFieldContainer (void)
virtual ~SoFieldContainer ()
virtual SbBool readInstance (SoInput *in, unsigned short flags)
Protected Member Functions inherited from SoBase
SoBase (void)
virtual ~SoBase ()
virtual void destroy (void)
SbBool hasMultipleWriteRefs (void) const
SbBool writeHeader (SoOutput *out, SbBool isgroup, SbBool isengine) const
void writeFooter (SoOutput *out) const
virtual const char * getFileFormatName (void) const
virtual SbBool readInstance (SoInput *input, unsigned short flags)=0
virtual SoNotRec createNotRec (void)
Static Protected Member Functions
static const SoFieldData ** getFieldDataPtr (void)
Static Protected Member Functions inherited from SoDirectionalLight
static const SoFieldData ** getFieldDataPtr (void)
Static Protected Member Functions inherited from SoLight
static const SoFieldData ** getFieldDataPtr (void)
Static Protected Member Functions inherited from SoNode
static const SoFieldData ** getFieldDataPtr (void)
static void setNextActionMethodIndex (int index)
static int getNextActionMethodIndex (void)
static void incNextActionMethodIndex (void)
static void setCompatibilityTypes (const SoType &nodetype, const uint32_t bitmask)
Static Protected Member Functions inherited from SoBase
static uint32_t getCurrentWriteCounter (void)
static void staticDataLock (void)
static void staticDataUnlock (void)
Additional Inherited Members
Public Types inherited from SoNode
enum NodeType { INVENTOR = 0x0000, VRML1 = 0x0001, VRML2 = 0x0002, INVENTOR_1 = 0x0004, INVENTOR_2_0 = 0x0008, INVENTOR_2_1 = 0x0010, INVENTOR_2_5 = 0x0020, INVENTOR_2_6 = 0x0040, COIN_1_0 = 0x0080, COIN_2_0 = 0x0100, EXTENSION = 0x0200, COIN_2_2 = 0x0400, COIN_2_3 = 0x0800, COIN_2_4 = 0x1000, INVENTOR_5_0 = 0x2000, COIN_2_5 = 0x4000, COIN_3_0 = 0x8000, INVENTOR_6_0 = 0x10000, COIN_4_0 = 0x20000 }
Protected Types inherited from SoBase
enum BaseFlags { IS_ENGINE = 0x01, IS_GROUP = 0x02 }
Protected Attributes inherited from SoNode
SbUniqueId uniqueId
Protected Attributes inherited from SoFieldContainer
SbBool isBuiltIn
Static Protected Attributes inherited from SoNode
static SbUniqueId nextUniqueId = 1
static int nextActionMethodIndex = 0
Detailed Description
The SoShadowDirectionalLight class is a node for setting up a directional light which casts shadows.
Directional lights usually affect everything, but since it's not always feasible to use one shadow map for the entire scene graph. This node has some extra features to work around this.
It calculates the intersection between the current view volume and either the scene bounding box, or the bounding box provided in this node. The shadows are only calculated for this volume. This means that you'll get more detailed shadows as you zoom in on items in the scene graph.
In addition, you can set the maximum distance from the camera which will be shaded with shadows. Think of this a new far plane for the camera which only affects shadows.
As with SoShadowSpotLight, it's possible to optimize further by setting your own shadow caster scene graph in the shadowMapScene field.
The example scene graph below demonstrates how you can use this node to create shadows on a large number of objects, and still get decent precision when zooming in. To further reduce the volume covered by the shadowmap, you can set maxShadowDistance to some number > 0. This is the distance from the camera where shadows will be visible.
DirectionalLight {
direction 0 0 -1
intensity 0.2
}
ShadowGroup {
quality 1 # to get per pixel lighting
precision 1
ShadowDirectionalLight {
direction 1 1 -1
intensity 0.8
# enable this to reduce the shadow view distance
# maxShadowDistance 200
}
# 900 cubes spaced out over a fairly large area
Array {
origin CENTER
numElements1 30
numElements2 30
numElements3 1
separation1 20 0 0
separation2 0 20 0
separation3 0 0 0
Material { diffuseColor 1 0 0 specularColor 1 1 1 }
Cube { width 4 height 4 depth 4 }
}
# a chess board
Coordinate3 { point [ -400 -400 -3, 400 -400 -3, 400 400 -3, -400 400 -3 ] }
Material { specularColor 1 1 1 shininess 0.9 }
Complexity { textureQuality 0.1 }
Texture2 { image 2 2 3 0xffffff 0x225588 0x225588 0xffffff }
Texture2Transform { scaleFactor 20 20 }
FaceSet { numVertices 4 }
}- Since
Coin 3.0
Constructor & Destructor Documentation
SoShadowDirectionalLight::SoShadowDirectionalLight (void)
Constructor.
SoShadowDirectionalLight::~SoShadowDirectionalLight () [protected], [virtual]
Destructor.
Member Function Documentation
SoType SoShadowDirectionalLight::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
}
}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 SoDirectionalLight.
const SoFieldData * SoShadowDirectionalLight::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 SoDirectionalLight.
void SoShadowDirectionalLight::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 SoDirectionalLight.
Member Data Documentation
SoSFNode SoShadowDirectionalLight::shadowMapScene
The shadow map scene graph. If this is NULL (the default), the node will behave as a normal SoDirectionalLight node.
SoSFFloat SoShadowDirectionalLight::maxShadowDistance
The maximum distance (from the camera) that we'll see shadows from this light source.
SoSFVec3f SoShadowDirectionalLight::bboxCenter
Can be used to specify the volume that should be used for calculating the resulting shadow volume.
SoSFVec3f SoShadowDirectionalLight::bboxSize
Can be used to specify the volume that should be used for calculating the resulting shadow volume.
Author
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