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SoSceneTexture2 Class Reference

The SoSceneTexture2 class is used to create a 2D texture from a Coin scene graph. More...

#include <Inventor/nodes/SoSceneTexture2.h>

Inheritance diagram for SoSceneTexture2:
SoNode SoFieldContainer SoBase

Public Types

enum  Model { MODULATE = SoMultiTextureImageElement::MODULATE, DECAL = SoMultiTextureImageElement::DECAL, BLEND = SoMultiTextureImageElement::BLEND, REPLACE = SoMultiTextureImageElement::REPLACE }
 
enum  Wrap { REPEAT = SoMultiTextureImageElement::REPEAT, CLAMP = SoMultiTextureImageElement::CLAMP, CLAMP_TO_BORDER = SoMultiTextureImageElement::CLAMP_TO_BORDER }
 
enum  TransparencyFunction { NONE, ALPHA_BLEND, ALPHA_TEST }
 
enum  Type {
  DEPTH, RGBA8, RGBA32F, RGB32F,
  RGBA16F, RGB16F, R3_G3_B2, RGB,
  RGB4, RGB5, RGB8, RGB10,
  RGB12, RGB16, RGBA, RGBA2,
  RGBA4, RGB5_A1, RGB10_A2, RGBA12,
  RGBA16
}
 
- 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
}
 

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 runtime type checking and "downward" casting. More...
 
virtual void notify (SoNotList *list)
 
virtual void write (SoWriteAction *action)
 
virtual void doAction (SoAction *action)
 
virtual void GLRender (SoGLRenderAction *action)
 
virtual void callback (SoCallbackAction *action)
 
virtual void rayPick (SoRayPickAction *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 SoNodecopy (SbBool copyconnections=FALSE) const
 
virtual SbBool affectsState (void) const
 
virtual void GLRenderBelowPath (SoGLRenderAction *action)
 
virtual void GLRenderInPath (SoGLRenderAction *action)
 
virtual void GLRenderOffPath (SoGLRenderAction *action)
 
virtual void getBoundingBox (SoGetBoundingBoxAction *action)
 
virtual void getMatrix (SoGetMatrixAction *action)
 
virtual void handleEvent (SoHandleEventAction *action)
 
virtual void pick (SoPickAction *action)
 
virtual void search (SoSearchAction *action)
 
virtual void audioRender (SoAudioRenderAction *action)
 
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
 
virtual void grabEventsSetup (void)
 
virtual void grabEventsCleanup (void)
 
virtual void startNotify (void)
 
SbUniqueId getNodeId (void) const
 
virtual SoChildListgetChildren (void) const
 
virtual void writeInstance (SoOutput *out)
 
virtual SoNodeaddToCopyDict (void) const
 
virtual void copyContents (const SoFieldContainer *from, SbBool copyconnections)
 
virtual SoFieldContainercopyThroughConnection (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 SoFieldgetField (const SbName &name) const
 
virtual SoFieldgetEventIn (const SbName &name) const
 
virtual SoFieldgetEventOut (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 SbBool validateNewFieldValue (SoField *field, void *newval)
 
virtual void addWriteReference (SoOutput *out, SbBool isfromfield=FALSE)
 
SbBool getIsBuiltIn (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)
 
SbBool isOfType (SoType type) const
 Returns TRUE if the type of this object is either of the same type or inherited from type. More...
 
virtual SbName getName (void) const
 
virtual void setName (const SbName &newname)
 
void addAuditor (void *const auditor, const SoNotRec::Type type)
 
void removeAuditor (void *const auditor, const SoNotRec::Type type)
 
const SoAuditorListgetAuditors (void) const
 
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 SoNode
static uint32_t getCompatibilityTypes (const SoType &nodetype)
 
static SoType getClassTypeId (void)
 
static SoNodegetByName (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 SoFieldContainercheckCopy (const SoFieldContainer *orig)
 
static SoFieldContainerfindCopy (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 SoBasegetNamedBase (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

SoSFEnum wrapS
 
SoSFEnum wrapT
 
SoSFEnum model
 
SoSFColor blendColor
 
SoSFVec4f backgroundColor
 
SoSFVec2s size
 
SoSFNode scene
 
SoSFNode sceneTransparencyType
 
SoSFEnum transparencyFunction
 
SoSFEnum type
 

Protected Member Functions

virtual const SoFieldDatagetFieldData (void) const
 
- 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 ()
 
- 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 SoNotRec createNotRec (void)
 

Static Protected Member Functions

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

- 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 SoSceneTexture2 class is used to create a 2D texture from a Coin scene graph.

Lets the rendering of a scene graph be specified as a texture image to be used in another scene graph. Set up the scene graph used for a texture in the SoSceneTexture2::scene field.

This node behaves exactly like SoTexture2 when it comes mapping the actual texture onto subsequent geometry. Please read the SoTexture2 documentation for more information about how textures are mapped onto shapes.

A notable feature of this node is that it will use offscreen pbuffers for hardware accelerated rendering, if they are available from the OpenGL driver. WGL, GLX and AGL, for OpenGL drivers on Microsoft Windows, X11 and Mac OS X, respectively, all support the OpenGL Architecture Review Board (ARB) pbuffer extension in later incarnations from most OpenGL vendors.

Note also that the offscreen pbuffer will be used directly on the card as a texture, with no costly round trip back and forth from CPU memory, if the OpenGL driver supports the recent ARB_render_texture extension.

An important limitation is that textures should have dimensions that are equal to a whole power-of-two, see documentation for SoSceneTexture::size.

FILE FORMAT/DEFAULTS:

SceneTexture2 {
size 256 256
scene NULL
type RGBA_UNSIGNED_BYTE
blendColor 0 0 0
}
Since
Coin 2.2

Member Enumeration Documentation

◆ Model

Texture mapping model, for deciding how to "merge" the texture map with the object it is mapped onto.

Enumerator
MODULATE 

Texture color is multiplied by the polygon color. The result will be Phong shaded (if light model is PHONG).

DECAL 

Texture image overwrites polygon shading. Textured pixels will not be Phong shaded. Has undefined behaviour for grayscale and grayscale-alpha textures.

BLEND 

This model is normally used with monochrome textures (i.e. textures with one or two components). The first component, the intensity, is then used to blend between the shaded color of the polygon and the SoSceneTexture2::blendColor.

REPLACE 

Texture image overwrites polygon shading. Textured pixels will not be Phong shaded. Supports grayscale and grayscale alpha textures. This feature requires OpenGL 1.1. MODULATE will be used if OpenGL version < 1.1 is detected.

◆ Wrap

Enumeration of wrapping strategies which can be used when the texture map doesn't cover the full extent of the geometry.

Enumerator
REPEAT 

Repeat texture when coordinate is not between 0 and 1.

CLAMP 

Clamp coordinate between 0 and 1.

◆ TransparencyFunction

For deciding how the texture's alpha channel is handled. It's not possible to automatically detect this, since the texture is stored only on the graphics card's memory, and it'd be too slow to fetch the image to test the alpha channel like Coin does for regular textures.

Enumerator
NONE 

The alpha channel is ignored.

ALPHA_BLEND 

Alpha blending is used.

ALPHA_TEST 

An alpha test function is used.

◆ Type

Enumerator
DEPTH 

Specifies a depth buffer texture.

RGBA8 

Specifies an RGBA texture with 8 bits per component.

RGBA32F 

Specifies a RGBA texture with floating point components.

Member Function Documentation

◆ getTypeId()

SoType SoSceneTexture2::getTypeId ( void  ) const
virtual

Returns the type identification of an object derived from a class inheriting SoBase. This is used for runtime 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 predefined 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 top level superclasses for the various class groups.

Implements SoBase.

◆ getFieldData()

const SoFieldData * SoSceneTexture2::getFieldData ( void  ) const
protectedvirtual

Returns a pointer to the class-wide field data storage object for this instance. If no fields are present, returns NULL.

Reimplemented from SoFieldContainer.

◆ notify()

void SoSceneTexture2::notify ( SoNotList l)
virtual

Notifies all auditors for this instance when changes are made.

Reimplemented from SoNode.

◆ write()

void SoSceneTexture2::write ( SoWriteAction action)
virtual

Action method for SoWriteAction.

Writes out a node object, and any connected nodes, engines etc, if necessary.

Reimplemented from SoNode.

◆ doAction()

void SoSceneTexture2::doAction ( SoAction action)
virtual

This function performs the typical operation of a node for any action.

Reimplemented from SoNode.

◆ GLRender()

void SoSceneTexture2::GLRender ( SoGLRenderAction action)
virtual

Action method for the SoGLRenderAction.

This is called during rendering traversals. Nodes influencing the rendering state in any way or want to throw geometry primitives at OpenGL override this method.

Reimplemented from SoNode.

◆ callback()

void SoSceneTexture2::callback ( SoCallbackAction action)
virtual

Action method for SoCallbackAction.

Simply updates the state according to how the node behaves for the render action, so the application programmer can use the SoCallbackAction for extracting information about the scene graph.

Reimplemented from SoNode.

◆ rayPick()

void SoSceneTexture2::rayPick ( SoRayPickAction action)
virtual

Action method for SoRayPickAction.

Checks the ray specification of the action and tests for intersection with the data of the node.

Nodes influencing relevant state variables for how picking is done also override this method.

Reimplemented from SoNode.

Member Data Documentation

◆ wrapS

SoSFEnum SoSceneTexture2::wrapS

Wrapping strategy for the S coordinate when the texture map is narrower than the object to map onto.

Default value is SoSceneTexture2::REPEAT.

◆ wrapT

SoSFEnum SoSceneTexture2::wrapT

Wrapping strategy for the T coordinate when the texture map is shorter than the object to map onto.

Default value is SoSceneTexture2::REPEAT.

◆ model

SoSFEnum SoSceneTexture2::model

Texture mapping model for how the texture map is "merged" with the polygon primitives it is applied to. Default value is SoSceneTexture2::MODULATE.

◆ blendColor

SoSFColor SoSceneTexture2::blendColor

Blend color. Used when SoSceneTexture2::model is SoSceneTexture2::BLEND.

Default color value is [0, 0, 0], black, which means no contribution to the blending is made.

◆ backgroundColor

SoSFVec4f SoSceneTexture2::backgroundColor

The color the color buffer is cleared to before rendering the scene. Default value is (0.0f, 0.0f, 0.0f, 0.0f).

◆ size

SoSFVec2s SoSceneTexture2::size

The size of the texture.

This node currently only supports power of two textures. If the size is not a power of two, the value will be rounded upwards to the next power of two.

◆ scene

SoSFNode SoSceneTexture2::scene

The scene graph that is rendered into the texture.

◆ sceneTransparencyType

SoSFNode SoSceneTexture2::sceneTransparencyType

Used for overriding the transparency type for the sub scene graph. Should contain an instance of the SoTransparencyType node, or NULL to inherit the transparency type from the current viewer.

Please note that if you want to render the texture using frame buffer objects, you need to use of of the NONE, SCREEN_DOOR, ADD or BLEND transparency types.

◆ transparencyFunction

SoSFEnum SoSceneTexture2::transparencyFunction

The transparency function used. Default value is NONE.

◆ type

SoSFNode SoSceneTexture2::type

The type of texture to generate. RGBA8 for normal texture, DEPTH for a depth buffer texture, RGBA32F for a floating point RGBA texture. texture. Default is RGBA_UNSIGNED_BYTE.


The documentation for this class was generated from the following files: