SoTextureScalePolicy(3) Coin SoTextureScalePolicy(3) NAME SoTextureScalePolicy - The SoTextureScalePolicy class is a node for controlling the texture scale policy. SYNOPSIS #include Inherits SoNode. Public Types enum Policy { USE_TEXTURE_QUALITY, SCALE_DOWN, SCALE_UP, FRACTURE } 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 SoTextureScalePolicy (void) virtual void GLRender (SoGLRenderAction *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 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 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. 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 SoAuditorList & getAuditors (void) const SbBool shouldWrite (void) void assertAlive (void) const Static Public Member Functions static SoType getClassTypeId (void) 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 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) Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system. 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) 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 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 SoSFEnum policy SoSFFloat quality Protected Member Functions virtual const SoFieldData * getFieldData (void) const virtual ~SoTextureScalePolicy () 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 SoTextureScalePolicy class is a node for controlling the texture scale policy. If a texture map is of size != 2^n, it must be scaled before OpenGL can handle it. This node enables you to control how/if textures are scaled before they are sent to OpenGL. Also, if a texture map is bigger than the maximum OpenGL texture size (implementation and context dependent), it will be scaled down to the maximum size. You can avoid this by setting the texture policy to SoTextureScalePolicy::FRACTURE, in which case the texture will be split into several small subtextures before the geometry using the texture is rendered. Setting SoTextureScalePolicy::policy to SoTextureScalePolicy::FRACTURE will also cause the internal texture handling unit in Coin to automatically downsample the individual subtextures to not use more graphics card memory than necessary to cover the current screen size of the texture. These two aspects of SoTextureScalePolicy::FRACTURE rendering together, subtexture fracturing and automatic downsampling, makes it possible to have textures with almost unlimited size. The only real limit is the amount of memory on the system, since the entire texture must fit into CPU memory. The SoTextureScalePolicy::FRACTURE policy is also very handy for using the Coin libraries built-in handling of non-power-of-2 textures. This will then be done completely transparent to the application programmer, for maximum convenience. Below is a very simple example which demonstrates how to use it. The texture has dimensions 3x3, but no scaling (and thereby interpolation) will have to be done when SoTextureScalePolicy::FRACTURE is specified: #Inventor V2.1 ascii Separator { TextureScalePolicy { policy FRACTURE } Complexity { textureQuality 0.01 } # don't generate smoothed mipmaps Texture2 { image 3 3 4 # dimensions 3x3, RGBA (4-component) image 0xff0000ff 0x00ff00ff 0x0000ffff # red, green, blue 0xffff00ff 0xff00ffff 0x00ffffff # yellow, magenta, cyan 0x222222ff 0x777777ff 0xccccccff # dark, medium and light gray } Cube { } } Be aware that the triangle throughput is much slower when using the FRACTURE texture mode, since all triangles need to be clipped (using the CPU) against subtextures. It's therefore usually not a good idea to use the FRACTURE mode on large triangle meshes. Be aware that this class is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API. FILE FORMAT/DEFAULTS: TextureScalePolicy { policy USE_TEXTURE_QUALITY quality 0.5 } Since Coin 2.0 Member Enumeration Documentation enum SoTextureScalePolicy::Policy Enumerates the available policy settings. Enumerator USE_TEXTURE_QUALITY Uses the texture quality to decide whether to scale up or down. SCALE_DOWN Always scales down. SCALE_UP Always scales up. FRACTURE Splits the texture into several subtextures, and clips the geometry into each subtexture. Also automatically downsamples the subtextures to not use more graphics card memory than necessary versus the current screen size of the texture. These two features makes it possible to have textures with almost unlimited size. The only real limit is the amount of memory on the system, since the entire texture must fit into CPU memory. Be aware that the rendering is quite slow with this mode if the texture(s) will be mapped onto lots of polygon primitives. Constructor & Destructor Documentation SoTextureScalePolicy::SoTextureScalePolicy (void) Constructor. SoTextureScalePolicy::~SoTextureScalePolicy () [protected], [virtual] Destructor. Member Function Documentation SoType SoTextureScalePolicy::getClassTypeId (void) [static] This static method returns the SoType object associated with objects of this class. SoType SoTextureScalePolicy::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. Implements SoBase. const SoFieldData ** SoTextureScalePolicy::getFieldDataPtr (void) [static], [protected] This API member is considered internal to the library, as it is not likely to be of interest to the application programmer. Returns the SoFieldData class which holds information about fields in this node. const SoFieldData * SoTextureScalePolicy::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 SoFieldContainer. void SoTextureScalePolicy::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. Member Data Documentation SoSFEnum SoTextureScalePolicy::policy The policy setting. Default value is USE_TEXTURE_QUALITY. USE_TEXTURE_QUALITY means that SoComplexity::textureQuality will be used to decide if the texture should be scaled up or down. SoComplexity::textureQuality >= 0.7 means scale up, while < 0.7 means scale down. Textures smaller than 256 pixels are never scaled down since you lose too much information. SoSFFloat SoTextureScalePolicy::quality The texture scale/resize quality. Default value is 0.5. This field can be used to force Coin to use a lower quality (but much faster) image resize function. Currently, if you set this field to a value < 0.5, a low quality resize function will be used, otherwise a high quality (but slow) function will be used. Author Generated automatically by Doxygen for Coin from the source code. Version 4.0.2 Tue Dec 26 2023 17:59:22 SoTextureScalePolicy(3)