--- name: "SoReversePerspectiveCamera" section: "3" platform: "linux" package: "coin" version: "1:4.0.10-1" release: "Arch Linux 2026-11-01" platforms: ["linux"] url: "https://new.carta.tech/SoReversePerspectiveCamera" --- # SoReversePerspectiveCamera(3) The SoReversePerspectiveCamera class defines a camera node with reverse perspective rendering. ## NAME SoReversePerspectiveCamera - The **SoReversePerspectiveCamera** class defines a camera node with reverse perspective rendering. ## SYNOPSIS \#include \ Inherits **SoPerspectiveCamera**. ### Public Member Functions virtual **SoType** **getTypeId** (void) const\ **SoReversePerspectiveCamera** (void)\ Public Member Functions inherited from **SoPerspectiveCamera** **SoPerspectiveCamera** (void)\ virtual void **scaleHeight** (float scalefactor)\ virtual **SbViewVolume** **getViewVolume** (float useaspectratio=0.0f) const\ virtual void **viewBoundingBox** (const **SbBox3f** &box, float aspect, float slack)\ Public Member Functions inherited from **SoCamera** **SbViewVolume** **getViewVolume** (const **SbViewportRegion** &vp, **SbViewportRegion** &resultvp, const **SbMatrix** &mm=**SbMatrix::identity**()) const\ void **pointAt** (const **SbVec3f** &targetpoint)\ void **pointAt** (const **SbVec3f** &targetpoint, const **SbVec3f** &upvector)\ void **viewAll** (**SoNode** \*const sceneroot, const **SbViewportRegion** &vpregion, const float slack=1.0f)\ void **viewAll** (**SoPath** \*const path, const **SbViewportRegion** &vpregion, const float slack=1.0f)\ **SbViewportRegion** **getViewportBounds** (const **SbViewportRegion** ®ion) const\ void **setStereoMode** (**StereoMode** mode)\ **StereoMode** **getStereoMode** (void) const\ void **setStereoAdjustment** (float adjustment)\ float **getStereoAdjustment** (void) const\ void **setBalanceAdjustment** (float adjustment)\ float **getBalanceAdjustment** (void) const\ virtual void **doAction** (**SoAction** \*action)\ virtual void **callback** (**SoCallbackAction** \*action)\ virtual void **GLRender** (**SoGLRenderAction** \*action)\ virtual void **audioRender** (**SoAudioRenderAction** \*action)\ virtual void **getBoundingBox** (**SoGetBoundingBoxAction** \*action)\ virtual void **getMatrix** (**SoGetMatrixAction** \*action)\ virtual void **handleEvent** (**SoHandleEventAction** \*action)\ virtual void **rayPick** (**SoRayPickAction** \*action)\ virtual void **getPrimitiveCount** (**SoGetPrimitiveCountAction** \*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 **GLRenderBelowPath** (**SoGLRenderAction** \*action)\ virtual void **GLRenderInPath** (**SoGLRenderAction** \*action)\ virtual void **GLRenderOffPath** (**SoGLRenderAction** \*action)\ virtual void **pick** (**SoPickAction** \*action)\ virtual void **search** (**SoSearchAction** \*action)\ virtual void **write** (**SoWriteAction** \*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 **SoPerspectiveCamera** 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 **SoCamera** 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)\ ### Protected Member Functions virtual const **SoFieldData** \* **getFieldData** (void) const\ virtual **~SoReversePerspectiveCamera** ()\ Protected Member Functions inherited from **SoPerspectiveCamera** virtual **~SoPerspectiveCamera** ()\ Protected Member Functions inherited from **SoCamera** **SoCamera** (void)\ virtual **~SoCamera** ()\ virtual void **jitter** (int numpasses, int curpass, const **SbViewportRegion** &vpreg, **SbVec3f** &jitteramount) 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 **SoPerspectiveCamera** static const **SoFieldData** \*\* **getFieldDataPtr** (void)\ Static Protected Member Functions inherited from **SoCamera** 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 **SoCamera** enum **ViewportMapping** { **CROP\_VIEWPORT\_FILL\_FRAME**, **CROP\_VIEWPORT\_LINE\_FRAME**, **CROP\_VIEWPORT\_NO\_FRAME**, **ADJUST\_CAMERA**, **LEAVE\_ALONE** }\ enum **StereoMode** { **MONOSCOPIC**, **LEFT\_VIEW**, **RIGHT\_VIEW** }\ 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 Attributes inherited from **SoPerspectiveCamera** **SoSFFloat** **heightAngle**\ Public Attributes inherited from **SoCamera** **SoSFEnum** **viewportMapping**\ **SoSFVec3f** **position**\ **SoSFRotation** **orientation**\ **SoSFFloat** **aspectRatio**\ **SoSFFloat** **nearDistance**\ **SoSFFloat** **farDistance**\ **SoSFFloat** **focalDistance**\ 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 **SoReversePerspectiveCamera** class defines a camera node with reverse perspective rendering. For realistic looking 3D scene, the geometry should be rendered with perspective calculations. Use this camera type to accomplish this. Reverse perspective rendering, a special case of perspective rendering, is where the projection rays do not converge in the eye of the observer, but instead at a point behind the scene. Thus objects farther away from the observer appear larger than closer objects. A reverse perspective projection is defined by - • setting the perspective camera position to the projection point behind the scene - • setting near / far distance to negative values - • rotating the camera orientation by 180 degrees around the camera Z-axis to compensate the image flip induced by the negative near / far values. The view volume of the default reverse perspective camera is defined as shown below. **FILE FORMAT/DEFAULTS:** ``` ReversePerspectiveCamera { viewportMapping ADJUST_CAMERA position 0 0 -10 orientation 0 0 1 3.14159 nearDistance -10 farDistance -1 aspectRatio 1 focalDistance -6 heightAngle 0.78539819 } ``` ## Constructor & Destructor Documentation ### SoReversePerspectiveCamera::SoReversePerspectiveCamera (void ) Constructor. ### SoReversePerspectiveCamera::~SoReversePerspectiveCamera () \[protected\], \[virtual\] Destructor. ## Member Function Documentation ### SoType SoReversePerspectiveCamera::getClassTypeId (void ) \[static\] This static method returns the **SoType** object associated with objects of this class. ### SoType SoReversePerspectiveCamera::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. Reimplemented from **SoPerspectiveCamera**. ### const SoFieldData \*\* SoReversePerspectiveCamera::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 \* SoReversePerspectiveCamera::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 **SoPerspectiveCamera**. ## Author Generated automatically by Doxygen for Coin from the source code.