SoPerspectiveCamera(3)

📦 version 3.1.3, in fedora 43, fedora 44

okay bestie, welcome to the SoPerspectiveCamera(3) page from the Library Functions Manual. This is part 1, so buckle up. 💖

✨ NAME ✨

SoPerspectiveCamera — okay so this class is literally the camera node that defines perspective rendering. That's the whole vibe. 💅

🌸 SYNOPSIS 🌸

First, the include and the inheritance tea:

#include <Inventor/nodes/SoPerspectiveCamera.h>

Inherits SoCamera.

👑 Public Member Functions 👑

These are the methods that SoPerspectiveCamera brings to the group chat all by itself:

virtual SoType getTypeId (void) const
SoPerspectiveCamera (void)
virtual void scaleHeight (float scalefactor)
virtual SbViewVolume getViewVolume (float useaspectratio=0.0f) const

🦋 Public Member Functions inherited from SoCamera

She didn't come alone—she inherited all of this from SoCamera:

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 &region)
    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 handleEvent (SoHandleEventAction *action)
virtual void rayPick (SoRayPickAction *action)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)

🌈 Public Member Functions inherited from SoNode

More inherited slay 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 getMatrix (SoGetMatrixAction *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)
uint32_t 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

And 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

And the SoBase inheritance, periodt:

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
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 public members of SoPerspectiveCamera:

static SoType getClassTypeId (void)
static void initClass (void)

✨ Static Public Member Functions inherited from SoCamera

Static goodies from SoCamera:

static SoType getClassTypeId (void)
static void initClass (void)

🌟 Static Public Member Functions inherited from SoNode

From SoNode, static edition:

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 uint32_t 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

From SoFieldContainer, static style:

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

From SoBase, static and iconic:

static void initClass (void)
static SoType getClassTypeId (void)
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

Public attributes of SoPerspectiveCamera:

SoSFFloat heightAngle

🦋 Public Attributes inherited from SoCamera

Public attributes from SoCamera:

SoSFEnum viewportMapping
SoSFVec3f position
SoSFRotation orientation
SoSFFloat aspectRatio
SoSFFloat nearDistance
SoSFFloat farDistance
SoSFFloat focalDistance

💅 Protected Member Functions

Protected members of SoPerspectiveCamera — for the internal besties only:

virtual const SoFieldData * getFieldData (void) const
virtual ~SoPerspectiveCamera ()
virtual void viewBoundingBox (const SbBox3f &box, float aspect, float
    slack)

🧚 Protected Member Functions inherited from SoCamera

Protected 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

Protected from SoNode:

SoNode (void)
virtual ~SoNode ()
virtual SbBool readInstance (SoInput *in, unsigned short flags)

💜 Protected Member Functions inherited from SoFieldContainer

Protected from SoFieldContainer:

SoFieldContainer (void)
virtual ~SoFieldContainer ()

🫶 Protected Member Functions inherited from SoBase

Protected 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

⭐ Static Protected Member Functions

Static protected of SoPerspectiveCamera:

static const SoFieldData ** getFieldDataPtr (void)

✨ Static Protected Member Functions inherited from SoCamera

Static protected from SoCamera:

static const SoFieldData ** getFieldDataPtr (void)

🌟 Static Protected Member Functions inherited from SoNode

Static protected 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 protected from SoBase:

static uint32_t getCurrentWriteCounter (void)
static void staticDataLock (void)
static void staticDataUnlock (void)

👑 Additional Inherited Members

Okay so this is the extra inherited stuff, the bonus level:

🦋 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 }

💜 Protected Types inherited from SoBase

enum BaseFlags { IS_ENGINE = 0x01, IS_GROUP = 0x02 }

🧚 Protected Attributes inherited from SoNode

uint32_t uniqueId

🌸 Protected Attributes inherited from SoFieldContainer

SbBool isBuiltIn

🎀 Static Protected Attributes inherited from SoNode

static uint32_t nextUniqueId = 1
static int nextActionMethodIndex = 0

💖 Detailed Description 💖

The SoPerspectiveCamera class defines a camera node with perspective rendering. No cap.

For a realistic looking 3D scene, bestie, the geometry should be rendered with perspective calculations. Use this camera type to accomplish this. It's giving depth, it's giving main character energy. Periodt. 🦋

📁 FILE FORMAT/DEFAULTS: 📁

PerspectiveCamera {
    viewportMapping ADJUST_CAMERA
    position 0 0 1
    orientation 0 0 1  0
    nearDistance 1
    farDistance 10
    aspectRatio 1
    focalDistance 5
    heightAngle 0.78539819
}

🎀 Constructor & Destructor Documentation 🎀

`SoPerspectiveCamera::SoPerspectiveCamera (void )`

Constructor. It constructs, bestie. That's the whole vibe. ✨

`SoPerspectiveCamera::~SoPerspectiveCamera () [protected], [virtual]`

Destructor. Protected and virtual, doing its cleanup thing when it's time to go. 💅

🔥 Member Function Documentation 🔥

`SoType SoPerspectiveCamera::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. Iykyk.

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 SoCamera.

`const SoFieldData * SoPerspectiveCamera::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. That's it. That's the tea. 🍓

Reimplemented from SoCamera.

`void SoPerspectiveCamera::scaleHeight (float scalefactor) [virtual]`

Scale the SoPerspectiveCamera::heightAngle field by multiplying with scalefactor. Math but make it cute. 💖

Implements SoCamera.

`SbViewVolume SoPerspectiveCamera::getViewVolume (float useaspectratio = 0.0f) const [virtual]`

Returns total view volume covered by the camera under the current settings.

This view volume is not adjusted to account for viewport mapping. If you want the same view volume as the one used during rendering, you should do something like this:

SbViewVolume vv;
float aspectratio = myviewport.getViewportAspectRatio();

switch (camera->viewportMapping.getValue()) {
case SoCamera::CROP_VIEWPORT_FILL_FRAME:
case SoCamera::CROP_VIEWPORT_LINE_FRAME:
case SoCamera::CROP_VIEWPORT_NO_FRAME:
  vv = camera->getViewVolume(0.0f);
  break;
case SoCamera::ADJUST_CAMERA:
  vv = camera->getViewVolume(aspectratio);
  if (aspectratio < 1.0f) vv.scale(1.0f / aspectratio);
  break;
case SoCamera::LEAVE_ALONE:
  vv = camera->getViewVolume(0.0f);
  break;
default:
  assert(0 && "unknown viewport mapping");
  break;
}

Also, for the CROPPED viewport mappings, the viewport might be changed if the viewport aspect ratio is not equal to the camera aspect ratio. See SoCamera::getView() to see how this is done.

Implements SoCamera.

`void SoPerspectiveCamera::viewBoundingBox (const SbBox3f & box, float aspect, float slack) [protected], [virtual]`

Convenience method for setting up the camera definition to cover the given bounding box with the given aspect ratio. Multiplies the exact dimensions with a slack factor to have some space between the rendered model and the borders of the rendering area. Giving breathing room, as it should. 🌸

If you define your own camera node class, be aware that this method should not set the orientation field of the camera, only the position, focal distance and near and far clipping planes. Don't do it, bestie. Not the orientation. 🙈

Implements SoCamera.

🌈 Member Data Documentation 🌈

`SoSFFloat SoPerspectiveCamera::heightAngle`

The vertical angle of the viewport, also known as "field of view". Default value is 45° (note: value is specified in radians). Yes, radians. Read it again. 😭

👑 Author 👑

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This page was brought to you by Coin, Version 3.1.3, and it's the SoPerspectiveCamera(3) manual page. Catch you later, bestie! 💅✨🫶

📦 where this page comes from

fedora 43: Coin3-devel 3.1.3-40.fc43 · GPL-2.0-only
fedora 43: Coin3-devel 3.1.3-40.fc43 · GPL-2.0-only
fedora 44: Coin3-devel 3.1.3-42.fc44 · GPL-2.0-only
fedora 44: Coin3-devel 3.1.3-42.fc44 · GPL-2.0-only
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