Abstract base camera class - concrete classes for orthographic and perspective cameras derive from it.
This class maintains values for the current:
It provides methods for various projection, overlap and intersection tests for viewport and world locations, against the true frustum and expanded interest box, and for extracting eye position and direction.
It also defines the pure virtual manipulation interface methods the concrete ortho and perspective classes must implement.
Definition at line 43 of file TGLCamera.h.
Public Types | |
enum | EFrustumPlane { kNear = 0 , kLeft = 1 , kRight = 2 , kTop = 3 , kBottom = 4 , kFar = 5 , kPlanesPerFrustum = 6 } |
Public Types inherited from TObject | |
enum | { kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 , kBitMask = 0x00ffffff } |
enum | { kSingleKey = (1ULL << ( 0 )) , kOverwrite = (1ULL << ( 1 )) , kWriteDelete = (1ULL << ( 2 )) } |
enum | EDeprecatedStatusBits { kObjInCanvas = (1ULL << ( 3 )) } |
enum | EStatusBits { kCanDelete = (1ULL << ( 0 )) , kMustCleanup = (1ULL << ( 3 )) , kIsReferenced = (1ULL << ( 4 )) , kHasUUID = (1ULL << ( 5 )) , kCannotPick = (1ULL << ( 6 )) , kNoContextMenu = (1ULL << ( 8 )) , kInvalidObject = (1ULL << ( 13 )) } |
Public Member Functions | |
TGLCamera () | |
Default base camera constructor. | |
TGLCamera (const TGLVector3 &hAxis, const TGLVector3 &vAxis) | |
Default base camera constructor. | |
virtual | ~TGLCamera () |
Base camera destructor. | |
Bool_t | AdjustAndClampVal (Double_t &val, Double_t min, Double_t max, Int_t screenShift, Int_t screenShiftRange, Bool_t mod1, Bool_t mod2) const |
Adjust a passed REFERENCE value 'val', based on screenShift delta. | |
Double_t | AdjustDelta (Double_t screenShift, Double_t deltaFactor, Bool_t mod1, Bool_t mod2) const |
Adjust a passed screen value and apply modifiers. | |
virtual void | Apply (const TGLBoundingBox &sceneBox, const TGLRect *pickRect=nullptr) const =0 |
virtual void | Configure (Double_t zoom, Double_t dolly, Double_t center[3], Double_t hRotate, Double_t vRotate)=0 |
virtual Bool_t | Dolly (Int_t delta, Bool_t mod1, Bool_t mod2) |
Dolly the camera - 'move camera along eye line, retaining lens focal length'. | |
void | DrawDebugAids () const |
Draw out some debugging aids for the camera: | |
TGLVector3 | EyeDirection () const |
Extract the camera eye direction (vector), running from EyePoint() Camera must have valid frustum cache - call Apply() after last modification, before using. | |
TGLVertex3 | EyePoint () const |
Return the camera eye point (vertex) in world space Camera must have valid frustum cache - call Apply() after last modification, before using. | |
TGLVertex3 | FrustumCenter () const |
Find the center of the camera frustum from intersection of planes This method will work even with parallel left/right & top/bottom and infinite eye point of ortho cameras Camera must have valid frustum cache - call Apply() after last modification, before using. | |
Rgl::EOverlap | FrustumOverlap (const TGLBoundingBox &box) const |
Calculate overlap (kInside, kOutside, kPartial) of box with camera frustum Camera must have valid frustum cache - call Apply() after last modification, before using. | |
const TGLPlane & | FrustumPlane (EFrustumPlane plane) const |
const TGLMatrix & | GetCamBase () const |
const TGLMatrix & | GetCamTrans () const |
Double_t * | GetCenterVec () |
Bool_t | GetExternalCenter () |
Double_t | GetFarClip () const |
Double_t * | GetFixDefCenterVec () |
Double_t | GetNearClip () const |
Double_t | GetTheta () const |
Get angle between camera up axis. | |
Float_t | GetVAxisMinAngle () |
void | IncTimeStamp () |
virtual TClass * | IsA () const |
Bool_t | IsCacheDirty () const |
virtual Bool_t | IsOrthographic () const |
virtual Bool_t | IsPerspective () const |
Bool_t | OfInterest (const TGLBoundingBox &box, Bool_t ignoreSize) const |
Calculate if the an object defined by world frame bounding box is 'of interest' to the camera. | |
TGLMatrix & | RefCamBase () |
TGLMatrix & | RefCamTrans () |
TGLMatrix & | RefLastNoPickProjM () const |
const TGLMatrix & | RefModelViewMatrix () const |
TGLRect & | RefViewport () |
const TGLRect & | RefViewport () const |
virtual void | Reset ()=0 |
void | ResetInterest () |
Clear out the existing interest box. | |
virtual Bool_t | Rotate (Int_t xDelta, Int_t yDelta, Bool_t mod1, Bool_t mod2) |
Rotate the camera round view volume center established in Setup(). | |
virtual Bool_t | RotateArcBall (Int_t xDelta, Int_t yDelta, Bool_t mod1, Bool_t mod2) |
Rotate the camera round view volume center established in Setup(). | |
virtual Bool_t | RotateArcBallRad (Double_t hRotate, Double_t vRotate) |
Rotate camera around center. | |
virtual Bool_t | RotateRad (Double_t hRotate, Double_t vRotate) |
Rotate camera around center. | |
void | SetCenterVec (Double_t x, Double_t y, Double_t z) |
Set camera center vector. | |
void | SetCenterVecWarp (Double_t x, Double_t y, Double_t z) |
Set camera center vector and do not keep the same combined camera transformation matrix. | |
void | SetExternalCenter (Bool_t x) |
Set camera center diffrent than scene center, if enable is kTRUE. | |
void | SetFixDefCenter (Bool_t x) |
void | SetFixDefCenterVec (Double_t x, Double_t y, Double_t z) |
virtual void | Setup (const TGLBoundingBox &box, Bool_t reset=kTRUE)=0 |
void | SetVAxisMinAngle (Float_t x) |
void | SetViewport (const TGLRect &viewport) |
Set viewport extents from passed 'viewport' rect. | |
virtual void | Streamer (TBuffer &) |
Stream an object of class TObject. | |
void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
UInt_t | TimeStamp () const |
virtual Bool_t | Truck (Double_t xDelta, Double_t yDelta) |
Truck the camera - 'move camera parallel to film plane'. | |
virtual Bool_t | Truck (Int_t xDelta, Int_t yDelta, Bool_t mod1, Bool_t mod2)=0 |
Bool_t | UpdateInterest (Bool_t force) |
Update the internal interest box (fInterestBox) of the camera. | |
TGLVector3 | ViewportDeltaToWorld (const TGLVertex3 &worldRef, Double_t viewportXDelta, Double_t viewportYDelta, TGLMatrix *modviewMat=nullptr) const |
Apply a 2D viewport delta (shift) to the projection of worldRef onto viewport, returning the resultant world vector which equates to it. | |
Rgl::EOverlap | ViewportOverlap (const TGLBoundingBox &box) const |
Calculate overlap (kInside, kOutside, kPartial) of box projection onto viewport (as rect) against the viewport rect. | |
std::pair< Bool_t, TGLVertex3 > | ViewportPlaneIntersection (const TPoint &viewport, const TGLPlane &worldPlane) const |
Find the intersection of projection of supplied viewport TPoint (a 3D world line - see ViewportToWorld) with supplied world plane. | |
std::pair< Bool_t, TGLVertex3 > | ViewportPlaneIntersection (Double_t viewportX, Double_t viewportY, const TGLPlane &worldPlane) const |
Find the intersection of projection of supplied viewport point (a 3D world line - see ViewportToWorld) with supplied world plane. | |
TGLRect | ViewportRect (const TGLBoundingBox &box, const TGLBoundingBox::EFace *face=nullptr) const |
Calculate viewport rectangle which just contains projection of world frame bounding box 'box' onto the viewport. | |
TGLRect | ViewportRect (const TGLBoundingBox &box, TGLBoundingBox::EFace face) const |
Calculate viewport rectangle which just contains projection of single 'face' of world frame bounding box 'box' onto the viewport. | |
TGLVertex3 | ViewportToWorld (const TGLVertex3 &viewportVertex, TGLMatrix *modviewMat=nullptr) const |
Convert a '3D' viewport vertex to 3D world one. | |
TGLLine3 | ViewportToWorld (const TPoint &viewport) const |
Convert a 2D viewport position to 3D world line - the projection of the viewport point into 3D space. | |
TGLLine3 | ViewportToWorld (Double_t viewportX, Double_t viewportY) const |
Convert a 2D viewport position to 3D world line - the projection of the viewport point into 3D space. | |
void | WindowToViewport (Int_t &, Int_t &y) const |
void | WindowToViewport (TGLRect &rect) const |
void | WindowToViewport (TGLVertex3 &vertex) const |
void | WindowToViewport (TPoint &point) const |
TGLVector3 | WorldDeltaToViewport (const TGLVertex3 &worldRef, const TGLVector3 &worldDelta) const |
Convert a 3D vector worldDelta (shift) about vertex worldRef to a viewport (screen) '3D' vector. | |
TGLVertex3 | WorldToViewport (const TGLVertex3 &worldVertex, TGLMatrix *modviewMat=nullptr) const |
Convert a 3D world vertex to '3D' viewport (screen) one. | |
virtual Bool_t | Zoom (Int_t delta, Bool_t mod1, Bool_t mod2)=0 |
Public Member Functions inherited from TObject | |
TObject () | |
TObject constructor. | |
TObject (const TObject &object) | |
TObject copy ctor. | |
virtual | ~TObject () |
TObject destructor. | |
void | AbstractMethod (const char *method) const |
Use this method to implement an "abstract" method that you don't want to leave purely abstract. | |
virtual void | AppendPad (Option_t *option="") |
Append graphics object to current pad. | |
virtual void | Browse (TBrowser *b) |
Browse object. May be overridden for another default action. | |
ULong_t | CheckedHash () |
Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object. | |
virtual const char * | ClassName () const |
Returns name of class to which the object belongs. | |
virtual void | Clear (Option_t *="") |
virtual TObject * | Clone (const char *newname="") const |
Make a clone of an object using the Streamer facility. | |
virtual Int_t | Compare (const TObject *obj) const |
Compare abstract method. | |
virtual void | Copy (TObject &object) const |
Copy this to obj. | |
virtual void | Delete (Option_t *option="") |
Delete this object. | |
virtual Int_t | DistancetoPrimitive (Int_t px, Int_t py) |
Computes distance from point (px,py) to the object. | |
virtual void | Draw (Option_t *option="") |
Default Draw method for all objects. | |
virtual void | DrawClass () const |
Draw class inheritance tree of the class to which this object belongs. | |
virtual TObject * | DrawClone (Option_t *option="") const |
Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1) . | |
virtual void | Dump () const |
Dump contents of object on stdout. | |
virtual void | Error (const char *method, const char *msgfmt,...) const |
Issue error message. | |
virtual void | Execute (const char *method, const char *params, Int_t *error=nullptr) |
Execute method on this object with the given parameter string, e.g. | |
virtual void | Execute (TMethod *method, TObjArray *params, Int_t *error=nullptr) |
Execute method on this object with parameters stored in the TObjArray. | |
virtual void | ExecuteEvent (Int_t event, Int_t px, Int_t py) |
Execute action corresponding to an event at (px,py). | |
virtual void | Fatal (const char *method, const char *msgfmt,...) const |
Issue fatal error message. | |
virtual TObject * | FindObject (const char *name) const |
Must be redefined in derived classes. | |
virtual TObject * | FindObject (const TObject *obj) const |
Must be redefined in derived classes. | |
virtual Option_t * | GetDrawOption () const |
Get option used by the graphics system to draw this object. | |
virtual const char * | GetIconName () const |
Returns mime type name of object. | |
virtual const char * | GetName () const |
Returns name of object. | |
virtual char * | GetObjectInfo (Int_t px, Int_t py) const |
Returns string containing info about the object at position (px,py). | |
virtual Option_t * | GetOption () const |
virtual const char * | GetTitle () const |
Returns title of object. | |
virtual UInt_t | GetUniqueID () const |
Return the unique object id. | |
virtual Bool_t | HandleTimer (TTimer *timer) |
Execute action in response of a timer timing out. | |
virtual ULong_t | Hash () const |
Return hash value for this object. | |
Bool_t | HasInconsistentHash () const |
Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e. | |
virtual void | Info (const char *method, const char *msgfmt,...) const |
Issue info message. | |
virtual Bool_t | InheritsFrom (const char *classname) const |
Returns kTRUE if object inherits from class "classname". | |
virtual Bool_t | InheritsFrom (const TClass *cl) const |
Returns kTRUE if object inherits from TClass cl. | |
virtual void | Inspect () const |
Dump contents of this object in a graphics canvas. | |
void | InvertBit (UInt_t f) |
Bool_t | IsDestructed () const |
IsDestructed. | |
virtual Bool_t | IsEqual (const TObject *obj) const |
Default equal comparison (objects are equal if they have the same address in memory). | |
virtual Bool_t | IsFolder () const |
Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). | |
R__ALWAYS_INLINE Bool_t | IsOnHeap () const |
virtual Bool_t | IsSortable () const |
R__ALWAYS_INLINE Bool_t | IsZombie () const |
virtual void | ls (Option_t *option="") const |
The ls function lists the contents of a class on stdout. | |
void | MayNotUse (const char *method) const |
Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). | |
virtual Bool_t | Notify () |
This method must be overridden to handle object notification. | |
void | Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const |
Use this method to declare a method obsolete. | |
void | operator delete (void *ptr) |
Operator delete. | |
void | operator delete[] (void *ptr) |
Operator delete []. | |
void * | operator new (size_t sz) |
void * | operator new (size_t sz, void *vp) |
void * | operator new[] (size_t sz) |
void * | operator new[] (size_t sz, void *vp) |
TObject & | operator= (const TObject &rhs) |
TObject assignment operator. | |
virtual void | Paint (Option_t *option="") |
This method must be overridden if a class wants to paint itself. | |
virtual void | Pop () |
Pop on object drawn in a pad to the top of the display list. | |
virtual void | Print (Option_t *option="") const |
This method must be overridden when a class wants to print itself. | |
virtual Int_t | Read (const char *name) |
Read contents of object with specified name from the current directory. | |
virtual void | RecursiveRemove (TObject *obj) |
Recursively remove this object from a list. | |
void | ResetBit (UInt_t f) |
virtual void | SaveAs (const char *filename="", Option_t *option="") const |
Save this object in the file specified by filename. | |
virtual void | SavePrimitive (std::ostream &out, Option_t *option="") |
Save a primitive as a C++ statement(s) on output stream "out". | |
void | SetBit (UInt_t f) |
void | SetBit (UInt_t f, Bool_t set) |
Set or unset the user status bits as specified in f. | |
virtual void | SetDrawOption (Option_t *option="") |
Set drawing option for object. | |
virtual void | SetUniqueID (UInt_t uid) |
Set the unique object id. | |
void | StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b) |
virtual void | SysError (const char *method, const char *msgfmt,...) const |
Issue system error message. | |
R__ALWAYS_INLINE Bool_t | TestBit (UInt_t f) const |
Int_t | TestBits (UInt_t f) const |
virtual void | UseCurrentStyle () |
Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. | |
virtual void | Warning (const char *method, const char *msgfmt,...) const |
Issue warning message. | |
virtual Int_t | Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) |
Write this object to the current directory. | |
virtual Int_t | Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) const |
Write this object to the current directory. | |
Static Public Member Functions | |
static TClass * | Class () |
static const char * | Class_Name () |
static constexpr Version_t | Class_Version () |
static const char * | DeclFileName () |
Static Public Member Functions inherited from TObject | |
static TClass * | Class () |
static const char * | Class_Name () |
static constexpr Version_t | Class_Version () |
static const char * | DeclFileName () |
static Longptr_t | GetDtorOnly () |
Return destructor only flag. | |
static Bool_t | GetObjectStat () |
Get status of object stat flag. | |
static void | SetDtorOnly (void *obj) |
Set destructor only flag. | |
static void | SetObjectStat (Bool_t stat) |
Turn on/off tracking of objects in the TObjectTable. | |
Protected Member Functions | |
void | UpdateCache () const |
largest box diagonal seen in OfInterest() - used when bootstrapping interest box | |
Protected Member Functions inherited from TObject | |
virtual void | DoError (int level, const char *location, const char *fmt, va_list va) const |
Interface to ErrorHandler (protected). | |
void | MakeZombie () |
Protected Attributes | |
Bool_t | fCacheDirty |
TGLMatrix | fCamBase |
TGLMatrix | fCamTrans |
TGLVector3 * | fCenter |
TGLMatrix | fClipM |
modelView matrix (cached) | |
TGLVector3 | fDefCenter |
Double_t | fDollyDefault |
last applied far-clip | |
Double_t | fDollyDistance |
TGLVector3 | fExtCenter |
Bool_t | fExternalCenter |
Double_t | fFarClip |
last applied near-clip | |
TGLVector3 | fFDCenter |
Bool_t | fFixDefCenter |
TGLPlane | fFrustumPlanes [kPlanesPerFrustum] |
object space clip matrix (cached) | |
TGLBoundingBox | fInterestBox |
viewport (GL coords - origin bottom left) | |
Double_t | fLargestSeen |
the interest box - created in UpdateInterest() | |
TGLMatrix | fLastNoPickProjM |
timestamp | |
TGLMatrix | fModVM |
projection matrix (cached) | |
Double_t | fNearClip |
current camera center | |
TGLMatrix | fProjM |
no-pick projection matrix (cached) | |
UInt_t | fTimeStamp |
cached items dirty? | |
Float_t | fVAxisMinAngle |
TGLRect | fViewport |
frustum planes (cached) | |
Bool_t | fWasArcBalled |
Static Protected Attributes | |
static UInt_t | fgDollyDeltaSens = 500 |
Private Member Functions | |
TGLCamera (const TGLCamera &) | |
TGLBoundingBox | Frustum (Bool_t asBox=kTRUE) const |
expansion c.f. aligned current frustum box | |
TGLCamera & | operator= (const TGLCamera &) |
Private Attributes | |
TGLBoundingBox | fInterestFrustum |
previous interest box (DEBUG) | |
TGLBoundingBox | fInterestFrustumAsBox |
frustum basis of current interest box - NOT a true BB! (DEBUG) | |
TGLBoundingBox | fPreviousInterestBox |
Static Private Attributes | |
static const Double_t | fgInterestBoxExpansion = 1.3 |
frustum basis (as box) of current interest box (DEBUG) | |
Additional Inherited Members | |
Protected Types inherited from TObject | |
enum | { kOnlyPrepStep = (1ULL << ( 3 )) } |
#include <TGLCamera.h>
Enumerator | |
---|---|
kNear | |
kLeft | |
kRight | |
kTop | |
kBottom | |
kFar | |
kPlanesPerFrustum |
Definition at line 46 of file TGLCamera.h.
|
private |
TGLCamera::TGLCamera | ( | ) |
Default base camera constructor.
Definition at line 44 of file TGLCamera.cxx.
TGLCamera::TGLCamera | ( | const TGLVector3 & | hAxis, |
const TGLVector3 & | vAxis | ||
) |
Default base camera constructor.
Definition at line 68 of file TGLCamera.cxx.
|
virtual |
Base camera destructor.
Definition at line 92 of file TGLCamera.cxx.
Bool_t TGLCamera::AdjustAndClampVal | ( | Double_t & | val, |
Double_t | min, | ||
Double_t | max, | ||
Int_t | screenShift, | ||
Int_t | screenShiftRange, | ||
Bool_t | mod1, | ||
Bool_t | mod2 | ||
) | const |
Adjust a passed REFERENCE value 'val', based on screenShift delta.
Two modifier flags ('mod1' / 'mod2' ) for sensitivity:
'val' is modified and clamped to 'min' / 'max' range. Return bool kTRUE if val actually changed.
Used as common interaction function for adjusting zoom/dolly etc
Definition at line 722 of file TGLCamera.cxx.
Double_t TGLCamera::AdjustDelta | ( | Double_t | screenShift, |
Double_t | deltaFactor, | ||
Bool_t | mod1, | ||
Bool_t | mod2 | ||
) | const |
Adjust a passed screen value and apply modifiers.
See AdjustAndClampVal() for details.
Definition at line 762 of file TGLCamera.cxx.
|
pure virtual |
Implemented in TGLPerspectiveCamera, and TGLOrthoCamera.
|
static |
|
inlinestaticconstexpr |
Definition at line 216 of file TGLCamera.h.
|
pure virtual |
Implemented in TGLPerspectiveCamera, and TGLOrthoCamera.
|
inlinestatic |
Definition at line 216 of file TGLCamera.h.
Dolly the camera - 'move camera along eye line, retaining lens focal length'.
Arguments are:
Returns kTRUE is redraw required (camera change), kFALSE otherwise.
Reimplemented in TGLOrthoCamera.
Definition at line 1046 of file TGLCamera.cxx.
void TGLCamera::DrawDebugAids | ( | ) | const |
Draw out some debugging aids for the camera:
Definition at line 793 of file TGLCamera.cxx.
TGLVector3 TGLCamera::EyeDirection | ( | ) | const |
Extract the camera eye direction (vector), running from EyePoint() Camera must have valid frustum cache - call Apply() after last modification, before using.
Definition at line 236 of file TGLCamera.cxx.
TGLVertex3 TGLCamera::EyePoint | ( | ) | const |
Return the camera eye point (vertex) in world space Camera must have valid frustum cache - call Apply() after last modification, before using.
Definition at line 219 of file TGLCamera.cxx.
|
private |
expansion c.f. aligned current frustum box
Return the current camera frustum.
If asBox == kFALSE return a true frustum (truncated square based pyramid). If asBox == kTRUE return a true box, using the far clipping plane intersection projected back to the near plane.
Camera must have valid frustum cache - call Apply() after last modification, before using
Note: TGLBoundingBox is not really valid when filled with truncated pyramid
Definition at line 171 of file TGLCamera.cxx.
TGLVertex3 TGLCamera::FrustumCenter | ( | ) | const |
Find the center of the camera frustum from intersection of planes This method will work even with parallel left/right & top/bottom and infinite eye point of ortho cameras Camera must have valid frustum cache - call Apply() after last modification, before using.
Definition at line 251 of file TGLCamera.cxx.
Rgl::EOverlap TGLCamera::FrustumOverlap | ( | const TGLBoundingBox & | box | ) | const |
Calculate overlap (kInside, kOutside, kPartial) of box with camera frustum Camera must have valid frustum cache - call Apply() after last modification, before using.
Definition at line 275 of file TGLCamera.cxx.
|
inline |
Definition at line 219 of file TGLCamera.h.
|
inline |
Definition at line 166 of file TGLCamera.h.
|
inline |
Definition at line 167 of file TGLCamera.h.
|
inline |
Definition at line 157 of file TGLCamera.h.
|
inline |
Definition at line 153 of file TGLCamera.h.
|
inline |
Definition at line 164 of file TGLCamera.h.
|
inline |
Definition at line 161 of file TGLCamera.h.
|
inline |
Definition at line 163 of file TGLCamera.h.
Double_t TGLCamera::GetTheta | ( | ) | const |
Get angle between camera up axis.
Definition at line 882 of file TGLCamera.cxx.
|
inline |
Definition at line 203 of file TGLCamera.h.
|
inline |
Definition at line 124 of file TGLCamera.h.
|
inlinevirtual |
Reimplemented from TObject.
Reimplemented in TGLOrthoCamera, and TGLPerspectiveCamera.
Definition at line 216 of file TGLCamera.h.
|
inline |
Definition at line 123 of file TGLCamera.h.
|
inlinevirtual |
Reimplemented in TGLOrthoCamera.
Definition at line 118 of file TGLCamera.h.
|
inlinevirtual |
Reimplemented in TGLPerspectiveCamera.
Definition at line 119 of file TGLCamera.h.
Bool_t TGLCamera::OfInterest | ( | const TGLBoundingBox & | box, |
Bool_t | ignoreSize | ||
) | const |
Calculate if the an object defined by world frame bounding box is 'of interest' to the camera.
This is defined as box:
If a box is 'of interest' returns kTRUE, kFALSE otherwise. See TGLCamera::UpdateInterest() for more details of camera interest box.
Note: Length/volume ratios NOT dependent on the projected size of box at current camera configuration as we do not want continual changes. This is used when (re) populating the scene with objects from external client.
TODO: Might be more logical to move this test out to client - and have accessor for fInterestBox instead?
Definition at line 578 of file TGLCamera.cxx.
|
inline |
Definition at line 169 of file TGLCamera.h.
|
inline |
Definition at line 170 of file TGLCamera.h.
|
inline |
Definition at line 174 of file TGLCamera.h.
|
inline |
Definition at line 121 of file TGLCamera.h.
|
inline |
Definition at line 128 of file TGLCamera.h.
|
inline |
Definition at line 129 of file TGLCamera.h.
|
pure virtual |
Implemented in TGLOrthoCamera, and TGLPerspectiveCamera.
void TGLCamera::ResetInterest | ( | ) |
Clear out the existing interest box.
Definition at line 699 of file TGLCamera.cxx.
Rotate the camera round view volume center established in Setup().
Arguments are:
Reimplemented in TGLOrthoCamera.
Definition at line 916 of file TGLCamera.cxx.
Rotate the camera round view volume center established in Setup().
Arguments are:
Definition at line 990 of file TGLCamera.cxx.
Rotate camera around center.
Definition at line 1001 of file TGLCamera.cxx.
Rotate camera around center.
Definition at line 927 of file TGLCamera.cxx.
Set camera center vector.
Definition at line 847 of file TGLCamera.cxx.
Set camera center vector and do not keep the same combined camera transformation matrix.
It appears as if the camera warped to the new center.
Definition at line 867 of file TGLCamera.cxx.
void TGLCamera::SetExternalCenter | ( | Bool_t | x | ) |
Set camera center diffrent than scene center, if enable is kTRUE.
Definition at line 825 of file TGLCamera.cxx.
|
inline |
Definition at line 159 of file TGLCamera.h.
Definition at line 160 of file TGLCamera.h.
|
pure virtual |
Implemented in TGLOrthoCamera, and TGLPerspectiveCamera.
|
inline |
Definition at line 204 of file TGLCamera.h.
void TGLCamera::SetViewport | ( | const TGLRect & | viewport | ) |
Set viewport extents from passed 'viewport' rect.
Definition at line 99 of file TGLCamera.cxx.
|
virtual |
Stream an object of class TObject.
Reimplemented from TObject.
Reimplemented in TGLOrthoCamera, and TGLPerspectiveCamera.
|
inline |
Definition at line 216 of file TGLCamera.h.
|
inline |
Definition at line 125 of file TGLCamera.h.
Truck the camera - 'move camera parallel to film plane'.
Returns kTRUE is redraw required (camera change), kFALSE otherwise.
Reimplemented in TGLOrthoCamera, and TGLPerspectiveCamera.
Definition at line 894 of file TGLCamera.cxx.
|
pure virtual |
Implemented in TGLOrthoCamera, TGLPerspectiveCamera, TGLOrthoCamera, and TGLPerspectiveCamera.
|
protected |
largest box diagonal seen in OfInterest() - used when bootstrapping interest box
Update internally cached frustum values.
Definition at line 108 of file TGLCamera.cxx.
Update the internal interest box (fInterestBox) of the camera.
The interest box is an orientated bounding box, calculated as an expanded container round the frustum. It is used to test if if object bounding boxes are of interest (should be accepted into viewer scene) for a camera - see TGLCamera::OfInterest()
The interest box is updated if the frustum is no longer contained in the existing one, or a new one calculated on the current frustum differs significantly in volume (camera has been zoomed/dollyed sizable amount).
If the interest box is updated we return kTRUE - kFALSE otherwise.
Definition at line 643 of file TGLCamera.cxx.
TGLVector3 TGLCamera::ViewportDeltaToWorld | ( | const TGLVertex3 & | worldRef, |
Double_t | viewportXDelta, | ||
Double_t | viewportYDelta, | ||
TGLMatrix * | modviewMat = nullptr |
||
) | const |
Apply a 2D viewport delta (shift) to the projection of worldRef onto viewport, returning the resultant world vector which equates to it.
Useful for making 3D world objects track mouse moves.
Camera must have valid frustum cache - call Apply()
Definition at line 546 of file TGLCamera.cxx.
Rgl::EOverlap TGLCamera::ViewportOverlap | ( | const TGLBoundingBox & | box | ) | const |
Calculate overlap (kInside, kOutside, kPartial) of box projection onto viewport (as rect) against the viewport rect.
Camera must have valid frustum cache - call Apply() after last modification, before using.
Definition at line 319 of file TGLCamera.cxx.
std::pair< Bool_t, TGLVertex3 > TGLCamera::ViewportPlaneIntersection | ( | const TPoint & | viewport, |
const TGLPlane & | worldPlane | ||
) | const |
Find the intersection of projection of supplied viewport TPoint (a 3D world line - see ViewportToWorld) with supplied world plane.
Returns std::pair of bool and vertex. If line intersects
Camera must have valid frustum cache - call Apply() after last modification, before using
Definition at line 533 of file TGLCamera.cxx.
std::pair< Bool_t, TGLVertex3 > TGLCamera::ViewportPlaneIntersection | ( | Double_t | viewportX, |
Double_t | viewportY, | ||
const TGLPlane & | worldPlane | ||
) | const |
Find the intersection of projection of supplied viewport point (a 3D world line - see ViewportToWorld) with supplied world plane.
Returns std::pair of Bool_t and TGLVertex3. If line intersects std::pair.first (Bool_t) is kTRUE, and std::pair.second (TGLVertex) contains the intersection vertex. If line does not intersect (line and plane parallel) std::pair.first (Bool_t) if kFALSE, and std::pair.second (TGLVertex) is invalid.
NOTE: The projection lines is extended for the plane intersection test hence the intersection vertex can lie outside the near/far clip regions (not visible)
Camera must have valid frustum cache - call Apply() after last modification, before using
Definition at line 517 of file TGLCamera.cxx.
TGLRect TGLCamera::ViewportRect | ( | const TGLBoundingBox & | box, |
const TGLBoundingBox::EFace * | face = nullptr |
||
) | const |
Calculate viewport rectangle which just contains projection of world frame bounding box 'box' onto the viewport.
If face is null the rect contains the whole bounding box (8 vertices/6 faces). If face is non-null it indicates a box face, and the rect contains the single face (4 vertices). Note use other version of ViewportRect() if you wish to just pass a static EFace enum member (e.g. kFaceLowX)
Note:
Definition at line 351 of file TGLCamera.cxx.
TGLRect TGLCamera::ViewportRect | ( | const TGLBoundingBox & | box, |
TGLBoundingBox::EFace | face | ||
) | const |
Calculate viewport rectangle which just contains projection of single 'face' of world frame bounding box 'box' onto the viewport.
Note use other version of ViewportRect() if you want whole 'box' contained
Definition at line 329 of file TGLCamera.cxx.
TGLVertex3 TGLCamera::ViewportToWorld | ( | const TGLVertex3 & | viewportVertex, |
TGLMatrix * | modviewMat = nullptr |
||
) | const |
Convert a '3D' viewport vertex to 3D world one.
The X()/Y() components of viewportVertex are the horizontal/vertical pixel position.
Definition at line 442 of file TGLCamera.cxx.
Convert a 2D viewport position to 3D world line - the projection of the viewport point into 3D space.
Line runs from near to far camera clip planes (the minimum and maximum visible depth). See also TGLVertex3 TGLCamera::ViewportToWorld(const TGLVertex3 & viewportVertex) const for 3D viewport -> 3D world vertex conversions. See also OpenGL gluUnProject & glDepth documentation
Camera must have valid frustum cache - call Apply() after last modification, before using
Definition at line 498 of file TGLCamera.cxx.
Convert a 2D viewport position to 3D world line - the projection of the viewport point into 3D space.
Line runs from near to far camera clip planes (the minimum and maximum visible depth). See also TGLVertex3 TGLCamera::ViewportToWorld(const TGLVertex3 & viewportVertex) const for 3D viewport -> 3D world vertex conversions. See also OpenGL gluUnProject & glDepth documentation
Camera must have valid frustum cache - call Apply() after last modification, before using
Definition at line 477 of file TGLCamera.cxx.
Definition at line 198 of file TGLCamera.h.
|
inline |
Definition at line 200 of file TGLCamera.h.
|
inline |
Definition at line 201 of file TGLCamera.h.
|
inline |
Definition at line 199 of file TGLCamera.h.
TGLVector3 TGLCamera::WorldDeltaToViewport | ( | const TGLVertex3 & | worldRef, |
const TGLVector3 & | worldDelta | ||
) | const |
Convert a 3D vector worldDelta (shift) about vertex worldRef to a viewport (screen) '3D' vector.
The X()/Y() components of the vector are the horizontal / vertical pixel deltas. The Z() component is the viewport depth delta - for a default depth range between 0.0 (at near clip plane) to 1.0 (at far clip plane) See OpenGL gluProject & glDepth documentation
Camera must have valid frustum cache - call Apply()
Definition at line 426 of file TGLCamera.cxx.
TGLVertex3 TGLCamera::WorldToViewport | ( | const TGLVertex3 & | worldVertex, |
TGLMatrix * | modviewMat = nullptr |
||
) | const |
Convert a 3D world vertex to '3D' viewport (screen) one.
The X()/Y() components of the viewport vertex are the horizontal/vertical pixel positions. The Z() component is the viewport depth value - for a default depth range this is 0.0 (at near clip plane) to 1.0 (at far clip plane). See OpenGL gluProject & glDepth documentation
Camera must have valid frustum cache - call Apply() after last modification, before using
Definition at line 403 of file TGLCamera.cxx.
Implemented in TGLOrthoCamera, and TGLPerspectiveCamera.
|
mutableprotected |
Definition at line 95 of file TGLCamera.h.
|
protected |
Definition at line 76 of file TGLCamera.h.
|
protected |
Definition at line 77 of file TGLCamera.h.
|
protected |
Definition at line 84 of file TGLCamera.h.
|
mutableprotected |
modelView matrix (cached)
Definition at line 100 of file TGLCamera.h.
|
protected |
Definition at line 82 of file TGLCamera.h.
|
protected |
last applied far-clip
Definition at line 90 of file TGLCamera.h.
|
protected |
Definition at line 91 of file TGLCamera.h.
|
protected |
Definition at line 81 of file TGLCamera.h.
|
protected |
Definition at line 78 of file TGLCamera.h.
|
mutableprotected |
last applied near-clip
Definition at line 87 of file TGLCamera.h.
|
protected |
Definition at line 83 of file TGLCamera.h.
|
protected |
Definition at line 79 of file TGLCamera.h.
|
mutableprotected |
object space clip matrix (cached)
Definition at line 101 of file TGLCamera.h.
|
staticprotected |
Definition at line 112 of file TGLCamera.h.
|
staticprivate |
frustum basis (as box) of current interest box (DEBUG)
Definition at line 65 of file TGLCamera.h.
|
protected |
viewport (GL coords - origin bottom left)
Definition at line 105 of file TGLCamera.h.
|
private |
previous interest box (DEBUG)
Definition at line 62 of file TGLCamera.h.
|
private |
frustum basis of current interest box - NOT a true BB! (DEBUG)
Definition at line 63 of file TGLCamera.h.
|
mutableprotected |
the interest box - created in UpdateInterest()
Definition at line 106 of file TGLCamera.h.
|
mutableprotected |
timestamp
Definition at line 97 of file TGLCamera.h.
|
mutableprotected |
projection matrix (cached)
Definition at line 99 of file TGLCamera.h.
|
mutableprotected |
current camera center
Definition at line 86 of file TGLCamera.h.
|
private |
Definition at line 61 of file TGLCamera.h.
|
mutableprotected |
no-pick projection matrix (cached)
Definition at line 98 of file TGLCamera.h.
|
mutableprotected |
cached items dirty?
Definition at line 96 of file TGLCamera.h.
|
protected |
Definition at line 92 of file TGLCamera.h.
|
protected |
frustum planes (cached)
Definition at line 103 of file TGLCamera.h.
|
protected |
Definition at line 80 of file TGLCamera.h.