class SG_EXPORT osg::Camera

Camera class for encapsulating the view position and orientation and projection (lens) used.

Inheritance:

Public Methods

Camera(DisplaySettings* ds=NULL)

Camera(const Camera&)

Camera& operator=(const Camera&)

ProjectionType getProjectionType() const

Get the projection type set by setOtho,setOtho2D,setFrustum, and set perspective methods

void setOrtho(double left, double right, double bottom, double top, double zNear, double zFar)

Set a orthographic projection.

void setOrtho2D(double left, double right, double bottom, double top)

Set a 2D orthographic projection.

void setFrustum(double left, double right, double bottom, double top, double zNear, double zFar)

Set a perspective projection.

void setPerspective(double fovy, double aspectRatio, double zNear, double zFar)

Set a symmetrical perspective projection, See gluPerspective for further details.

void setFOV(double fovx, double fovy, double zNear, double zFar)

Set a sysmmetical perspective projection using field of view

void setNearFar(double zNear, double zFar)

Set the near and far clipping planes

void setAdjustAspectRatioMode(AdjustAspectRatioMode aam)

Set the way that the vertical or horizontal dimensions of the window are adjusted on a resize.

AdjustAspectRatioMode getAdjustAspectRatioMode() const

Get the way that the vertical or horizontal dimensions of the window are adjusted on a resize.

void adjustAspectRatio(double newAspectRatio)

Adjust the clipping planes to account for a new window aspect ratio.

void adjustAspectRatio(double newAspectRatio, AdjustAspectRatioMode aa)

Adjust the clipping planes to account for a new window aspect ratio.

double left() const

double right() const

double bottom() const

double top() const

double zNear() const

double zFar() const

double calc_fovy() const

Calculate and return the equivalent fovx for the current project setting.

double calc_fovx() const

Calculate and return the equivalent fovy for the current project setting.

double calc_aspectRatio() const

Calculate and return the projection aspect ratio.

LookAtType getLookAtType() const

void home()

hardwired home view for now, looking straight down the Z axis at the origin, with 'up' being the y axis

void setView(const Vec3& eyePoint, const Vec3& lookPoint, const Vec3& upVector)

Set the View, the up vector should be orthogonal to the look vector.

void setLookAt(const Vec3& eye, const Vec3& center, const Vec3& up)

set the position and orientation of the camera, using the same convention as gluLookAt

void setLookAt(double eyeX, double eyeY, double eyeZ, double centerX, double centerY, double centerZ, double upX, double upY, double upZ)

set the position and orientation of the camera, using the same convention as gluLookAt

void transformLookAt(const Matrix& matrix)

post multiple the existing eye point and orientation by matrix.

void ensureOrthogonalUpVector()

inline const Vec3& getEyePoint() const

get the eye point.

inline const Vec3& getCenterPoint() const

get the center point.

inline const Vec3& getUpVector() const

get the up vector

Vec3 getLookVector() const

calculate look vector

Vec3 getSideVector() const

calculate side vector

inline float getLookDistance() const

calculate the look distance which is the distance between the eye and the center

void attachTransform(TransformMode mode, RefMatrix* modelTransform=0)

Attach a transform matrix which is applied after the camera look at.

Matrix* getTransform(TransformMode mode)

const Matrix* getTransform(TransformMode mode) const

void setFusionDistanceMode(FusionDistanceMode mode)

Set the mode of the fusion distance function which in use to calculate the fusion distance used in stereo rendering.

FusionDistanceMode getFusionDistanceMode() const

Get the mode of the fusion distance function

void setFusionDistanceRatio(float ratio)

Set the ratio of the fusion distance function which in use to calculate the fusion distance used in stereo rendering.

float getFusionDistanceRatio() const

Get the ratio of the fusion distance function

float getFusionDistance() const

Calculate and return the fusion distance, using the FusionDistanceFunction

void setScreenDistance(float screenDistance)

Set the physical distance between the viewers eyes and the display system.

float getScreenDistance() const

Get the physical distance between the viewers eyes and the display system

Matrix getProjectionMatrix() const

Get the Projection Matrix

Matrix getModelViewMatrix() const

Get the ModelView matrix.

inline Polytope getViewFrustum() const

Get the camera view frustum

Public Members

enum ProjectionType

Range of projection types.

enum AdjustAspectRatioMode

Use in combination with adjustAspectRatio, to control the change in frustum clipping planes to account for changes in windows aspect ratio,

enum LookAtType

enum TransformMode

enum FusionDistanceMode

Protected Fields

ProjectionType _projectionType

AdjustAspectRatioMode _adjustAspectRatioMode

double _left

double _right

double _bottom

double _top

double _zNear

double _zFar

LookAtType _lookAtType

Vec3 _eye

Vec3 _center

Vec3 _up

TransformMode _attachedTransformMode

ref_ptr<RefMatrix> _eyeToModelTransform

ref_ptr<RefMatrix> _modelToEyeTransform

float _screenDistance

FusionDistanceMode _fusionDistanceMode

float _fusionDistanceRatio

Protected Methods

virtual ~Camera()

void copy(const Camera&)

Inherited from Referenced:

Public Methods

inline Referenced& operator = (Referenced&)

static void setDeleteHandler(DeleteHandler* handler)

static DeleteHandler* getDeleteHandler()

inline void ref() const

inline void unref_nodelete() const

inline int referenceCount() const

inline void unref() const

Protected Fields

mutable int _refCount

Documentation

Camera class for encapsulating the view position and orientation and projection (lens) used. Creates a projection and modelview matrices which can be used to set OpenGL's PROJECTION and MODELVIEW matrices respectively.

Camera(DisplaySettings* ds=NULL)

Camera(const Camera&)

Camera& operator=(const Camera&)

enum ProjectionType

Range of projection types. ORTHO2D is a special case of ORTHO where the near and far planes are equal to -1 and 1 respectively. PERSPECTIVE is a special case of FRUSTUM where the left & right and bottom and top and symmetrical.

ORTHO

ORTHO2D

FRUSTUM

PERSPECTIVE

ProjectionType getProjectionType() const

Get the projection type set by setOtho,setOtho2D,setFrustum, and set perspective methods

void setOrtho(double left, double right, double bottom, double top, double zNear, double zFar)

Set a orthographic projection. See glOrtho for further details.

void setOrtho2D(double left, double right, double bottom, double top)

Set a 2D orthographic projection. See gluOrtho2D for further details.

void setFrustum(double left, double right, double bottom, double top, double zNear, double zFar)

Set a perspective projection. See glFrustum for further details.

void setPerspective(double fovy, double aspectRatio, double zNear, double zFar)

Set a symmetrical perspective projection, See gluPerspective for further details. Aspect ratio is defined as width/height.

void setFOV(double fovx, double fovy, double zNear, double zFar)

Set a sysmmetical perspective projection using field of view

void setNearFar(double zNear, double zFar)

Set the near and far clipping planes

enum AdjustAspectRatioMode

Use in combination with adjustAspectRatio, to control the change in frustum clipping planes to account for changes in windows aspect ratio,

ADJUST_VERTICAL

ADJUST_HORIZONTAL

ADJUST_NONE

void setAdjustAspectRatioMode(AdjustAspectRatioMode aam)

Set the way that the vertical or horizontal dimensions of the window are adjusted on a resize.

AdjustAspectRatioMode getAdjustAspectRatioMode() const

Get the way that the vertical or horizontal dimensions of the window are adjusted on a resize.

void adjustAspectRatio(double newAspectRatio)

Adjust the clipping planes to account for a new window aspect ratio. Typically used after resizing a window. Aspect ratio is defined as width/height.

void adjustAspectRatio(double newAspectRatio, AdjustAspectRatioMode aa)

Adjust the clipping planes to account for a new window aspect ratio. Typicall used after resizeing a window. Aspect ratio is defined as width/height.

double left() const

double right() const

double bottom() const

double top() const

double zNear() const

double zFar() const

double calc_fovy() const

Calculate and return the equivalent fovx for the current project setting. This value is only valid for when a symmetric perspective projection exists. i.e. getProjectionType()==PERSPECTIVE.

double calc_fovx() const

Calculate and return the equivalent fovy for the current project setting. This value is only valid for when a symmetric perspective projection exists. i.e. getProjectionType()==PERSPECTIVE.

double calc_aspectRatio() const

Calculate and return the projection aspect ratio. Aspect ratio is defined as width/height.

enum LookAtType

USE_HOME_POSITION

USE_EYE_AND_QUATERNION

USE_EYE_CENTER_AND_UP

LookAtType getLookAtType() const

void home()

hardwired home view for now, looking straight down the Z axis at the origin, with 'up' being the y axis

void setView(const Vec3& eyePoint, const Vec3& lookPoint, const Vec3& upVector)

Set the View, the up vector should be orthogonal to the look vector. setView is now mapped to setLookAt(eye,center,up), and is only kept for backwards compatibility.

void setLookAt(const Vec3& eye, const Vec3& center, const Vec3& up)

set the position and orientation of the camera, using the same convention as gluLookAt

void setLookAt(double eyeX, double eyeY, double eyeZ, double centerX, double centerY, double centerZ, double upX, double upY, double upZ)

set the position and orientation of the camera, using the same convention as gluLookAt

void transformLookAt(const Matrix& matrix)

post multiple the existing eye point and orientation by matrix. note, does not affect any ModelTransforms that are applied.

void ensureOrthogonalUpVector()

inline const Vec3& getEyePoint() const

get the eye point.

inline const Vec3& getCenterPoint() const

get the center point.

inline const Vec3& getUpVector() const

get the up vector

Vec3 getLookVector() const

calculate look vector

Vec3 getSideVector() const

calculate side vector

inline float getLookDistance() const

calculate the look distance which is the distance between the eye and the center

enum TransformMode

EYE_TO_MODEL

MODEL_TO_EYE

NO_ATTACHED_TRANSFORM

void attachTransform(TransformMode mode, RefMatrix* modelTransform=0)

Attach a transform matrix which is applied after the camera look at. The attached matrix can work in two ways, either as transform of the eye into the model coordinates - EYE_TO_MODEL, or as a transform of the model to the eye - MODEL_TO_EYE. The former is equivalent to attaching a camera internal to the scene graph. The later is equivalent to adding a osg::Transform at root of the scene to move the scene to the eye point. Typical used in conjunction with the LookAt position set to home, in which case it is simply treated as a model view matrix. If the same behavior as IRIS Performer's setViewMat is desired then set the LookAt to be (0,0,0),(0,1,0),(0,0,1) since Performer's default direction is along the y axis, unlike OpenGL and the default OSG. If modelTransfor is NULL then do not use any model transform - just use the basic LookAt values. note: Camera internals maintains the both EYE_TO_MODEL and MODEL_TO_EYE internally and ensures that they are the inverse of one another.

Matrix* getTransform(TransformMode mode)

const Matrix* getTransform(TransformMode mode) const

enum FusionDistanceMode

PROPORTIONAL_TO_LOOK_DISTANCE

PROPORTIONAL_TO_SCREEN_DISTANCE

void setFusionDistanceMode(FusionDistanceMode mode)

Set the mode of the fusion distance function which in use to calculate the fusion distance used in stereo rendering. Default value is PROPORTIONAL_TO_LOOK_DISTANCE. Use in conjunction with setFusionDistanceRatio(float).

FusionDistanceMode getFusionDistanceMode() const

Get the mode of the fusion distance function

void setFusionDistanceRatio(float ratio)

Set the ratio of the fusion distance function which in use to calculate the fusion distance used in stereo rendering. Default value is 1.0f Use in conjunction with setFusionDistanceMode(..).

float getFusionDistanceRatio() const

Get the ratio of the fusion distance function

float getFusionDistance() const

Calculate and return the fusion distance, using the FusionDistanceFunction

void setScreenDistance(float screenDistance)

Set the physical distance between the viewers eyes and the display system. Note, only used when rendering in stereo.

float getScreenDistance() const

Get the physical distance between the viewers eyes and the display system

Matrix getProjectionMatrix() const

Get the Projection Matrix

Matrix getModelViewMatrix() const

Get the ModelView matrix. If a ModelTransform is supplied then the ModelView matrix is created by multiplying the current LookAt by ModelTransform. Otherwise it is simply created by using the current LookAt, equivalent to using gluLookAt.

inline Polytope getViewFrustum() const

Get the camera view frustum

virtual ~Camera()

void copy(const Camera&)

ProjectionType _projectionType

AdjustAspectRatioMode _adjustAspectRatioMode

double _left

double _right

double _bottom

double _top

double _zNear

double _zFar

LookAtType _lookAtType

Vec3 _eye

Vec3 _center

Vec3 _up

TransformMode _attachedTransformMode

ref_ptr<RefMatrix> _eyeToModelTransform

ref_ptr<RefMatrix> _modelToEyeTransform

float _screenDistance

FusionDistanceMode _fusionDistanceMode

float _fusionDistanceRatio

This class has no child classes.

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