vtkCamera Class Reference

#include <vtkCamera.h>

Inheritance diagram for vtkCamera:

[legend]Collaboration diagram for vtkCamera:

[legend]List of all members.

Detailed Description

a virtual camera for 3D rendering

vtkCamera is a virtual camera for 3D rendering. It provides methods to position and orient the view point and focal point. Convenience methods for moving about the focal point also are provided. More complex methods allow the manipulation of the computer graphics model including view up vector, clipping planes, and camera perspective.

See also:: vtkPerspectiveTransform

Created by:

Martin, Ken

CVS contributions (if > 5%):

Martin, Ken (47%)
Gobbi, David (26%)
Law, Charles (7%)
Schroeder, Will (6%)

CVS logs (CVSweb):

.h (/Rendering/vtkCamera.h)
.cxx (/Rendering/vtkCamera.cxx)

Examples:: vtkCamera (Examples)

Tests:: vtkCamera (Tests)

Definition at line 58 of file vtkCamera.h.

Public Types

typedef vtkObject Superclass

Public Member Functions

void PrintSelf (ostream &os, vtkIndent indent)

virtual const char * GetClassName ()

virtual int IsA (const char *type)

void OrthogonalizeViewUp ()

void SetDistance (double)

void Dolly (double distance)

void Roll (double angle)

void Azimuth (double angle)

void Yaw (double angle)

void Elevation (double angle)

void Pitch (double angle)

void Zoom (double factor)

void SetObliqueAngles (double alpha, double beta)

void ApplyTransform (vtkTransform *t)

virtual vtkMatrix4x4 * GetViewTransformMatrix ()

virtual void Render (vtkRenderer *)

unsigned long GetViewingRaysMTime ()

void ViewingRaysModified ()

virtual void GetFrustumPlanes (double aspect, double planes[24])

void ComputeViewPlaneNormal ()

vtkMatrix4x4 * GetCameraLightTransformMatrix ()

virtual void UpdateViewport (vtkRenderer *vtkNotUsed(ren))

virtual vtkTransform * GetViewTransformObject ()

void SetPosition (double x, double y, double z)

void SetPosition (const double a[3])

virtual double * GetPosition ()

virtual void GetPosition (double &, double &, double &)

virtual void GetPosition (double[3])

void SetFocalPoint (double x, double y, double z)

void SetFocalPoint (const double a[3])

virtual double * GetFocalPoint ()

virtual void GetFocalPoint (double &, double &, double &)

virtual void GetFocalPoint (double[3])

void SetViewUp (double vx, double vy, double vz)

void SetViewUp (const double a[3])

virtual double * GetViewUp ()

virtual void GetViewUp (double &, double &, double &)

virtual void GetViewUp (double[3])

virtual double GetDistance ()

virtual double * GetDirectionOfProjection ()

virtual void GetDirectionOfProjection (double &, double &, double &)

virtual void GetDirectionOfProjection (double[3])

void SetRoll (double angle)

double GetRoll ()

void SetParallelProjection (int flag)

virtual int GetParallelProjection ()

virtual void ParallelProjectionOn ()

virtual void ParallelProjectionOff ()

void SetUseHorizontalViewAngle (int flag)

virtual int GetUseHorizontalViewAngle ()

virtual void UseHorizontalViewAngleOn ()

virtual void UseHorizontalViewAngleOff ()

void SetViewAngle (double angle)

virtual double GetViewAngle ()

void SetParallelScale (double scale)

virtual double GetParallelScale ()

void SetClippingRange (double near, double far)

void SetClippingRange (const double a[2])

virtual double * GetClippingRange ()

virtual void GetClippingRange (double &, double &)

virtual void GetClippingRange (double[2])

void SetThickness (double)

virtual double GetThickness ()

void SetWindowCenter (double x, double y)

virtual double * GetWindowCenter ()

virtual void GetWindowCenter (double &, double &)

virtual void GetWindowCenter (double[2])

virtual double * GetViewPlaneNormal ()

virtual void GetViewPlaneNormal (double &, double &, double &)

virtual void GetViewPlaneNormal (double[3])

void SetViewShear (double dxdz, double dydz, double center)

void SetViewShear (double d[3])

virtual double * GetViewShear ()

virtual void GetViewShear (double &, double &, double &)

virtual void GetViewShear (double[3])

virtual void SetEyeAngle (double)

virtual double GetEyeAngle ()

virtual void SetFocalDisk (double)

virtual double GetFocalDisk ()

virtual vtkMatrix4x4 * GetPerspectiveTransformMatrix (double aspect, double nearz, double farz)

virtual vtkMatrix4x4 * GetCompositePerspectiveTransformMatrix (double aspect, double nearz, double farz)

void SetUserTransform (vtkHomogeneousTransform *transform)

virtual vtkHomogeneousTransform * GetUserTransform ()

double * GetOrientation ()

double * GetOrientationWXYZ ()

void SetViewPlaneNormal (double x, double y, double z)

void SetViewPlaneNormal (const double a[3])

Static Public Member Functions

int IsTypeOf (const char *type)

vtkCamera * SafeDownCast (vtkObject *o)

vtkCamera * New ()

Protected Member Functions

vtkCamera ()

~vtkCamera ()

void ComputeDistance ()

void ComputeViewTransform ()

void ComputePerspectiveTransform (double aspect, double nearz, double farz)

void ComputeCompositePerspectiveTransform (double aspect, double nearz, double farz)

void ComputeCameraLightTransform ()

Protected Attributes

double WindowCenter [2]

double ObliqueAngles [2]

double FocalPoint [3]

double Position [3]

double ViewUp [3]

double ViewAngle

double ClippingRange [2]

double EyeAngle

int ParallelProjection

double ParallelScale

int Stereo

int LeftEye

double Thickness

double Distance

double DirectionOfProjection [3]

double ViewPlaneNormal [3]

double ViewShear [3]

int UseHorizontalViewAngle

vtkHomogeneousTransform * UserTransform

vtkTransform * ViewTransform

vtkPerspectiveTransform * PerspectiveTransform

vtkPerspectiveTransform * Transform

vtkTransform * CameraLightTransform

double FocalDisk

vtkTimeStamp ViewingRaysMTime

Member Typedef Documentation

typedef vtkObject vtkCamera::Superclass

Reimplemented from vtkObject.
Reimplemented in vtkMesaCamera, and vtkOpenGLCamera.
Definition at line 62 of file vtkCamera.h.

Constructor & Destructor Documentation

vtkCamera::vtkCamera ( ) [protected]

vtkCamera::~vtkCamera ( ) [protected]

Member Function Documentation

void vtkCamera::PrintSelf ( ostream & os,

vtkIndent indent

) [virtual]

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.
Reimplemented from vtkObject.
Reimplemented in vtkMesaCamera, and vtkOpenGLCamera.

virtual const char* vtkCamera::GetClassName ( ) [virtual]

Reimplemented from vtkObject.
Reimplemented in vtkMesaCamera, and vtkOpenGLCamera.

int vtkCamera::IsTypeOf ( const char * type ) [static]

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h.
Reimplemented from vtkObject.
Reimplemented in vtkMesaCamera, and vtkOpenGLCamera.

virtual int vtkCamera::IsA ( const char * type ) [virtual]

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h.
Reimplemented from vtkObject.
Reimplemented in vtkMesaCamera, and vtkOpenGLCamera.

vtkCamera* vtkCamera::SafeDownCast ( vtkObject * o ) [static]

Reimplemented from vtkObject.
Reimplemented in vtkMesaCamera, and vtkOpenGLCamera.

vtkCamera* vtkCamera::New ( ) [static]

Construct camera instance with its focal point at the origin, and position=(0,0,1). The view up is along the y-axis, view angle is 30 degrees, and the clipping range is (.1,1000).
Reimplemented from vtkObject.
Reimplemented in vtkMesaCamera, and vtkOpenGLCamera.

void vtkCamera::SetPosition ( double x,

double y,

double z

)

Set/Get the position of the camera in world coordinates. The default position is (0,0,1).

void vtkCamera::SetPosition ( const double a[3] ) [inline]

Set/Get the position of the camera in world coordinates. The default position is (0,0,1).
Definition at line 73 of file vtkCamera.h.

virtual double* vtkCamera::GetPosition ( ) [virtual]

Set/Get the position of the camera in world coordinates. The default position is (0,0,1).

virtual void vtkCamera::GetPosition ( double & ,

double & ,

double &

) [virtual]

Set/Get the position of the camera in world coordinates. The default position is (0,0,1).

virtual void vtkCamera::GetPosition ( double [3] ) [virtual]

Set/Get the position of the camera in world coordinates. The default position is (0,0,1).

void vtkCamera::SetFocalPoint ( double x,

double y,

double z

)

Set/Get the focal of the camera in world coordinates. The default focal point is the origin.

void vtkCamera::SetFocalPoint ( const double a[3] ) [inline]

Set/Get the focal of the camera in world coordinates. The default focal point is the origin.
Definition at line 82 of file vtkCamera.h.

virtual double* vtkCamera::GetFocalPoint ( ) [virtual]

Set/Get the focal of the camera in world coordinates. The default focal point is the origin.

virtual void vtkCamera::GetFocalPoint ( double & ,

double & ,

double &

) [virtual]

Set/Get the focal of the camera in world coordinates. The default focal point is the origin.

virtual void vtkCamera::GetFocalPoint ( double [3] ) [virtual]

Set/Get the focal of the camera in world coordinates. The default focal point is the origin.

void vtkCamera::SetViewUp ( double vx,

double vy,

double vz

)

Set/Get the view up direction for the camera. The default is (0,1,0).

void vtkCamera::SetViewUp ( const double a[3] ) [inline]

Set/Get the view up direction for the camera. The default is (0,1,0).
Definition at line 91 of file vtkCamera.h.

virtual double* vtkCamera::GetViewUp ( ) [virtual]

Set/Get the view up direction for the camera. The default is (0,1,0).

virtual void vtkCamera::GetViewUp ( double & ,

double & ,

double &

) [virtual]

Set/Get the view up direction for the camera. The default is (0,1,0).

virtual void vtkCamera::GetViewUp ( double [3] ) [virtual]

Set/Get the view up direction for the camera. The default is (0,1,0).

void vtkCamera::OrthogonalizeViewUp ( )

Recompute the ViewUp vector to force it to be perpendicular to camera->focalpoint vector. Unless you are going to use Yaw or Azimuth on the camera, there is no need to do this.

void vtkCamera::SetDistance ( double )

Move the focal point so that it is the specified distance from the camera position. This distance must be positive.

virtual double vtkCamera::GetDistance ( ) [virtual]

Return the distance from the camera position to the focal point. This distance is positive.

virtual double* vtkCamera::GetDirectionOfProjection ( ) [virtual]

Get the vector in the direction from the camera position to the focal point. This is usually the opposite of the ViewPlaneNormal, the vector perpendicular to the screen, unless the view is oblique.

virtual void vtkCamera::GetDirectionOfProjection ( double & ,

double & ,

double &

) [virtual]

Get the vector in the direction from the camera position to the focal point. This is usually the opposite of the ViewPlaneNormal, the vector perpendicular to the screen, unless the view is oblique.

virtual void vtkCamera::GetDirectionOfProjection ( double [3] ) [virtual]

Get the vector in the direction from the camera position to the focal point. This is usually the opposite of the ViewPlaneNormal, the vector perpendicular to the screen, unless the view is oblique.

void vtkCamera::Dolly ( double distance )

Move the position of the camera along the direction of projection. Moving towards the focal point (e.g., greater than 1) is a dolly-in, moving away from the focal point (e.g., less than 1) is a dolly-out.

void vtkCamera::SetRoll ( double angle )

Set the roll angle of the camera about the direction of projection.

double vtkCamera::GetRoll ( )

Set the roll angle of the camera about the direction of projection.

void vtkCamera::Roll ( double angle )

Rotate the camera about the direction of projection.

void vtkCamera::Azimuth ( double angle )

Rotate the camera about the view up vector centered at the focal point. Note that the view up vector is not necessarily perpendicular to the direction of projection.

void vtkCamera::Yaw ( double angle )

Rotate the focal point about the view up vector centered at the camera's position. Note that the view up vector is not necessarily perpendicular to the direction of projection.

void vtkCamera::Elevation ( double angle )

Rotate the camera about the cross product of the direction of projection and the view up vector centered on the focal point.

void vtkCamera::Pitch ( double angle )

Rotate the focal point about the cross product of the view up vector and the direction of projection, centered at the camera's position.

void vtkCamera::SetParallelProjection ( int flag )

Set/Get the value of the ParallelProjection instance variable. This determines if the camera should do a perspective or parallel projection.

virtual int vtkCamera::GetParallelProjection ( ) [virtual]

Set/Get the value of the ParallelProjection instance variable. This determines if the camera should do a perspective or parallel projection.

virtual void vtkCamera::ParallelProjectionOn ( ) [virtual]

Set/Get the value of the ParallelProjection instance variable. This determines if the camera should do a perspective or parallel projection.

virtual void vtkCamera::ParallelProjectionOff ( ) [virtual]

Set/Get the value of the ParallelProjection instance variable. This determines if the camera should do a perspective or parallel projection.

void vtkCamera::SetUseHorizontalViewAngle ( int flag )

Set/Get the value of the UseHorizontalViewAngle instance variable. If set, the camera's view angle represents a horizontal view angle, rather than the default vertical view angle. This is useful if the application uses a display device which whose specs indicate a particular horizontal view angle, or if the application varies the window height but wants to keep the perspective transform unchanges.

virtual int vtkCamera::GetUseHorizontalViewAngle ( ) [virtual]

Set/Get the value of the UseHorizontalViewAngle instance variable. If set, the camera's view angle represents a horizontal view angle, rather than the default vertical view angle. This is useful if the application uses a display device which whose specs indicate a particular horizontal view angle, or if the application varies the window height but wants to keep the perspective transform unchanges.

virtual void vtkCamera::UseHorizontalViewAngleOn ( ) [virtual]

Set/Get the value of the UseHorizontalViewAngle instance variable. If set, the camera's view angle represents a horizontal view angle, rather than the default vertical view angle. This is useful if the application uses a display device which whose specs indicate a particular horizontal view angle, or if the application varies the window height but wants to keep the perspective transform unchanges.

virtual void vtkCamera::UseHorizontalViewAngleOff ( ) [virtual]

Set/Get the value of the UseHorizontalViewAngle instance variable. If set, the camera's view angle represents a horizontal view angle, rather than the default vertical view angle. This is useful if the application uses a display device which whose specs indicate a particular horizontal view angle, or if the application varies the window height but wants to keep the perspective transform unchanges.

void vtkCamera::SetViewAngle ( double angle )

Set/Get the camera view angle, which is the angular height of the camera view measured in degrees. The default angle is 30 degrees. This method has no effect in parallel projection mode. The formula for setting the angle up for perfect perspective viewing is: angle = 2*atan((h/2)/d) where h is the height of the RenderWindow (measured in mm by holding a ruler up to your screen) and d is the distance from your eyes to the screen.

virtual double vtkCamera::GetViewAngle ( ) [virtual]

Set/Get the camera view angle, which is the angular height of the camera view measured in degrees. The default angle is 30 degrees. This method has no effect in parallel projection mode. The formula for setting the angle up for perfect perspective viewing is: angle = 2*atan((h/2)/d) where h is the height of the RenderWindow (measured in mm by holding a ruler up to your screen) and d is the distance from your eyes to the screen.

void vtkCamera::SetParallelScale ( double scale )

Set/Get the scaling used for a parallel projection, i.e. the height of the viewport in world-coordinate distances. The default is 1. Note that the "scale" parameter works as an "inverse scale" --- larger numbers produce smaller images. This method has no effect in perspective projection mode.

virtual double vtkCamera::GetParallelScale ( ) [virtual]

Set/Get the scaling used for a parallel projection, i.e. the height of the viewport in world-coordinate distances. The default is 1. Note that the "scale" parameter works as an "inverse scale" --- larger numbers produce smaller images. This method has no effect in perspective projection mode.

void vtkCamera::Zoom ( double factor )

In perspective mode, decrease the view angle by the specified factor. In parallel mode, decrease the parallel scale by the specified factor. A value greater than 1 is a zoom-in, a value less than 1 is a zoom-out.

void vtkCamera::SetClippingRange ( double near,

double far

)

Set/Get the location of the near and far clipping planes along the direction of projection. Both of these values must be positive. How the clipping planes are set can have a large impact on how well z-buffering works. In particular the front clipping plane can make a very big difference. Setting it to 0.01 when it really could be 1.0 can have a big impact on your z-buffer resolution farther away. The default clipping range is (0.1,1000).

void vtkCamera::SetClippingRange ( const double a[2] ) [inline]

Set/Get the location of the near and far clipping planes along the direction of projection. Both of these values must be positive. How the clipping planes are set can have a large impact on how well z-buffering works. In particular the front clipping plane can make a very big difference. Setting it to 0.01 when it really could be 1.0 can have a big impact on your z-buffer resolution farther away. The default clipping range is (0.1,1000).
Definition at line 208 of file vtkCamera.h.

virtual double* vtkCamera::GetClippingRange ( ) [virtual]

Set/Get the location of the near and far clipping planes along the direction of projection. Both of these values must be positive. How the clipping planes are set can have a large impact on how well z-buffering works. In particular the front clipping plane can make a very big difference. Setting it to 0.01 when it really could be 1.0 can have a big impact on your z-buffer resolution farther away. The default clipping range is (0.1,1000).

virtual void vtkCamera::GetClippingRange ( double & ,

double &

) [virtual]

Set/Get the location of the near and far clipping planes along the direction of projection. Both of these values must be positive. How the clipping planes are set can have a large impact on how well z-buffering works. In particular the front clipping plane can make a very big difference. Setting it to 0.01 when it really could be 1.0 can have a big impact on your z-buffer resolution farther away. The default clipping range is (0.1,1000).

virtual void vtkCamera::GetClippingRange ( double [2] ) [virtual]

Set/Get the location of the near and far clipping planes along the direction of projection. Both of these values must be positive. How the clipping planes are set can have a large impact on how well z-buffering works. In particular the front clipping plane can make a very big difference. Setting it to 0.01 when it really could be 1.0 can have a big impact on your z-buffer resolution farther away. The default clipping range is (0.1,1000).

void vtkCamera::SetThickness ( double )

Set the distance between clipping planes. This method adjusts the far clipping plane to be set a distance 'thickness' beyond the near clipping plane.

virtual double vtkCamera::GetThickness ( ) [virtual]

Set the distance between clipping planes. This method adjusts the far clipping plane to be set a distance 'thickness' beyond the near clipping plane.

void vtkCamera::SetWindowCenter ( double x,

double y

)

Set/Get the center of the window in viewport coordinates. The viewport coordinate range is ([-1,+1],[-1,+1]). This method is for if you have one window which consists of several viewports, or if you have several screens which you want to act together as one large screen.

virtual double* vtkCamera::GetWindowCenter ( ) [virtual]

Set/Get the center of the window in viewport coordinates. The viewport coordinate range is ([-1,+1],[-1,+1]). This method is for if you have one window which consists of several viewports, or if you have several screens which you want to act together as one large screen.

virtual void vtkCamera::GetWindowCenter ( double & ,

double &

) [virtual]

Set/Get the center of the window in viewport coordinates. The viewport coordinate range is ([-1,+1],[-1,+1]). This method is for if you have one window which consists of several viewports, or if you have several screens which you want to act together as one large screen.

virtual void vtkCamera::GetWindowCenter ( double [2] ) [virtual]

Set/Get the center of the window in viewport coordinates. The viewport coordinate range is ([-1,+1],[-1,+1]). This method is for if you have one window which consists of several viewports, or if you have several screens which you want to act together as one large screen.

void vtkCamera::SetObliqueAngles ( double alpha,

double beta

)

Get/Set the oblique viewing angles. The first angle, alpha, is the angle (measured from the horizontal) that rays along the direction of projection will follow once projected onto the 2D screen. The second angle, beta, is the angle between the view plane and the direction of projection. This creates a shear transform x' = x + dz*cos(alpha)/tan(beta), y' = dz*sin(alpha)/tan(beta) where dz is the distance of the point from the focal plane. The angles are (45,90) by default. Oblique projections commonly use (30,63.435).

void vtkCamera::ApplyTransform ( vtkTransform * t )

Apply a transform to the camera. The camera position, focal-point, and view-up are re-calulated using the transform's matrix to multiply the old points by the new transform.

virtual double* vtkCamera::GetViewPlaneNormal ( ) [virtual]

Get the ViewPlaneNormal. This vector will point opposite to the direction of projection, unless you have created an sheared output view using SetViewShear/SetObliqueAngles.

virtual void vtkCamera::GetViewPlaneNormal ( double & ,

double & ,

double &

) [virtual]

Get the ViewPlaneNormal. This vector will point opposite to the direction of projection, unless you have created an sheared output view using SetViewShear/SetObliqueAngles.

virtual void vtkCamera::GetViewPlaneNormal ( double [3] ) [virtual]

Get the ViewPlaneNormal. This vector will point opposite to the direction of projection, unless you have created an sheared output view using SetViewShear/SetObliqueAngles.

void vtkCamera::SetViewShear ( double dxdz,

double dydz,

double center

)

Set/get the shear transform of the viewing frustum. Parameters are dx/dz, dy/dz, and center. center is a factor that describes where to shear around. The distance dshear from the camera where no shear occurs is given by (dshear = center * FocalDistance).

void vtkCamera::SetViewShear ( double d[3] )

Set/get the shear transform of the viewing frustum. Parameters are dx/dz, dy/dz, and center. center is a factor that describes where to shear around. The distance dshear from the camera where no shear occurs is given by (dshear = center * FocalDistance).

virtual double* vtkCamera::GetViewShear ( ) [virtual]

Set/get the shear transform of the viewing frustum. Parameters are dx/dz, dy/dz, and center. center is a factor that describes where to shear around. The distance dshear from the camera where no shear occurs is given by (dshear = center * FocalDistance).

virtual void vtkCamera::GetViewShear ( double & ,

double & ,

double &

) [virtual]

Set/get the shear transform of the viewing frustum. Parameters are dx/dz, dy/dz, and center. center is a factor that describes where to shear around. The distance dshear from the camera where no shear occurs is given by (dshear = center * FocalDistance).

virtual void vtkCamera::GetViewShear ( double [3] ) [virtual]

Set/get the shear transform of the viewing frustum. Parameters are dx/dz, dy/dz, and center. center is a factor that describes where to shear around. The distance dshear from the camera where no shear occurs is given by (dshear = center * FocalDistance).

virtual void vtkCamera::SetEyeAngle ( double ) [virtual]

Set/Get the separation between eyes (in degrees). This is used when generating stereo images.

virtual double vtkCamera::GetEyeAngle ( ) [virtual]

Set/Get the separation between eyes (in degrees). This is used when generating stereo images.

virtual void vtkCamera::SetFocalDisk ( double ) [virtual]

Set the size of the cameras lens in world coordinates. This is only used when the renderer is doing focal depth rendering. When that is being done the size of the focal disk will effect how significant the depth effects will be.

virtual double vtkCamera::GetFocalDisk ( ) [virtual]

Set the size of the cameras lens in world coordinates. This is only used when the renderer is doing focal depth rendering. When that is being done the size of the focal disk will effect how significant the depth effects will be.

virtual vtkMatrix4x4* vtkCamera::GetViewTransformMatrix ( ) [virtual]

Return the matrix of the view transform.

virtual vtkMatrix4x4* vtkCamera::GetPerspectiveTransformMatrix ( double aspect,

double nearz,

double farz

) [virtual]

Return the perspective transform matrix, which converts from camera coordinates to viewport coordinates. The 'aspect' is the width/height for the viewport, and the nearz and farz are the Z-buffer values that map to the near and far clipping planes. The viewport coordinates are in the range ([-1,+1],[-1,+1],[nearz,farz]).

virtual vtkMatrix4x4* vtkCamera::GetCompositePerspectiveTransformMatrix ( double aspect,

double nearz,

double farz

) [virtual]

Return the concatenation of the ViewTransform and the PerspectiveTransform. This transform will convert world coordinates to viewport coordinates. The 'aspect' is the width/height for the viewport, and the nearz and farz are the Z-buffer values that map to the near and far clipping planes. The viewport coordinates are in the range ([-1,+1],[-1,+1],[nearz,farz]).

void vtkCamera::SetUserTransform ( vtkHomogeneousTransform * transform )

In addition to the instance variables such as position and orientation, you can add an additional transformation for your own use. This transformation is concatenated to the camera's PerspectiveTransform

virtual vtkHomogeneousTransform* vtkCamera::GetUserTransform ( ) [virtual]

In addition to the instance variables such as position and orientation, you can add an additional transformation for your own use. This transformation is concatenated to the camera's PerspectiveTransform

virtual void vtkCamera::Render ( vtkRenderer * ) [inline, virtual]

This method causes the camera to set up whatever is required for viewing the scene. This is actually handled by an subclass of vtkCamera, which is created through New()
Reimplemented in vtkMesaCamera, and vtkOpenGLCamera.
Definition at line 317 of file vtkCamera.h.

unsigned long vtkCamera::GetViewingRaysMTime ( )

Return the MTime that concerns recomputing the view rays of the camera.

void vtkCamera::ViewingRaysModified ( )

Mark that something has changed which requires the view rays to be recomputed.

virtual void vtkCamera::GetFrustumPlanes ( double aspect,

double planes[24]

) [virtual]

Get the plane equations that bound the view frustum. The plane normals point inward. The planes array contains six plane equations of the form (Ax+By+Cz+D=0), the first four values are (A,B,C,D) which repeats for each of the planes. The aspect of the viewport is needed to correctly compute the planes

double* vtkCamera::GetOrientation ( )

Get the orientation of the camera.

double* vtkCamera::GetOrientationWXYZ ( )

Get the orientation of the camera.

void vtkCamera::SetViewPlaneNormal ( double x,

double y,

double z

)

These methods have been deprecated. The view plane normal is automatically set from the DirectionOfProjection according to the ViewShear.

void vtkCamera::SetViewPlaneNormal ( const double a[3] ) [inline]

These methods have been deprecated. The view plane normal is automatically set from the DirectionOfProjection according to the ViewShear.
Definition at line 345 of file vtkCamera.h.

void vtkCamera::ComputeViewPlaneNormal ( )

This method is called automatically whenever necessary, it should never be used outside of vtkCamera.cxx.

vtkMatrix4x4* vtkCamera::GetCameraLightTransformMatrix ( )

Returns a transformation matrix for a coordinate frame attached to the camera, where the camera is located at (0, 0, 1) looking at the focal point at (0, 0, 0), with up being (0, 1, 0).

virtual void vtkCamera::UpdateViewport ( vtkRenderer * vtkNotUsed(ren) ) [inline, virtual]

Update the viewport
Definition at line 359 of file vtkCamera.h.

virtual vtkTransform* vtkCamera::GetViewTransformObject ( ) [inline, virtual]

Definition at line 361 of file vtkCamera.h.

void vtkCamera::ComputeDistance ( ) [protected]

These methods should only be used within vtkCamera.cxx.

void vtkCamera::ComputeViewTransform ( ) [protected]

These methods should only be used within vtkCamera.cxx.

void vtkCamera::ComputePerspectiveTransform ( double aspect,

double nearz,

double farz

) [protected]

These methods should only be used within vtkCamera.cxx.

void vtkCamera::ComputeCompositePerspectiveTransform ( double aspect,

double nearz,

double farz

) [protected]

These methods should only be used within vtkCamera.cxx.

void vtkCamera::ComputeCameraLightTransform ( ) [protected]

These methods should only be used within vtkCamera.cxx.

Member Data Documentation

double vtkCamera::WindowCenter[2] [protected]

Definition at line 377 of file vtkCamera.h.

double vtkCamera::ObliqueAngles[2] [protected]

Definition at line 378 of file vtkCamera.h.

double vtkCamera::FocalPoint[3] [protected]

Definition at line 379 of file vtkCamera.h.

double vtkCamera::Position[3] [protected]

Definition at line 380 of file vtkCamera.h.

double vtkCamera::ViewUp[3] [protected]

Definition at line 381 of file vtkCamera.h.

double vtkCamera::ViewAngle [protected]

Definition at line 382 of file vtkCamera.h.

double vtkCamera::ClippingRange[2] [protected]

Definition at line 383 of file vtkCamera.h.

double vtkCamera::EyeAngle [protected]

Definition at line 384 of file vtkCamera.h.

int vtkCamera::ParallelProjection [protected]

Definition at line 385 of file vtkCamera.h.

double vtkCamera::ParallelScale [protected]

Definition at line 386 of file vtkCamera.h.

int vtkCamera::Stereo [protected]

Definition at line 387 of file vtkCamera.h.

int vtkCamera::LeftEye [protected]

Definition at line 388 of file vtkCamera.h.

double vtkCamera::Thickness [protected]

Definition at line 389 of file vtkCamera.h.

double vtkCamera::Distance [protected]

Definition at line 390 of file vtkCamera.h.

double vtkCamera::DirectionOfProjection[3] [protected]

Definition at line 391 of file vtkCamera.h.

double vtkCamera::ViewPlaneNormal[3] [protected]

Definition at line 392 of file vtkCamera.h.

double vtkCamera::ViewShear[3] [protected]

Definition at line 393 of file vtkCamera.h.

int vtkCamera::UseHorizontalViewAngle [protected]

Definition at line 394 of file vtkCamera.h.

vtkHomogeneousTransform* vtkCamera::UserTransform [protected]

Definition at line 395 of file vtkCamera.h.

vtkTransform* vtkCamera::ViewTransform [protected]

Definition at line 397 of file vtkCamera.h.

vtkPerspectiveTransform* vtkCamera::PerspectiveTransform [protected]

Definition at line 398 of file vtkCamera.h.

vtkPerspectiveTransform* vtkCamera::Transform [protected]

Definition at line 399 of file vtkCamera.h.

vtkTransform* vtkCamera::CameraLightTransform [protected]

Definition at line 400 of file vtkCamera.h.

double vtkCamera::FocalDisk [protected]

Definition at line 402 of file vtkCamera.h.

vtkTimeStamp vtkCamera::ViewingRaysMTime [protected]

Definition at line 407 of file vtkCamera.h.

The documentation for this class was generated from the following file:

dox/Rendering/vtkCamera.h


Public Types
typedef vtkObject	Superclass
Public Member Functions
void	PrintSelf (ostream &os, vtkIndent indent)
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
void	OrthogonalizeViewUp ()
void	SetDistance (double)
void	Dolly (double distance)
void	Roll (double angle)
void	Azimuth (double angle)
void	Yaw (double angle)
void	Elevation (double angle)
void	Pitch (double angle)
void	Zoom (double factor)
void	SetObliqueAngles (double alpha, double beta)
void	ApplyTransform (vtkTransform *t)
virtual vtkMatrix4x4 *	GetViewTransformMatrix ()
virtual void	Render (vtkRenderer *)
unsigned long	GetViewingRaysMTime ()
void	ViewingRaysModified ()
virtual void	GetFrustumPlanes (double aspect, double planes[24])
void	ComputeViewPlaneNormal ()
vtkMatrix4x4 *	GetCameraLightTransformMatrix ()
virtual void	UpdateViewport (vtkRenderer *vtkNotUsed(ren))
virtual vtkTransform *	GetViewTransformObject ()

void	SetPosition (double x, double y, double z)
void	SetPosition (const double a[3])
virtual double *	GetPosition ()
virtual void	GetPosition (double &, double &, double &)
virtual void	GetPosition (double[3])

void	SetFocalPoint (double x, double y, double z)
void	SetFocalPoint (const double a[3])
virtual double *	GetFocalPoint ()
virtual void	GetFocalPoint (double &, double &, double &)
virtual void	GetFocalPoint (double[3])

void	SetViewUp (double vx, double vy, double vz)
void	SetViewUp (const double a[3])
virtual double *	GetViewUp ()
virtual void	GetViewUp (double &, double &, double &)
virtual void	GetViewUp (double[3])

virtual double	GetDistance ()

virtual double *	GetDirectionOfProjection ()
virtual void	GetDirectionOfProjection (double &, double &, double &)
virtual void	GetDirectionOfProjection (double[3])

void	SetRoll (double angle)
double	GetRoll ()

void	SetParallelProjection (int flag)
virtual int	GetParallelProjection ()
virtual void	ParallelProjectionOn ()
virtual void	ParallelProjectionOff ()

void	SetUseHorizontalViewAngle (int flag)
virtual int	GetUseHorizontalViewAngle ()
virtual void	UseHorizontalViewAngleOn ()
virtual void	UseHorizontalViewAngleOff ()

void	SetViewAngle (double angle)
virtual double	GetViewAngle ()

void	SetParallelScale (double scale)
virtual double	GetParallelScale ()

void	SetClippingRange (double near, double far)
void	SetClippingRange (const double a[2])
virtual double *	GetClippingRange ()
virtual void	GetClippingRange (double &, double &)
virtual void	GetClippingRange (double[2])

void	SetThickness (double)
virtual double	GetThickness ()

void	SetWindowCenter (double x, double y)
virtual double *	GetWindowCenter ()
virtual void	GetWindowCenter (double &, double &)
virtual void	GetWindowCenter (double[2])

virtual double *	GetViewPlaneNormal ()
virtual void	GetViewPlaneNormal (double &, double &, double &)
virtual void	GetViewPlaneNormal (double[3])

void	SetViewShear (double dxdz, double dydz, double center)
void	SetViewShear (double d[3])
virtual double *	GetViewShear ()
virtual void	GetViewShear (double &, double &, double &)
virtual void	GetViewShear (double[3])

virtual void	SetEyeAngle (double)
virtual double	GetEyeAngle ()

virtual void	SetFocalDisk (double)
virtual double	GetFocalDisk ()

virtual vtkMatrix4x4 *	GetPerspectiveTransformMatrix (double aspect, double nearz, double farz)

virtual vtkMatrix4x4 *	GetCompositePerspectiveTransformMatrix (double aspect, double nearz, double farz)

void	SetUserTransform (vtkHomogeneousTransform *transform)
virtual vtkHomogeneousTransform *	GetUserTransform ()

double *	GetOrientation ()
double *	GetOrientationWXYZ ()

void	SetViewPlaneNormal (double x, double y, double z)
void	SetViewPlaneNormal (const double a[3])
Static Public Member Functions
int	IsTypeOf (const char *type)
vtkCamera *	SafeDownCast (vtkObject *o)
vtkCamera *	New ()
Protected Member Functions
	vtkCamera ()
	~vtkCamera ()

void	ComputeDistance ()
void	ComputeViewTransform ()
void	ComputePerspectiveTransform (double aspect, double nearz, double farz)
void	ComputeCompositePerspectiveTransform (double aspect, double nearz, double farz)
void	ComputeCameraLightTransform ()
Protected Attributes
double	WindowCenter [2]
double	ObliqueAngles [2]
double	FocalPoint [3]
double	Position [3]
double	ViewUp [3]
double	ViewAngle
double	ClippingRange [2]
double	EyeAngle
int	ParallelProjection
double	ParallelScale
int	Stereo
int	LeftEye
double	Thickness
double	Distance
double	DirectionOfProjection [3]
double	ViewPlaneNormal [3]
double	ViewShear [3]
int	UseHorizontalViewAngle
vtkHomogeneousTransform *	UserTransform
vtkTransform *	ViewTransform
vtkPerspectiveTransform *	PerspectiveTransform
vtkPerspectiveTransform *	Transform
vtkTransform *	CameraLightTransform
double	FocalDisk
vtkTimeStamp	ViewingRaysMTime