Dtk_Camera Class Reference

This is the Camera class.
This class lets you define elements to create frustum.
. More...

Inheritance diagram for Dtk_Camera:

Public Types
enum	ProjectionTypeEnum { ProjectionTypeUnknown = 0, ProjectionTypeParallel, ProjectionTypePerspective }
enum	ZoomFitModeEnum { NoZoomFit = 0, ZoomFitAllScene }

Public Member Functions
virtual Dtk_ErrorStatus	_Store (void *)
Dtk_Double64	Angle () const
Dtk_Int32	DtkDynamicType (const Dtk_Int32 &inId)
	Retrieves the dynamic entity type. More...
int	DtkDynamicType (const int &inId)
virtual void	dump (FILE *file=stdout)
Dtk_Double64	Focus () const
Dtk_InfoPtr	get_info () const
type_detk	get_type_detk () const
void	GetClippingDistance (Dtk_Double64 &outFrontDistance, Dtk_Double64 &outBackDistance) const
	get the Front Clipping Distance et Back Clipping Distance More...
Dtk_Double64	GetFocusDistance () const
	Processes the Focus Distance ie the Distance between the Origin and the Target points - read only -. More...
const Dtk_ID &	GetID () const
	Get Internal UniqueID. More...
Dtk_Double64	GetSemiHeight () const
	Retrieves the Camera Base Semi Height - read only -. More...
Dtk_Double64	GetSemiWidth () const
	Retrieves the Camera Base Semi Width - read only -. More...
virtual Dtk_Size_t	GetSize () const
const Dtk_Camera::ZoomFitModeEnum &	GetZoomFitMode () const
	Retrieves the zoom fit mode - read only -. More...
Dtk_InfoPtr &	info ()
Dtk_bool	IsValid () const
	Checks if the Dtk_Camera is valid. For this: More...
const Dtk_pnt &	OriginPoint () const
	Retrieves the origin point - read only -. More...
virtual void	PrepareTransfo ()
Dtk_Double64	ProcessXSemiAngle () const
	Processes the X - along width - Semi Angle - read only -. More...
Dtk_Double64	ProcessXZoomFactor () const
	Processes the X - along width - zoom factor - read only -. More...
Dtk_Double64	ProcessYSemiAngle () const
	Processes the Y - along height - Semi Angle - read only -. More...
Dtk_Double64	ProcessYZoomFactor () const
	Processes the Y - along height - zoom factor - read only -. More...
const Dtk_Camera::ProjectionTypeEnum &	ProjectionType () const
	Retrieves the projection type - read only -. More...
void	SetClippingDistance (const Dtk_Double64 &inFrontDistance, const Dtk_Double64 &inBackDistance) const
	set the Front Clipping Distance et Back Clipping Distance More...
const Dtk_pnt &	TargetPoint () const
	Retrieves the target point - read only -. More...
Dtk_dir	TargetVector () const
	Retrieves the target vector - read only -. More...
Dtk_ErrorStatus	Transform (const Dtk_transfo &inTransfo)
	Applies a transformation matrix to the entity. //! More...
const Dtk_dir &	UpVector () const
	Retrieves the up vector - read only -. More...
Dtk_Double64	ZoomFactor () const
	Processes the X - width - zoom factor - read only -. More...

Static Public Member Functions
static Dtk_CameraPtr	Create ()
	Calls default constructor to allocate a new object. More...
static Dtk_CameraPtr	Create (const Dtk_pnt &inOriginPoint, const Dtk_pnt &inTarget, const Dtk_dir &inUpVector, const double &inAngle, const double &inFocus, const double &inZoomFactor=1.0, const ProjectionTypeEnum inProjectionType=ProjectionTypeParallel, const ZoomFitModeEnum inZoomFitMode=NoZoomFit)
	Calls full featured constructor to allocate a new object. More...
static Dtk_CameraPtr	Create (const Dtk_pnt &inOriginPoint, const Dtk_pnt &inTarget, const Dtk_Double64 inSemiWidth, const Dtk_Double64 inSemiHeight, const Dtk_dir &inUpVector, const ProjectionTypeEnum inProjectionType=ProjectionTypeParallel, const ZoomFitModeEnum inZoomFitMode=NoZoomFit)
	Calls full featured constructor to allocate a new object. More...
static Dtk_Camera *	DtkDynamicCast (Dtk_Object *s)
	Performs a dynamic cast - doesn't need RTTI -. More...

Protected Types
enum	{ _typeID = DTK_TYPE_OBJECT }
enum	{ _typeID = DTK_TYPE_ENTITY }
enum	{ _typeID = DTK_TYPE_CAMERA }

Protected Member Functions
void	_copy (const Dtk_Entity &s)
void	_init ()
void	_reset ()
virtual Dtk_Object *	Clone ()
	Dtk_Camera ()
	Dtk_Camera (const Dtk_Camera &s)
	~Dtk_Camera ()
	Destructor. More...

Protected Attributes
Dtk_Handle *	_Private
unsigned long	count_

Detailed Description

This is the Camera class.
This class lets you define elements to create frustum.
.

See also

Use Dtk_CameraPtr class to handle it.

The camera can be parallel:

...or perspective:

Member Enumeration Documentation

anonymous enum

anonymous enum

protectedinherited

Enumerator
_typeID

{ _typeID = DTK_TYPE_OBJECT }; 

anonymous enum

anonymous enum

protectedinherited

Enumerator
_typeID

{ _typeID = DTK_TYPE_ENTITY };

anonymous enum

anonymous enum

protected

Enumerator
_typeID

{ _typeID = DTK_TYPE_CAMERA };

ProjectionTypeEnum

enum Dtk_Camera::ProjectionTypeEnum

Enumerator
ProjectionTypeUnknown
ProjectionTypeParallel
ProjectionTypePerspective

                            {
          ProjectionTypeUnknown = 0,
          ProjectionTypeParallel,
          ProjectionTypePerspective
     };

ZoomFitModeEnum

enum Dtk_Camera::ZoomFitModeEnum

Enumerator
NoZoomFit
ZoomFitAllScene

    {
        NoZoomFit = 0,      //The camera doesn't need to be zoom fitted.
        ZoomFitAllScene,    //The camera needs to be zoom fitted to the entire scene.
    };

Constructor & Destructor Documentation

Dtk_Camera() [1/2]

Dtk_Camera::Dtk_Camera ( )

protected

See also

Create()

Dtk_Camera() [2/2]

Dtk_Camera::Dtk_Camera ( const Dtk_Camera &  s )

protected

See also

Create(const Dtk_Camera&)

~Dtk_Camera()

Dtk_Camera::~Dtk_Camera ( )

protected

Destructor.

Member Function Documentation

_copy()

void Dtk_Entity::_copy ( const Dtk_Entity &  s )

protectedinherited

_init()

void Dtk_Entity::_init ( )

protectedinherited

_reset()

void Dtk_Entity::_reset ( )

protectedinherited

_Store()

virtual Dtk_ErrorStatus Dtk_Entity::_Store ( void *  )

virtualinherited

Reimplemented in Dtk_Shell, Dtk_Body, Dtk_Lump, Dtk_Volume, Dtk_Face, Dtk_Loop, Dtk_Coedge, Dtk_Edge, Dtk_Vertex, Dtk_TransformedSurface, Dtk_FilletSurface, Dtk_OffsetSurface, Dtk_SphericalSurface, Dtk_ToroidalSurface, Dtk_ConicalSurface, Dtk_CylindricalSurface, Dtk_RuledSurface, Dtk_LinearExtrusionSurface, Dtk_StandardRevolutionSurface, Dtk_RevolutionSurface, Dtk_PlaneSurface, Dtk_NurbsSurface, Dtk_Surface, Dtk_Hyperbola, Dtk_Parabola, Dtk_Ellipse, Dtk_Conic, Dtk_Line, Dtk_Polyline, Dtk_NurbsCurve, Dtk_Curve, and Dtk_Point.

Angle()

Dtk_Double64 Dtk_Camera::Angle

(

)

const

Deprecated:

Use ProcessXSemiAngle() const or ProcessYSemiAngle() const methods instead.

See also

ProcessXSemiAngle() const

Returns

The X Semi angle in Degrees, 0.0 if Dtk_Camera is not valid.

The angle

{ return ProcessXSemiAngle() * 180. / DTK_PI; }

Clone()

virtual Dtk_Object* Dtk_Camera::Clone ( )

protectedvirtual

Implements Dtk_Entity.

{ return new Dtk_Camera(*this); }

Create() [1/3]

static Dtk_CameraPtr Dtk_Camera::Create ( )

static

Calls default constructor to allocate a new object.

Create() [2/3]

static Dtk_CameraPtr Dtk_Camera::Create ( const Dtk_pnt &  inOriginPoint, const Dtk_pnt &  inTarget, const Dtk_dir &  inUpVector, const double &  inAngle, const double &  inFocus, const double &  inZoomFactor = 1.0, const ProjectionTypeEnum  inProjectionType = ProjectionTypeParallel, const ZoomFitModeEnum  inZoomFitMode = NoZoomFit  )

static

Calls full featured constructor to allocate a new object.

Deprecated:

Use Create( const Dtk_pnt& inOriginPoint, const Dtk_pnt& inTarget, const Dtk_dir& inUpVector, const Dtk_Double64 inSemiWidth, const Dtk_Double64 inSemiHeight, const ProjectionTypeEnum& inProjectionType, const ZoomFitModeEnum inZoomFitMode) method instead.

Parameters

inOriginPoint	The Dtk_Camera location point
inTarget	The Target vector
inUpVector	The Up vector
inAngle	The angle - in Degrees - - will be used to process Semi-Width/Semi-Height -
inFocus	The focus - This value will be ignored -
inZoomFactor	The zoom factor - 1.0 by default - - This value will be ignored -
inProjectionType	The projection type - ProjectionTypeParallel by default -
inZoomFitMode	The Zoom Fit Mode - NoZoomFit by default -

Returns

The created Dtk_CameraPtr

Create() [3/3]

static Dtk_CameraPtr Dtk_Camera::Create ( const Dtk_pnt &  inOriginPoint, const Dtk_pnt &  inTarget, const Dtk_Double64  inSemiWidth, const Dtk_Double64  inSemiHeight, const Dtk_dir &  inUpVector, const ProjectionTypeEnum  inProjectionType = ProjectionTypeParallel, const ZoomFitModeEnum  inZoomFitMode = NoZoomFit  )

static

Calls full featured constructor to allocate a new object.

Parameters

inOriginPoint	The Dtk_Camera location point
inTarget	The Target vector
inSemiWidth	Semi-Width of the Pyramid/Block Camera Frustum - in mm -
inSemiHeight	Semi-Height of the Pyramid/Block Camera Frustum - in mm -
inUpVector	The Up vector
inProjectionType	The projection type - ProjectionTypeParallel by default -
inZoomFitMode	The Zoom Fit Mode - NoZoomFit by default -

Returns

The created Dtk_CameraPtr

DtkDynamicCast()

static Dtk_Camera* Dtk_Camera::DtkDynamicCast ( Dtk_Object *  s )

static

Performs a dynamic cast - doesn't need RTTI -.

DtkDynamicType() [1/2]

Dtk_Int32 Dtk_Camera::DtkDynamicType

(

const Dtk_Int32 &

inId

)

Retrieves the dynamic entity type.

DtkDynamicType() [2/2]

int Dtk_Entity::DtkDynamicType ( const int &  inId )

virtualinherited

Implements Dtk_Object.

Reimplemented in Dtk_Shell, Dtk_Body, Dtk_Lump, Dtk_Volume, Dtk_Face, Dtk_Loop, Dtk_Coedge, Dtk_Edge, Dtk_Vertex, Dtk_TopologicalEntity, Dtk_MeshSurface, Dtk_TransformedSurface, Dtk_FilletSurface, Dtk_OffsetSurface, Dtk_SphericalSurface, Dtk_ToroidalSurface, Dtk_ConicalSurface, Dtk_CylindricalSurface, Dtk_RuledSurface, Dtk_LinearExtrusionSurface, Dtk_StandardRevolutionSurface, Dtk_RevolutionSurface, Dtk_PlaneSurface, Dtk_NurbsSurface, Dtk_Surface, Dtk_Hyperbola, Dtk_Parabola, Dtk_Ellipse, Dtk_Conic, Dtk_Line, Dtk_Polyline, Dtk_NurbsCurve, Dtk_Curve, Dtk_Point, Dtk_Constraint, Dtk_ConstraintReference, and Dtk_AxisSystem.

dump()

virtual void Dtk_Object::dump ( FILE *  file = stdout )

virtualinherited

Focus()

Dtk_Double64 Dtk_Camera::Focus

(

)

const

Deprecated:

This method has been superseed by GetFocusDistance() const method.

See also

GetFocusDistance() const

{ return GetFocusDistance(); }

get_info()

Dtk_InfoPtr Dtk_Entity::get_info ( ) const

inherited

get_type_detk()

type_detk Dtk_Camera::get_type_detk ( ) const

virtual

Returns

The type of the entity type - DTK_TYPE_CAMERA -

Implements Dtk_Entity.

{ return DTK_TYPE_CAMERA; }

GetClippingDistance()

void Dtk_Camera::GetClippingDistance	(	Dtk_Double64 &	outFrontDistance,
		Dtk_Double64 &	outBackDistance
	)		const

get the Front Clipping Distance et Back Clipping Distance

GetFocusDistance()

Dtk_Double64 Dtk_Camera::GetFocusDistance

(

)

const

Processes the Focus Distance ie the Distance between the Origin and the Target points - read only -.

Returns

The Focus Distance in mm.

GetID()

const Dtk_ID& Dtk_Entity::GetID ( ) const

inherited

Get Internal UniqueID.

Returns

InternalID

GetSemiHeight()

Dtk_Double64 Dtk_Camera::GetSemiHeight

(

)

const

Retrieves the Camera Base Semi Height - read only -.

Returns

The Base Height in mm.

GetSemiWidth()

Dtk_Double64 Dtk_Camera::GetSemiWidth

(

)

const

Retrieves the Camera Base Semi Width - read only -.

Returns

The Base Width in mm.

GetSize()

virtual Dtk_Size_t Dtk_Entity::GetSize ( ) const

virtualinherited

Reimplemented from Dtk_Object.

Reimplemented in Dtk_Shell, Dtk_Body, Dtk_Lump, Dtk_Volume, Dtk_Face, Dtk_Loop, Dtk_Coedge, Dtk_Edge, Dtk_Vertex, Dtk_mesh, Dtk_TransformedSurface, Dtk_FilletSurface, Dtk_OffsetSurface, Dtk_SphericalSurface, Dtk_ToroidalSurface, Dtk_ConicalSurface, Dtk_CylindricalSurface, Dtk_RuledSurface, Dtk_LinearExtrusionSurface, Dtk_StandardRevolutionSurface, Dtk_RevolutionSurface, Dtk_PlaneSurface, Dtk_NurbsSurface, Dtk_Surface, Dtk_Hyperbola, Dtk_Parabola, Dtk_Ellipse, Dtk_Conic, Dtk_Line, Dtk_Polyline, Dtk_NurbsCurve, Dtk_Curve, and Dtk_Point.

GetZoomFitMode()

const Dtk_Camera::ZoomFitModeEnum& Dtk_Camera::GetZoomFitMode

(

)

const

Retrieves the zoom fit mode - read only -.

Returns

The zoom fit mode

info()

Dtk_InfoPtr& Dtk_Entity::info ( )

inherited

IsValid()

Dtk_bool Dtk_Camera::IsValid

(

)

const

Checks if the Dtk_Camera is valid. For this:

• The Focus Distance must be >= DTK_TOLERANCE.
• The Semi-Width must be >= DTK_TOLERANCE.
• The Semi-Height must be >= DTK_TOLERANCE.

  Returns

  DTK_TRUE if the Dtk_Camera is valid, DTK_FALSE otherwise.

    {
        if( GetFocusDistance() < DTK_TOLERANCE ||
            GetSemiWidth() < DTK_TOLERANCE ||
            GetSemiHeight() < DTK_TOLERANCE )
        {
            return DTK_FALSE;
        }
        else
        {
            return DTK_TRUE;
        }
    }

OriginPoint()

const Dtk_pnt& Dtk_Camera::OriginPoint

(

)

const

Retrieves the origin point - read only -.

Returns

The origin point

PrepareTransfo()

virtual void Dtk_Entity::PrepareTransfo ( )

virtualinherited

Reimplemented in Dtk_OffsetSurface.

ProcessXSemiAngle()

Dtk_Double64 Dtk_Camera::ProcessXSemiAngle

(

)

const

Processes the X - along width - Semi Angle - read only -.

Returns

The X Semi-Angle in Radians, 0.0 if Dtk_Camera is not valid.

Remarks

The X Semi-Angle is equal to atan( GetSemiWidth() / GetFocusDistance() )

The X Semi-Angle is relevant for Perspective Camera.

{ return IsValid() ? ( atan( GetSemiWidth() / GetFocusDistance() ) ) : 0.; }

ProcessXZoomFactor()

Dtk_Double64 Dtk_Camera::ProcessXZoomFactor

(

)

const

Processes the X - along width - zoom factor - read only -.

Returns

The X zoom factor, 0.0 if Dtk_Camera is not valid.

Remarks

The X Zoom Factor is equal to 1. / GetSemiWidth()

The X Zoom Factor is relevant for Parallel Camera.

{ return IsValid() ? ( 1. / GetSemiWidth() ) : 0.; }

ProcessYSemiAngle()

Dtk_Double64 Dtk_Camera::ProcessYSemiAngle

(

)

const

Processes the Y - along height - Semi Angle - read only -.

Returns

The Y Semi-Angle in Radians, 0.0 if Dtk_Camera is not valid.

Remarks

The Y Semi-Angle is equal to atan( GetSemiHeight() / GetFocusDistance() )

The Y Semi-Angle is relevant for Perspective Camera.

{ return IsValid() ? ( atan( GetSemiHeight() / GetFocusDistance() ) ) : 0.; }

ProcessYZoomFactor()

Dtk_Double64 Dtk_Camera::ProcessYZoomFactor

(

)

const

Processes the Y - along height - zoom factor - read only -.

Returns

The Y zoom factor, 0.0 if Dtk_Camera is not valid.

Remarks

The Y Zoom Factor is equal to 1. / GetSemiHeight()

The Y Zoom Factor is relevant for Parallel Camera.

{ return IsValid() ? ( 1. / GetSemiHeight() ) : 0.; }

ProjectionType()

const Dtk_Camera::ProjectionTypeEnum& Dtk_Camera::ProjectionType

(

)

const

Retrieves the projection type - read only -.

Returns

The projection type

SetClippingDistance()

void Dtk_Camera::SetClippingDistance	(	const Dtk_Double64 &	inFrontDistance,
		const Dtk_Double64 &	inBackDistance
	)		const

set the Front Clipping Distance et Back Clipping Distance

TargetPoint()

const Dtk_pnt& Dtk_Camera::TargetPoint

(

)

const

Retrieves the target point - read only -.

Returns

The target point

TargetVector()

Dtk_dir Dtk_Camera::TargetVector

(

)

const

Retrieves the target vector - read only -.

Deprecated:

Use TargetPoint() const method instead.

Returns

The target vector

Transform()

Dtk_ErrorStatus Dtk_Camera::Transform ( const Dtk_transfo &  inTransfo )

virtual

Applies a transformation matrix to the entity. //!

Parameters

inTransfo

The transformation matrix to apply.

Returns

dtkErrorUnspecified if the resulting Dtk_Camera is not valid, DtkNoError otherwise.

Implements Dtk_Entity.

UpVector()

const Dtk_dir& Dtk_Camera::UpVector

(

)

const

Retrieves the up vector - read only -.

Returns

The up vector

ZoomFactor()

Dtk_Double64 Dtk_Camera::ZoomFactor

(

)

const

Processes the X - width - zoom factor - read only -.

Deprecated:

Use ProcessXZoomFactor() const or ProcessYZoomFactor() const methods instead.

See also

ProcessXZoomFactor() const, 0.0 if Dtk_Camera is not valid.

Returns

The X zoom factor

{ return ProcessXZoomFactor(); }

Field Documentation

_Private

Dtk_Handle* Dtk_Camera::_Private

protected

count_

unsigned long Dtk_Object::count_

protectedinherited