Class for drawing 2D primitives to a graphical context. More...

#include <vtkContext2D.h>

Inheritance diagram for vtkContext2D:

Collaboration diagram for vtkContext2D:

Public Types
typedef vtkObject	Superclass

Public Member Functions
virtual vtkTypeBool	IsA (const char *type)
	Return 1 if this class is the same type of (or a subclass of) the named class.

vtkContext2D *	NewInstance () const

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.

bool	Begin (vtkContextDevice2D *device)
	Begin painting on a vtkContextDevice2D, no painting can occur before this call has been made.

virtual vtkContextDevice2D *	GetDevice ()

bool	End ()
	Ends painting on the device, you would not usually need to call this as it should be called by the destructor.

bool	GetBufferIdMode () const
	Tell if the context is in BufferId creation mode.

void	BufferIdModeBegin (vtkAbstractContextBufferId *bufferId)
	Start BufferId creation Mode.

void	BufferIdModeEnd ()
	Finalize BufferId creation Mode.

void	DrawLine (float x1, float y1, float x2, float y2)
	Draw a line between the specified points.

void	DrawLine (float p[4])
	Draw a line between the specified points.

void	DrawLine (vtkPoints2D *points)
	Draw a line between the specified points.

void	DrawPoly (float x, float y, int n)
	Draw a poly line between the specified points.

void	DrawPoly (vtkPoints2D *points)
	Draw a poly line between the specified points - fastest code path due to memory layout of the coordinates.

void	DrawPoly (float *points, int n)
	Draw a poly line between the specified points, where the float array is of size 2*n and the points are packed x1, y1, x2, y2 etc.

void	DrawPoly (float points, int n, unsigned char colors, int nc_comps)
	Draw a poly line between the specified points, where the float array is of size 2*n and the points are packed x1, y1, x2, y2 etc.

void	DrawLines (vtkPoints2D *points)
	Draw multiple lines between the specified pairs of points.

void	DrawLines (float *points, int n)
	Draw multiple lines between the specified pairs of points.

void	DrawPoint (float x, float y)
	Draw a point at the supplied x and y coordinate.

void	DrawPoints (float x, float y, int n)
	Draw the specified number of points using the x and y arrays supplied.

void	DrawPoints (vtkPoints2D *points)
	Draw a poly line between the specified points - fastest code path due to memory layout of the coordinates.

void	DrawPoints (float *points, int n)
	Draw a poly line between the specified points, where the float array is of size 2*n and the points are packed x1, y1, x2, y2 etc.

void	DrawPointSprites (vtkImageData sprite, vtkPoints2D points)
	Draw a series of point sprites, images centred at the points supplied.

void	DrawPointSprites (vtkImageData sprite, float points, int n)
	Draw a series of point sprites, images centred at the points supplied.

void	DrawRect (float x, float y, float w, float h)
	Draw a rectangle with origin at x, y and width w, height h.

void	DrawPolygon (float x, float y, int n)
	Draw a polygon specified specified by the points using the x and y arrays supplied.

void	DrawPolygon (vtkPoints2D *points)
	Draw a polygon defined by the specified points - fastest code path due to memory layout of the coordinates.

void	DrawPolygon (float *points, int n)
	Draw a polygon defined by the specified points, where the float array is of size 2*n and the points are packed x1, y1, x2, y2 etc.

void	DrawPolygon (float x, float y, int n, unsigned char *color, int nc_comps)
	Draw a polygon specified specified by the points using the x and y arrays supplied.

void	DrawPolygon (vtkPoints2D points, unsigned char color, int nc_comps)
	Draw a polygon defined by the specified points - fastest code path due to memory layout of the coordinates.

void	DrawPolygon (float points, int n, unsigned char color, int nc_comps)
	Draw a polygon defined by the specified points, where the float array is of size 2*n and the points are packed x1, y1, x2, y2 etc.

void	DrawEllipse (float x, float y, float rx, float ry)
	Draw an ellipse with center at x, y and radii rx, ry.

void	DrawWedge (float x, float y, float outRadius, float inRadius, float startAngle, float stopAngle)
	Draw a circular wedge with center at x, y, outer radius outRadius, inner radius inRadius between angles startAngle and stopAngle (expressed in degrees).

void	DrawEllipseWedge (float x, float y, float outRx, float outRy, float inRx, float inRy, float startAngle, float stopAngle)
	Draw an elliptic wedge with center at x, y, outer radii outRx, outRy, inner radii inRx, inRy between angles startAngle and stopAngle (expressed in degrees).

void	DrawArc (float x, float y, float r, float startAngle, float stopAngle)
	Draw a circular arc with center at x,y with radius r between angles startAngle and stopAngle (expressed in degrees).

void	DrawEllipticArc (float x, float y, float rX, float rY, float startAngle, float stopAngle)
	Draw an elliptic arc with center at x,y with radii rX and rY between angles startAngle and stopAngle (expressed in degrees).

void	DrawImage (float x, float y, vtkImageData *image)
	Draw the supplied image at the given x, y location (bottom corner).

void	DrawImage (float x, float y, float scale, vtkImageData *image)
	Draw the supplied image at the given x, y location (bottom corner).

void	DrawImage (const vtkRectf &pos, vtkImageData *image)
	Draw the supplied image at the given position.

void	DrawPolyData (float x, float y, vtkPolyData polyData, vtkUnsignedCharArray colors, int scalarMode)
	Draw the supplied polyData at the given x, y position (bottom corner).

void	ComputeJustifiedStringBounds (const char *string, float bounds[4])
	Compute the bounds of the supplied string while taking into account the justification and rotation of the currently applied text property.

int	ComputeFontSizeForBoundedString (const vtkStdString &string, float width, float height)
	Calculate the largest possible font size where the supplied string will fit within the specified bounds.

bool	MathTextIsSupported ()
	Return true if MathText rendering available on the current device.

void	ApplyPen (vtkPen *pen)
	Apply the supplied pen which controls the outlines of shapes, as well as lines, points and related primitives.

vtkPen *	GetPen ()
	Get the pen which controls the outlines of shapes, as well as lines, points and related primitives.

void	ApplyBrush (vtkBrush *brush)
	Apply the supplied brush which controls the outlines of shapes, as well as lines, points and related primitives.

vtkBrush *	GetBrush ()
	Get the pen which controls the outlines of shapes as well as lines, points and related primitives.

void	ApplyTextProp (vtkTextProperty *prop)
	Apply the supplied text property which controls how text is rendered.

vtkTextProperty *	GetTextProp ()
	Get the text properties object for the vtkContext2D.

void	SetTransform (vtkTransform2D *transform)
	Set the transform for the context, the underlying device will use the matrix of the transform.

vtkTransform2D *	GetTransform ()
	Compute the current transform applied to the context.

void	AppendTransform (vtkTransform2D *transform)
	Append the transform for the context, the underlying device will use the matrix of the transform.

void	ApplyId (vtkIdType id)
	Apply id as a color.


void	DrawPointSprites (vtkImageData sprite, vtkPoints2D points, vtkUnsignedCharArray *colors)
	Draw a series of point sprites, images centred at the points supplied.

void	DrawPointSprites (vtkImageData sprite, float points, int n, unsigned char *colors, int nc_comps)
	Draw a series of point sprites, images centred at the points supplied.


virtual void	DrawMarkers (int shape, bool highlight, float points, int n, unsigned char colors, int nc_comps)
	Draw a series of markers centered at the points supplied.

virtual void	DrawMarkers (int shape, bool highlight, float *points, int n)
	Draw a series of markers centered at the points supplied.

virtual void	DrawMarkers (int shape, bool highlight, vtkPoints2D *points)
	Draw a series of markers centered at the points supplied.

virtual void	DrawMarkers (int shape, bool highlight, vtkPoints2D points, vtkUnsignedCharArray colors)
	Draw a series of markers centered at the points supplied.


void	DrawQuad (float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4)
	Draw a quadrilateral at the specified points (4 points, 8 floats in x, y).

void	DrawQuad (float *p)
	Draw a quadrilateral at the specified points (4 points, 8 floats in x, y).


void	DrawQuadStrip (vtkPoints2D *points)
	Draw a strip of quads.

void	DrawQuadStrip (float *p, int n)
	Draw a strip of quads.


void	DrawStringRect (vtkPoints2D *rect, const vtkStdString &string)
	Draw some text to the screen in a bounding rectangle with the alignment of the text properties respecting the rectangle.

void	DrawStringRect (vtkPoints2D *rect, const vtkUnicodeString &string)
	Draw some text to the screen in a bounding rectangle with the alignment of the text properties respecting the rectangle.

void	DrawStringRect (vtkPoints2D rect, const char string)
	Draw some text to the screen in a bounding rectangle with the alignment of the text properties respecting the rectangle.

void	DrawStringRect (const float rect[4], const vtkStdString &string)
	Draw some text to the screen in a bounding rectangle with the alignment of the text properties respecting the rectangle.

void	DrawStringRect (const float rect[4], const vtkUnicodeString &string)
	Draw some text to the screen in a bounding rectangle with the alignment of the text properties respecting the rectangle.

void	DrawStringRect (const float rect[4], const char *string)
	Draw some text to the screen in a bounding rectangle with the alignment of the text properties respecting the rectangle.


void	DrawString (vtkPoints2D *point, const vtkStdString &string)
	Draw some text to the screen.

void	DrawString (float x, float y, const vtkStdString &string)
	Draw some text to the screen.

void	DrawString (vtkPoints2D *point, const vtkUnicodeString &string)
	Draw some text to the screen.

void	DrawString (float x, float y, const vtkUnicodeString &string)
	Draw some text to the screen.

void	DrawString (vtkPoints2D point, const char string)
	Draw some text to the screen.

void	DrawString (float x, float y, const char *string)
	Draw some text to the screen.


void	ComputeStringBounds (const vtkStdString &string, vtkPoints2D *bounds)
	Compute the bounds of the supplied string.

void	ComputeStringBounds (const vtkStdString &string, float bounds[4])
	Compute the bounds of the supplied string.

void	ComputeStringBounds (const vtkUnicodeString &string, vtkPoints2D *bounds)
	Compute the bounds of the supplied string.

void	ComputeStringBounds (const vtkUnicodeString &string, float bounds[4])
	Compute the bounds of the supplied string.

void	ComputeStringBounds (const char string, vtkPoints2D bounds)
	Compute the bounds of the supplied string.

void	ComputeStringBounds (const char *string, float bounds[4])
	Compute the bounds of the supplied string.


void	DrawMathTextString (vtkPoints2D *point, const vtkStdString &string)
	Draw a MathText formatted equation to the screen.

void	DrawMathTextString (float x, float y, const vtkStdString &string)
	Draw a MathText formatted equation to the screen.

void	DrawMathTextString (vtkPoints2D point, const char string)
	Draw a MathText formatted equation to the screen.

void	DrawMathTextString (float x, float y, const char *string)
	Draw a MathText formatted equation to the screen.


void	DrawMathTextString (vtkPoints2D *point, const vtkStdString &string, const vtkStdString &fallback)
	Draw a MathText formatted equation to the screen.

void	DrawMathTextString (float x, float y, const vtkStdString &string, const vtkStdString &fallback)
	Draw a MathText formatted equation to the screen.

void	DrawMathTextString (vtkPoints2D point, const char string, const char *fallback)
	Draw a MathText formatted equation to the screen.

void	DrawMathTextString (float x, float y, const char string, const char fallback)
	Draw a MathText formatted equation to the screen.


void	PushMatrix ()
	Push/pop the transformation matrix for the painter (sets the underlying matrix for the device when available).

void	PopMatrix ()
	Push/pop the transformation matrix for the painter (sets the underlying matrix for the device when available).


virtual vtkContext3D *	GetContext3D ()
	Get the vtkContext3D device, in order to do some 3D rendering.

virtual void	SetContext3D (vtkContext3D *context)
	Get the vtkContext3D device, in order to do some 3D rendering.

Public Member Functions inherited from vtkObject
	vtkBaseTypeMacro (vtkObject, vtkObjectBase)

virtual void	DebugOn ()
	Turn debugging output on.

virtual void	DebugOff ()
	Turn debugging output off.

bool	GetDebug ()
	Get the value of the debug flag.

void	SetDebug (bool debugFlag)
	Set the value of the debug flag.

virtual void	Modified ()
	Update the modification time for this object.

virtual vtkMTimeType	GetMTime ()
	Return this object's modified time.

void	PrintSelf (ostream &os, vtkIndent indent) override
	Methods invoked by print to print information about the object including superclasses.

void	RemoveObserver (unsigned long tag)

void	RemoveObservers (unsigned long event)

void	RemoveObservers (const char *event)

void	RemoveAllObservers ()

vtkTypeBool	HasObserver (unsigned long event)

vtkTypeBool	HasObserver (const char *event)

int	InvokeEvent (unsigned long event)

int	InvokeEvent (const char *event)

unsigned long	AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

unsigned long	AddObserver (const char event, vtkCommand , float priority=0.0f)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkCommand *	GetCommand (unsigned long tag)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObserver (vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObservers (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

void	RemoveObservers (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkTypeBool	HasObserver (unsigned long event, vtkCommand *)
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

vtkTypeBool	HasObserver (const char event, vtkCommand )
	Allow people to add/remove/invoke observers (callbacks) to any VTK object.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, void(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Overloads to AddObserver that allow developers to add class member functions as callbacks for events.

template<class U , class T >
unsigned long	AddObserver (unsigned long event, U observer, bool(T::callback)(vtkObject , unsigned long, void *), float priority=0.0f)
	Allow user to set the AbortFlagOn() with the return value of the callback method.

int	InvokeEvent (unsigned long event, void *callData)
	This method invokes an event and return whether the event was aborted or not.

int	InvokeEvent (const char event, void callData)
	This method invokes an event and return whether the event was aborted or not.

Public Member Functions inherited from vtkObjectBase
const char *	GetClassName () const
	Return the class name as a string.

virtual vtkTypeBool	IsA (const char *name)
	Return 1 if this class is the same type of (or a subclass of) the named class.

virtual vtkIdType	GetNumberOfGenerationsFromBase (const char *name)
	Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

virtual void	Delete ()
	Delete a VTK object.

virtual void	FastDelete ()
	Delete a reference to this object.

void	InitializeObjectBase ()

void	Print (ostream &os)
	Print an object to an ostream.

virtual void	Register (vtkObjectBase *o)
	Increase the reference count (mark as used by another object).

virtual void	UnRegister (vtkObjectBase *o)
	Decrease the reference count (release by another object).

int	GetReferenceCount ()
	Return the current reference count of this object.

void	SetReferenceCount (int)
	Sets the reference count.

bool	GetIsInMemkind () const
	A local state flag that remembers whether this object lives in the normal or extended memory space.

virtual void	PrintHeader (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.

virtual void	PrintTrailer (ostream &os, vtkIndent indent)
	Methods invoked by print to print information about the object including superclasses.

Static Public Member Functions
static vtkTypeBool	IsTypeOf (const char *type)

static vtkContext2D *	SafeDownCast (vtkObjectBase *o)

static vtkContext2D *	New ()
	Creates a 2D Painter object.

static int	FloatToInt (float x)
	Float to int conversion, performs truncation but with a rounding tolerance for float values that are within 1/256 of their closest integer.

Static Public Member Functions inherited from vtkObject
static vtkObject *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

static void	BreakOnError ()
	This method is called when vtkErrorMacro executes.

static void	SetGlobalWarningDisplay (int val)
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static void	GlobalWarningDisplayOn ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static void	GlobalWarningDisplayOff ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

static int	GetGlobalWarningDisplay ()
	This is a global flag that controls whether any debug, warning or error messages are displayed.

Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool	IsTypeOf (const char *name)
	Return 1 if this class type is the same type of (or a subclass of) the named class.

static vtkIdType	GetNumberOfGenerationsFromBaseType (const char *name)
	Given a the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).

static vtkObjectBase *	New ()
	Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

static void	SetMemkindDirectory (const char *directoryname)
	The name of a directory, ideally mounted -o dax, to memory map an extended memory space within.

static bool	GetUsingMemkind ()
	A global state flag that controls whether vtkObjects are constructed in the usual way (the default) or within the extended memory space.

Protected Member Functions
virtual vtkObjectBase *	NewInstanceInternal () const

	vtkContext2D ()

	~vtkContext2D () override

Protected Member Functions inherited from vtkObject
	vtkObject ()

	~vtkObject () override

void	RegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override

void	InternalGrabFocus (vtkCommand mouseEvents, vtkCommand keypressEvents=nullptr)
	These methods allow a command to exclusively grab all events.

void	InternalReleaseFocus ()
	These methods allow a command to exclusively grab all events.

Protected Member Functions inherited from vtkObjectBase
	vtkObjectBase ()

virtual	~vtkObjectBase ()

virtual void	RegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	UnRegisterInternal (vtkObjectBase *, vtkTypeBool check)

virtual void	ReportReferences (vtkGarbageCollector *)

	vtkObjectBase (const vtkObjectBase &)

void	operator= (const vtkObjectBase &)

Protected Attributes
vtkContextDevice2D *	Device

vtkTransform2D *	Transform

vtkAbstractContextBufferId *	BufferId

vtkContext3D *	Context3D

Protected Attributes inherited from vtkObject
bool	Debug

vtkTimeStamp	MTime

vtkSubjectHelper *	SubjectHelper

Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t >	ReferenceCount

vtkWeakPointerBase **	WeakPointers

Additional Inherited Members
Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction	GetCurrentMallocFunction ()

static vtkReallocingFunction	GetCurrentReallocFunction ()

static vtkFreeingFunction	GetCurrentFreeFunction ()

static vtkFreeingFunction	GetAlternateFreeFunction ()

Detailed Description

Class for drawing 2D primitives to a graphical context.

This defines the interface for drawing onto a 2D context. The context must be set up with a vtkContextDevice2D derived class that provides the functions to facilitate the low level calls to the context. Currently only an OpenGL based device is provided, but this could be extended in the future.

Online Examples:

Diagram

Definition at line 72 of file vtkContext2D.h.

Member Typedef Documentation

◆ Superclass

typedef vtkObject vtkContext2D::Superclass

Definition at line 75 of file vtkContext2D.h.

Constructor & Destructor Documentation

◆ vtkContext2D()

vtkContext2D::vtkContext2D ( )

protected

◆ ~vtkContext2D()

vtkContext2D::~vtkContext2D ( )

overrideprotected

Member Function Documentation

◆ IsTypeOf()

static vtkTypeBool vtkContext2D::IsTypeOf ( const char * type )

static

◆ IsA()

virtual vtkTypeBool vtkContext2D::IsA ( const char * name )

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 vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkObjectBase.

◆ SafeDownCast()

static vtkContext2D * vtkContext2D::SafeDownCast ( vtkObjectBase * o )

static

◆ NewInstanceInternal()

virtual vtkObjectBase * vtkContext2D::NewInstanceInternal ( ) const

protectedvirtual

◆ NewInstance()

vtkContext2D * vtkContext2D::NewInstance ( ) const

◆ PrintSelf()

void vtkContext2D::PrintSelf	(	ostream &	os,
		vtkIndent	indent
	)

overridevirtual

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.

◆ New()

static vtkContext2D * vtkContext2D::New ( )

static

Creates a 2D Painter object.

◆ Begin()

bool vtkContext2D::Begin ( vtkContextDevice2D * device )

Begin painting on a vtkContextDevice2D, no painting can occur before this call has been made.

Only one painter is allowed at a time on any given paint device. Returns true if successful, otherwise false.

◆ GetDevice()

virtual vtkContextDevice2D * vtkContext2D::GetDevice ( )

virtual

◆ End()

bool vtkContext2D::End ( )

Ends painting on the device, you would not usually need to call this as it should be called by the destructor.

Returns true if the painter is no longer active, otherwise false.

◆ GetBufferIdMode()

bool vtkContext2D::GetBufferIdMode ( ) const

Tell if the context is in BufferId creation mode.

Initial value is false.

◆ BufferIdModeBegin()

void vtkContext2D::BufferIdModeBegin ( vtkAbstractContextBufferId * bufferId )

Start BufferId creation Mode.

Precondition: not_yet: !GetBufferIdMode(); bufferId_exists: bufferId!=0

Postcondition: started: GetBufferIdMode()

◆ BufferIdModeEnd()

void vtkContext2D::BufferIdModeEnd ( )

Finalize BufferId creation Mode.

It makes sure that the content of the bufferId passed in argument of BufferIdModeBegin() is correctly set.

Precondition: started: GetBufferIdMode()

Postcondition: done: !GetBufferIdMode()

◆ DrawLine() [1/3]

void vtkContext2D::DrawLine	(	float	x1,
		float	y1,
		float	x2,
		float	y2
	)

Draw a line between the specified points.

◆ DrawLine() [2/3]

void vtkContext2D::DrawLine ( float p[4] )

Draw a line between the specified points.

◆ DrawLine() [3/3]

void vtkContext2D::DrawLine ( vtkPoints2D * points )

Draw a line between the specified points.

Note: Fastest path - points packed in x and y.

◆ DrawPoly() [1/4]

void vtkContext2D::DrawPoly	(	float *	x,
		float *	y,
		int	n
	)

Draw a poly line between the specified points.

◆ DrawPoly() [2/4]

void vtkContext2D::DrawPoly ( vtkPoints2D * points )

Draw a poly line between the specified points - fastest code path due to memory layout of the coordinates.

◆ DrawPoly() [3/4]

void vtkContext2D::DrawPoly	(	float *	points,
		int	n
	)

Draw a poly line between the specified points, where the float array is of size 2*n and the points are packed x1, y1, x2, y2 etc.

Note: Fastest code path - points packed in x and y.

◆ DrawPoly() [4/4]

void vtkContext2D::DrawPoly	(	float *	points,
		int	n,
		unsigned char *	colors,
		int	nc_comps
	)

Draw a poly line between the specified points, where the float array is of size 2*n and the points are packed x1, y1, x2, y2 etc.

The line will be colored by the colors array, which must have nc_comps components (defining a single color). Note: Fastest code path - points packed in x and y.

◆ DrawLines() [1/2]

void vtkContext2D::DrawLines ( vtkPoints2D * points )

Draw multiple lines between the specified pairs of points.

See also: DrawPoly()

◆ DrawLines() [2/2]

void vtkContext2D::DrawLines	(	float *	points,
		int	n
	)

Draw multiple lines between the specified pairs of points.

See also: DrawPoly()

◆ DrawPoint()

void vtkContext2D::DrawPoint	(	float	x,
		float	y
	)

Draw a point at the supplied x and y coordinate.

◆ DrawPoints() [1/3]

void vtkContext2D::DrawPoints	(	float *	x,
		float *	y,
		int	n
	)

Draw the specified number of points using the x and y arrays supplied.

◆ DrawPoints() [2/3]

void vtkContext2D::DrawPoints ( vtkPoints2D * points )

Draw a poly line between the specified points - fastest code path due to memory layout of the coordinates.

◆ DrawPoints() [3/3]

void vtkContext2D::DrawPoints	(	float *	points,
		int	n
	)

Draw a poly line between the specified points, where the float array is of size 2*n and the points are packed x1, y1, x2, y2 etc.

Note: Fastest code path - points packed in x and y.

◆ DrawPointSprites() [1/4]

void vtkContext2D::DrawPointSprites	(	vtkImageData *	sprite,
		vtkPoints2D *	points
	)

Draw a series of point sprites, images centred at the points supplied.

The supplied vtkImageData is the sprite to be drawn, only squares will be drawn and the size is set using SetPointSize.

◆ DrawPointSprites() [2/4]

void vtkContext2D::DrawPointSprites	(	vtkImageData *	sprite,
		vtkPoints2D *	points,
		vtkUnsignedCharArray *	colors
	)

Draw a series of point sprites, images centred at the points supplied.

The supplied vtkImageData is the sprite to be drawn, only squares will be drawn and the size is set using SetPointSize. Points will be colored by the colors array, which must be the same length as points.

◆ DrawPointSprites() [3/4]

void vtkContext2D::DrawPointSprites	(	vtkImageData *	sprite,
		float *	points,
		int	n,
		unsigned char *	colors,
		int	nc_comps
	)

Draw a series of point sprites, images centred at the points supplied.

The supplied vtkImageData is the sprite to be drawn, only squares will be drawn and the size is set using SetPointSize. Points will be colored by the colors array, which must be the same length as points.

◆ DrawPointSprites() [4/4]

void vtkContext2D::DrawPointSprites	(	vtkImageData *	sprite,
		float *	points,
		int	n
	)

Draw a series of point sprites, images centred at the points supplied.

The supplied vtkImageData is the sprite to be drawn, only squares will be drawn and the size is set using SetPointSize.

◆ DrawMarkers() [1/4]

virtual void vtkContext2D::DrawMarkers	(	int	shape,
		bool	highlight,
		float *	points,
		int	n,
		unsigned char *	colors,
		int	nc_comps
	)

virtual

Draw a series of markers centered at the points supplied.

The shape argument controls the marker shape, and can be one of

VTK_MARKER_CROSS
VTK_MARKER_PLUS
VTK_MARKER_SQUARE
VTK_MARKER_CIRCLE

VTK_MARKER_DIAMOND Marker size is determined by the current pen width.

Parameters

shape	the shape of the marker
highlight	whether to highlight the marker or not
points	where to draw the markers
n	number of points
colors	is an optional array of colors.
nc_comps	is the number of components for the color.

◆ DrawMarkers() [2/4]

virtual void vtkContext2D::DrawMarkers	(	int	shape,
		bool	highlight,
		float *	points,
		int	n
	)

virtual

Draw a series of markers centered at the points supplied.

The shape argument controls the marker shape, and can be one of

VTK_MARKER_CROSS
VTK_MARKER_PLUS
VTK_MARKER_SQUARE
VTK_MARKER_CIRCLE

VTK_MARKER_DIAMOND Marker size is determined by the current pen width.

Parameters

shape	the shape of the marker
highlight	whether to highlight the marker or not
points	where to draw the markers
n	number of points
colors	is an optional array of colors.
nc_comps	is the number of components for the color.

◆ DrawMarkers() [3/4]

virtual void vtkContext2D::DrawMarkers	(	int	shape,
		bool	highlight,
		vtkPoints2D *	points
	)

virtual

Draw a series of markers centered at the points supplied.

The shape argument controls the marker shape, and can be one of

VTK_MARKER_CROSS
VTK_MARKER_PLUS
VTK_MARKER_SQUARE
VTK_MARKER_CIRCLE

VTK_MARKER_DIAMOND Marker size is determined by the current pen width.

Parameters

shape	the shape of the marker
highlight	whether to highlight the marker or not
points	where to draw the markers
n	number of points
colors	is an optional array of colors.
nc_comps	is the number of components for the color.

◆ DrawMarkers() [4/4]

virtual void vtkContext2D::DrawMarkers	(	int	shape,
		bool	highlight,
		vtkPoints2D *	points,
		vtkUnsignedCharArray *	colors
	)

virtual

Draw a series of markers centered at the points supplied.

The shape argument controls the marker shape, and can be one of

VTK_MARKER_CROSS
VTK_MARKER_PLUS
VTK_MARKER_SQUARE
VTK_MARKER_CIRCLE

VTK_MARKER_DIAMOND Marker size is determined by the current pen width.

Parameters

shape	the shape of the marker
highlight	whether to highlight the marker or not
points	where to draw the markers
n	number of points
colors	is an optional array of colors.
nc_comps	is the number of components for the color.

◆ DrawRect()

void vtkContext2D::DrawRect	(	float	x,
		float	y,
		float	w,
		float	h
	)

Draw a rectangle with origin at x, y and width w, height h.

◆ DrawQuad() [1/2]

void vtkContext2D::DrawQuad	(	float	x1,
		float	y1,
		float	x2,
		float	y2,
		float	x3,
		float	y3,
		float	x4,
		float	y4
	)

Draw a quadrilateral at the specified points (4 points, 8 floats in x, y).

◆ DrawQuad() [2/2]

void vtkContext2D::DrawQuad ( float * p )

Draw a quadrilateral at the specified points (4 points, 8 floats in x, y).

◆ DrawQuadStrip() [1/2]

void vtkContext2D::DrawQuadStrip ( vtkPoints2D * points )

Draw a strip of quads.

◆ DrawQuadStrip() [2/2]

void vtkContext2D::DrawQuadStrip	(	float *	p,
		int	n
	)

Draw a strip of quads.

◆ DrawPolygon() [1/6]

void vtkContext2D::DrawPolygon	(	float *	x,
		float *	y,
		int	n
	)

Draw a polygon specified specified by the points using the x and y arrays supplied.

◆ DrawPolygon() [2/6]

void vtkContext2D::DrawPolygon ( vtkPoints2D * points )

Draw a polygon defined by the specified points - fastest code path due to memory layout of the coordinates.

◆ DrawPolygon() [3/6]

void vtkContext2D::DrawPolygon	(	float *	points,
		int	n
	)

Draw a polygon defined by the specified points, where the float array is of size 2*n and the points are packed x1, y1, x2, y2 etc.

Note: Fastest code path - points packed in x and y.

◆ DrawPolygon() [4/6]

void vtkContext2D::DrawPolygon	(	float *	x,
		float *	y,
		int	n,
		unsigned char *	color,
		int	nc_comps
	)

Draw a polygon specified specified by the points using the x and y arrays supplied.

◆ DrawPolygon() [5/6]

void vtkContext2D::DrawPolygon	(	vtkPoints2D *	points,
		unsigned char *	color,
		int	nc_comps
	)

Draw a polygon defined by the specified points - fastest code path due to memory layout of the coordinates.

◆ DrawPolygon() [6/6]

void vtkContext2D::DrawPolygon	(	float *	points,
		int	n,
		unsigned char *	color,
		int	nc_comps
	)

Draw a polygon defined by the specified points, where the float array is of size 2*n and the points are packed x1, y1, x2, y2 etc.

Note: Fastest code path - points packed in x and y.

◆ DrawEllipse()

void vtkContext2D::DrawEllipse	(	float	x,
		float	y,
		float	rx,
		float	ry
	)

Draw an ellipse with center at x, y and radii rx, ry.

Precondition: positive_rx: rx>=0; positive_ry: ry>=0

◆ DrawWedge()

void vtkContext2D::DrawWedge	(	float	x,
		float	y,
		float	outRadius,
		float	inRadius,
		float	startAngle,
		float	stopAngle
	)

Draw a circular wedge with center at x, y, outer radius outRadius, inner radius inRadius between angles startAngle and stopAngle (expressed in degrees).

Precondition: positive_outRadius: outRadius>=0; positive_inRadius: inRadius>=0; ordered_radii: inRadius<=outRadius

◆ DrawEllipseWedge()

void vtkContext2D::DrawEllipseWedge	(	float	x,
		float	y,
		float	outRx,
		float	outRy,
		float	inRx,
		float	inRy,
		float	startAngle,
		float	stopAngle
	)

Draw an elliptic wedge with center at x, y, outer radii outRx, outRy, inner radii inRx, inRy between angles startAngle and stopAngle (expressed in degrees).

Precondition: positive_outRx: outRx>=0; positive_outRy: outRy>=0; positive_inRx: inRx>=0; positive_inRy: inRy>=0; ordered_rx: inRx<=outRx; ordered_ry: inRy<=outRy

◆ DrawArc()

void vtkContext2D::DrawArc	(	float	x,
		float	y,
		float	r,
		float	startAngle,
		float	stopAngle
	)

Draw a circular arc with center at x,y with radius r between angles startAngle and stopAngle (expressed in degrees).

Precondition: positive_radius: r>=0

◆ DrawEllipticArc()

void vtkContext2D::DrawEllipticArc	(	float	x,
		float	y,
		float	rX,
		float	rY,
		float	startAngle,
		float	stopAngle
	)

Draw an elliptic arc with center at x,y with radii rX and rY between angles startAngle and stopAngle (expressed in degrees).

Precondition: positive_rX: rX>=0; positive_rY: rY>=0

◆ DrawImage() [1/3]

void vtkContext2D::DrawImage	(	float	x,
		float	y,
		vtkImageData *	image
	)

Draw the supplied image at the given x, y location (bottom corner).

◆ DrawImage() [2/3]

void vtkContext2D::DrawImage	(	float	x,
		float	y,
		float	scale,
		vtkImageData *	image
	)

Draw the supplied image at the given x, y location (bottom corner).

Scale the supplied image by scale.

◆ DrawImage() [3/3]

void vtkContext2D::DrawImage	(	const vtkRectf &	pos,
		vtkImageData *	image
	)

Draw the supplied image at the given position.

The origin, width, and height are specified by the supplied vtkRectf variable pos. The image will be drawn scaled to that size.

◆ DrawPolyData()

void vtkContext2D::DrawPolyData	(	float	x,
		float	y,
		vtkPolyData *	polyData,
		vtkUnsignedCharArray *	colors,
		int	scalarMode
	)

Draw the supplied polyData at the given x, y position (bottom corner).

Note: Supports only 2D meshes.

◆ DrawStringRect() [1/6]

void vtkContext2D::DrawStringRect	(	vtkPoints2D *	rect,
		const vtkStdString &	string
	)

Draw some text to the screen in a bounding rectangle with the alignment of the text properties respecting the rectangle.

The points should be supplied as bottom corner (x, y), width, height.

◆ DrawStringRect() [2/6]

void vtkContext2D::DrawStringRect	(	vtkPoints2D *	rect,
		const vtkUnicodeString &	string
	)

Draw some text to the screen in a bounding rectangle with the alignment of the text properties respecting the rectangle.

The points should be supplied as bottom corner (x, y), width, height.

◆ DrawStringRect() [3/6]

void vtkContext2D::DrawStringRect	(	vtkPoints2D *	rect,
		const char *	string
	)

Draw some text to the screen in a bounding rectangle with the alignment of the text properties respecting the rectangle.

The points should be supplied as bottom corner (x, y), width, height.

◆ DrawStringRect() [4/6]

void vtkContext2D::DrawStringRect	(	const float	rect[4],
		const vtkStdString &	string
	)

Draw some text to the screen in a bounding rectangle with the alignment of the text properties respecting the rectangle.

The points should be supplied as bottom corner (x, y), width, height.

◆ DrawStringRect() [5/6]

void vtkContext2D::DrawStringRect	(	const float	rect[4],
		const vtkUnicodeString &	string
	)

Draw some text to the screen in a bounding rectangle with the alignment of the text properties respecting the rectangle.

The points should be supplied as bottom corner (x, y), width, height.

◆ DrawStringRect() [6/6]

void vtkContext2D::DrawStringRect	(	const float	rect[4],
		const char *	string
	)

Draw some text to the screen in a bounding rectangle with the alignment of the text properties respecting the rectangle.

The points should be supplied as bottom corner (x, y), width, height.

◆ DrawString() [1/6]

void vtkContext2D::DrawString	(	vtkPoints2D *	point,
		const vtkStdString &	string
	)

Draw some text to the screen.

◆ DrawString() [2/6]

void vtkContext2D::DrawString	(	float	x,
		float	y,
		const vtkStdString &	string
	)

Draw some text to the screen.

◆ DrawString() [3/6]

void vtkContext2D::DrawString	(	vtkPoints2D *	point,
		const vtkUnicodeString &	string
	)

Draw some text to the screen.

◆ DrawString() [4/6]

void vtkContext2D::DrawString	(	float	x,
		float	y,
		const vtkUnicodeString &	string
	)

Draw some text to the screen.

◆ DrawString() [5/6]

void vtkContext2D::DrawString	(	vtkPoints2D *	point,
		const char *	string
	)

Draw some text to the screen.

◆ DrawString() [6/6]

void vtkContext2D::DrawString	(	float	x,
		float	y,
		const char *	string
	)

Draw some text to the screen.

◆ ComputeStringBounds() [1/6]

void vtkContext2D::ComputeStringBounds	(	const vtkStdString &	string,
		vtkPoints2D *	bounds
	)

Compute the bounds of the supplied string.

The bounds will be copied to the supplied bounds variable, the first two elements are the bottom corner of the string, and the second two elements are the width and height of the bounding box.

NOTE:the text justification from the current text property is NOT considered when computing these bounds.

◆ ComputeStringBounds() [2/6]

void vtkContext2D::ComputeStringBounds	(	const vtkStdString &	string,
		float	bounds[4]
	)

Compute the bounds of the supplied string.

The bounds will be copied to the supplied bounds variable, the first two elements are the bottom corner of the string, and the second two elements are the width and height of the bounding box.

NOTE:the text justification from the current text property is NOT considered when computing these bounds.

◆ ComputeStringBounds() [3/6]

void vtkContext2D::ComputeStringBounds	(	const vtkUnicodeString &	string,
		vtkPoints2D *	bounds
	)

Compute the bounds of the supplied string.

The bounds will be copied to the supplied bounds variable, the first two elements are the bottom corner of the string, and the second two elements are the width and height of the bounding box.

NOTE:the text justification from the current text property is NOT considered when computing these bounds.

◆ ComputeStringBounds() [4/6]

void vtkContext2D::ComputeStringBounds	(	const vtkUnicodeString &	string,
		float	bounds[4]
	)

Compute the bounds of the supplied string.

The bounds will be copied to the supplied bounds variable, the first two elements are the bottom corner of the string, and the second two elements are the width and height of the bounding box.

NOTE:the text justification from the current text property is NOT considered when computing these bounds.

◆ ComputeStringBounds() [5/6]

void vtkContext2D::ComputeStringBounds	(	const char *	string,
		vtkPoints2D *	bounds
	)

Compute the bounds of the supplied string.

The bounds will be copied to the supplied bounds variable, the first two elements are the bottom corner of the string, and the second two elements are the width and height of the bounding box.

NOTE:the text justification from the current text property is NOT considered when computing these bounds.

◆ ComputeStringBounds() [6/6]

void vtkContext2D::ComputeStringBounds	(	const char *	string,
		float	bounds[4]
	)

Compute the bounds of the supplied string.

The bounds will be copied to the supplied bounds variable, the first two elements are the bottom corner of the string, and the second two elements are the width and height of the bounding box.

NOTE:the text justification from the current text property is NOT considered when computing these bounds.

◆ ComputeJustifiedStringBounds()

void vtkContext2D::ComputeJustifiedStringBounds	(	const char *	string,
		float	bounds[4]
	)

Compute the bounds of the supplied string while taking into account the justification and rotation of the currently applied text property.

◆ ComputeFontSizeForBoundedString()

int vtkContext2D::ComputeFontSizeForBoundedString	(	const vtkStdString &	string,
		float	width,
		float	height
	)

Calculate the largest possible font size where the supplied string will fit within the specified bounds.

In addition to being returned, this font size is also used to update the vtkTextProperty used by this object. NOTE: text rotation is ignored for the purposes of this function.