fastuidraw::PathContour::arc Class Reference

An arc is for connecting one point to the next via an arc of a circle. More...

#include <path.hpp>

Inheritance diagram for fastuidraw::PathContour::arc:

Public Member Functions
	arc (PathContour &contour, float angle, const vec2 &end, enum PathEnums::edge_type_t tp)
virtual enum return_code	add_to_builder (ShaderFilledPath::Builder *builder, float tol) const
range_type< float >	angle (void) const
virtual void	approximate_bounding_box (Rect *out_bb) const
vec2	center (void) const
virtual reference_counted_ptr< interpolator_base >	deep_copy (PathContour &contour) const
virtual bool	is_flat (void) const
virtual reference_counted_ptr< tessellation_state >	produce_tessellation (const TessellatedPath::TessellationParams &tess_params, TessellatedPath::SegmentStorage *out_data, float *out_max_distance) const
Public Member Functions inherited from fastuidraw::PathContour::interpolator_base
	interpolator_base (PathContour &contour, const vec2 &end, enum PathEnums::edge_type_t tp)
enum PathEnums::edge_type_t	edge_type (void) const
const vec2 &	end_pt (void) const
const vec2 &	start_pt (void) const
Public Member Functions inherited from fastuidraw::reference_counted_base< T, Counter >
	reference_counted_base (void)

Additional Inherited Members
Static Public Member Functions inherited from fastuidraw::reference_counted_base< T, Counter >
static void	add_reference (const reference_counted_base< T, Counter > *p)
static void	remove_reference (const reference_counted_base< T, Counter > *p)

Detailed Description

An arc is for connecting one point to the next via an arc of a circle.

Definition at line 433 of file path.hpp.

Constructor & Destructor Documentation

arc()

fastuidraw::PathContour::arc::arc	(	PathContour &	contour,
		float	angle,
		const vec2 &	end,
		enum PathEnums::edge_type_t	tp
	)

Ctor.

Parameters

contour	PathContour to which to add the interpolator. The interpolator is added to the contour at the interpolator's construction. The start point is computed from the current state of the PathContour
angle	The angle of the arc in radians, the value must not be a multiple of 2*FASTUIDRAW_PI. Assuming a coordinate system where y-increases vertically and x-increases to the right, a positive value indicates to have the arc go counter-clockwise, a negative angle for the arc to go clockwise.
end	end of curve
tp	nature the edge represented by this interpolator_base

Member Function Documentation

add_to_builder()

virtual enum return_code fastuidraw::PathContour::arc::add_to_builder ( ShaderFilledPath::Builder *  builder, float  tol  ) const

virtual

To be optionally implemented by a derived class to add this interpolator to a ShaderFilledPath::Builder. A return code of routine_fail means that the interpolator cannot be realized in such a way to be added and a Path that includes such an interpolator in a closed contour will be unable to realized a ShaderFilledPath value and Path::shader_filled_path() will return a null handle. Default implementation is to return routine_fail.

Parameters

builder	object to which to add interpolator.
tol	error goal between the interpolator and how it is realized on the ShaderFilledPath::Builder

Reimplemented from fastuidraw::PathContour::interpolator_base.

angle()

range_type<float> fastuidraw::PathContour::arc::angle

(

void

)

const

Returns the starting and ending angle of the arc each in radians.

approximate_bounding_box()

virtual void fastuidraw::PathContour::arc::approximate_bounding_box ( Rect *  out_bb ) const

virtual

To be implemented by a derived class to return a fast (and approximate) bounding box for the interpolator.

Parameters

out_bb

(output) location to which to write the bounding box value

Implements fastuidraw::PathContour::interpolator_base.

center()

vec2 fastuidraw::PathContour::arc::center

(

void

)

const

Returns the center of the arc.

deep_copy()

virtual reference_counted_ptr<interpolator_base> fastuidraw::PathContour::arc::deep_copy ( PathContour &  contour ) const

virtual

To be implemented by a derived class to create and return a deep copy of the interpolator object.

Implements fastuidraw::PathContour::interpolator_base.

is_flat()

virtual bool fastuidraw::PathContour::arc::is_flat ( void  ) const

virtual

To be implemented by a derived class to return true if the interpolator is flat, i.e. is just a line segment connecting start_pt() to end_pt().

Implements fastuidraw::PathContour::interpolator_base.

produce_tessellation()

virtual reference_counted_ptr<tessellation_state> fastuidraw::PathContour::arc::produce_tessellation ( const TessellatedPath::TessellationParams &  tess_params, TessellatedPath::SegmentStorage *  out_data, float *  out_max_distance  ) const

virtual

To be implemented by a derived class to produce the arc-tessellation from start_pt() to end_pt(). In addition, for recursive tessellation, returns the tessellation state to be queried for recursion depth and reused to refine the tessellation. If the tessellation routine is not recursive in nature, return nullptr.

Parameters

tess_params	tessellation parameters
out_data	location to which to write the tessellations
out_max_distance	location to which to write an upperbound for the distance between the curve and the tesseallation approximation.

Implements fastuidraw::PathContour::interpolator_base.

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

• /home/kevin/fastuidraw.krogueintel/inc/fastuidraw/path.hpp