impeller::PointFieldGeometry Class Reference

#include <point_field_geometry.h>

Inheritance diagram for impeller::PointFieldGeometry:

Public Member Functions
	PointFieldGeometry (std::vector< Point > points, Scalar radius, bool round)
	~PointFieldGeometry ()
Public Member Functions inherited from impeller::Geometry
	Geometry ()
virtual	~Geometry ()
virtual bool	CoversArea (const Matrix &transform, const Rect &rect) const
	Determines if this geometry, transformed by the given transform, will completely cover all surface area of the given rect. More...

Static Public Member Functions
static size_t	ComputeCircleDivisions (Scalar scaled_radius, bool round)
	Compute the number of vertices to divide each circle into. More...
Static Public Member Functions inherited from impeller::Geometry
static std::unique_ptr< Geometry >	MakeFillPath (const Path &path, std::optional< Rect > inner_rect=std::nullopt)
static std::unique_ptr< Geometry >	MakeStrokePath (const Path &path, Scalar stroke_width=0.0, Scalar miter_limit=4.0, Cap stroke_cap=Cap::kButt, Join stroke_join=Join::kMiter)
static std::unique_ptr< Geometry >	MakeCover ()
static std::unique_ptr< Geometry >	MakeRect (Rect rect)
static std::unique_ptr< Geometry >	MakePointField (std::vector< Point > points, Scalar radius, bool round)

Detailed Description

Definition at line 11 of file point_field_geometry.h.

Constructor & Destructor Documentation

PointFieldGeometry()

impeller::PointFieldGeometry::PointFieldGeometry	(	std::vector< Point >	points,
		Scalar	radius,
		bool	round
	)

Definition at line 12 of file point_field_geometry.cc.

    : points_(std::move(points)), radius_(radius), round_(round) {}

~PointFieldGeometry()

impeller::PointFieldGeometry::~PointFieldGeometry ( )

default

Member Function Documentation

ComputeCircleDivisions()

size_t impeller::PointFieldGeometry::ComputeCircleDivisions ( Scalar  scaled_radius, bool  round  )

static

Compute the number of vertices to divide each circle into.

Returns

the number of vertices.

Definition at line 244 of file point_field_geometry.cc.

                                                              {
  if (!round) {
    return 4;
  }
 
  // Note: these values are approximated based on the values returned from
  // the decomposition of 4 cubics performed by Path::CreatePolyline.
  if (scaled_radius < 1.0) {
    return 4;
  }
  if (scaled_radius < 2.0) {
    return 8;
  }
  if (scaled_radius < 12.0) {
    return 24;
  }
  if (scaled_radius < 22.0) {
    return 34;
  }
  return std::min(scaled_radius, 140.0f);
}

Referenced by impeller::testing::TEST_P().

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

• impeller/entity/geometry/point_field_geometry.h
• impeller/entity/geometry/point_field_geometry.cc