1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2025 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
#pragma once
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Graphics/Export.hpp>
#include <SFML/Graphics/Shape.hpp>
#include <SFML/System/Vector2.hpp>
#include <cstddef>
namespace sf
{
////////////////////////////////////////////////////////////
/// \brief Specialized shape representing a circle
///
////////////////////////////////////////////////////////////
class SFML_GRAPHICS_API CircleShape : public Shape
{
public:
////////////////////////////////////////////////////////////
/// \brief Default constructor
///
/// \param radius Radius of the circle
/// \param pointCount Number of points composing the circle
///
////////////////////////////////////////////////////////////
explicit CircleShape(float radius = 0, std::size_t pointCount = 30);
////////////////////////////////////////////////////////////
/// \brief Set the radius of the circle
///
/// \param radius New radius of the circle
///
/// \see `getRadius`
///
////////////////////////////////////////////////////////////
void setRadius(float radius);
////////////////////////////////////////////////////////////
/// \brief Get the radius of the circle
///
/// \return Radius of the circle
///
/// \see `setRadius`
///
////////////////////////////////////////////////////////////
[[nodiscard]] float getRadius() const;
////////////////////////////////////////////////////////////
/// \brief Set the number of points of the circle
///
/// \param count New number of points of the circle
///
/// \see `getPointCount`
///
////////////////////////////////////////////////////////////
void setPointCount(std::size_t count);
////////////////////////////////////////////////////////////
/// \brief Get the number of points of the circle
///
/// \return Number of points of the circle
///
/// \see `setPointCount`
///
////////////////////////////////////////////////////////////
[[nodiscard]] std::size_t getPointCount() const override;
////////////////////////////////////////////////////////////
/// \brief Get a point of the circle
///
/// The returned point is in local coordinates, that is,
/// the shape's transforms (position, rotation, scale) are
/// not taken into account.
/// The result is undefined if `index` is out of the valid range.
///
/// \param index Index of the point to get, in range [0 .. getPointCount() - 1]
///
/// \return `index`-th point of the shape
///
////////////////////////////////////////////////////////////
[[nodiscard]] Vector2f getPoint(std::size_t index) const override;
////////////////////////////////////////////////////////////
/// \brief Get the geometric center of the circle
///
/// The returned point is in local coordinates, that is,
/// the shape's transforms (position, rotation, scale) are
/// not taken into account.
///
/// \return The geometric center of the shape
///
////////////////////////////////////////////////////////////
[[nodiscard]] Vector2f getGeometricCenter() const override;
private:
////////////////////////////////////////////////////////////
// Member data
////////////////////////////////////////////////////////////
float m_radius; //!< Radius of the circle
std::size_t m_pointCount; //!< Number of points composing the circle
};
} // namespace sf
////////////////////////////////////////////////////////////
/// \class sf::CircleShape
/// \ingroup graphics
///
/// This class inherits all the functions of `sf::Transformable`
/// (position, rotation, scale, bounds, ...) as well as the
/// functions of `sf::Shape` (outline, color, texture, ...).
///
/// Usage example:
/// \code
/// sf::CircleShape circle;
/// circle.setRadius(150);
/// circle.setOutlineColor(sf::Color::Red);
/// circle.setOutlineThickness(5);
/// circle.setPosition({10, 20});
/// ...
/// window.draw(circle);
/// \endcode
///
/// Since the graphics card can't draw perfect circles, we have to
/// fake them with multiple triangles connected to each other. The
/// "points count" property of `sf::CircleShape` defines how many of these
/// triangles to use, and therefore defines the quality of the circle.
///
/// The number of points can also be used for another purpose; with
/// small numbers you can create any regular polygon shape:
/// equilateral triangle, square, pentagon, hexagon, ...
///
/// \see `sf::Shape`, `sf::RectangleShape`, `sf::ConvexShape`
///
////////////////////////////////////////////////////////////
|
