line_math.h Source File - ClanLib SDK
Description: line_math.h Source File

line_math.h
1/*
2** ClanLib SDK
3** Copyright (c) 1997-2020 The ClanLib Team
4**
5** This software is provided 'as-is', without any express or implied
6** warranty. In no event will the authors be held liable for any damages
7** arising from the use of this software.
8**
9** Permission is granted to anyone to use this software for any purpose,
10** including commercial applications, and to alter it and redistribute it
11** freely, subject to the following restrictions:
12**
13** 1. The origin of this software must not be misrepresented; you must not
14** claim that you wrote the original software. If you use this software
15** in a product, an acknowledgment in the product documentation would be
16** appreciated but is not required.
17** 2. Altered source versions must be plainly marked as such, and must not be
18** misrepresented as being the original software.
19** 3. This notice may not be removed or altered from any source distribution.
20**
21** Note: Some of the libraries ClanLib may link to may have additional
22** requirements or restrictions.
23**
24** File Author(s):
25**
26** Harry Storbacka
27** Magnus Norddahl
28*/
29
30#pragma once
31
32#include "point.h"
33
34namespace clan
35{
38
42 class LineMath
43 {
44 public:
52 static float point_right_of_line(float x, float y, float *line);
53
64 static float point_right_of_line(float x, float y, float line_x1, float line_y1, float line_x2, float line_y2);
65
73 static float point_right_of_line(const Pointf &A, const Pointf &B, const Pointf &P);
74
82 static Pointf midpoint(const Pointf &A, const Pointf &B);
83
89 static Pointf closest_point(const Pointf &P, const Pointf &A, const Pointf &B);
90
96 static float closest_point_relative(const Pointf &P, const Pointf &A, const Pointf &B);
97 };
98
100}
clan::LineMath
Math operations on 2D lines.
Definition line_math.h:43
clan::LineMath::closest_point_relative
static float closest_point_relative(const Pointf &P, const Pointf &A, const Pointf &B)
Return the relative position (0-1) of the point R on the line from A to B closest to point P.
clan::LineMath::midpoint
static Pointf midpoint(const Pointf &A, const Pointf &B)
Return the midpoint of the line from point A to point B.
clan::LineMath::closest_point
static Pointf closest_point(const Pointf &P, const Pointf &A, const Pointf &B)
Return the Point on the line from A to B closest to point P.
clan::LineMath::point_right_of_line
static float point_right_of_line(float x, float y, float *line)
Return [<0, 0, >0] if the Point P is right, on or left of the line trough A,B.
clan::LineMath::point_right_of_line
static float point_right_of_line(float x, float y, float line_x1, float line_y1, float line_x2, float line_y2)
Point right of line.
clan::LineMath::point_right_of_line
static float point_right_of_line(const Pointf &A, const Pointf &B, const Pointf &P)
Point right of line.
clan::Pointf
2D (x,y) point structure - Float
Definition point.h:72
clan::FillMode::line
@ line
clan
Definition clanapp.h:36
clan::Key::y
@ y
clan::Key::x
@ x