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985c397 | 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 | // SPDX-License-Identifier: BSD-3-Clause
// Box2D.h
/*==============================
Copyright (c) 2011-2015 Dan Heeks
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. The name of the author may not be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
==============================*/
#pragma once
#include <string.h> // for memcpy() prototype
#include <cmath> // for sqrt() prototype
class CBox2D
{
public:
Point m_minxy;
Point m_maxxy;
bool m_valid;
CBox2D()
: m_valid(false)
{}
CBox2D(const Point& minxy, const Point& maxxy)
: m_minxy(minxy)
, m_maxxy(maxxy)
, m_valid(true)
{}
bool operator==(const CBox2D& rhs) const
{
if (m_minxy != rhs.m_minxy) {
return false;
}
if (m_maxxy != rhs.m_maxxy) {
return false;
}
if (m_valid != rhs.m_valid) {
return (false);
}
return (true);
}
bool operator!=(const CBox2D& rhs) const
{
return (!(*this == rhs));
}
void Insert(const Point& p)
{ // insert a point
if (m_valid) {
if (p.x < m_minxy.x) {
m_minxy.x = p.x;
}
if (p.y < m_minxy.y) {
m_minxy.y = p.y;
}
if (p.x > m_maxxy.x) {
m_maxxy.x = p.x;
}
if (p.y > m_maxxy.y) {
m_maxxy.y = p.y;
}
}
else {
m_valid = true;
m_minxy = p;
m_maxxy = p;
}
}
void Insert(const CBox2D& b)
{
if (b.m_valid) {
if (m_valid) {
if (b.m_minxy.x < m_minxy.x) {
m_minxy.x = b.m_minxy.x;
}
if (b.m_minxy.y < m_minxy.y) {
m_minxy.y = b.m_minxy.y;
}
if (b.m_maxxy.x > m_maxxy.x) {
m_maxxy.x = b.m_maxxy.x;
}
if (b.m_maxxy.y > m_maxxy.y) {
m_maxxy.y = b.m_maxxy.y;
}
}
else {
m_valid = b.m_valid;
m_minxy = b.m_minxy;
m_maxxy = b.m_maxxy;
}
}
}
Point Centre() const
{
return (m_minxy + m_maxxy) * 0.5;
}
double Width() const
{
if (m_valid) {
return m_maxxy.x - m_minxy.x;
}
else {
return 0.0;
}
}
double Height() const
{
if (m_valid) {
return m_maxxy.y - m_minxy.y;
}
else {
return 0.0;
}
}
double Radius() const
{
return sqrt(Width() * Width() + Height() * Height()) / 2;
}
double MinX() const
{
return (m_minxy.x);
}
double MaxX() const
{
return (m_maxxy.x);
}
double MinY() const
{
return (m_minxy.y);
}
double MaxY() const
{
return (m_maxxy.y);
}
};
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