1/**
2 * Copyright (c) 2006-2023 LOVE Development Team
3 *
4 * This software is provided 'as-is', without any express or implied
5 * warranty. In no event will the authors be held liable for any damages
6 * arising from the use of this software.
7 *
8 * Permission is granted to anyone to use this software for any purpose,
9 * including commercial applications, and to alter it and redistribute it
10 * freely, subject to the following restrictions:
11 *
12 * 1. The origin of this software must not be misrepresented; you must not
13 * claim that you wrote the original software. If you use this software
14 * in a product, an acknowledgment in the product documentation would be
15 * appreciated but is not required.
16 * 2. Altered source versions must be plainly marked as such, and must not be
17 * misrepresented as being the original software.
18 * 3. This notice may not be removed or altered from any source distribution.
19 **/
20
21#include "ChainShape.h"
22
23// Module
24#include "Body.h"
25#include "World.h"
26#include "Physics.h"
27
28namespace love
29{
30namespace physics
31{
32namespace box2d
33{
34
35love::Type ChainShape::type("ChainShape", &Shape::type);
36
37ChainShape::ChainShape(b2ChainShape *c, bool own)
38 : Shape(c, own)
39{
40}
41
42ChainShape::~ChainShape()
43{
44}
45
46void ChainShape::setNextVertex(float x, float y)
47{
48 b2Vec2 v(x, y);
49 b2ChainShape *c = (b2ChainShape *)shape;
50 c->SetNextVertex(Physics::scaleDown(v));
51}
52
53void ChainShape::setNextVertex()
54{
55 b2ChainShape *c = (b2ChainShape *)shape;
56 c->m_hasNextVertex = false;
57}
58
59void ChainShape::setPreviousVertex(float x, float y)
60{
61 b2Vec2 v(x, y);
62 b2ChainShape *c = (b2ChainShape *)shape;
63 c->SetPrevVertex(Physics::scaleDown(v));
64}
65
66void ChainShape::setPreviousVertex()
67{
68 b2ChainShape *c = (b2ChainShape *)shape;
69 c->m_hasPrevVertex = false;
70}
71
72bool ChainShape::getNextVertex(float &x, float &y) const
73{
74 b2ChainShape *c = (b2ChainShape *)shape;
75
76 if (c->m_hasNextVertex)
77 {
78 b2Vec2 v = Physics::scaleUp(c->m_nextVertex);
79 x = v.x;
80 y = v.y;
81 return true;
82 }
83
84 return false;
85}
86
87bool ChainShape::getPreviousVertex(float &x, float &y) const
88{
89 b2ChainShape *c = (b2ChainShape *)shape;
90
91 if (c->m_hasPrevVertex)
92 {
93 b2Vec2 v = Physics::scaleUp(c->m_prevVertex);
94 x = v.x;
95 y = v.y;
96 return true;
97 }
98
99 return false;
100}
101
102EdgeShape *ChainShape::getChildEdge(int index) const
103{
104 b2ChainShape *c = (b2ChainShape *)shape;
105 b2EdgeShape *e = new b2EdgeShape;
106
107 try
108 {
109 c->GetChildEdge(e, index);
110 }
111 catch (love::Exception &)
112 {
113 delete e;
114 throw;
115 }
116
117 return new EdgeShape(e, true);
118}
119
120int ChainShape::getVertexCount() const
121{
122 b2ChainShape *c = (b2ChainShape *)shape;
123 return c->m_count;
124}
125
126b2Vec2 ChainShape::getPoint(int index) const
127{
128 b2ChainShape *c = (b2ChainShape *)shape;
129 if (index < 0 || index >= c->m_count)
130 throw love::Exception("Physics error: index out of bounds");
131 const b2Vec2 &v = c->m_vertices[index];
132 return Physics::scaleUp(v);
133}
134
135const b2Vec2 *ChainShape::getPoints() const
136{
137 b2ChainShape *c = (b2ChainShape *)shape;
138 return c->m_vertices;
139}
140
141} // box2d
142} // physics
143} // love
144