1 /*
2 * Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
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 * Permission is granted to anyone to use this software for any purpose,
8 * including commercial applications, and to alter it and redistribute it
9 * freely, subject to the following restrictions:
10 * 1. The origin of this software must not be misrepresented; you must not
11 * claim that you wrote the original software. If you use this software
12 * in a product, an acknowledgment in the product documentation would be
13 * appreciated but is not required.
14 * 2. Altered source versions must be plainly marked as such, and must not be
15 * misrepresented as being the original software.
16 * 3. This notice may not be removed or altered from any source distribution.
17 */
18 
19 #ifndef BULLET_TEST_H
20 #define BULLET_TEST_H
21 
22 class BulletTest : public Test
23 {
24 public:
25 
BulletTest()26     BulletTest()
27     {
28         {
29             b2BodyDef bd;
30             bd.position.Set(0.0f, 0.0f);
31             b2Body* body = m_world->CreateBody(&bd);
32 
33             b2EdgeShape edge;
34 
35             edge.Set(b2Vec2(-10.0f, 0.0f), b2Vec2(10.0f, 0.0f));
36             body->CreateFixture(&edge, 0.0f);
37 
38             b2PolygonShape shape;
39             shape.SetAsBox(0.2f, 1.0f, b2Vec2(0.5f, 1.0f), 0.0f);
40             body->CreateFixture(&shape, 0.0f);
41         }
42 
43         {
44             b2BodyDef bd;
45             bd.type = b2_dynamicBody;
46             bd.position.Set(0.0f, 4.0f);
47 
48             b2PolygonShape box;
49             box.SetAsBox(2.0f, 0.1f);
50 
51             m_body = m_world->CreateBody(&bd);
52             m_body->CreateFixture(&box, 1.0f);
53 
54             box.SetAsBox(0.25f, 0.25f);
55 
56             //m_x = RandomFloat(-1.0f, 1.0f);
57             m_x = 0.20352793f;
58             bd.position.Set(m_x, 10.0f);
59             bd.bullet = true;
60 
61             m_bullet = m_world->CreateBody(&bd);
62             m_bullet->CreateFixture(&box, 100.0f);
63 
64             m_bullet->SetLinearVelocity(b2Vec2(0.0f, -50.0f));
65         }
66     }
67 
Launch()68     void Launch()
69     {
70         m_body->SetTransform(b2Vec2(0.0f, 4.0f), 0.0f);
71         m_body->SetLinearVelocity(b2Vec2_zero);
72         m_body->SetAngularVelocity(0.0f);
73 
74         m_x = RandomFloat(-1.0f, 1.0f);
75         m_bullet->SetTransform(b2Vec2(m_x, 10.0f), 0.0f);
76         m_bullet->SetLinearVelocity(b2Vec2(0.0f, -50.0f));
77         m_bullet->SetAngularVelocity(0.0f);
78 
79         extern int32 b2_gjkCalls, b2_gjkIters, b2_gjkMaxIters;
80         extern int32 b2_toiCalls, b2_toiIters, b2_toiMaxIters;
81         extern int32 b2_toiRootIters, b2_toiMaxRootIters;
82 
83         b2_gjkCalls = 0;
84         b2_gjkIters = 0;
85         b2_gjkMaxIters = 0;
86 
87         b2_toiCalls = 0;
88         b2_toiIters = 0;
89         b2_toiMaxIters = 0;
90         b2_toiRootIters = 0;
91         b2_toiMaxRootIters = 0;
92     }
93 
Step(Settings * settings)94     void Step(Settings* settings)
95     {
96         Test::Step(settings);
97 
98         extern int32 b2_gjkCalls, b2_gjkIters, b2_gjkMaxIters;
99         extern int32 b2_toiCalls, b2_toiIters;
100         extern int32 b2_toiRootIters, b2_toiMaxRootIters;
101 
102         if (b2_gjkCalls > 0)
103         {
104             m_debugDraw.DrawString(5, m_textLine, "gjk calls = %d, ave gjk iters = %3.1f, max gjk iters = %d",
105                 b2_gjkCalls, b2_gjkIters / float32(b2_gjkCalls), b2_gjkMaxIters);
106             m_textLine += 15;
107         }
108 
109         if (b2_toiCalls > 0)
110         {
111             m_debugDraw.DrawString(5, m_textLine, "toi calls = %d, ave toi iters = %3.1f, max toi iters = %d",
112                 b2_toiCalls, b2_toiIters / float32(b2_toiCalls), b2_toiMaxRootIters);
113             m_textLine += 15;
114 
115             m_debugDraw.DrawString(5, m_textLine, "ave toi root iters = %3.1f, max toi root iters = %d",
116                 b2_toiRootIters / float32(b2_toiCalls), b2_toiMaxRootIters);
117             m_textLine += 15;
118         }
119 
120         if (m_stepCount % 60 == 0)
121         {
122             Launch();
123         }
124     }
125 
Create()126     static Test* Create()
127     {
128         return new BulletTest;
129     }
130 
131     b2Body* m_body;
132     b2Body* m_bullet;
133     float32 m_x;
134 };
135 
136 #endif
137