JUCE/examples/Demo/Source/Demos/Box2DTests/BulletTest.h

/*
* Copyright (c) 2006-2009 Erin Catto http://www.box2d.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.
*/

#ifndef BULLET_TEST_H
#define BULLET_TEST_H

class BulletTest : public Test
{
public:

    BulletTest()
    {
        {
            b2BodyDef bd;
            bd.position.Set(0.0f, 0.0f);
            b2Body* body = m_world->CreateBody(&bd);

            b2EdgeShape edge;

            edge.Set(b2Vec2(-10.0f, 0.0f), b2Vec2(10.0f, 0.0f));
            body->CreateFixture(&edge, 0.0f);

            b2PolygonShape shape;
            shape.SetAsBox(0.2f, 1.0f, b2Vec2(0.5f, 1.0f), 0.0f);
            body->CreateFixture(&shape, 0.0f);
        }

        {
            b2BodyDef bd;
            bd.type = b2_dynamicBody;
            bd.position.Set(0.0f, 4.0f);

            b2PolygonShape box;
            box.SetAsBox(2.0f, 0.1f);

            m_body = m_world->CreateBody(&bd);
            m_body->CreateFixture(&box, 1.0f);

            box.SetAsBox(0.25f, 0.25f);

            //m_x = RandomFloat(-1.0f, 1.0f);
            m_x = 0.20352793f;
            bd.position.Set(m_x, 10.0f);
            bd.bullet = true;

            m_bullet = m_world->CreateBody(&bd);
            m_bullet->CreateFixture(&box, 100.0f);

            m_bullet->SetLinearVelocity(b2Vec2(0.0f, -50.0f));
        }
    }

    void Launch()
    {
        m_body->SetTransform(b2Vec2(0.0f, 4.0f), 0.0f);
        m_body->SetLinearVelocity(b2Vec2_zero);
        m_body->SetAngularVelocity(0.0f);

        m_x = RandomFloat(-1.0f, 1.0f);
        m_bullet->SetTransform(b2Vec2(m_x, 10.0f), 0.0f);
        m_bullet->SetLinearVelocity(b2Vec2(0.0f, -50.0f));
        m_bullet->SetAngularVelocity(0.0f);

        extern int32 b2_gjkCalls, b2_gjkIters, b2_gjkMaxIters;
        extern int32 b2_toiCalls, b2_toiIters, b2_toiMaxIters;
        extern int32 b2_toiRootIters, b2_toiMaxRootIters;

        b2_gjkCalls = 0;
        b2_gjkIters = 0;
        b2_gjkMaxIters = 0;

        b2_toiCalls = 0;
        b2_toiIters = 0;
        b2_toiMaxIters = 0;
        b2_toiRootIters = 0;
        b2_toiMaxRootIters = 0;
    }

    void Step(Settings* settings)
    {
        Test::Step(settings);

        extern int32 b2_gjkCalls, b2_gjkIters, b2_gjkMaxIters;
        extern int32 b2_toiCalls, b2_toiIters;
        extern int32 b2_toiRootIters, b2_toiMaxRootIters;

        if (b2_gjkCalls > 0)
        {
            m_debugDraw.DrawString(5, m_textLine, "gjk calls = %d, ave gjk iters = %3.1f, max gjk iters = %d",
                b2_gjkCalls, b2_gjkIters / float32(b2_gjkCalls), b2_gjkMaxIters);
            m_textLine += 15;
        }

        if (b2_toiCalls > 0)
        {
            m_debugDraw.DrawString(5, m_textLine, "toi calls = %d, ave toi iters = %3.1f, max toi iters = %d",
                b2_toiCalls, b2_toiIters / float32(b2_toiCalls), b2_toiMaxRootIters);
            m_textLine += 15;

            m_debugDraw.DrawString(5, m_textLine, "ave toi root iters = %3.1f, max toi root iters = %d",
                b2_toiRootIters / float32(b2_toiCalls), b2_toiMaxRootIters);
            m_textLine += 15;
        }

        if (m_stepCount % 60 == 0)
        {
            Launch();
        }
    }

    static Test* Create()
    {
        return new BulletTest;
    }

    b2Body* m_body;
    b2Body* m_bullet;
    float32 m_x;
};

#endif