Method initPhysics

tests/cpp-tests/Source/Box2DTest/Box2dTest.cpp:119–245

}

void Box2DTest::initPhysics()
{
    b2Vec2 gravity;
    gravity.Set(0.0f, -10.0f);
    world = new b2World(gravity);

    // Do we want to let bodies sleep?
    world->SetAllowSleeping(true);

    world->SetContinuousPhysics(true);

    // Define the ground body.
    b2BodyDef groundBodyDef;
    groundBodyDef.position.Set(0, 0);  // bottom-left corner

    // Call the body factory which allocates memory for the ground body
    // from a pool and creates the ground box shape (also from a pool).
    // The body is also added to the world.
    b2Body* groundBody = world->CreateBody(&groundBodyDef);

    // Define the ground box shape.
    b2EdgeShape groundBox;

    // bottom
    groundBox.SetTwoSided(b2Vec2(VisibleRect::leftBottom().x / PTM_RATIO, VisibleRect::leftBottom().y / PTM_RATIO),
                          b2Vec2(VisibleRect::rightBottom().x / PTM_RATIO, VisibleRect::rightBottom().y / PTM_RATIO));
    groundBody->CreateFixture(&groundBox, 0);

    // top
    groundBox.SetTwoSided(b2Vec2(VisibleRect::leftTop().x / PTM_RATIO, VisibleRect::leftTop().y / PTM_RATIO),
                          b2Vec2(VisibleRect::rightTop().x / PTM_RATIO, VisibleRect::rightTop().y / PTM_RATIO));
    groundBody->CreateFixture(&groundBox, 0);

    // left
    groundBox.SetTwoSided(b2Vec2(VisibleRect::leftTop().x / PTM_RATIO, VisibleRect::leftTop().y / PTM_RATIO),
                          b2Vec2(VisibleRect::leftBottom().x / PTM_RATIO, VisibleRect::leftBottom().y / PTM_RATIO));
    groundBody->CreateFixture(&groundBox, 0);

    // right
    groundBox.SetTwoSided(b2Vec2(VisibleRect::rightBottom().x / PTM_RATIO, VisibleRect::rightBottom().y / PTM_RATIO),
                          b2Vec2(VisibleRect::rightTop().x / PTM_RATIO, VisibleRect::rightTop().y / PTM_RATIO));
    groundBody->CreateFixture(&groundBox, 0);

    // Small triangle
    b2Vec2 vertices[3];
    vertices[0].Set(-1.0f, 0.0f);
    vertices[1].Set(1.0f, 0.0f);
    vertices[2].Set(0.0f, 2.0f);

    b2PolygonShape polygon;
    polygon.Set(vertices, 3);

    b2FixtureDef triangleShapeDef;
    triangleShapeDef.shape   = &polygon;
    triangleShapeDef.density = 1.0f;

    b2BodyDef triangleBodyDef;
    triangleBodyDef.type = b2_dynamicBody;