C++ (Cpp) Bot::_init示例

Simulator::Simulator(QGraphicsScene *scene, QObject *parent): QObject(parent), timerId(0), scene(scene){
			// Define the gravity vector.
			b2Vec2 gravity(0.0f,-10.0f);
			world = new b2World(gravity, true);

			b2BodyDef bodyDef;
			b2PolygonShape shapeDef;
			b2FixtureDef fixtureDef;

			bodyDef.position.Set(200.0f,-250);
			shapeDef.SetAsBox(100.0f, 10.0f);
			fixtureDef.shape = &shapeDef;
			groundBody = world->CreateBody(&bodyDef);
			groundBody->CreateFixture(&fixtureDef);

			// Create lots of little colored triangles, random pos, rotation, color.
			for (int i = 0; i < BODYCOUNT; ++i) {
				//poly << QPointF(0, -10) << QPointF(-5, 0) << QPointF(5, 0);
				Bot* polygon = bodyItems[i] = new Bot(world);
				polygon->setPos(200+-20 + qrand() % 40,200+ -75 - qrand() % 150);
				polygon->setRotation(qrand() % 360);
				polygon->setBrush(QColor(128 + qrand() % 128, 128 + qrand() % 128, 128 + qrand() % 128));
				polygon->_init();
				scene->addItem(polygon);
			}
}