void Player::buildPlayerBox2DBody(b2World* world) {
CCPoint position = CCPointZero;
//body definition
b2BodyDef bodyDef;
bodyDef.type = b2_dynamicBody;
bodyDef.fixedRotation = true;
b2Vec2 worldPosition = ViewPort::getInstance()->screenToWorldCoordinate(position);
bodyDef.position.Set(worldPosition.x, worldPosition.y);
//shape definition for main fixture
b2PolygonShape dynamicBox = _profile->spriteBox2DShape();
//fixture definition
b2FixtureDef fixtureDef;
fixtureDef.shape = &dynamicBox;
fixtureDef.density = 1;
fixtureDef.friction = 0.0f; // So the player will be able to slide next to obstacles
fixtureDef.restitution = 0.0f; // So the player will not bounce again from the ground
fixtureDef.filter.groupIndex = -1; //negative so the different players will not collide
//create dynamic body
b2Body *body = world->CreateBody(&bodyDef);
//add main fixture
body->CreateFixture(&fixtureDef);
setB2Body(body);
setPTMRatio(ViewPort::getInstance()->getPTMRatio());
setPosition(position);
}
void Box2DTestLayer::addNewSpriteAtPosition(Point p)
{
CCLOG("Add sprite %0.2f x %02.f",p.x,p.y);
// Define the dynamic body.
//Set up a 1m squared box in the physics world
b2BodyDef bodyDef;
bodyDef.type = b2_dynamicBody;
bodyDef.position.Set(p.x/PTM_RATIO, p.y/PTM_RATIO);
b2Body *body = world->CreateBody(&bodyDef);
// Define another box shape for our dynamic body.
b2PolygonShape dynamicBox;
dynamicBox.SetAsBox(.5f, .5f);//These are mid points for our 1m box
// Define the dynamic body fixture.
b2FixtureDef fixtureDef;
fixtureDef.shape = &dynamicBox;
fixtureDef.density = 1.0f;
fixtureDef.friction = 0.3f;
body->CreateFixture(&fixtureDef);
auto parent = this->getChildByTag(kTagParentNode);
//We have a 64x64 sprite sheet with 4 different 32x32 images. The following code is
//just kdRandomly picking one of the images
int idx = (CCRANDOM_0_1() > .5 ? 0:1);
int idy = (CCRANDOM_0_1() > .5 ? 0:1);
auto sprite = PhysicsSprite::createWithTexture(_spriteTexture,Rect(32 * idx,32 * idy,32,32));
parent->addChild(sprite);
sprite->setB2Body(body);
sprite->setPTMRatio(PTM_RATIO);
sprite->setPosition( Point( p.x, p.y) );
}