void Player::Initialize(Graphics *graphics)
{
_moveSpeed = 3.0f;
BodyNode *head = new BodyNode();
head->Initialize(graphics);
head->SetDirection(BodyNode::LEFT);
head->moveSpeed = _moveSpeed;
head->active = true;
numCubes = 1;
// Create first node for the player.
_body.push_back(head);
_difference = 0.0f;
}
void Player::Update(float dt)
{
bool canTurn = false;
_difference += dt;
if (_difference > 0.5f)
{
_difference -= 0.5f;
canTurn = true;
}
// If we've moved enough to warrant a turn, let's see what direction we'll be going in.
if (canTurn && _nextDirection.size() > 0)
{
// Get the new direction.
BodyNode::Direction newDirection = _nextDirection[0];
BodyNode::Direction oldHeadDirection = GetHeadDirection();
_nextDirection.erase(_nextDirection.begin());
// Set the head's direction.
_body[0]->SetDirection(newDirection);
// If we've got nodes, and we're moving in a new direction, we have to update the body!
if (_body.size() > 1 && oldHeadDirection != newDirection)
{
BodyNode::DirectionPair pair;
pair.direction = newDirection;
pair.pivot = _body[0]->GetTransform().position;
// Update the body.
for (int bodyIndex = 1; bodyIndex < _body.size(); bodyIndex++)
{
_body[bodyIndex]->directionChange.push_back(pair);
}
}
}
// Move player based on current direction.
for (int bodyIndex = _body.size() - 1; bodyIndex >= 0; bodyIndex--)
{
BodyNode *currentNode = _body[bodyIndex];
bool canMove = true;
if (_body.size() > 1 && bodyIndex > 0)
{
BodyNode *nextNode = _body[bodyIndex - 1];
Vector3 currentPosition = currentNode->GetTransform().position;
/* If we're at the last piece of the body and it's just been added, we don't want it to move until the previous piece is
* far enough away so we don't risk colliding with it. */
if (bodyIndex == _body.size() - 1 && currentNode->active == false)
{
Vector3 nextBodyPiecePosition = nextNode->GetTransform().position;
float distance = Vector3::Magnitude(Vector3::Difference(currentPosition, nextBodyPiecePosition));
// Make sure it's far enough away before we say it's okay.
if (distance >= 1.0f)
{
currentNode->active = true;
currentNode->SetDirection(nextNode->GetDirection());
switch (nextNode->GetDirection())
{
case BodyNode::UP:
currentNode->GetTransform().position.x = nextNode->GetTransform().position.x;
currentNode->GetTransform().position.y = nextNode->GetTransform().position.y - 1.0f;
break;
case BodyNode::DOWN:
currentNode->GetTransform().position.x = nextNode->GetTransform().position.x;
currentNode->GetTransform().position.y = nextNode->GetTransform().position.y + 1.0f;
break;
case BodyNode::LEFT:
currentNode->GetTransform().position.x = nextNode->GetTransform().position.x + 1.0f;
currentNode->GetTransform().position.y = nextNode->GetTransform().position.y;
break;
case BodyNode::RIGHT:
currentNode->GetTransform().position.x = nextNode->GetTransform().position.x - 1.0f;
currentNode->GetTransform().position.y = nextNode->GetTransform().position.y;
break;
}
}
}
else
{
float nextNodeDifference = Vector3::Magnitude(Vector3::Difference(nextNode->GetTransform().position, currentNode->GetTransform().position));
// Move other pieces.
if (currentNode->directionChange.size() > 0)
{
BodyNode::DirectionPair pair = currentNode->directionChange[0];
Vector3 directionChange = pair.pivot;
float difference = Vector3::Magnitude(Vector3::Difference(directionChange, currentNode->GetTransform().position));
// Ensure that we're close enough to the pivot.
if (difference <= 0.05f)
{
currentNode->SetDirection(BodyNode::NONE);
currentNode->GetTransform().position = directionChange;
// Ensure that we're far enough away from the previous node before moving.
if (nextNodeDifference >= 1.0f)
{
currentNode->SetDirection(pair.direction);
currentNode->directionChange.erase(currentNode->directionChange.begin());
}
}
}
if (nextNodeDifference > 1.25f)
{
switch (nextNode->GetDirection())
{
case BodyNode::UP:
currentNode->GetTransform().position.x = nextNode->GetTransform().position.x;
currentNode->GetTransform().position.y = nextNode->GetTransform().position.y - 1.0f;
break;
case BodyNode::DOWN:
currentNode->GetTransform().position.x = nextNode->GetTransform().position.x;
currentNode->GetTransform().position.y = nextNode->GetTransform().position.y + 1.0f;
break;
case BodyNode::LEFT:
currentNode->GetTransform().position.x = nextNode->GetTransform().position.x + 1.0f;
currentNode->GetTransform().position.y = nextNode->GetTransform().position.y;
break;
case BodyNode::RIGHT:
currentNode->GetTransform().position.x = nextNode->GetTransform().position.x - 1.0f;
currentNode->GetTransform().position.y = nextNode->GetTransform().position.y;
break;
}
currentNode->directionChange.clear();
currentNode->directionChange = nextNode->directionChange;
currentNode->SetDirection(nextNode->GetDirection());
}
}
}
currentNode->Update(dt);
}
}