public void move()
{
this.velocity -= this.gravity;
this.velocity *= 0.4f;
this.y += this.velocity;
// Keep it stuck to top or bottom
float height = -ScreenUtils.GetWorldScreenSize().y / 2f;
if (this.y < height)
{
this.y = height;
this.velocity = 0f;
}
if (this.y > 5f)
{
this.y = 5f;
this.velocity = 0f;
}
Vector3 pos = gameObject.transform.localPosition;
pos.y = this.y;
gameObject.transform.localPosition = pos;
// Every frame it is alive increases the score
this.score++;
}
public bool OffScreen()
{
if (this.x < -this.w - (ScreenUtils.GetWorldScreenSize().x / 2f))
{
return(true);
}
else
{
return(false);
}
}
// Use this for initialization
void Start()
{
float diffY = ScreenUtils.GetWorldScreenSize().y / 2f;
// How big is the empty space
float spacing = Random.Range(3f, ScreenUtils.GetWorldScreenSize().y / 2f);
// Where is the center of the empty space
float centery = Random.Range(spacing, ScreenUtils.GetWorldScreenSize().y - spacing);
this.top = centery - spacing / 2;
this.bottom = ScreenUtils.GetWorldScreenSize().y - (centery + spacing / 2);
this.x = ScreenUtils.GetWorldScreenSize().x / 2f;
this.w = 1f;
this.speed = 0.16f;
Vector3 topPos = topPipe.transform.localPosition;
Vector3 btmPos = btmPipe.transform.localPosition;
Vector3 topSc = topPipe.transform.localScale;
Vector3 btmSc = btmPipe.transform.localScale;
topPos.y = diffY - (this.top / 2f);
topSc.y = this.top;
btmPos.y = -diffY + (this.bottom / 2f);
btmSc.y = this.bottom;
topPipe.transform.localPosition = topPos;
topPipe.transform.localScale = topSc;
btmPipe.transform.localPosition = btmPos;
btmPipe.transform.localScale = btmSc;
Vector3 pos = gameObject.transform.localPosition;
pos.y = 0f;
pos.z = 0f;
gameObject.transform.localPosition = pos;
UpdatePosition();
/* make sure top and bottom position
* topPos.x = 0.6f;
* topPos.y = diffY-this.top;
* btmPos.x = 0.6f;
* btmPos.y = -diffY+this.bottom;
* t.transform.localPosition = topPos;
* b.transform.localPosition = btmPos;
*/
}
public bool Hits(Bird bird)
{
float diffY = ScreenUtils.GetWorldScreenSize().y / 2f;
float top = (diffY - (this.top));
if ((bird.y + (bird.r / 2f)) > top || (bird.y - (bird.r / 2f)) < -diffY + (this.bottom))
{
if (bird.x > this.x && bird.x < this.x + (this.w / 2f))
{
return(true);
}
}
return(false);
}
public void think(List <GameObject> pipes)
{
// First find the closest pipe
Pipe closest = null;
float record = Mathf.Infinity;
for (var i = 0; i < pipes.Count; i++)
{
Pipe p = pipes [i].GetComponent <Pipe> ();
float diff = p.x - this.x;
if (diff > 0 && diff < record)
{
record = diff;
closest = pipes[i].GetComponent <Pipe>();
}
}
if (closest != null)
{
// Now create the inputs to the neural network
List <float> inputs = new List <float>();
// x position of closest pipe
float diffY = ScreenUtils.GetWorldScreenSize().y / 2f;
float i0 = map(closest.x, this.x, ScreenUtils.GetWorldScreenSize().x / 2f, -1f, 1f);
inputs.Add(i0);
// top of closest pipe opening
float i1 = map(diffY - closest.top, -ScreenUtils.GetWorldScreenSize().y / 2f, ScreenUtils.GetWorldScreenSize().y / 2f, -1f, 1f);
inputs.Add(i1);
// bottom of closest pipe opening
float i2 = map(-diffY + closest.bottom, -ScreenUtils.GetWorldScreenSize().y / 2f, ScreenUtils.GetWorldScreenSize().y / 2f, -1f, 1f);
inputs.Add(i2);
// bird's y position
float i3 = map(this.y, -ScreenUtils.GetWorldScreenSize().y / 2f, ScreenUtils.GetWorldScreenSize().y, -1f, 1f);
inputs.Add(i3);
// Get the outputs from the network
List <float> action = this.brain.feedforward(inputs);
// Decide to jump or not!
if (action[1] > action[0])
{
this.up();
}
}
}
public void Init(NeuralNetwork _brain)
{
// position and size of bird
this.x = -(ScreenUtils.GetWorldScreenSize().y / 2f) + 1f;
this.y = ScreenUtils.GetWorldScreenSize().y / 2f;
this.r = 0.5f;
// Gravity, lift and velocity
this.gravity = 0.4f;
this.lift = 1.3f;
this.velocity = 0f;
// Is this a copy of another Bird or a new one?
// The Neural Network is the bird's "brain"
if (_brain is NeuralNetwork)
{
this.brain = _brain.copy();
this.brain.mutate();
}
else
{
this.brain = new NeuralNetwork(4, 16, 2);
}
// Score is how many frames it's been alive
this.score = 0;
// Fitness is normalized version of score
this.fitness = 0f;
Vector3 pos = gameObject.transform.localPosition;
pos.x = this.x;
pos.y = this.y;
gameObject.transform.localPosition = pos;
}
