private bool MoveIfNeeded()
{
var chunk = chunks[index];
var offset = target.position.x - chunk.position.x;
if (offset > offsetTrigger)
{
// Target is ahead move back chunk forward.
var backChunk = chunks[MathsUtils.Mod(index - indexFromCenterToBack, chunks.Length)];
backChunk.Translate(backToFrontDistance, 0, 0);
if (OnChunkMoved != null)
{
OnChunkMoved(backChunk);
}
index = (index + 1) % chunks.Length;
return(true);
}
else if (offset < -offsetTrigger)
{
// Target is behind move front chunk backward.
var frontChunk = chunks[(index + indexFromCenterToFront) % chunks.Length];
frontChunk.Translate(-backToFrontDistance, 0, 0);
if (OnChunkMoved != null)
{
OnChunkMoved(frontChunk);
}
index = MathsUtils.Mod(index - 1, chunks.Length);
return(true);
}
return(false);
}
/// <summary>
/// The snake make sharp turns left and right and shoots whenever it can.
/// </summary>
public override Action NextAction()
{
// Make sure to move in a stright line.
var rotation = spaceship.Rotation;
// Rotation is in specific degrees so we won't allways be exactly 90
// degrees.
var modAngle = MathsUtils.Mod(rotation, 90f);
if (modAngle > 45f)
{
modAngle = 90f - modAngle;
}
if (modAngle >= Spaceship.ROTATION_PER_ACTION * 0.7f)
{
return(turnDirection);
}
// Checks if we should rotate.
if (Random.value < rotationChance)
{
// Initialize Rotation.
ChooseDirection();
return(turnDirection);
}
return(spaceship.CanShoot ? Shoot.action : DoNothing.action);
}
public void ResetChunks()
{
if (OnChunkMoved != null)
{
for (int i = 0; i < chunks.Length; i++)
{
var chunk = chunks[MathsUtils.Mod(index - indexFromCenterToBack + i, chunks.Length)];
OnChunkMoved(chunk);
}
}
}