private void Awake()
{
snake = this;
snake.gridPos = new Vector2Int(1, 1);
snake.gridDirection = Direction.Right;
snake.moveTimerMax = .15f;
snake.moveTimer = snake.moveTimerMax;
snake.bodyPositions = new List <SnakeMovePos>();
snake.bodyObjects = new List <SnakeBodySegment>();
snake.bodySize = 3;
snake.gameOverFlag = false;
for (int i = 0; i < bodySize; i++)
{
SnakeMovePos lastMovePos = null;
if (bodyPositions.Count > 0)
{
lastMovePos = bodyPositions[0];
}
snake.bodyPositions.Add(new SnakeMovePos(lastMovePos, snake.gridPos, snake.gridDirection));
snake.addBody();
}
Field.field.spawnFood();
}
private int getAngle(SnakeMovePos movePos)
{
switch (movePos.GetDirection())
{
case Direction.Right:
switch (movePos.getPrevDirection())
{
default:
return(90);
case Direction.Down:
return(45);
case Direction.Up:
return(-45);
}
case Direction.Left:
switch (movePos.getPrevDirection())
{
default:
return(-90);
case Direction.Down:
return(-45);
case Direction.Up:
return(45);
}
case Direction.Up:
switch (movePos.getPrevDirection())
{
default:
return(0);
case Direction.Left:
return(45);
case Direction.Right:
return(-45);
}
case Direction.Down:
switch (movePos.getPrevDirection())
{
default:
return(180);
case Direction.Left:
return(180 - 45);
case Direction.Right:
return(180 + 45);
}
default: return(0);
}
}
// This method rotates the body parts correctly, but since we are using sprites
// that occupy the whole "grid" and are square, we don't need this method.
// If the sprites change to something non-rectangular, uncomment the switch - case portion
public void SetSnakeMovPos(SnakeMovePos snakeMovePos)
{
this.snakeMovePos = snakeMovePos;
transform.position = new Vector3(snakeMovePos.GetGridPos().x, snakeMovePos.GetGridPos().y);
/* ----- UNCOMMENT IF THE SPRITE YOU USE IS NON-RECTANGULAR -----
* float angle;
* switch (snakeMovePos.GetDir())
* {
* default:
* case Dir.Up:
* switch (snakeMovePos.GetPrevDir())
* {
* default:
* angle = 0; break;
* case Dir.Left:
* angle = 45; break;
* case Dir.Right:
* angle = -45; break;
* }
* break;
* case Dir.Down:
* switch (snakeMovePos.GetPrevDir())
* {
* default:
* angle = 180; break;
* case Dir.Down:
* angle = 180 + 45; break;
* case Dir.Up:
* angle = 180 - 45; break;
* }
* break;
* case Dir.Left:
* switch (snakeMovePos.GetPrevDir())
* {
* default:
* angle = -90; break;
* case Dir.Down:
* angle = -45; break;
* case Dir.Up:
* angle = 45; break;
* }
* break;
* case Dir.Right:
* switch (snakeMovePos.GetPrevDir())
* {
* default:
* angle = 90; break;
* case Dir.Down:
* angle = 45; break;
* case Dir.Up:
* angle = -45; break;
* }
* break;
* }
* transform.eulerAngles = new Vector3(0, 0, angle);
*/
}
private void movementHandler()
{
snake.moveTimer += Time.deltaTime;
if (snake.moveTimer >= snake.moveTimerMax)
{
snake.moveTimer -= snake.moveTimerMax;
SnakeMovePos lastMovePos = null;
if (bodyPositions.Count > 0)
{
lastMovePos = bodyPositions[0];
}
snake.bodyPositions.Insert(0, new SnakeMovePos(lastMovePos, snake.gridPos, snake.gridDirection));
snake.gridPos += directionVector();
snake.gridPos = Field.field.checkBoundries(snake.gridPos);
if (Field.field.checkFood(snake.gridPos))
{
SoundManager.playEatSound();
snake.bodySize++;
snake.addBody();
}
if (snake.bodyPositions.Count >= snake.bodySize + 1)
{
snake.bodyPositions.RemoveAt(snake.bodyPositions.Count - 1);
}
foreach (SnakeMovePos snakeMovePos in snake.bodyPositions)
{
if (snake.gridPos == snakeMovePos.getGridPos())
{
SoundManager.playDeathSound();
Game_script.gameOver();
snake.gameOverFlag = true;
}
}
transform.position = new Vector3(gridPos.x, gridPos.y);
transform.eulerAngles = new Vector3(0, 0, angleFromVector(directionVector()) - 90);
snake.updateBody();
snake.lastMoveDir = snake.gridDirection;
}
}
public SnakeMovePos(SnakeMovePos previousSnakeMovePos, Vector2Int gridPos, Dir dir)
{
this.previousSnakeMovePos = previousSnakeMovePos;
this.gridPos = gridPos;
this.dir = dir;
}
//------------------------------------------------------MOVE HANDLER------------------------------------------------------//
// How much time must pass before the next movement action is
// executed. Also tells the LevelGrid where the snake is.
private void MoveHandler()
{
gridMoveTimer += Time.deltaTime;
if (gridMoveTimer >= gridMoveTimerMax)
{
gridMoveTimer -= gridMoveTimerMax;
SoundManager.PlaySound(SoundManager.Sound.SnakeMove);
// Insert the first Index of snakePosHistory to the previous position
SnakeMovePos previousSnakeMovePos = null;
if (snakePosHistoryList.Count > 0)
{
previousSnakeMovePos = snakePosHistoryList[0];
}
// Creating a new position from the snakeMovPos class and inserting
// the position into the snakePosHistory list
SnakeMovePos snakeMovePos = new SnakeMovePos(previousSnakeMovePos, gridPos, moveDir);
snakePosHistoryList.Insert(0, snakeMovePos);
// Movement Logic
Vector2Int gridMoveDirVec;
switch (moveDir)
{
default:
case Dir.Right: gridMoveDirVec = new Vector2Int(1, 0); break;
case Dir.Left: gridMoveDirVec = new Vector2Int(-1, 0); break;
case Dir.Up: gridMoveDirVec = new Vector2Int(0, 1); break;
case Dir.Down: gridMoveDirVec = new Vector2Int(0, -1); break;
}
gridPos += gridMoveDirVec;
// Denying snake access to the outer worlds
gridPos = levelGrid.ValidateGridPos(gridPos);
// If the snake succeeds to eat, it grows and creates a new body part
// The new body part is created from the SnakeBodyPart class
bool snakeAteFood = levelGrid.TryEatFood(gridPos);
if (snakeAteFood)
{
snakeBodySize++;
CreateSnakeBody();
SoundManager.PlaySound(SoundManager.Sound.SnakeEat);
Instantiate(eatEffect, transform.position, Quaternion.identity);
}
// Removing the last snake body part from the list (not to bloat the list)
if (snakePosHistoryList.Count >= snakeBodySize + 1)
{
snakePosHistoryList.RemoveAt(snakePosHistoryList.Count - 1);
}
// Updating the body parts to angle them correctly
// (The current sprite doesnt need a new angle so it's commented out)
UpdateSnakeBodyParts();
// Checking if the head position is the same as a body part position
foreach (SnakeBodyPart snakeBodyPart in snakeBodyPartList)
{
Vector2Int snakeBodyPartGridPos = snakeBodyPart.GetGridPosInSnakeMove();
if (gridPos == snakeBodyPartGridPos)
{
Debug.Log("GAME OVER!!!");
state = State.Dead;
GameHandler.SnakeDied();
SoundManager.PlaySound(SoundManager.Sound.GameOver);
}
}
// Moving the snake to new position and rotating the head
transform.position = new Vector3(gridPos.x, gridPos.y);
transform.eulerAngles = new Vector3(0, 0, GetAngle(gridMoveDirVec) - 90);
}
}
public SnakeMovePos(SnakeMovePos lastMovePos, Vector2Int gridPos, Direction direction)
{
this.lastMovePos = lastMovePos;
this.gridPos = gridPos;
this.direction = direction;
}
public void setMovePos(SnakeMovePos movePos)
{
this.currPos = movePos;
transform.position = new Vector3(this.currPos.getGridPos().x, this.currPos.getGridPos().y);
transform.eulerAngles = new Vector3(0, 0, getAngle(this.currPos));
}
