How to Create a 2D Snake Game in Flutter

Jan 17 2023 · Dart 2.17, Flutter 3.0, Android Studio or VS Code

Part 1: How to Create a 2D Snake Game in Flutter

05. Move the Pieces to Next Position

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Previous episode: 04. Create Piece Positions Next episode: 06. Draw the Snake

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In this video, you will be changing the positions stored in the positions list. This will be done with the following considerations in mind.

void draw() async {
  ...
  
  // Add this
  for (int i = positions.length - 1; i > 0; i--) {
    positions[i] = positions[i - 1];
  }
}

positions[0] = getNextPosition(positions[0]);

Offset getNextPosition(Offset position) {}

Offset getNextPosition(Offset position) {
    Offset nextPosition;

    if (direction == Direction.right) {
      nextPosition = Offset(position.dx + step, position.dy);
    } else if (direction == Direction.left) {
      nextPosition = Offset(position.dx - step, position.dy);
    } else if (direction == Direction.up) {
      nextPosition = Offset(position.dx, position.dy - step);
    } else if (direction == Direction.down) {
      nextPosition = Offset(position.dx, position.dy + step);
    }

    return nextPosition;
  }