Board game: Move entity direction based on position and angle

Question

I have a board game where you have entities on a tiled map and you can only move forward, left, and right. Each tile represents a position of the entity, and based on the entity's angle and position, I need to make a method that processes the move. For example if the entity has decided to move left, my function needs to perform a left movement.

An example:

My ship is currently on the tile where the arrow starts and the entity selected to move left, the arrow represents how the entity should move, with a motion.

So it slowly goes up and then slowly starts to go left and changing its rotation.

My question is, how can I make such a function which will know the entity's position, current angle (rotation), and where it should move to, and then with these parameters, it will process the movement animation motion to the target tile?

I am trying to solve this for a long time now, but no luck. Thank you a lot!

Answer 1

Something like this:

Vector2 prevGridTile = new Vector2();
Vector2 currentGridTile = new Vector2();
bool allowRightMovement = true;

enum facingStates {LEFT, RIGHT, UP, DOWN}
facingStates currentFacingState = facingStates.RIGHT; // just a randomly    picked default as right, you could set this to how it starts

void update()

if (prevGridTile.x > currentGridTile.x){
currentFacingState = facingStates.LEFT;
}
// etc etc etc for each case


// then to access that information, you can do switch:

switch (currentFacingState){
    case facingStates.LEFT:
        allowRightMovement = false;
        break;
    case facingStates.RIGHT:
        allowLeftMovement = false;
        break;
    case ETC ETC ETC:
        break;
       }
}

This was just a quick example i knocked up without seeing your code. This is c# and pretty much same in java. Of course , this wont work just pasted in youll have to adapt it to your own project. Hope it works out for u