Making a Border in turing

[orbez]

What is it you are trying to achieve?
I am attempting to make a game kinda like pac man. In this game a yellow dot can not leave the screen.


What is the problem you are having?
I made a border but you can still exit the screen by spamming/holding an arrow key down, is there a way to change that?


Describe what you have tried to solve this problem
I have tried bouncing the dot back by making the delta x and/or delta y the opposite but since then I have
been specific introductions that the dot much stop at the border.
I also expanded the border but all that does is just delay the out come.
(only included part of my program as it is somewhat long)


Post any relevant code (You may choose to attach the file instead of posting the code if it is too long)

Turing:

%Border     if X <= (R1 + 1) or X >= maxx - (R1 + 1) then         DX := 0     end if     if Y <= (R1 + 1) or Y >= maxy - (R1 + 1) then         DY := 0     end if %Movement/speed     if hasch then         getch (key)         if ord (key) = 205 then             DX := speed             DY := 0         elsif ord (key) = 203 then             DX := -speed             DY := 0         elsif ord (key) = 200 then             DX := 0             DY := speed         elsif ord (key) = 208 then             DX := 0             DY := -speed         end if     end if

Please specify what version of Turing you are using
4.1.1

[Insectoid]

If pac-man ever crosses the border, simply teleport him back to the correct side of it. If the left border is x = 0, then 'if (pacmanX <0) then packmanX := 0'. Tweak to suit your own game.

[orbez]

I have never thought about it that way, thanks man.

[Zren]

Don't move Pacman until you are sure the destination is in bounds.

Eg:

Turing:

type Vector2D :     record         x, y : real     end record var pacman :     record         position : Vector2D         velocity : Vector2D     end record var destination : Vector2D desination.x := pacman.position.x + pacman.velocity.x desination.y := pacman.position.y + pacman.velocity.y % Collision Detection: Walls if ... then % If destination is in bounds      % Move pacman to the destination     pacman.position := destination end if

This way, he's never out of bounds to begin with. Unless of course the walls move and the bounds change from one iteration to the next.

[Zren]

Version without records/types in case they threw you for a loop.

Turing:

var pacmanX, pacmanY, pacmanVelX, pacmanVelY : int loop     %%% Input     % ...     %%% Logic     var pacmanDestinationX, pacmanDestinationY : int     pacmanDestinationX := pacmanX + pacmanVelX     pacmanDestinationY := ...     if 0 <= pacmanDestinationX and pacmanDestinationX <= maxx and ... then         % Move pacman         pacmanX := pacmanDestinationX     else         % Don't move pacman. As he would move into a wall.         % You will most likely have a space between pacman and         % the wall in this case. Insectoid's method to move         % pacmanX to be just touching the left wall (pacmanX=0)         % if pacmanX is past the wall (pacmanX < 0), is the         % easiest way to deal with this.     end if     %%% Draw Frame     % ... end loop

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More on records/types:

There's the Turing Documention on those keywords: record, type

There's also this tutorial Records Part I Declaration and other Introductory Concepts which is part of the greater tutorial called The Turing Walkthrough.

[orbez]

Yeah, this is allot better, I came up with something similar but your code is much smaller and simpler, thanks.