Help with project

[maxudaskin]

I am in the homestretch of my project that I have for school but I ran into a snag.

My Program is based on the battleship game. It has ships set using arrays (see code: 01.t) and I need to know if there is a way to see if the mouse x and y co-ordinates can be compared to the ships location.

code:

% 01.t % This program defines where ships are set % Declaration Statement var carrier_x : array 1 .. 5, 1 .. 2 of int % Aircraft Carrier var carrier_y : array 1 .. 5, 1 .. 2 of int var btlship_x : array 1 .. 4, 1 .. 2 of int % Battleship var btlship_y : array 1 .. 4, 1 .. 2 of int var destroy_x : array 1 .. 3, 1 .. 2 of int % Destroyer var destroy_y : array 1 .. 3, 1 .. 2 of int var submarn_x : array 1 .. 3, 1 .. 2 of int % Submarine var submarn_y : array 1 .. 3, 1 .. 2 of int var patrolb_x : array 1 .. 2, 1 .. 2 of int % Patrol Boat var patrolb_y : array 1 .. 2, 1 .. 2 of int

Let me explain the array..

var patrolb_y : array 1 .. 2, 1 .. 2 of int

Length of ship in units
(1) is starting x (or y) co-ordinate; (2) is ending x (or y) co-ordinate

code:

procedure drawBoard     % Player's Board     for x : 2 .. 227 by 25         for y : 2 .. 202 by 25             drawbox (x, y, x + 25, y + 25, 7)         end for     end for     % Opponent's Board     for x : 256 .. 483 by 25         for y : 2 .. 202 by 25             drawbox (x, y, x + 25, y + 25, 7)         end for     end for end drawBoard

The screen resolution is 508 by 350.

[Zampano]

It's not beyond the means of some humble ingenious thought. In your drawboard procedure, you drew a line at a certain coordinate according to the array indice that the for loop counter suggests. Try and work that same logic backwards so that, given a coordinate, you could derive the array indice.

[maxudaskin]

The reason I was asking, is because I want to try not to do many if statements... I am not too proficient with Turing.

[DemonWasp]

1. The best way to get proficient is by writing some code. If you want to get proficient, trial and error is honestly far more enlightening than you'd think.

2. As Zampano says, you already have the right idea. Your code for drawing the boards is the hint.

Hint: You know the coordinates for each square in each board, because you've already written a set of nested for loops to handle each.

Hint: For example, take a mouse click at (120, 90). This is outside the boundaries of the opponents array, so we'll completely ignore that array. However, it's inside the boundaries of your player's grid, so you have to check against that.

Hint: The example mouse click at (120, 90) is offset from the upper-left corner of your board by (118, 88) - take each coordinate and subtract the array starting positions given in your for loops.

Hint: Now each grid box takes up 25 pixels. I'm sure you and division can work out that the click at offset (118, 88) works out to (4.72, 3.52). Take the floor of each of those and you notice we have array coordinates (4, 3). Those are the coordinates in your grid (though Turing's arrays start at 1, so you may have to add one to each value).

[jeffgreco13]

Trial and error is like the basis of programming in my eyes. There's no concrete answer for anything in programming, so you've got to try and try and try until you get what you want. And along the way you'll learn so many new things, which will in the future make programming easier and more rewarding.

[Insectoid]

If statements are the most commonly used function (or whatever they are) in almost every game. If you don't want to use many of them, don't do a game; do an animation.