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rougelike game dev help needed with wall collison detection!!!

Mar 19, 2013 at 11:58pm
klay2 (84)
Hello I am new to these forums and need help, I walking through walls. I found its the if statements but I cant find the bug. (keep in mind still a huge work in progress.)

walls are nines and to move hit a w a s d key then enter

p.s. I am 12 years old so please don't judge me for my mistakes thanks!

os: windows 8

compiler: Microsoft visual c++ 2010 express

here is my code:

#include <iostream>
#include <string>
using namespace std;
int main()
{

int wc = 9;

//command var.

string command ;

//end

//worldsize

int world[6][4];

//end

//spawn pos.

int x = 3;
int y = 2;

//end

start:

//map

world[0][0] = 9;
world[1][0] = 9;
world[2][0] = 9;
world[3][0] = 9;
world[4][0] = 9;
world[5][0] = 9;
world[6][0] = 9;
world[0][1] = 9;
world[1][1] = 0;
world[2][1] = 0;
world[3][1] = 0;
world[4][1] = 0;
world[5][1] = 0;
world[6][1] = 9;
world[0][2] = 9;
world[1][2] = 0;
world[2][2] = 0;
world[3][2] = 0;
world[4][2] = 0;
world[5][2] = 0;
world[6][2] = 9;
world[0][3] = 9;
world[1][3] = 0;
world[2][3] = 0;
world[3][3] = 0;
world[4][3] = 0;
world[5][3] = 0;
world[6][3] = 9;
world[0][4] = 9;
world[1][4] = 9;
world[2][4] = 9;
world[3][4] = 9;
world[4][4] = 9;
world[5][4] = 9;
world[6][4] = 9;

//end

//wall collide script

if(wc = world[x][y])
{
if( command == "w") y = y - 1;
if( command == "s") y = y + 1;
if( command == "a") x = x + 1;
if( command == "d") x = x - 1;

}

//end

//avatar

world[x][y] = 1;

//end

//graphics script

cout << world[x+2][y+1];
cout << world[x-1][y+1];
cout << world[x][y+1];
cout << world[x-1][y+1];
cout << world[x-2][y+1];
cout << endl;
cout << world[x+2][y];
cout << world[x+1][y];
cout << world[x][y];
cout << world[x-1][y];
cout << world[x-2][y];
cout << endl;
cout << world[x+2][y-1];
cout << world[x+1][y-1];
cout << world[x][y-1];
cout << world[x-1][y-1];
cout << world[x-2][y-1];
cout << endl;

//end

//movement script

cin >> command;
if (command == "w") y = y + 1;
if (command == "s") y = y - 1;
if (command == "d") x = x - 1;
if (command == "a") x = x + 1;

//end

goto start;

return 0;

}
Last edited on Mar 20, 2013 at 9:00pm
Mar 20, 2013 at 7:47pm
Stormhawk (86)
Congratz on trying to learn C++ :D. Just to give you a helping hand there is a button when your writting your messages on here So that when you add code it looks all fancy and neat. 


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here is my code:

#include <iostream>
#include <string>

using namespace std;


int main()
{

     int wc = 9;

     int x1;
     int y1;

     //command var.

     string command ;

     //end

    //worldsize

     int world[6][4];

     //end

     //spawn pos.

     int x = 3;
     int y = 2;

     //end

     start:

     //map

     world[0][0] = 9;
     world[1][0] = 9;
     world[2][0] = 9;
     world[3][0] = 9; 
     world[4][0] = 9;
     world[5][0] = 9;
     world[6][0] = 9;
     world[0][1] = 9;
     world[1][1] = 0;
     world[2][1] = 0;
     world[3][1] = 0;
     world[4][1] = 0;
     world[5][1] = 0;
     world[6][1] = 9;
     world[0][2] = 9;
     world[1][2] = 0;
     world[2][2] = 0;
     world[3][2] = 0;
     world[4][2] = 0;
     world[5][2] = 0;
     world[6][2] = 9;
     world[0][3] = 9;
     world[1][3] = 0;
     world[2][3] = 0;
     world[3][3] = 0;
     world[4][3] = 0;
     world[5][3] = 0;
     world[6][3] = 9;
     world[0][4] = 9;
     world[1][4] = 9;
     world[2][4] = 9;
     world[3][4] = 9;
     world[4][4] = 9;
     world[5][4] = 9;
     world[6][4] = 9;

     //end

     //wall collide script

     if(wc = world[x][y])
     {
          if( command == "w") y = y + 1;
          if( command == "s") y = y - 1;
          if( command == "a") x = x - 1;
          if( command == "d") x = x + 1;

     }

     //end

     //avatar	

     world[x][y] = 1;

     //end

     //graphics script

     cout << world[x+2][y+1];
     cout << world[x-1][y+1];
     cout << world[x][y+1];
     cout << world[x-1][y+1];
     cout << world[x-2][y+1];
     cout << endl;
     cout << world[x+2][y];
     cout << world[x+1][y];
     cout << world[x][y];
     cout << world[x-1][y];
     cout << world[x-2][y];
     cout << endl;
     cout << world[x+2][y-1];
     cout << world[x+1][y-1];
     cout << world[x][y-1];
     cout << world[x-1][y-1];
     cout << world[x-2][y-1];
     cout << endl;

     //end

     //movement script

     cin >> command;
     if (command == "w") y = y + 1;
     if (command == "s") y = y - 1;
     if (command == "d") x = x - 1;
     if (command == "a") x = x + 1;

     //end

     goto start;

     return 0;

}
Edit & run on cpp.sh



I just looked at it and at least from the quick look I got. your wall collision and movement O_o look to be the same. You tell it to do the same thing
Last edited on Mar 20, 2013 at 7:56pm
Mar 20, 2013 at 8:54pm
klay2 (84)
still wont work!?!?!?
Last edited on Mar 20, 2013 at 8:57pm
Mar 20, 2013 at 9:01pm
Warnis (230)
Well, there's no collision detection at all, so not really all that surprising that you're walking through walls. You should check if the position you're moving to is a wall or not before you actually move. Which means that you should simply check if world[x][y+1] == 9 if you're moving up. And like Stormhawk44 said your collision and movement are the same, so just get rid of the collision one for now.
Mar 20, 2013 at 10:49pm
klay2 (84)
actually I changed that... I think
Mar 20, 2013 at 10:51pm
klay2 (84)
tried it still wont work!?!?!?
Mar 20, 2013 at 11:01pm
Warnis (230)
What exactly did you do? Post the part of your code that you changed
Mar 20, 2013 at 11:09pm
klay2 (84)
is that bad
Mar 20, 2013 at 11:16pm
Warnis (230)
No?
I just won't be able to help if I don't know what you did
Mar 20, 2013 at 11:18pm
klay2 (84)
well yes I did that
Mar 20, 2013 at 11:21pm
klay2 (84)
well I stopped though
Mar 20, 2013 at 11:33pm
Warnis (230)
if (command == "w" && world[x][y+1] != 9) y = y + 1;
Is what you did similar to this?
Mar 20, 2013 at 11:35pm
klay2 (84)
kinda here it is
//wall collide script

if(world[x][y+1] == 9)
{
if( command == "w") y = y - 1;

}

if(world[x][y-1] == 9)
{
if( command == "s") y = y + 1;

}

if(world[x][x-1] == 9)
{
if( command == "a") x = x + 1;

}

if(world[x][x+1] == 9)
{
if( command == "d") x = x - 1;

}
Mar 20, 2013 at 11:42pm
Warnis (230)
Change it to
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if (command == "w" && world[x][y+1] != 9) y = y + 1;
if (command == "s" && world[x][y-1] != 9) y = y - 1;
if (command == "d" && world[x-1][y] != 9) x = x - 1;
if (command == "a" && world[x+1][y] != 9) x = x + 1;

and it should work just fine
Last edited on Mar 20, 2013 at 11:42pm
Mar 20, 2013 at 11:43pm
klay2 (84)
still wont work???
Last edited on Mar 20, 2013 at 11:44pm
Mar 20, 2013 at 11:47pm
Warnis (230)
Here's the entire code

Note that I removed the wall collision check scrip part of the code, before you would move two steps every time.

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#include <iostream>
#include <string>

using namespace std;


int main()
{

     int wc = 9;

     int x1;
     int y1;

     //command var.

     string command ;

     //end

    //worldsize

     int world[6][4];

     //end

     //spawn pos.

     int x = 3;
     int y = 2;

     //end

     start:

     //map

     world[0][0] = 9;
     world[1][0] = 9;
     world[2][0] = 9;
     world[3][0] = 9; 
     world[4][0] = 9;
     world[5][0] = 9;
     world[6][0] = 9;
     world[0][1] = 9;
     world[1][1] = 0;
     world[2][1] = 0;
     world[3][1] = 0;
     world[4][1] = 0;
     world[5][1] = 0;
     world[6][1] = 9;
     world[0][2] = 9;
     world[1][2] = 0;
     world[2][2] = 0;
     world[3][2] = 0;
     world[4][2] = 0;
     world[5][2] = 0;
     world[6][2] = 9;
     world[0][3] = 9;
     world[1][3] = 0;
     world[2][3] = 0;
     world[3][3] = 0;
     world[4][3] = 0;
     world[5][3] = 0;
     world[6][3] = 9;
     world[0][4] = 9;
     world[1][4] = 9;
     world[2][4] = 9;
     world[3][4] = 9;
     world[4][4] = 9;
     world[5][4] = 9;
     world[6][4] = 9;

     //end



     //end

     //avatar	

     world[x][y] = 1;

     //end

     //graphics script

     cout << world[x+2][y+1];
     cout << world[x-1][y+1];
     cout << world[x][y+1];
     cout << world[x-1][y+1];
     cout << world[x-2][y+1];
     cout << endl;
     cout << world[x+2][y];
     cout << world[x+1][y];
     cout << world[x][y];
     cout << world[x-1][y];
     cout << world[x-2][y];
     cout << endl;
     cout << world[x+2][y-1];
     cout << world[x+1][y-1];
     cout << world[x][y-1];
     cout << world[x-1][y-1];
     cout << world[x-2][y-1];
     cout << endl;

     //end

     //movement script

     cin >> command;
     if (command == "w" && world[x][y+1] != 9) y = y + 1;
     if (command == "s" && world[x][y-1] != 9) y = y - 1;
     if (command == "d" && world[x-1][y] != 9) x = x - 1;
     if (command == "a" && world[x+1][y] != 9) x = x + 1;

     //end

     goto start;

     return 0;

}
Edit & run on cpp.sh
Mar 20, 2013 at 11:50pm
klay2 (84)
Thanks!!! this is great just great thanks a million times thanks!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

again TTTTTTTTTTTTTTTTTHHHHHHHHHHHHHHHHHHHHAAAAAAAAAAAAAAANNNNNNNNNNNNNNNNNNKKKKKKKKKKKKKKKKKKKKSSSSSSSSSSSSSSSSSSSSSSSSS!!!!!!!!!!!!!!!!!!!!!!!!!!
Mar 20, 2013 at 11:54pm
Warnis (230)
Right then, if you feel like you need to know more of the language you should check out the tutorial on the site, it should put you on the right track
http://cplusplus.com/doc/tutorial/
You probably have a decent understanding of the basics and should be able to jump into the control structures and functions
Last edited on Mar 20, 2013 at 11:54pm
Mar 20, 2013 at 11:56pm
klay2 (84)
haha that's where I learned!!!
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