Help figuring out pacman barrier collision detect

[rasheemo]

Im making a pacman game, and im trying to figure out how to draw the barriers and make sure pacman cant cross the walls. How do i approach this? Thank you muchly.

im obviously no pro, so go easy on me :P

[rasheemo]

anyone? please?

[Phaelax]

Store your map as a 2D grid.

0 = clear
1 = dot
2 = wall

Decide the size of each wall segment, say 10x10. So every 10 units you'd have a new wall segment or square from the grid.

- player_controls
- store old pacman position
- update new pacman position variables
- check where in grid new pacman position is. If its a wall, change position variables to old pacman position.
- draw pacman

So if pacman is at 152,36 in world coordinates, to find that in grid coordinates, divide by the dimensions of a grid square (10x10).

int gx = 152/10  //15
int gy = 36/10    //3

if (map[gx][gy] == 2) //pacman hit a wall
{
    pacX = oldX
    pacY = oldY
}
else if ( == 1) //pacman ate a dot
{
    map[][] = 0
    score++;
}

[rasheemo]

wow thank you so much, i would never have thought of that!