4 replies to this topic

[v0xc]

I'm making a door which opens when touched and then closes when touched again and opens when touched again and on and on.
But there's a problem, it loops, first it checks if the 'open' value is 0 then turns it into 1, then after that it checks if it is 1 then changes it back to 0.

if (open=0)
{
    solid=false;
    open=1;
    sprite_index=spr_door;
    image_index=2;
    image_speed=0;
}
if (open=1)
{
    solid=true;
    open=0;
    sprite_index=spr_door;
    image_index=1;
    image_speed=0;
}

How do I fix this?

[iPhoenix]

There are multiple ways to solve this. The most "clean" one is probably using a switch-statement:

switch open
{ case 0:
    solid=false;
    open=1;
    sprite_index=spr_door;
    image_index=2;
    image_speed=0;
    break;

  case 1:
    solid=true;
    open=0;
    sprite_index=spr_door;
    image_index=1;
    image_speed=0;
    break; }

[LSnK]

Use if-else.

if (open==0)
{
    solid=false;
    open=1;
    sprite_index=spr_door;
    image_index=2;
    image_speed=0;
}
else
{
    solid=true;
    open=0;
    sprite_index=spr_door;
    image_index=1;
    image_speed=0;
}

[Davve]

More compact version:

open!=open
sprite_index=spr_door
solid=open
image_index=1+!open
image_speed=0

[v0xc]

Thanks, both worked.
Follow-up question: how do I make it not solid for a certain object but solid for others?