Patrolling enemy.

[Burusagi]

Anyone have any points in how to code one? I'm thinking of simply making an obj_enemy with a Speed variable and then changing it's x-position every Step, and then somehow use a Timer to turn a positive Speed variable into a negative one - wouldn't that make it turn the other direction?

[sitebender]

if ( LR )
{
x -= spd
if ( x < xstart - 100)
{
LR = !LR
}
}else
{
x += spd
if ( x > xstart + 100)
{
LR = !LR
}
}

// this is as simple a code as I can provide.

[Diveyoc]

I'm still experimenting myself, but this seems like a nice command. By selecting false for the last symbol, enemy checks for solid objects and will try to avoid them.

mp_potential_step(obj_player.x,obj_player.y, 2, false);

And,
motion_set(choose(0, 45, 90, 135, 180, 225, 270, 315), 2);

Will make enemy choose a random direction.

[Burusagi]

Originally posted by sitebender:

if ( LR )
{
x -= spd
if ( x < xstart - 100)
{
LR = !LR
}
}else
{
x += spd
if ( x > xstart + 100)
{
LR = !LR
}
}

// this is as simple a code as I can provide.

Don't take this the wrong way, as I definitely appreciate the reply, but any chance you could elaborate? Because just copy/paste'ing code I don't really learn! :3

[Curious Duck]

https://youtu.be/LYAskDJ75Ss
https://youtu.be/DG1L2Fbrhlg
https://youtu.be/pNg9axObUbk
Without specific which type of game it's for (top down, platform etc) I've posted the videos above in an open response of helping.

[Burusagi]

Oh, it's a basic 2D sidescroller, so it basically just needs to walk left and right.

[Curious Duck]

Then look at this
https://youtu.be/S-F51V01zXM

[sitebender]

Originally posted by Alcohol Fueled Brewtality:

Originally posted by sitebender:

if ( LR )
{
x -= spd
if ( x < xstart - 100)
{
LR = !LR
}
}else
{
x += spd
if ( x > xstart + 100)
{
LR = !LR
}
}

// this is as simple a code as I can provide.

Don't take this the wrong way, as I definitely appreciate the reply, but any chance you could elaborate? Because just copy/paste'ing code I don't really learn! :3

LR is left right. spd is the speed variable. xstart is where the object starts.

You need to set the spd and LR in the create event.

[Burusagi]

Originally posted by Matt the Duck:

Then look at this
https://youtu.be/S-F51V01zXM

I can't seem to get that to work. The enemy won't move.

Whenever I try and use my created scripts, the text remains golden yellow and not blue as in the video. Is there something I have to do to "enable" my scripts first?

[Diveyoc]

You have to change the font color in global settings to make them come up blue, otherwise they will be yellow by standard default.