Moving Platforms Changing Direction

[Abdur Olajuwon]

I been trying to code a way on how to change directions of moving platforms, without using some type of block as an barrier.

Here is what i have so far. For some reason, when I insert the code and play the game, i get a compile error saying that i got a malformed "if" statement

Step Event:

vsp = dir * movespeed;


// Move Directions

if reverse_direction = 1{
    alarm[0] = 40;
    reverse_direction = 0;
}
 
//Vertical Collision

if (place_meeting(x,y+vsp,obj_wall))
{
    while(!place_meeting(x,y+sign(vsp),obj_wall))
    {
    y += sign (vsp);
    }
    vsp = 0;
   
    dir *= -1;

}
y += vsp;

if (instance_exists(obj_Klover))
{
    if round (obj_Klover.y + (obj_Klover.sprite_height/2) > y) || (obj_Klover.key_down) mask_index = -1;
    else
    {
    mask_index = spr_platform;
    if place_meeting(x,y-1,obj_Klover)
    {
        obj_Klover.vsp_carry = vsp;
    }
   
    }  
 }

Alarm Event:

vspeed = vspeed
reverse_direction = 1

 

[Joe Ellis]

if reverse_direction = 1;{

youv got a ; on the if

thats all it is lol

 

[Abdur Olajuwon]

youv got a ; on the if

thats all it is lol

your right,lol. I didn't even noticed about that and the game working now, but the moving platforms wont change direction for some reason and i need some help with that

 

[Joe Ellis]

I'm not sure why it wont work, but

// Move Directions

if reverse_direction = 1{
    alarm[0] = 40;
    reverse_direction = 0;
}

vspeed = vspeed
reverse_direction = 1

none of this is doing anything, vspeed=vspeed is like changing 20 into 20 lol

and nothing is happening with the dir when reverse_direction=1

but I dont see why
dir *= -1;
wont work, I might look at it in gm and test it, are you new at gml? you seem experienced in some other language

 

[Joe Ellis]

it will have to be tomorrow now though, as I'm going to bed, goodnight

 

[Abdur Olajuwon]

I'm not sure why it wont work, but

// Move Directions

if reverse_direction = 1{
    alarm[0] = 40;
    reverse_direction = 0;
}

vspeed = vspeed
reverse_direction = 1

none of this is doing anything, vspeed=vspeed is like changing 20 into 20 lol

and nothing is happening with the dir when reverse_direction=1

but I dont see why
dir *= -1;
wont work, I might look at it in gm and test it, are you new at gml? you seem experienced in some other language

I'm not experience,lol. Its code which i found on a tutorial on youtube about moving platforms. I'm still learning the game maker language and I been trying to learn it for about a month now( or 2).

 

[TheouAegis]

You should study the manual and the tutorials that are available for direct download in Studio rather than YouTube tutorials which are often buggy or illegible.

 

[Joe Ellis]

Here is an example project for moving platforms
you can set them at any angle you want in the create event and they will collide with the level and also randomly change direction

http://www.filedropper.com/movingplatforms_1

It should help point you in the right direction