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Legacy GM Problem with diagonal movement

N

niko_argento

Guest
Hi,in my top down game i created some special movement where the player moves fast from a point to another point,like Flash,for this i use Space key,but one combination doesn´t work at all and the player does not move,these are the main codes in my object player:

Code: 
CREATE EVENT

//initialize variables
image_index=0;
image_speed=0;
global.walkingspeed=3;

STEP EVENT

//aiming and direction

image_angle=direction;
direction=point_direction(x,y,mouse_x,mouse_y);

//movement and animation

if keyboard_check(ord("W")) {y-=global.walkingspeed; image_speed=0.2;}

if keyboard_check(ord("S")) {y+=global.walkingspeed; image_speed=0.2;}

if keyboard_check(ord("A")) {x-=global.walkingspeed; image_speed=0.2;}

if keyboard_check(ord("D")) {x+=global.walkingspeed; image_speed=0.2;}

//stop moving and stop animation
if keyboard_check_released(ord("W")) {y-=0;image_speed=0; image_index=0;}

if keyboard_check_released(ord("S")) {y+=0;image_speed=0; image_index=0;}

if keyboard_check_released(ord("A")) {x-=0;image_speed=0; image_index=0;}

if keyboard_check_released(ord("D")) {x+=0;image_speed=0; image_index=0;}

KEY PRESS EVENT:SPACE

if global.walkingspeed > 1
{
global.walkingspeed=15;
alarm[0]=10;
}

//diagonal move

   if (keyboard_check(ord("D")) && keyboard_check(ord("W")))  direction=45;

   else if (keyboard_check(ord("A")) && keyboard_check(ord("W")))  direction=135;

   else if (keyboard_check(ord("A")) && keyboard_check(ord("S")))  direction=225;

   else if (keyboard_check(ord("S")) && keyboard_check(ord("D")))  direction=315;


ALARM 0 EVENT

global.walkingspeed=3;
image_speed=0;
image_index=0;
The problem is when i press A+W,the player does not move,the other combinations work perfect,what is my mistake here?
 
Bingdom

Bingdom

Googledom
It likely due to your keyboard.

Create a new object, put this in the step event
Code: 
x+= keyboard_check(vk_right) - keyboard_check(vk_left);
y+= keyboard_check(vk_down) - keyboard_check(vk_up);
Try to do that key combination again. If the error persists, it's your keyboard. ;)
 
J

JarodTheGreat

Guest
I tested your code, I seem to not have the issue which you're having problems with. Like Bingdom mention, the issue is probably your keyboard.
 
N

niko_argento

Guest
Bingdom said:
It likely due to your keyboard.

Create a new object, put this in the step event
Code: 
x+= keyboard_check(vk_right) - keyboard_check(vk_left);
y+= keyboard_check(vk_down) - keyboard_check(vk_up);
Try to do that key combination again. If the error persists, it's your keyboard. ;)
Click to expand...
hi,thanks for replying,i missed something,if i move the player normally,the combination A+W works,but in that event,space key event,the same combination does not work.
PD:your key combination works but also mine,the problem is when i add the space bar to that combination
 
Weird Dragon

Weird Dragon

Wizard
GMC Elder
Your code works when you don't press the spacebar because that is only a 2-key combination.
As soon as you have 3 keys pressed there can sometimes be problems on some keyboards with some of the combinations. It is called ghosting.

I have encountered this problem with the combination left arrow - up arrow - spacebar. If I then used the arrow keys on the numpad it worked fine.

Expensive gaming keyboards usually have something called "anti-ghosting". You can google the matter.
 
J

JarodTheGreat

Guest
niko_argento said:
hi,thanks for replying,i missed something,if i move the player normally,the combination A+W works,but in that event,space key event,the same combination does not work.
PD:your key combination works but also mine,the problem is when i add the space bar to that combination
Click to expand...
Yes, even with the space bar I can work all combinations.
 
N

niko_argento

Guest
Weird Dragon said:
Your code works when you don't press the spacebar because that is only a 2-key combination.
As soon as you have 3 keys pressed there can sometimes be problems on some keyboards with some of the combinations. It is called ghosting.

I have encountered this problem with the combination left arrow - up arrow - spacebar. If I then used the arrow keys on the numpad it worked fine.

Expensive gaming keyboards usually have something called "anti-ghosting". You can google the matter.
Click to expand...
hey i didn´t know about this,thanks for the info,so,the only solution for this is buy a new keyboard? or change the commands in my game i guess :(
 
Weird Dragon

Weird Dragon

Wizard
GMC Elder
niko_argento said:
hey i didn´t know about this,thanks for the info,so,the only solution for this is buy a new keyboard? or change the commands in my game i guess :(
Click to expand...
You won't know how other people's keyboard is, so changing the code doesn't help, but making an alternative solution could be an idea so that the user has a choise. It is annoying but not much else you can do as far as I can see.
 
J

JarodTheGreat

Guest
How about something like this

CREATE EVENT:

moveburst = false

SPACE EVENT:

if moveburst = false
{
moveburst = true
alarm[0] = 20
}

ALARM 0 EVENT:

moveburst = false

STEP EVENT:

if moveburst = true { global.walkingspeed = 15 }

if global.walkingspeed = 15
{
if (keyboard_check(ord("D")) && keyboard_check(ord("W"))) direction=45;
else if (keyboard_check(ord("A")) && keyboard_check(ord("W"))) direction=135;
else if (keyboard_check(ord("A")) && keyboard_check(ord("S"))) direction=225;
else if (keyboard_check(ord("S")) && keyboard_check(ord("D"))) direction=315;
}

I have to head to work now. How ever let me know if this worked, if it didn't. I have another option. Best of luck!
 
N

niko_argento

Guest
JarodTheGreat said:
How about something like this

CREATE EVENT:

moveburst = false

SPACE EVENT:

if moveburst = false
{
moveburst = true
alarm[0] = 20
}

ALARM 0 EVENT:

moveburst = false

STEP EVENT:

if moveburst = true { global.walkingspeed = 15 }

if global.walkingspeed = 15
{
if (keyboard_check(ord("D")) && keyboard_check(ord("W"))) direction=45;
else if (keyboard_check(ord("A")) && keyboard_check(ord("W"))) direction=135;
else if (keyboard_check(ord("A")) && keyboard_check(ord("S"))) direction=225;
else if (keyboard_check(ord("S")) && keyboard_check(ord("D"))) direction=315;
}

I have to head to work now. How ever let me know if this worked, if it didn't. I have another option. Best of luck!
Click to expand...
i will try this and then i tell you the results,thanks a lot
 
N

niko_argento

Guest
JarodTheGreat said:
How about something like this

CREATE EVENT:

moveburst = false

SPACE EVENT:

if moveburst = false
{
moveburst = true
alarm[0] = 20
}

ALARM 0 EVENT:

moveburst = false

STEP EVENT:

if moveburst = true { global.walkingspeed = 15 }

if global.walkingspeed = 15
{
if (keyboard_check(ord("D")) && keyboard_check(ord("W"))) direction=45;
else if (keyboard_check(ord("A")) && keyboard_check(ord("W"))) direction=135;
else if (keyboard_check(ord("A")) && keyboard_check(ord("S"))) direction=225;
else if (keyboard_check(ord("S")) && keyboard_check(ord("D"))) direction=315;
}

I have to head to work now. How ever let me know if this worked, if it didn't. I have another option. Best of luck!
Click to expand...
well buddy i tried your code,it works,buuut i got another problem,once the player makes the fast move then the primal speed never returned,so i added this in the alarm event:

global.walkingspeed=3;

and when i tried again,it doesn´t work,like before
 
J

JarodTheGreat

Guest
Forgot to add this to step event, put " if moveburst = false { global.walkingspeed = 3 } " hope this helps!

Update: Just got home and tested the finished code, everything works as should. If you want the .gmz I built, let me know.
 
Last edited by a moderator:
N

niko_argento

Guest
JarodTheGreat said:
Forgot to add this to step event, put " if moveburst = false { global.walkingspeed = 3 } " hope this helps!

Update: Just got home and tested the finished code, everything works as should. If you want the .gmz I built, let me know.
Click to expand...
i think i quit :( it doesn´t work putting if moveburst = false { global.walkingspeed = 3 },the A+W combination does not work,why just that one?
 
Bingdom

Bingdom

Googledom
As far as I am aware, there is nothing you can do about it (unless you get a better keyboard). It's the hardware. Google 'Keyboard Ghosting' and you find your answer. ;)
 
J

JarodTheGreat

Guest
niko_argento said:
i think i quit :( it doesn´t work putting if moveburst = false { global.walkingspeed = 3 },the A+W combination does not work,why just that one?
Click to expand...
Are you still pressing space while holding A+W? If so that's not what is intended. Youre suppose to tap space, and then hold A+W. Its not working cause you're probably holding down Space along with A+W.
 
J

JarodTheGreat

Guest
It might be the way you're programming it into your game too. If need be I will give you the .gmz file I built. I tested it thoroughly, and everything on my end works perfectly.
 
Weird Dragon

Weird Dragon

Wizard
GMC Elder
@niko_argento, if your keyboard has ghosting issues with those 3 keys A+W+Space, then that issue will be there no matter what sequence you press or tap the keys. When all 3 keys are pressed or tapped at the same time you have the problem.

You can read this: How to tell if your keyboard configuration suffers from ghosting

Check out your keyboard on this page: Keyboard Ghosting Explained! where it says "Click To Use" on top of the page.

For your game I suggest that you keep your original code and then use key-mapping. Look in the manual: keyboard_set_map

***

@JarodTheGreat, it is great that you are doing a lot to help on this matter, but it really does seem to be a keyboard-ghosting problem that isn't easy to cope with.
 
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