arrow keys

[screen_name]

Stefan, why don't you add keycodes for the arrow keys. Because the keydowns(0..3) just check for the specified key (so if they change it to j,k,l,o, then it will check those if i use keydown(0..3)

[Com013]

I doubt Stefan added the keycodes...they are those used by the BIOS/Windows. Just look in some table for the keycodes for the arrow keys.
Here, I found those in the header file of a DOS game programming library (Allegro):

NPC Code:

---

#define KEY_LEFT              82

#define KEY_RIGHT             83

#define KEY_UP                84

#define KEY_DOWN              85

---

I didn't test them though.

[Com013]

Ok, they were wrong. I needed to write a windows program to get the right ones. Here they are:
up - 38
left - 37
down - 40
right - 39
Graal isn't triggering a keypressed event though. You need to check it in timeouts.

[R0bin]

that isnt standard ASCII code though, so it wouldnt do anything with keydown2

[Kaimetsu]

I've had arrow keys work with keydown2 before.

[R0bin]

bah :P never worked for me

[Com013]

Originally posted by R0bin
that isnt standard ASCII code though, so it wouldnt do anything with keydown2

Huh? Something like this worked for me:

NPC Code:

---

if (playerenters) {

  timeout = 0.05;

}

if (timeout) {

  if (keydown2(38,true)) message Up;

  if (keydown2(37,true)) message Left;

  if (keydown2(40,true)) message Down;

  if (keydown2(39,true)) message Right;

  timeout = 0.05;

}

---

[CheeToS2]

Originally posted by Kaimetsu
I've had arrow keys work with keydown2 before.

along with keypressed, though?

[Kaimetsu]

Originally posted by CheeToS2


along with keypressed, though?

Maybe. Maybe not. Does it matter?

[CheeToS2]

Originally posted by Kaimetsu


Maybe. Maybe not. Does it matter?

yes, it does, since that is part of the point of this thread! (in regards to Com's post)

[Loriel]

Originally posted by R0bin
that isnt standard ASCII code though, so it wouldnt do anything with keydown2

We are talking about keycodes here, which is keyboard input as far as I know. ASCII is something with fonts or whatever.

[Kaimetsu]

Originally posted by CheeToS2


yes, it does, since that is part of the point of this thread! (in regards to Com's post)

But there's nothing you can do with keypressed that you can't do with keydown2 and a timeout loop.

[Jeff]

Kai:

That is true, however, as I understand it keypressed is far more efficient.

[Kaimetsu]

Originally posted by Jeff
Kai:

That is true, however, as I understand it keypressed is far more efficient.

I'd hardly say 'far' more efficient. None of us really know how Graal's internal workings are organised. I could argue that the use of event flags like keypressed takes more cpu time because it requires Graal to search the flag list, for example, but either way the difference in efficiency is going to be negligible.

[adam]

Originally posted by Kaimetsu


I'd hardly say 'far' more efficient. None of us really know how Graal's internal workings are organised. I could argue that the use of event flags like keypressed takes more cpu time because it requires Graal to search the flag list, for example, but either way the difference in efficiency is going to be negligible.

I think it totally depends on the situation...

If you already need to use a timeout loop for something else... just add the key checks to it...


If you don't have any timeouts... don't bother with one. Just use keypressed...