Extension for A_JumpifInventory

[Snarboo]

This is pretty simple. You can have an actor jump to another state based on the amount of an inventory item it has using A_JumpifInventory. However, it would be great if it was possible to have an actor jump when an inventory item was greater than or less than a certain value without having to define every value greater or less than that number.

Let me give you an example with the current syntax:

Code: Select all

ACTOR SomeObject
{
           States
           Spawn:
                     TNT1 A 0 A_JumpIfInventory("foo",< 3,"Foobar")
                     Loop
           Foobar: 
                     TNT1 A 1 A_Explode
                     Stop
          }
}

As it is now, if you want SomeObject to jump to the Foobar state when foo is below three, you have to put three or four seperate A_JumpIfInventory's in SomeObject's spawn state, while you would only need one if it could jump anytime it had less than three foos. Does that make sense?

Basically, if you wanted to tell an actor to jump when an inventory item is greater than a value, you would use a > symbol in front of the number, and if it's less than, you would use a < symbol.

[Graf Zahl]

This is pretty simple.

No, it's pretty messy.

[MDenham]

This is actually fairly simple; you just need another inventory item that's used solely for these kinds of checks, and ACS scripts to do the appropriate checks.

Implementing it directly is a mess, however.

[Graf Zahl]

Plus, what's the point? This is only a problem for people who can't write their code with inverted logic. Jumping if owning less than i is the same as not jumping when owning more than i-1.

[Snarboo]

This is actually fairly simple; you just need another inventory item that's used solely for these kinds of checks, and ACS scripts to do the appropriate checks.

I would actually like to see an example of this. Would you mind posting or PMing me with a quick example of how to do this?

[HotWax]

Code: Select all

ACTOR SomeObject
{
           States {
           Spawn:
                     TNT1 A 0
                     TNT1 A 1 A_JumpIfInventory("foo", 3, 1)
                     Goto Foobar
                     TNT1 A 0
                     Loop
           Foobar: 
                     TNT1 A 1 A_Explode
                     Stop
          }
}

Fixed. No new feature required.

[Cutmanmike]

That example will crash ZDoom though

[HotWax]

That example will crash ZDoom though

Haha! Fixed before you posted...

[Cutmanmike]

Next time... Next time...

[Zippy]

I know I posted a quick summary of doing all the standard logic operators with just >= somewhere...

Searching...

Even though DECORATE only gives you an >= check, all the other checks are possible with just that one (which is the reason why no more are needed.)

Code: Select all

x < y
  x >= y, goto No
  goto Yes

x > y
  x >= y+1, goto Yes
  goto No

x <= y
  x >= y+1, goto No
  goto Yes

x >= y
  x >= y, goto Yes
  goto No

x == y
  x >= y+1, goto No
  x >= y, goto Yes
  goto No

x != y
  x >= y+1, goto Yes
  x >= y, goto No
  goto Yes

[Snarboo]

Thanks guys. :)