Probably a stupid question.

[Raot]

I'm trying to make a health bar. But my tiny monkey brain can't seam to make it shrink.

So, i have no previous knowledge of any kind of programing language except a week or so of Gamesalad(i made a game, but then realized i had pay 90 bucks for a profile or something if i wanted it tested. I decided to drop it for a more open source option.) and i read the first ten or so pages of "C++ for dummies" so far. I'm hoping to get more into it with time.

Anyway, i set it so that when "human"(my player) collides with "enemy1" then, script editor,

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healthbar.width=healthbar.width-50;

Like most program i write, it didn't work. The health bar stayed the same size. i wondered what the problem was, so i just just went to my healthbar and said that when i press tab,

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width=width-50;

didn't work either. It's probably some really simple thing I'm missing, but i couldn't find the answer on the forums. At least, not an answer i could comprehend.

[skydereign]

Okay, first off width is what we call a read only variable. You can't edit it like you were trying to, it contains the width of the current frame. If you want to do a health bar, you need to either have an animation of an hp bar filling, or use some canvas method. Here are two examples, the animation one is easier coding wise, but you can do a lot of cool stuff with canvas (though it doesn't sound like you want that).

For using an animation, you might look here. Just look at the top example.
http://game-editor.com/HP_Bar

Here's a great example for using canavs.
http://game-editor.com/forum/viewtopic.php?f=6&t=5756

[Raot]

Alright, i got an animation(well, i'm working on the same animation problem i had before actually.) but now, i've declared "Health" as a global variable, and as an integer, went to "health bar" and said, draw actor,

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health=anipos;

and got an error "undeclared identifier health"

[skydereign]

You need a variable health for this to work, also it should be animpos = health. There are several ways to make global variables, I would go to global code and add this to it.

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int health;

Also, just to make sure, it is animpos. Of course depending on your health bar that code won't work. This should always work.
healthBar -> Draw Actor -> Script Editor

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animpos=(health/nframes)*maxHP;

maxHP needs to be replaced with the maxHP, and you still need the health variable declared. Anyways, you might look up variables, they will be extremely helpful to you.

[Game A Gogo]

Sky, I think you mean

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animpos=(health/maxHP)*nframes;

Your way was converting animpos into the health value ...

maxHP should still be your max health. probably 100 in this case.

[Raot]

OK. So, my health bar has 11 frames. (full, 90%, 80%... 0%) so should i set the max HP to 11 or 10?

Also, I am pretty sure "Health" has been declared a variable now. However, i then set player->collision->enemy-> script editor,

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Health=Health-1;

All was fine, but it then gave me a message saying the "Health" had an error.

[Game A Gogo]

How did you declare your variable?

Also, the numbers of frames have nothing to do with maxHP. What is the maximum value you want Health to hold? that's what it is

[skydereign]

Oh yeah... oops. Was leaving for class so I wasn't paying too much attention. One thing to note is it is easier if you have your hp animation fill, rather than deplete. If you are having it fill, then you'll have to change the equation to this.

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animpos=(maxHP-hp)/maxHP*nframes;

[Raot]

I'm not quite sure how i declared it. i went to global code and there was a variable button, where i made a variable called "health".

However, whenever i then tried to use it later, it said "Undeclared identifier error"

So then i did what sky said and said,

int Health;

in the global editor and pressed add.

It proceeded to tell me that could not add it, because it already existed. This confused me, and prompted to to delete everything health related everywhere and try again.

Suddenly, after some exploration, i found, "Health" in "User vars" in the variable list. So i assumed something i did worked. thinking back now, it probably is not what i thought it was.

[Game A Gogo]

variables are case sensitive. If you declared "health", use health, not Health. Also you cannot declare a variable twice, so either delete the variable found in the variables dialog or the one found the global script code.