Fangames > Programming Questions

Invincibility Frames

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lawatson:
Make a sprite for the health bar which is 1 pixel, and then draw it with the length of the maximum length / max HP * HP.

LoneTree_tv:
How do you change the length of the sprite?

lawatson:
image_xscale = x

it's multiplicative, so if you choose 1, it'll show the sprite, if you choose 2, it'll double the length, -1 will reverse the sprite, etc.

EDIT: Or actually, you'd probably rather just wanna put in the draw event:

draw_sprite_ext(spr_healthbar,0,x,y,image_xscale,1,0,c_white,1)

Replace the variables with whatever.

LoneTree_tv:
Alright, I tried using the draw event, which I've never used before, and ran into some problems

I only wrote this:

draw_sprite(HPBar,0,10,10)

and neither the sprite nor the boss appears.

also, just now, i tried

hpbar=draw_sprite(HPBar,0,10,10);
hpbar.image_xscale=500/20*hp

the boss and hp bar did not show, and the players sprite got stretched instead.

EDIT: Oops, didn't see your edit. Tried it, and it still didn't work. what should I put for the image scaling if the max hp is 20 and I want the length to be 500? I think the fact that I put "500/20*hp" is what screwed everything up.

EDIT2: Wow, I'm incredibly stupid. I replaced spr_healthbar with my sprite name, and that fixed it. But the boss still doesn't seem to want to exist. By that I mean it's invisible. It's still shootable if you can guess where he is.

EDIT3: Once again, I'm terrible. I just put in draw_self(); before the other line and everything worked perfectly.

lawatson:
Yeah, maybe I should have also said that you should put in draw_self() when using the draw event, but otherwise, there you go!

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