Bars using height

[Fallen]

well, i'm trying to do a custom HUD, but i have a problem:
instead of using the normal bar, (horizontal), i'm trying to do a vertical bar, but i'm having serius troubles when the bar has to update.
i know how to do it horizontal:

def draw_hp(actor, x, y)
back_image = RPG::Cache.picture("HP_Back")
cw = back_image.width
ch = back_image.height
src_rect = Rect.new(0, 0, cw, ch)
self.contents.blt(x + 65, y - ch + 30, back_image, src_rect)
image = RPG::Cache.picture("HP_Meter")
cw = image.width * actor.hp / actor.maxhp
ch = image.height
src_rect = Rect.new(0, 0, cw, ch)
self.contents.blt(x + 65, y - ch + 30, image, src_rect)
end

that would make a normal bar, which draws horizontally, but i need it to be vertical,
i don't know if i explain myself...
hope i do...can anyone help me please?

 

[Fallen]

bump...

 

[Mac]

Post the full script and i'll see what i can do....and by reading what you've put you want the bar to go from up to down rather then left to right. Right?

 

[Fallen]

yeah...and thats bassically the def for the method, the one up there is in window_Base
so in anothr window i use:
draw_hp(@actor, 100, 100)
there's no "whole script" since it's added to window_base

 

[Sheol]

Try this:

 def draw_hp(actor, x, y)
back_image = RPG::Cache.picture("HP_Back")
cw = back_image.width
ch = back_image.height
src_rect = Rect.new(0, 0, cw, ch)
self.contents.blt(x + 65, y - ch + 30, back_image, src_rect)
image = RPG::Cache.picture("HP_Meter")
cw = image.width
ch = image.height * actor.hp / actor.maxhp
src_rect = Rect.new(0, 0, cw, ch)
self.contents.blt(x + 65, y - ch + 30, image, src_rect)
end

 

[Fallen]

i thought about that too, but when i decrese HP, the bar, instead of being replaced by the other bar, changes the Y position.
...hmm...that sound weird...
well, the empty bar goes behind the full bar, and when HP is reduced, instead of showing a proportional part of the empty bar, the full bar changes Y possition, and goes down and down and down...it's pretty weird...but can't seem to fix it.

 

[Sheol]

mmm... try this:

def draw_hp(actor, x, y)
  back_image = RPG::Cache.picture("HP_Back")
  cw = back_image.width
  ch = back_image.height
  src_rect = Rect.new(0, 0, cw, ch)
  self.contents.blt(x + 65, y - ch + 30, back_image, src_rect)
  image = RPG::Cache.picture("HP_Meter")
  cw = image.width
  ch = image.height
  h = ch * actor.hp / actor.maxhp
  src_rect = Rect.new(0, 0, cw, h)
  self.contents.blt(x + 65, y - ch + 30, image, src_rect)
end

At least... it should fix the Y problem.

 

[Fallen]

yep, that's working fine noew, but the problem is that HP is drowned upwards, and i need it to be from top to bottom...what can i do?

 

[Sheol]

Ok... try this:

def draw_hp(actor, x, y)
  back_image = RPG::Cache.picture("HP_Back")
  cw = back_image.width
  ch = back_image.height
  src_rect = Rect.new(0, 0, cw, ch)
  self.contents.blt(x + 65, y - ch + 30, back_image, src_rect)
  image = RPG::Cache.picture("HP_Meter")
  cw = image.width
  ch = image.height
  h = ch * actor.hp / actor.maxhp
  src_rect = Rect.new(0, 0, cw, h)
  self.contents.blt(x + 65, y + 30 - h, image, src_rect)
end

 

[Fallen]

lol...again the Y possition of the top bar is changing... =( i really can't find the answer...thanks anyways for trying so hard XD

 

[Sheol]

I have tried the last two codes, and they work fine...
Can you explain me the problem?

 

[Fallen]

images tell more than 100 words ;D

this is the bar at 100%
http://i21.photobucket.com/albums/b295/ ... bar100.png[/IMG]

and this one is when i have like 80% hp
http://i21.photobucket.com/albums/b295/ ... rMinus.png[/IMG]

hmm...thats the problem...and well...that's what i meant when i said the Y possition of the bar changed.

P.S: now that i typed "%" i just remembered i never understood what "%" does in RGSS, can you tell me please? =D

 

[Sheol]

This should work:

def draw_hp(actor, x, y)
  back_image = RPG::Cache.picture("HP_Back")
  cw = back_image.width
  ch = back_image.height
  src_rect = Rect.new(0, 0, cw, ch)
  self.contents.blt(x + 65, y - ch + 30, back_image, src_rect)
  image = RPG::Cache.picture("HP_Meter")
  cw = image.width
  ch = image.height
  h = ch * actor.hp / actor.maxhp
  src_rect = Rect.new(0, ch - h, cw, h)
  self.contents.blt(x + 65, y + 30 - h, image, src_rect)
end

And % is modulo, it returns the remainder of a division:

print 5 % 2  # 1
print 11 % 3  # 2
print 4 % 2  # 0

 

[Fallen]

yay!!! it's finally working! thanks! gracias man!!!!

BTW...can you tell me what was the problem, so i can learn?
and another thing: why do you use modulo? i mean...whats the useful thing about it... =S

 

[Sheol]

Sorry if you don't understand me.... I suck explaining :p
The problem was here:

cw = image.width
  ch = image.height
  h = ch * actor.hp / actor.maxhp
  src_rect = Rect.new(0, ch - h, cw, h)
  self.contents.blt(x + 65, y + 30 - h, image, src_rect)

ch stores the total height of the image, and h the needed height to draw the bar based on the HP.

So, I just change replace the old Y formula (y - ch + 30), to this new one:

y + 30 - h   # same as  y - ch + 30 + (ch - h)

ch - h is just draw it from the top, based on the max and min height.
And that works... but to make it works better, you should also change the image rectangle:

src_rect = Rect.new(0, ch - h, cw, h)

just by changing the "start y" from 0 to "max height - min height".

I hope... you got something :s


You can easily see if a number is divisible by other:

if number % 2 == 0

or limit a variable to a certain value:

variable = 0
loop do
  variable += 1
  variable %= 10
  break if variable > 10
end
# never will get here

 

[Fallen]

ok i got it, and got the modulo thing too, thanks a bunch =D