Problems/bugs with patch images

[Andrea Viarengo]

Hello Christian!!

How are you?
I'm return to working on my "autocubic" project, and I'm trying to use the new patch positioning and image manipulation methods.
I have met some little problems:

1) I have to make the images bigger of 2 pixel (width and height), otherwise I can see a space between consecutive patches (I have explained this problem to you before, do you remember?)

2) I would like to create a transparent hole (alpha=0) in a png image, I need this for doors and windows, so I have operated  in this manner:

img=pipmak.loadimage(texture.."/front.png")
w,h=img:size()
img:color(0,0,0,0)
img:fill(w/3,h/3,w/3,2*h/3)

but I get only a black shape and not a transparent hole: this is a bug?

If I create a new white image instead of load a png, it works correctly:

i mg=pipmak.newimage(200,200):color(1,1,1,1):fill()
w,h=img:size()
img:color(0,0,0,0)
img:fill(w/3,h/3,w/3,2*h/3)

3) Apart the holes which aren't transparent, I think there are some bugs in the image cache management, because I reload the image always before the patch statement, and if there is a door, I modify the image using fill(), and finally call patch():

img=pipmak.loadimage(texture.."/front.png")

if door~=0 then    --the value of door is recalculated every time
   w,h=img:size()
   img:color(0,0,0,1)
   img:fill(w/3,h/3,w/3,2*h/3)
end

p = patch {
       face = dir,
       w = dimx+fix,  -- fix=2: workaround
       h = dimx+fix,
       anchorv = w/2,
       anchorh = h/2,
       x=0,y=0,  --values aren't influent: I don't need to set these!!!
       ny      =0,
       nz = -2*l-1,
       nx = 2*(j-l),
       visible = true,
       image = img
}

Well, I can view doors also where they would not have to be there!!  ( i.e.: patch  statement use a wrong image get from the cache instead of reload from disk)
I believe that this bug is connected to the assertion failed in the project map visualization which I show you in my authoring feature.

I hope that this help you to fix bugs.

I have stopped my pipmak development activity, because I don't know what you have in mind and how you want to proceed.
I don't want create a parallel version of pipmak,  I think you have understood now what I'm able to do and what I am not, so, if you desires my help in developping, you should tell me exactly what you need (for example: "I need a function which get these inputs, return these outputs and do this thing").
In any case, I would be happy to help you, if only you tell me how.
 
Bye

Andrea

-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems?  Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >>  http://get.splunk.com/
_______________________________________________
Pipmak-Devel mailing list
Pipmak-Devel@...
news://news.gmane.org/gmane.games.devel.pipmak.devel
https://lists.sourceforge.net/lists/listinfo/pipmak-devel

[Christian Walther]

Andrea Viarengo wrote:
> 2) I would like to create a transparent hole (alpha=0) in a png image, I
> need this for doors and windows, so I have operated  in this manner:
>
> img=pipmak.loadimage(texture.."/front.png")
> w,h=img:size()
> img:color(0,0,0,0)
> img:fill(w/3,h/3,w/3,2*h/3)
>
> but I get only a black shape and not a transparent hole: this is a bug?

image:fill() doesn't add an alpha channel to an image that doesn't
already have one. Whether that's a bug or not is debatable, it's
certainly a limitation that needs to be documented at least. Fixing it
is probably going to be non-trivial. Depending on how we decide to solve
the loadimage-returns-existing-object problem, it may go away entirely.

Thanks for finding this!

  -Christian


-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
Pipmak-Devel mailing list
Pipmak-Devel@...
news://news.gmane.org/gmane.games.devel.pipmak.devel
https://lists.sourceforge.net/lists/listinfo/pipmak-devel