A way to determine the amount of subimages in an image-file?

Author

Message

Zwarteziel

13

Years of Service

User Offline

Joined: 22nd Jan 2011

Location: Netherlands

Posted: 9th Jan 2013 21:54

Link

Hi all,

I've been experimenting with the LoadSubImages-command, which is quite nice and straightforward. However, I've been wondering: is there a way to automatically determine the amount of subimages an image-file actually contains?

(Something along the lines of 'GetSubImageExist' or something?)

Back to top

Profile PM Email

kamac

13

Years of Service

User Offline

Joined: 30th Nov 2010

Location: Poland

Posted: 9th Jan 2013 21:58 Edited at: 9th Jan 2013 22:01

Link

Well, it's easy to write that.
Just open certain subimages file, and iterate through each line.

Here's an example function:

+ Code Snippet

function GetSubImagesCount(imagePath)
   if getFileExists(imagePath)
      fileHandle = OpenToRead(imagePath)
      lineCount = 0
      while fileEOF(fileHandle) = false
         ReadLine(fileHandle)
         lineCount = lineCount + 1
      endwhile
      return lineCount
   endif
   return 0
endfunction

Should work.

Follow me on twitter! @MotionStruct
Motion Struct blog

Back to top

Profile PM Email

Zwarteziel

13

Years of Service

User Offline

Joined: 22nd Jan 2011

Location: Netherlands

Posted: 9th Jan 2013 23:24

Link

Thanks kamac!

I thought that, since the subimages.txt-file contains a single string of info without line breaks, the fileEOF would give a wrong number. Here's the way I use it in AGK.

+ Code Snippet

function GetSubImageCount(File$)
    if getFileExists(File$)
        fileHandle = OpenToRead(File$)
        LineCount = 0
        while fileEOF(fileHandle) = 0
            ReadLine(fileHandle)
            LineCount = LineCount + 1
        endwhile
        LineCount = LineCount - 1 ` sets the count a back a tick  
    endif
endfunction LineCount

Once again, you have my gratitude!

Back to top

Profile PM Email

Marl

12

Years of Service

User Offline

Joined: 19th Nov 2011

Location: Bradford, UK

Posted: 11th Jan 2013 18:52

Link

Quote: "I thought that, since the subimages.txt-file contains a single string of info without line breaks, the fileEOF would give a wrong number."

This may be down to what you are using to create the subimages file.

As a standard text file it works fine with line breaks - such as with font subimages;

+ Code Snippet

32:0:0:41:85
33:41:0:32:85
34:73:0:38:85
35:111:0:42:85
36:153:0:42:85
37:195:0:63:85
38:258:0:55:85
39:313:0:29:85
40:342:0:36:85
41:378:0:36:85
42:414:0:37:85
43:451:0:42:85
44:493:0:30:85
45:523:0:33:85
46:556:0:30:85
etc.

I frequently use spare space in a font file for game graphics - either using subimages or directly using setSpriteAnimation/setSpriteFrame() or a little of both depending on placement.

Back to top

Profile PM Email

Sorry your browser is not supported!

AppGameKit Classic Chat / A way to determine the amount of subimages in an image-file?