Hi guys! I'm creating a game in ice but haven't been able to figure out how to create transparent sprites and export them to my calc yet. Could someone help me out please?
I'd recommend checking out the convimg documentation.
Basically, you'll want to pick one color to use as the background that should be replaced with transparency - I like either hot pink or green, whichever is less likely to appear in my sprites.
Then, you need to create a fixed color palette entry to use for this color - generally, you can use the index 0 for this.
If you're using an index besides 0, you need to run SetTransparentColor for that color.

Here's an example convimg.yaml file - just run convimg in the same directory as this file, and it will produce ice.txt with the hex codes for the sprite.
Assuming that your background is #00ff00 (max green):

Code:
output: ice
  palettes:
    - palette
  converts:
    - sprites

palette: palette
  fixed-entries:
    - color: {index: 0, r: 0, g: 255, b: 0}
  images: automatic

convert: sprites
  palette: palette
  transparent-color-index: 0
  images:
    - (your sprites)


EDIT: the syntax in the example was slightly outdated - I updated it
Thank you! The ice documentation was outdated, so I was a bit confused Smile

EDIT: can I create transparent sprites using the setTransparentColor command and the sprite creator on calc? And also, does setTransparentColor use xlibc colors or hex colors? And another question Razz how can I get sprites to be in an appvar and use them later?
This code is assuming that you're using a custom palette, which you probably should be doing unless you're doing all of the graphics on-calc.
If you still want to use the xlibc palette, just use setTransparentColor with the xlib color of the color that you want to be transparent.

You can use convimg to produce a sprites appvar - here's an example convimg.yaml for a custom palette:

Code:
palettes:
  - name: global_palette
    fixed-entries:
      - color: {index: 0, r: 255, g: 255, b: 255}
    images: automatic

converts:
  - name: sprites
    palette: global_palette
    images:
      - (your images)

outputs:
  - type: appvar
    name: vargfx
    source-format: ice
    palettes:
      - global_palette
    converts:
      - sprites

And here's one that uses xlibc:

Code:
converts:
  - name: sprites
    palette: xlibc
    images:
      - (your images)

outputs:
  - type: appvar
    name: vargfx
    source-format: ice
    converts:
      - sprites

Unfortunately, there's not really an easy way to get sprites out of the appvar using ICE, since the offsets of the sprites are not available:
Quote:
<commandz> should source-format: ice for an appvar convert produce additional output besides the 8xv?
<MateoC> PT_ still hasn't told me what it should do; so it does the same thing as the "none" option right now
<commandz> wonderful
<commandz> maybe just a TXT with offsets? idk
<MateoC> idk :P
<MateoC> don't want to add anything and then have to change it
Oh thanks! Iíll just make them with my computer then Very Happy
  
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