Atlas and Sprite concept

[AdamStrangeParticipant]

Right. Using my Blitzmax core system I developed for this here is a concept for how it could work here:

Atlas extends image and has xsize and ysize. this basically gives an image basic minimum segments to work with. Assuming 8×8 was the minimum you could have sprites of any size conforming to 8, say 16×8 alongside 8×16, etc

Sprite takes an Atlas, start x,y segment, and size x,y segment.

E.G.

Atlas1 =  “blah.png”, 8,8

Sprite1 =  Atlas1, 0,0, 2,2

would be using Atlas1, starting at 0,0 with a with of 16 (2×8) and height of 16 (2×8)

Sprite2 =  Atlas1, 2,0,1,1

would be using Atlas1, starting at 16 (2×8),0 with a with of 8 (1×8) and height of 8 (1×8)

in use instead of drawimage, it would be drawsprite

The coding is very simple as I have it all here in OpenGL for Max and it just needs to be converted to monkey2 – which is openGL too!

It would also mean I can integrate both directly into ted21 editor

Thoughts?

[Gerry QuinnParticipant]

I’ve done something like this in the past with spritesheet images – but I just used a point to define the sprite, knowing what the basic size of the image and its sprites is.

I think a sprite atlas as such should probably be a real atlas, with arbitrary packed images.

This design might suit some users, especially for a tile-based game – but it is a very specific approach, and might be best done ad hoc for such a game.

[AdamStrangeParticipant]

Yep agreed, That’s exactly what I was proposing. Each sprite in the atlas can be a unique size

[Author]

Posts