Optimal texture size and tiling techniques

RagnarUlricson · November 18, 2015, 9:12pm

The game I’m working on uses sprites as foregrounds and background. (A 2d platformer)
At the moment, the backgrounds are drawn in photoshop and then tiled in single png’s or jpg’s of 768x768 size - and then packed into TexturePacker tilesets, which are then loaded by the engine when the room is loaded.

Now, I’m wondering if this is even necessary, to split graphics into these tiles, or does OpenFL handle stuff like that on its own in the background and it would make no difference if I just used one gigantic background and foreground bitmap (we’re talking about dimensions of around 6-7k x 2-4k textures here)?

Because with this tiling-engine, I find it hard to avoid seams and at the junction of two tiles, I can see the textures “wobble” - probably because of rounding-errors in the bitmap placement engine.

Well - I’m just wondering if there’s someone who can help me find the optimal way to handle this in OpenFL.
: )

loudo · November 18, 2015, 10:29pm

Hope this help you :

http://forums.tigsource.com/index.php?topic=37869.msg1196336#msg1196336

gist.github.com

https://gist.github.com/loudoweb/be0bd62984c804a55ca7

FixTile.hx

package;
/**
 * Avoid holes or border artifacts between tiles.
 * Sometimes the scale by 1.01 trick doesn't work, a greater value should be used. This method finds the correct value for you.
 * If you use openfl_legacy, pack your atlas using reduceBorderArtifact option in TexturePacker. There is no need to use this option on openfl_next.
 * You should update the scale of your tiles if your resize the screen during the game to always have the best scale value.
 * @author loudo
 */
class FixTile
{

This file has been truncated. show original

Also, you should avoid using textures bigger than 4096x4096 to support maximum hardwares.

RagnarUlricson · November 19, 2015, 1:47am

Very helpful. Perfect answer, thank you very much.