Topic: nearest neighbor / point filter

Are you referring to terrains?

For terrains it is not possible anymore to make two terrains NOT blur. For an explanation see this post of the corresponding PR.

In version 1.1 this was possible by changing the terrains dither_layer value: If two terrains had the same value for dither_layer they had hard edges. See Helpterrains for examples.

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Kusy wrote:

No, I'm talking about texture filtering / resampling in general, not about blending.

IMO this is only a problem (only actually visible) when upscaling, so the preferred solution is to provide high resolution images for all map objects in the game. I apologise for the slow progress of the blender re-exports...

from what I see Widelands uses bilinear filtering when zooming in to resample textures. Is it possible to switch to use nearest/point filter instead?

I don't think that would give good results, nearest point is usually extremely ugly... Unless you want to use only integer scales (I don't think widelands helps in that, except when going to the max zoom of 4x), where the blocky images may sometimes be preferable to the blurred ones...

Also, wouldn't clamping to edges resolve the hack with textures being sampled at 0.99 UV size for terrains?

Well, looks like you know quite a bit about OpenGL after all (compared to me anyway ) so you may try to do it and open a PR if you can get something nice out of it. Any help is welcome.

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Kusy wrote: Not having the option puts on hard limits on the art direction for addons.

Which by the way I know can be a valid choice if you're aiming for high level of consistency.

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And here are the used files (replace data/world/critters/{bunny,duck} with the contents of the zip)

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Ok. I'm semi-sure I found a way to change how the textures filter but I can't get around making a build (errors galore), never built an app in my life and this didn't work out to be the first time.

There are two instances of GL_LINEAR in the source. One is in texture.cc (widelands/src/graphic) and one in dither_program.cc (widelands/src/graphic/gl)

Changing parameters GL_LINEAR to GL_NEAREST in the first file or in both of them would likely do the trick.

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, static_cast<GLint>(GL_LINEAR));
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, static_cast<GLint>(GL_LINEAR));

I'll try to build this when I have the time to poke around later in the week unless someone who knows how to do it out of the box can confirm it works.

Again, having this as an option in the game (a checkbox for nearest filtering / a droplist with the two or something in that vein) would be invaluable both from the perspective of players who prefer how it looks and anyone who wants to work on addons with a more pixelart feel to them.

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