Port dots styles to use texture

[bcamper]

We can simplify and improve performance of the dots-based styles by making them sample from a dot texture (that can be further modified in the shader as needed).

[patriciogonzalezvivo]

Porting to uniforms 9898573#diff-2ae5458fe5491a29a9703b5a93751300R1131

@bcamper What about PATTERN_SCALE and DOT_SIZE is ok to add uniforms for those?

[patriciogonzalezvivo]

Mmmm... I just notice that all those dots have white [1.,1.,1.] as background... is ok @sensescape if I hard code that and use remaining uniform space for DOT_SIZE and PATTERN_SCALE cc @bcamper

[patriciogonzalezvivo]

• Assuming background is always white a1b463a

• DOT_SIZE and PATTERN_SCALE are now uniforms

Next step making the texture! @bcamper I have two ways to go here:

• make a ONE SDF texture of a dot and then use aastep to clamp it according DOT_SIZE (u_dot_size)
• make TWO B/W textures with to dots of two different sizes for .25 (https://github.com/tangrams/refill-style/blob/turbo_dots/refill-style.yaml#L1146) and .125

Seams the first one is slightly more expensive but more reusable. Also I would love to use some blocks for this... are we ok for adding tangram-blocks?? cc @nvkelso @bcamper

[bcamper]

It might be worth trying both approaches to see what the performance/size difference is. Maybe start with a single dot.

But I'd like all the dependencies for refill in the project itself -- it's been difficult for me to deal with all the imports in Tron (though it was a good experiment), and I'm not yet convinced we want to bring that complexity to other house styles, so I'd rather keep it as an embedded style in here for now.

[patriciogonzalezvivo]

👍

[bcamper]

In general, performance is more important for these house styles than flexibility. Since a second dot texture probably won't add much size, I would likely prefer that (let's check the size?).

You can also make a generic version for Blocks, with a single texture, and keep an optimized version in this file.

[patriciogonzalezvivo]

Cool... @sensescape could you confirmam that the DOT_SIZE in the gh_pages version is what you want? Once we switch to textures will be harder to tweak

[sensescape]

@patriciogonzalezvivo ok! reviewing the dot sizes

[patriciogonzalezvivo]

thanks!

[patriciogonzalezvivo]

sooo... I tried with fixed size dot textures... and seams they don't scale right... so I'm taking the other approach: ONE SDF TO RULE THEM ALL!

[sensescape]

sorry about this mess, so many dots! looks like I'm using them all
park-dots1 mixes dots — DOT_SIZE: .1
dots-rev mixes pattern-dots
tiny-dots mixes dots3 — DOT_SIZE: .125
medium-dots mixes dots-medium —DOT_SIZE: .25

[patriciogonzalezvivo]

@sensescape THANKS! I hope you don't mind I simplify the names in this commit a1b463a some stiles where only call by just another style

[sensescape]

yes, please @patriciogonzalezvivo
the names were confusing me, i was mixing all the dots up, didn't make much sense! thanks!

[patriciogonzalezvivo]

All changes are here #33 ready for review and merge : )