allow multiple attributes per style-spec property #6262
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mourner
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Mar 2, 2018
| this.type = type; | ||
| this.statistics = { max: -Infinity }; | ||
| } | ||
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| defines() { | ||
| return [`#define HAS_UNIFORM_u_${this.name}`]; | ||
| return this.names.map((name) => { return `#define HAS_UNIFORM_u_${name}`; }); |
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Nit: you can omit braces and return here.
| } else { | ||
| gl.uniform1f(program.uniforms[`u_${name}`], value); | ||
| } | ||
| }); |
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Nit: let's avoid using forEach and closures in favor of a for .. of loop.
| components: type === 'color' ? 2 : 1, | ||
| offset: 0 | ||
| }; | ||
| }); |
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Nit: you can omit braces and return here too if you surround the object with (...).
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This refactor is necessary for #2732 because
*-patternproperties are cross-faded and require more data to be passed to the shaders – the x,y coordinates of the top-left and bottom-right corners of up to four icons in an image_atlas, and the pixel ratio of the atlas – that can be packed in onevec4attribute.I added a function that takes a
propertyandtypeand returns thePaintVertexArrayconstructor for the layout needed for that property/type/expression type. This is where we will be able to add exceptions to the default paint vertex array layouts for properties with multiple attributes.I haven't settled on a good way to extend the
populatePaintArraysfunctionality to accommodate special cases yet, but it might make sense to work that out in the follow up PR implementingline-patternproperty functions.Launch Checklist