On Sun, Jul 2, 2017 at 9:12 AM, J Decker <[email protected]> wrote: > > > On Sun, Jul 2, 2017 at 8:25 AM, Lars Hansen <[email protected]> wrote: > >> The TypedObjects proposal does this, for what it calls non-opaque types >> (you can define types and then map them onto an ArrayBuffer in various >> ways). I'm not 100% sure what the latest text is, I expect it is here: >> https://github.com/tschneidereit/typed-objects-explainer but it could >> also be here: https://github.com/nikomatsakis/typed-objects-explainer. >> >> > That's about a single structure; as is the thing Isiah suggested > (ref-struct) and not an array of packed structures such as would be used > for interleaved vertex data. >
No, the TypedObjects proposal allows for packed arrays of structures, without references. See https://github.com/tschneidereit/typed-objects-explainer/blob/master/core.md#struct-arrays . --lars > > >> TypedObjects is currently a stalled proposal. I expect it may be revived >> when WebAssembly integration into JS becomes a more seriously discussed >> topic. >> >> --lars >> >> On Sun, Jul 2, 2017 at 6:53 AM, J Decker <[email protected]> wrote: >> >>> >>> On Sun, Jul 2, 2017 at 6:50 AM, Isiah Meadows <[email protected]> >>> wrote: >>> >>>> I'm not sure this belongs in the spec. >>> >>> >>> Typed arrays are in the spec.... >>> http://www.ecma-international.org/ecma-262/6.0/#sec-typedarray-objects >>> >>> >>>> There exists a similar thing on >>>> npm [1] which deals with Buffers instead, but you could adapt it >>>> similarly to work with ArrayBuffers (via a DataView). In reality, this >>>> really only would have two uses: native C interop (in Node/etc.) and >>>> WebAssembly interop (which is better addressed by separate >>>> `foo_create` and `foo_destroy` exports with raw pointers and creating >>>> a JS wrapper to manage them more idiomatically). >>>> >>>> [1]: https://www.npmjs.com/package/ref-struct >>>> ----- >>>> >>>> Isiah Meadows >>>> [email protected] >>>> >>>> Looking for web consulting? Or a new website? >>>> Send me an email and we can get started. >>>> www.isiahmeadows.com >>>> >>>> >>>> On Sun, Jul 2, 2017 at 9:42 AM, J Decker <[email protected]> wrote: >>>> > >>>> > I would like to open a discussion to propose that an extension to >>>> > http://www.ecma-international.org/ecma-262/6.0/#sec-typedarr >>>> ay-objects >>>> > should be defined that would allow defintiion of interleaved typed >>>> data. >>>> > >>>> > Support for interleaved vertex data is one use... >>>> > >>>> > https://developer.apple.com/library/content/documentation/3D >>>> Drawing/Conceptual/OpenGLES_ProgrammingGuide/TechniquesforWo >>>> rkingwithVertexData/TechniquesforWorkingwithVertexData.html >>>> > section Use Interleaved Vertex Data >>>> > >>>> > >>>> > https://www.khronos.org/opengl/wiki/Vertex_Specification >>>> > Defines how OpenGL describes interleaved data. >>>> > >>>> > This could also be used to interop with native code as an array of >>>> packed >>>> > (C) structs. >>>> > >>>> > I don't really know what the definition mechanics might be, but for >>>> usage I >>>> > might like to see... >>>> > >>>> > var arr = new InterleavedTypeArray( [ { name: "fieldName", >>>> type:"uint32' }, >>>> > ... probably an array of objects defining the fields in an element ], >>>> > <element count> ); >>>> > >>>> > arr[x].fieldName = value. >>>> > >>>> > >>>> > >>>> > _______________________________________________ >>>> > es-discuss mailing list >>>> > [email protected] >>>> > https://mail.mozilla.org/listinfo/es-discuss >>>> > >>>> >>> >>> >>> _______________________________________________ >>> es-discuss mailing list >>> [email protected] >>> https://mail.mozilla.org/listinfo/es-discuss >>> >>> >> > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > >
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