[x3d-public] RenderedTexture support

[John Carlson]

Thanks Andreas.   My phone shutdown (battery perhaps) and now the example
won't show.

On Jan 15, 2018 5:41 PM, "Andreas Plesch" <andreasplesch at gmail.com> wrote:

> Dear group,
>
> x3dom has a RenderedTexture node which very useful. Prompted by a
> x3dom-user list question, I started to think about using
> RenderedTextures as faces for a ComposedCubeMapNode which is also
> available in x3dom albeit only for ImageTexture sources.
>
> Although I first thought it is technically difficult due to webgl
> limitations, after deep diving it turned out that there is a way to
> efficiently use gl textures (generated for RenderedTexture) as faces
> for gl cube map textures (using gl.copyTexImage2D()).
>
> So I am developing in my cubemap branch of x3dom the ability for
> ComposedCubeMapNode to use RenderedTexture which can be updated per
> frame, for dynamic mirror effects and probably other uses. Here is an
> example:
>
> https://rawgit.com/andreasplesch/x3dom/cubemap/test/regression-suite/test/
> cases/cubemap/colorcube.html
>
> It more or less works but before I go further I would like to know how
> other browser approach dynamic cube maps from a high level. There is
> also the x3d GeneratedCubeMapNode which is intended for this effect.
> So one question would be which players actually implement a
> GeneratedCubeMapNode.
>
> There are quite a few x3d browsers which have a RenderedTexture node.
> Do they allow using it with ComposedCubeMap ?
>
> A big question is how recursive mirror in mirror are handled.
>
> Is a RenderedTexture node a target for v.4 ?
>
> Any feedback much welcome,
>
> Andreas
>
> --
> Andreas Plesch
> Waltham, MA 02453
>
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