2022 June 12
* reworked Generated, Image and Composed to use GL 4+ cubemap texture
-- use as 'normal' texture, going through normal CPU side process
x (but GPU side needs work - still going through little cubemap frag shader, not ubershader)


2020 Apr 5
* fixed GeneratedCubeMap (save bstack->backgroundMatrix, do 6, restore)
- and earthRise_GP.x3d aka tilted backgrounds still work

2020 Apr 4
x something broke because nothing is working or I'm not sure if its working
x and I don't know which of these scenes ever worked
x and I don't know what they are supposed to look like
                            freewrl4/5   view3dscene instant
composedCub2.wrl               OK X                  swirl
cubemapfacebackground.wrl       X X2    X           X
GeneratedCubeMap.wrl            X3 X4     X6        X5
generatedcubmap_castle.wrl       x  x      X parsing
GneratedCubeMap_control.wrl     OK7 X8     X10        X9
GeneratedCubeMap_dynamic.wrl    OK X11      X13       X12
GeneratedCubeMap_multiple.wrl   OK X14
GeneratedCubeMap_teapot,wrl     OK X15      X16     X17 
icosphere.wrl - just an icosphere
icosphere.x3d 
ImageCubeMap_dds_earth.wrl      X X
ImageCubeMap_dds2.wrl           OK OK18
ImageCubeMap_earth.wrl          X X 
ImageCubeMap_png.wrl            OK OK18     X       X19
ImageCubeMap_web3dit.wrl        OK OK18
old/ImageCubeMap/ImageCubeMap.x3d OK OK   nada        texture not regenning


X2 bacground stitched together wrong 
X3 texture moving on a sphere
X4 weird stuttering ball in-place, background likely has problems too
X5 black ball, background looks right
X6 swirl ballk, background looks right

OK7 - the control is stopping and starting a texturing based on the rotating teometry
x8 - i see no change in texture, and this one has a a background
X9 - black teapot 
X10 v3dscene doesn't do javascript, teapot texture not dynamically updated either 

X11 teapot is reflecting a background, but not dynamically generating a texture 
X12 black teapot
x13 static teapot texture 

X14 texture not dynamically updated 
X15 stuttering background (vs no background for freewrl4)
X16 no texture update, teapot not shiny
X17 teapot not shiny, background OK 

OK18 great - beats freewrl4 by showing background
X19 static texture on sphere

Summary of scenes for testing:
- ImageCubeMap_png.wrl 
Q. should it have a background or not?
- if no, freewrl4 is right 
- if yes, freewrl work is right 
- it has a background node with the 4 textures, current freewrl 4.5 is correct, freewrl4 is wrong 
- GeneratedCubeMap_control.wrl - freewrl4 working, current 4.5 not. 

Git > revision checking for breakage > VolumeRendering_I > likely in texture_to_opengl function


/old/ImageCubeMap/ImageCubeMap.txt says: """
http://en.wikipedia.org/wiki/Cube_mapping
http://www.web3d.org/files/specifications/19775-1/V3.3/Part01/components/env_texture.html
there are 3 types of CubemapTexture nodes:
Composed - 6 url fields for front, back, top, left ...
Generated - inline values for the sides
Image - single url field - here they mention DDS as a possible format and give a link, but don't make it a requirement
"""

2016-09-13
http://www.nvidia.com/object/cube_map_ogl_tutorial.html
- the cm_ images taken from this page

Other browser aren't showing our cubemap stuff.
Closest: InstantReality which appears to be looking for a square texture that covers the sphere
- confirmed with _earth.wrl
A few appear to load .dds, but then we see swirls, and not sure why
H: channel/component confusion ie RGBA (I'm using RGB)
H: different assumption about cubemap layout 
- (but I used gimp dds, and confirmed with ati cubemapgen tool)