Waterfall in the Railgun_Arena is no longer appearing

[holland01]

In addition to a few other items which should be shown. It seems like this is mostly due to some texture coordinate samples and any combination of these possible issues:

• Shaders which rely on a tcmod function may not be incorporating their calculations properly with respect to the texture atlas. (most likely)
• Something is very, very wrong with the current relationship between the bezier patches and how their corresponding indices are written to/read from during a draw call.
  • If the above is the case, then it's only the case for bezier patches which meet certain properties, as the curved columns/platforms in the Railgun_Arena map render just as they should. This does sound interestingly familiar, however, to a past issue which had similar problems...
• Something's wrong with the sampling from the sine table (also related to the tcmod), which occurs on the vertex deformation. (least likely)

It would be good to start with the tex coord modification functions in the effect shaders and consider what could be causing the disappearance.

[holland01]

What's interesting is now the waterfall mesh is being rendered as it should, however it's not actually scrolling.

Some things to continue looking at:

• Check the generated emscripten code and see if the proper scroll values are set when the effect shader file is being read.
• Look at the emscripten SDL_GetTicks function and make sure it's not stubbed out or something (unlikely, but still worth checking)
• Make sure we're actually reading properly from the sine table.
• See if anything in particular is causing the scroll values to be zero'd out in the shader.

As an aside, the blending isn't rendering as it should be either. Definitely make sure the proper blend values are being used - they may have been reset while debugging previously or something.

[holland01]

Fixed