TaSTT.git/Shaders, branch master

Delete unused files

2025-07-24T05:53:08+00:00

Fix font rendering ddx/ddy logic

2024-01-09T02:59:21+00:00

Various shader cleanup

2023-08-21T23:30:13+00:00

* remove unused variables, functions, keywords * rename fixedN to floatN * move min/max raymarch distance to top of ray_march.cginc * fix frame emission

Workaround: use STT mesh to write depth buffer

2023-08-13T01:55:50+00:00

There's some bug around using the raymarched world position to write the depth buffer. I wasn't able to find it quickly, so for now, use the original world position to write the depth buffer.

Improve numerical stability in raymarcher

2023-08-13T00:51:45+00:00

Increase units by a factor of 100 to avoid running into numerical instability on 32-bit floats. This comes at zero measured performance cost. This makes a visible difference in quality. Other minor changes: * Raymarching loop tries to get up to 4x closer than MINIMUM_HIT_DISTANCE before bailing out. This comes at no measured performance cost. * Convert `fixed` types to `float` in STT_text.cginc.

Bugfix: Shader no shows text mirrored

2023-08-12T22:45:59+00:00

Bugfix: ellipsis waits for board

2023-08-12T21:26:58+00:00

Regression created while optimizing shader. Performance still around 730 microseconds on my computer with this change.

Optimize skew-pyramid frame SDF

2023-08-12T21:09:48+00:00

Use symmetry to reduce # of distance calculations by 50%. Because the pyramid can be skewed, we can't reduce this by another factor of 2.

Small raymarching optimizations

2023-08-12T02:24:56+00:00

Using PIX to quantify changes, reduce raymarcher runtime from ~1.0 ms to ~850 us. In order of impact: * Tighten raymarch min/max distances * Make `in_mirror` check truly branchless * Gate ellipsis animation with non-divergent if statement Everything else is < 10 microseconds of improvement.

Add animated ellipsis to shader

2023-08-11T17:40:05+00:00

Not yet done: * Animator toggle * OSC integration