A pack's `fn material(input: MaterialInput) -> Surface` now gives the lit
colour of every terrain surface: sections and distant tiles, solid,
cutout and translucent, in both the instanced and the flat draws. Terrain
keeps Horizon's meshes, culling and draw lists; only its pipelines change.
Their shader is the pack's stage, a prefixed copy of terrain.wgsl's
terrain section, and entries that hand the pack the texture, the vertex
tint, the light levels and the lightmap's colour apart, then apply the
alpha test and fog as `fs_solid` and `fs_translucent` do.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A pack's `sky` function gets vanilla's colour along each view ray and draws
where the vanilla sky dome draws, under the sun, moon, stars and clouds. The
pipeline's shader is the pack's checked stage (`CheckedStage::source`, new)
followed by a copy of terrain.wgsl's sky with every name prefixed
`horizon_sky_`, so none can meet a pack's; terrain.wgsl's `fs_sky` now calls
`sky_along_ray`, the same code as before.
A running pack is one `NativePack`: the frame every stage reads (written once
a frame), its sky and post stages and its pass timer. In a frame F3 times, the
sky draws in a pass of its own so the overlay can show its time; otherwise it
stays in the world's pass.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The Mods page gets a fourth kind, Shader packs, which searches Horizon's
registry and installs a `.hshader` into `shaderpacks/` once
`index::check_file` has run the game's own `horizon_shader_api::check`.
Modrinth and CurseForge answer that tab with a pointer to the registry:
their shader packs are the shaders/ format and are not offered.
The sample index lists a shader pack (`glow`, made with
`horizon-shader new` and `pack`), so the registry build, check_file and
the launcher's install are tested on a real file. A file of the same
name the registry didn't put in place is no longer called a mod.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The page lists the packs in shaderpacks/: Horizon's own, marked (Horizon) and
named by their manifest, then packs in the shaders/ format. One runs at a
time: clicking a pack picks it, clicking the picked one turns it off, and
Open Pack Folder opens the folder. The pick is saved in horizon-graphics.txt
under a new key (pickedShaderPack), so the shaderPack value older versions
saved stays ignored. A new pick drops the running pack and loads the new one
in the next frame; HORIZON_SHADER_PACK still wins, for development.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
While the F3 overlay is open, the running pack's passes are timed on the GPU,
a shaders/ pack's or a native pack's, and the overlay lists the pack's total
and its costliest passes (the median of the last 15 timed frames). The timer
never waits: a timed frame's stamps are resolved once the GPU has finished it
and read back once mapped, then the next frame is timed. A native pack's first
pass counts from a mark that ends with the world's draws, so it does not carry
the time it waited for them. HORIZON_SHADER_PACK_TIMING still logs the medians.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A native pack named by HORIZON_SHADER_PACK (a folder with horizon-shaders.toml
or a .hshader in shaderpacks/) is checked, then its post passes run over the
world's own target, the one a shaders/ pack reads: no second target and no
extra pass, and without a pack the frame only tests one Option. The pack is
looked at twice a second; a saved file is checked and rebuilt in place, and a
version that fails is refused in the chat while the last good one keeps
drawing.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The SDK's tool, in horizon-shader-api: `horizon-shader new <dir> --template
post|sky|material` makes a pack that passes the check, `check <pack>...
[--json]` runs the check the game, the launcher and the registry run and
prints each stage's cost and the pack's SHA-256 or every problem at its
file:line:column, and `pack <dir>` checks then writes the reproducible
.hshader. Golden Hour, the example pack, warms the sky around a low sun and
adds a soft glow and a colour grade, with five options. docs/shaders.md is the
authors' guide.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Ludovic Marie