A shader program assembled at runtime from files listed in a JSON manifest
(shaders/shaders.json), rather than one hardcoded vertex/fragment path
pair. Each stage in the manifest is a list of GLSL files concatenated in
order, which is how common.glsl (the Materials/Lights structs and the
light/material/time/repeat uniforms) and noise3D.glsl (Ashima
Arts' snoise) get shared between the vertex and fragment stages without
copy-pasting them. load_shader_from_json() in main.py drives
ShaderLib's low-level per-stage API directly, since load_shader() only
takes a single file per stage.
The teapot is lit with a standard Phong pass, but its surface colour comes
from six octaves of 3D simplex noise summed together -- a fractal sum that
gives the gold material a mottled, marble-like look shifting continuously
as time advances.
w/s: wireframe / fillf/n: fullscreen / windowed1/2: decrease / increase the noise UV scale (repeat)- Left-drag : orbit, Right-drag : pan, Wheel : zoom
Esc: quit
main_webgpu.py reinterprets the JSON-driven shader assembly for WGSL's
shape: wgpu-py has no native "load a shader program from JSON" path (a
WGSL module is one source string with both vertex and fragment entry
points, unlike GLSL's separate compiled stages), so shaders_webgpu/shaders.json
lists WGSL fragment files that get concatenated into one module source
before device.create_shader_module -- same "assemble a shader from
JSON-declared files" lesson, applied to WebGPU's single-module shape. One
intentional smoothing: the OpenGL version's repeat uniform has a visible
jump on the first 1/2 keypress, an artefact of the C++ source setting
its initial value in two disconnected places; this version starts repeat
at 0.1 cleanly since there's no equivalent second initialisation site here.