mirror of
https://github.com/storytold/effectcraft.git
synced 2026-10-26 11:07:54 -06:00
Brandon ThomasandClaude Opus 5.5
0c4e533460
render: three_d::adv::SplitRun (Renderer::split_adv_run) hands draw_run's split path to an accelerator as data (main scene, special layers far to near, 3D mattes drawn solo); Renderer::sky_draw / three_d::SkyDraw for Environment Light Background layers. gpu: the walk draws skies (adv_sky kernel), resolves each special layer, hides it behind the nearer main scene (occlude kernel) and composites it through the 2D path without readbacks. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
33 lines
1.4 KiB
WebGPU Shading Language
33 lines
1.4 KiB
WebGPU Shading Language
// Environment Light Background layers (`three_d::compose::draw_sky`): the layer's
|
||
// equirectangular image looked up by each pixel's view ray through the camera, composited over
|
||
// the canvas. src = the canvas, aux = the layer's buffer. f[0] = (forward, zoom); f[1] =
|
||
// (right, orthographic); f[2] = (down, environment rotation); f[3] = (x offset, y offset,
|
||
// 1 / scale, opacity) with the offsets ROI / scale − view size / 2; f[4] = (image width, height).
|
||
|
||
@compute @workgroup_size(16, 16)
|
||
fn adv_sky(@builtin(global_invocation_id) gid: vec3<u32>) {
|
||
let p = vec2<i32>(gid.xy);
|
||
let dims = out_dims();
|
||
if (p.x >= dims.x || p.y >= dims.y) {
|
||
return;
|
||
}
|
||
let fwd = P.f[0].xyz;
|
||
var dir = fwd;
|
||
if (P.f[1].w == 0.0) {
|
||
let cx = (f32(p.x) + 0.5) * P.f[3].z + P.f[3].x;
|
||
let cy = (f32(p.y) + 0.5) * P.f[3].z + P.f[3].y;
|
||
dir = normalize(fwd * P.f[0].w + P.f[1].xyz * cx + P.f[2].xyz * cy);
|
||
}
|
||
// shade::equirect_uv.
|
||
let pi = 3.141592653589793;
|
||
var u = 0.5 + (atan2(dir.x, dir.z) + P.f[2].w) / (2.0 * pi);
|
||
let v = acos(clamp(-dir.y, -1.0, 1.0)) / pi;
|
||
u = u - floor(u);
|
||
let iw = P.f[4].x;
|
||
let ih = P.f[4].y;
|
||
let s = sample_bilinear(aux, clamp(u * iw, 0.5, iw - 0.5), clamp(v * ih, 0.5, ih - 0.5));
|
||
let op = P.f[3].w;
|
||
let d = textureLoad(src, p, 0);
|
||
textureStore(out, p, s * op + d * (1.0 - s.w * op));
|
||
}
|