forked from 1b-agent/opencadstudio-upstream
Hakan Seven
4fd9b98da4
Share source buffers across block placements and render nested content with GPU instance transforms.\n\nChunk silhouettes and compact mesh material data so large drawings stay under device buffer limits and remain responsive.
60 lines
1.6 KiB
WebGPU Shading Language
60 lines
1.6 KiB
WebGPU Shading Language
struct Uniforms {
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viewport_size: vec2<f32>,
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world_per_pixel: f32,
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lwdisplay_enable: f32,
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flat_shade: f32,
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transparency_enable: f32,
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_pad: vec2<f32>,
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view_rot: mat4x4<f32>,
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eye_high: vec3<f32>,
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_pad_eh: f32,
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eye_low: vec3<f32>,
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_pad_el: f32,
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}
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@group(0) @binding(0) var<uniform> u: Uniforms;
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@group(1) @binding(0) var atlas_tex: texture_2d<f32>;
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@group(1) @binding(1) var atlas_samp: sampler;
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struct VertIn {
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@location(0) pos: vec3<f32>,
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@location(1) pos_low: vec3<f32>,
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@location(2) uv: vec2<f32>,
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@location(3) color: vec4<f32>,
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@location(4) source_depth: f32,
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@location(5) translation: vec3<f32>,
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@location(6) translation_low: vec3<f32>,
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@location(7) instance_depth: f32,
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}
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struct VertOut {
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@builtin(position) clip_pos: vec4<f32>,
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@location(0) uv: vec2<f32>,
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@location(1) color: vec4<f32>,
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}
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const DRAW_ORDER_BIAS: f32 = 0.001;
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@vertex
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fn vs_main(v: VertIn) -> VertOut {
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var out: VertOut;
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let rel = (v.pos + v.translation - u.eye_high)
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+ (v.pos_low + v.translation_low - u.eye_low);
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out.clip_pos = u.view_rot * vec4<f32>(rel, 1.0);
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out.clip_pos.z = out.clip_pos.z
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- (v.source_depth + v.instance_depth) * DRAW_ORDER_BIAS * out.clip_pos.w;
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out.uv = v.uv;
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out.color = v.color;
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return out;
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}
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@fragment
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fn fs_main(in: VertOut) -> @location(0) vec4<f32> {
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let sd = textureSample(atlas_tex, atlas_samp, in.uv).r;
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let aa = max(fwidth(sd), 1e-4);
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let alpha = smoothstep(0.5 - aa, 0.5 + aa, sd);
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if alpha <= 0.0 {
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discard;
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}
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return vec4<f32>(in.color.rgb, in.color.a * alpha);
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}
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