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.
72 lines
2.7 KiB
WebGPU Shading Language
72 lines
2.7 KiB
WebGPU Shading Language
// Textured-quad shader for raster images (RasterImage entity).
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// Renders a four-vertex quad (two triangles) with a sampled texture.
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// ── Bind group 0: shared projection uniforms ─────────────────────────────────
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// Must match the shared `Uniforms` struct (scene::pipeline::uniforms, 112 B).
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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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// Relative-to-eye (double-single): see wire.wgsl.
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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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// ── Bind group 1: per-image texture + sampler ────────────────────────────────
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@group(1) @binding(0) var img_texture: texture_2d<f32>;
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@group(1) @binding(1) var img_sampler: sampler;
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// Per-image params (fade, clip flag, etc.)
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struct ImageParams {
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opacity: f32,
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draw_depth: f32, // signed (-1,1) draw-order bias; 0 = neutral
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_pad1: f32,
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_pad2: f32,
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};
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@group(1) @binding(2) var<uniform> img_params: ImageParams;
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// Draw-order depth bias (see wire.wgsl).
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const DRAW_ORDER_BIAS: f32 = 0.001;
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// ── Vertex stage ──────────────────────────────────────────────────────────────
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struct VertIn {
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@location(0) pos: vec3<f32>,
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@location(1) uv: vec2<f32>,
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@location(2) pos_low: vec3<f32>,
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@location(3) translation: vec3<f32>,
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@location(4) translation_low: vec3<f32>,
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@location(5) draw_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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};
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@vertex
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fn vs_main(in: VertIn) -> VertOut {
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var out: VertOut;
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let rel = (in.pos + in.translation - u.eye_high)
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+ (in.pos_low + in.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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- (img_params.draw_depth + in.draw_depth) * DRAW_ORDER_BIAS * out.clip_pos.w;
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out.uv = in.uv;
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return out;
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}
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// ── Fragment stage ────────────────────────────────────────────────────────────
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@fragment
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fn fs_main(in: VertOut) -> @location(0) vec4<f32> {
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let col = textureSample(img_texture, img_sampler, in.uv);
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return vec4<f32>(col.rgb, col.a * img_params.opacity);
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}
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