bherbruckandClaude Opus 5.5
1988594a13
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL
485 lines
19 KiB
Rust
485 lines
19 KiB
Rust
//! GPU viewport: shaded triangles and screen-space wide lines with a depth buffer, drawn in an
|
||
//! `egui_wgpu` paint callback. Geometry is uploaded when the scene changes; each frame only the
|
||
//! camera uniform changes.
|
||
|
||
use std::sync::{Arc, Mutex};
|
||
|
||
use egui_wgpu::wgpu;
|
||
use egui_wgpu::wgpu::util::DeviceExt;
|
||
|
||
/// Triangle vertex: position (3 × f32), normal (3 × f32), sRGB colour (4 × u8).
|
||
pub const TRI_SIZE: usize = 28;
|
||
/// Line instance: a, b (3 × f32 each), colour (4 × u8), width in pixels (f32).
|
||
pub const LINE_SIZE: usize = 32;
|
||
const UNIFORM_SIZE: u64 = 128;
|
||
|
||
/// CPU-side geometry waiting to be uploaded. The model scene changes with the design; the
|
||
/// highlight scene (hover, selection, the origin widget) changes often and is small.
|
||
#[derive(Default, Clone)]
|
||
pub struct GpuScene {
|
||
/// Opaque triangles. A zero normal draws the colour flat (unlit).
|
||
pub tris: Vec<u8>,
|
||
/// Translucent triangles (alpha from the colour), drawn after the opaque ones without
|
||
/// writing depth.
|
||
pub trans: Vec<u8>,
|
||
/// Depth-tested lines.
|
||
pub lines: Vec<u8>,
|
||
/// Lines drawn over everything (active sketch, highlights).
|
||
pub overlay: Vec<u8>,
|
||
/// Translucent triangles pushed slightly back in depth, so they only show where nothing
|
||
/// coincides with them (removed material in a preview).
|
||
pub ghost: Vec<u8>,
|
||
/// Translucent triangles drawn through everything (a cut's tool body).
|
||
pub xray: Vec<u8>,
|
||
/// Lines drawn first, under everything (the ground grid: the model hides it, it never
|
||
/// hides the model).
|
||
pub under: Vec<u8>,
|
||
}
|
||
|
||
impl GpuScene {
|
||
pub fn tri(&mut self, p: [f32; 3], n: [f32; 3], c: [u8; 4]) {
|
||
for v in p.iter().chain(&n) {
|
||
self.tris.extend_from_slice(&v.to_le_bytes());
|
||
}
|
||
self.tris.extend_from_slice(&c);
|
||
}
|
||
pub fn trans_tri(&mut self, p: [f32; 3], n: [f32; 3], c: [u8; 4]) {
|
||
for v in p.iter().chain(&n) {
|
||
self.trans.extend_from_slice(&v.to_le_bytes());
|
||
}
|
||
self.trans.extend_from_slice(&c);
|
||
}
|
||
pub fn ghost_tri(&mut self, p: [f32; 3], n: [f32; 3], c: [u8; 4]) {
|
||
for v in p.iter().chain(&n) {
|
||
self.ghost.extend_from_slice(&v.to_le_bytes());
|
||
}
|
||
self.ghost.extend_from_slice(&c);
|
||
}
|
||
pub fn xray_tri(&mut self, p: [f32; 3], n: [f32; 3], c: [u8; 4]) {
|
||
for v in p.iter().chain(&n) {
|
||
self.xray.extend_from_slice(&v.to_le_bytes());
|
||
}
|
||
self.xray.extend_from_slice(&c);
|
||
}
|
||
/// A line under everything (see [`GpuScene::under`]).
|
||
pub fn under_line(&mut self, a: [f32; 3], b: [f32; 3], c: [u8; 4], width: f32) {
|
||
for v in a.iter().chain(&b) {
|
||
self.under.extend_from_slice(&v.to_le_bytes());
|
||
}
|
||
self.under.extend_from_slice(&c);
|
||
self.under.extend_from_slice(&width.to_le_bytes());
|
||
}
|
||
pub fn line(&mut self, a: [f32; 3], b: [f32; 3], c: [u8; 4], width: f32, on_top: bool) {
|
||
let out = if on_top { &mut self.overlay } else { &mut self.lines };
|
||
for v in a.iter().chain(&b) {
|
||
out.extend_from_slice(&v.to_le_bytes());
|
||
}
|
||
out.extend_from_slice(&c);
|
||
out.extend_from_slice(&width.to_le_bytes());
|
||
}
|
||
}
|
||
|
||
pub type SceneSlot = Arc<Mutex<Option<GpuScene>>>;
|
||
|
||
/// Per-frame parameters.
|
||
pub struct ViewportCallback {
|
||
pub key: u64,
|
||
pub slot: SceneSlot,
|
||
/// The highlight scene and its key.
|
||
pub hl_key: u64,
|
||
pub hl_slot: SceneSlot,
|
||
/// The live preview scene and its key.
|
||
pub pv_key: u64,
|
||
pub pv_slot: SceneSlot,
|
||
/// Column-major view-projection.
|
||
pub view_proj: [[f32; 4]; 4],
|
||
/// Direction toward the eye (for lighting).
|
||
pub back: [f32; 3],
|
||
/// Viewport size in physical pixels.
|
||
pub size_px: [f32; 2],
|
||
/// Section cut: (normal, d); fragments with normal·p > d are hidden. A zero normal: none.
|
||
pub clip: [f32; 4],
|
||
/// Colour of the inside of cut bodies (straight sRGBA, 0..1).
|
||
pub cap: [f32; 4],
|
||
}
|
||
|
||
struct Batch {
|
||
buffer: wgpu::Buffer,
|
||
count: u32,
|
||
}
|
||
|
||
#[derive(Default)]
|
||
struct Batches {
|
||
key: Option<u64>,
|
||
tris: Option<Batch>,
|
||
trans: Option<Batch>,
|
||
lines: Option<Batch>,
|
||
overlays: Option<Batch>,
|
||
ghost: Option<Batch>,
|
||
xray: Option<Batch>,
|
||
under: Option<Batch>,
|
||
}
|
||
|
||
impl Batches {
|
||
fn take(&mut self, device: &wgpu::Device, key: u64, slot: &SceneSlot) {
|
||
if self.key == Some(key) {
|
||
return;
|
||
}
|
||
if let Some(sc) = slot.lock().ok().and_then(|mut s| s.take()) {
|
||
self.tris = upload(device, "sc_tris", &sc.tris, TRI_SIZE);
|
||
self.trans = upload(device, "sc_trans", &sc.trans, TRI_SIZE);
|
||
self.lines = upload(device, "sc_lines", &sc.lines, LINE_SIZE);
|
||
self.overlays = upload(device, "sc_overlay", &sc.overlay, LINE_SIZE);
|
||
self.ghost = upload(device, "sc_ghost", &sc.ghost, TRI_SIZE);
|
||
self.xray = upload(device, "sc_xray", &sc.xray, TRI_SIZE);
|
||
self.under = upload(device, "sc_under", &sc.under, LINE_SIZE);
|
||
self.key = Some(key);
|
||
}
|
||
}
|
||
}
|
||
|
||
struct Resources {
|
||
tri: wgpu::RenderPipeline,
|
||
/// Highlight triangles over the model (depth test ≤, no depth write).
|
||
tri_hl: wgpu::RenderPipeline,
|
||
trans: wgpu::RenderPipeline,
|
||
ghost: wgpu::RenderPipeline,
|
||
xray: wgpu::RenderPipeline,
|
||
line: wgpu::RenderPipeline,
|
||
overlay: wgpu::RenderPipeline,
|
||
uniform: wgpu::Buffer,
|
||
bind: wgpu::BindGroup,
|
||
linear_out: bool,
|
||
model: Batches,
|
||
highlight: Batches,
|
||
preview: Batches,
|
||
}
|
||
|
||
const SHADER: &str = r#"
|
||
struct U {
|
||
vp: mat4x4<f32>,
|
||
back: vec4<f32>, // xyz = toward the eye, w = 1 for linear output
|
||
screen: vec4<f32>, // viewport width, height (px), depth bias
|
||
clip: vec4<f32>, // section plane: normal, d (zero normal: no section)
|
||
cap: vec4<f32>, // colour of the inside of cut bodies
|
||
};
|
||
|
||
fn clipped(p: vec3<f32>) -> bool {
|
||
return length(u.clip.xyz) > 0.5 && dot(u.clip.xyz, p) > u.clip.w;
|
||
}
|
||
@group(0) @binding(0) var<uniform> u: U;
|
||
|
||
fn to_linear(c: vec3<f32>) -> vec3<f32> {
|
||
return select(c, pow((c + vec3<f32>(0.055)) / vec3<f32>(1.055), vec3<f32>(2.4)), c > vec3<f32>(0.04045));
|
||
}
|
||
|
||
fn out_color(c: vec4<f32>) -> vec4<f32> {
|
||
if (u.back.w > 0.5) {
|
||
return vec4<f32>(to_linear(c.rgb), c.a);
|
||
}
|
||
return c;
|
||
}
|
||
|
||
struct TOut {
|
||
@builtin(position) pos: vec4<f32>,
|
||
@location(0) n: vec3<f32>,
|
||
@location(1) c: vec4<f32>,
|
||
@location(2) wp: vec3<f32>,
|
||
};
|
||
|
||
@vertex
|
||
fn vs_tri(@location(0) p: vec3<f32>, @location(1) n: vec3<f32>, @location(2) c: vec4<f32>) -> TOut {
|
||
var o: TOut;
|
||
o.pos = u.vp * vec4<f32>(p, 1.0);
|
||
o.n = n;
|
||
o.c = c;
|
||
o.wp = p;
|
||
return o;
|
||
}
|
||
|
||
/// Opaque model surfaces: cut by the section plane, the inside shows as a flat cap colour.
|
||
@fragment
|
||
fn fs_solid(i: TOut, @builtin(front_facing) front: bool) -> @location(0) vec4<f32> {
|
||
if (clipped(i.wp)) { discard; }
|
||
if (!front && length(u.clip.xyz) > 0.5) {
|
||
return out_color(u.cap);
|
||
}
|
||
return shade(i);
|
||
}
|
||
|
||
@fragment
|
||
fn fs_tri(i: TOut) -> @location(0) vec4<f32> {
|
||
if (clipped(i.wp)) { discard; }
|
||
return shade(i);
|
||
}
|
||
|
||
fn shade(i: TOut) -> vec4<f32> {
|
||
// A zero normal marks flat colour (selection fills, translucent planes).
|
||
if (length(i.n) < 0.5) {
|
||
return out_color(i.c);
|
||
}
|
||
let v = normalize(u.back.xyz);
|
||
var n = normalize(i.n);
|
||
if (dot(n, v) < 0.0) { n = -n; }
|
||
let key = normalize(v * 0.8 + vec3<f32>(-0.3, 0.2, 0.6));
|
||
let diff = max(dot(n, key), 0.0);
|
||
let fill = max(dot(n, v), 0.0);
|
||
let h = normalize(key + v);
|
||
let spec = pow(max(dot(n, h), 0.0), 40.0) * 0.25;
|
||
let k = 0.42 + 0.38 * diff + 0.25 * fill;
|
||
return out_color(vec4<f32>(min(i.c.rgb * k + vec3<f32>(spec), vec3<f32>(1.0)), i.c.a));
|
||
}
|
||
|
||
@vertex
|
||
fn vs_ghost(@location(0) p: vec3<f32>, @location(1) n: vec3<f32>, @location(2) c: vec4<f32>) -> TOut {
|
||
var o: TOut;
|
||
o.pos = u.vp * vec4<f32>(p, 1.0);
|
||
o.pos.z = o.pos.z + u.screen.z * 4.0 * o.pos.w;
|
||
o.n = n;
|
||
o.c = c;
|
||
o.wp = p;
|
||
return o;
|
||
}
|
||
|
||
struct LOut {
|
||
@builtin(position) pos: vec4<f32>,
|
||
@location(0) c: vec4<f32>,
|
||
@location(1) wp: vec3<f32>,
|
||
};
|
||
|
||
@vertex
|
||
fn vs_line(@builtin(vertex_index) vi: u32, @location(0) a: vec3<f32>, @location(1) b: vec3<f32>, @location(2) c: vec4<f32>, @location(3) w: f32) -> LOut {
|
||
let ca = u.vp * vec4<f32>(a, 1.0);
|
||
let cb = u.vp * vec4<f32>(b, 1.0);
|
||
let half = u.screen.xy * 0.5;
|
||
let sa = ca.xy / max(ca.w, 1e-6) * half;
|
||
let sb = cb.xy / max(cb.w, 1e-6) * half;
|
||
var dir = sb - sa;
|
||
let len = length(dir);
|
||
if (len < 1e-6) { dir = vec2<f32>(1.0, 0.0); } else { dir = dir / len; }
|
||
let nrm = vec2<f32>(-dir.y, dir.x);
|
||
// Two triangles: corners (t, side).
|
||
var ts = array<f32, 6>(0.0, 1.0, 1.0, 0.0, 1.0, 0.0);
|
||
var ss = array<f32, 6>(-1.0, -1.0, 1.0, -1.0, 1.0, 1.0);
|
||
let t = ts[vi];
|
||
let s = ss[vi];
|
||
let base = select(ca, cb, t > 0.5);
|
||
let off = nrm * s * w * 0.5 + dir * (t * 2.0 - 1.0) * w * 0.5;
|
||
var o: LOut;
|
||
o.pos = vec4<f32>(base.xy + off / half * base.w, base.z - u.screen.z * base.w, base.w);
|
||
o.c = c;
|
||
o.wp = select(a, b, t > 0.5);
|
||
return o;
|
||
}
|
||
|
||
@fragment
|
||
fn fs_line(i: LOut) -> @location(0) vec4<f32> {
|
||
if (clipped(i.wp)) { discard; }
|
||
return out_color(i.c);
|
||
}
|
||
|
||
/// Lines the section never cuts (the grid, highlights drawn on top).
|
||
@fragment
|
||
fn fs_line_all(i: LOut) -> @location(0) vec4<f32> {
|
||
return out_color(i.c);
|
||
}
|
||
"#;
|
||
|
||
fn tri_layout() -> wgpu::VertexBufferLayout<'static> {
|
||
const A: [wgpu::VertexAttribute; 3] = wgpu::vertex_attr_array![0 => Float32x3, 1 => Float32x3, 2 => Unorm8x4];
|
||
wgpu::VertexBufferLayout { array_stride: TRI_SIZE as u64, step_mode: wgpu::VertexStepMode::Vertex, attributes: &A }
|
||
}
|
||
|
||
fn line_layout() -> wgpu::VertexBufferLayout<'static> {
|
||
const A: [wgpu::VertexAttribute; 4] = wgpu::vertex_attr_array![0 => Float32x3, 1 => Float32x3, 2 => Unorm8x4, 3 => Float32];
|
||
wgpu::VertexBufferLayout { array_stride: LINE_SIZE as u64, step_mode: wgpu::VertexStepMode::Instance, attributes: &A }
|
||
}
|
||
|
||
/// The target configuration: colour format, depth format and MSAA sample count of the app.
|
||
#[derive(Clone, Copy, Debug)]
|
||
pub struct GpuTarget {
|
||
pub format: wgpu::TextureFormat,
|
||
pub depth: Option<wgpu::TextureFormat>,
|
||
pub samples: u32,
|
||
}
|
||
|
||
impl Resources {
|
||
fn new(device: &wgpu::Device, t: GpuTarget) -> Self {
|
||
let module =
|
||
device.create_shader_module(wgpu::ShaderModuleDescriptor { label: Some("sc_viewport"), source: wgpu::ShaderSource::Wgsl(SHADER.into()) });
|
||
let bgl = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
|
||
label: Some("sc_viewport"),
|
||
entries: &[wgpu::BindGroupLayoutEntry {
|
||
binding: 0,
|
||
visibility: wgpu::ShaderStages::VERTEX_FRAGMENT,
|
||
ty: wgpu::BindingType::Buffer { ty: wgpu::BufferBindingType::Uniform, has_dynamic_offset: false, min_binding_size: None },
|
||
count: None,
|
||
}],
|
||
});
|
||
let layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
|
||
label: Some("sc_viewport"),
|
||
bind_group_layouts: &[Some(&bgl)],
|
||
immediate_size: 0,
|
||
});
|
||
let uniform = device.create_buffer(&wgpu::BufferDescriptor {
|
||
label: Some("sc_viewport_u"),
|
||
size: UNIFORM_SIZE,
|
||
usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
|
||
mapped_at_creation: false,
|
||
});
|
||
let bind = device.create_bind_group(&wgpu::BindGroupDescriptor {
|
||
label: Some("sc_viewport"),
|
||
layout: &bgl,
|
||
entries: &[wgpu::BindGroupEntry { binding: 0, resource: uniform.as_entire_binding() }],
|
||
});
|
||
let depth = |compare: wgpu::CompareFunction, write: bool| -> Option<wgpu::DepthStencilState> {
|
||
t.depth.map(|format| wgpu::DepthStencilState {
|
||
format,
|
||
depth_write_enabled: Some(write),
|
||
depth_compare: Some(compare),
|
||
stencil: Default::default(),
|
||
bias: Default::default(),
|
||
})
|
||
};
|
||
let pipeline = |label: &str,
|
||
vs: &str,
|
||
fs: &str,
|
||
buf: wgpu::VertexBufferLayout<'static>,
|
||
ds: Option<wgpu::DepthStencilState>,
|
||
blend: Option<wgpu::BlendState>| {
|
||
device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
|
||
label: Some(label),
|
||
layout: Some(&layout),
|
||
vertex: wgpu::VertexState { module: &module, entry_point: Some(vs), buffers: &[Some(buf)], compilation_options: Default::default() },
|
||
primitive: wgpu::PrimitiveState { topology: wgpu::PrimitiveTopology::TriangleList, ..Default::default() },
|
||
depth_stencil: ds,
|
||
multisample: wgpu::MultisampleState { count: t.samples.max(1), mask: !0, alpha_to_coverage_enabled: false },
|
||
fragment: Some(wgpu::FragmentState {
|
||
module: &module,
|
||
entry_point: Some(fs),
|
||
targets: &[Some(wgpu::ColorTargetState { format: t.format, blend, write_mask: wgpu::ColorWrites::ALL })],
|
||
compilation_options: Default::default(),
|
||
}),
|
||
multiview_mask: None,
|
||
cache: None,
|
||
})
|
||
};
|
||
let alpha = Some(wgpu::BlendState::ALPHA_BLENDING);
|
||
Resources {
|
||
tri: pipeline("sc_tris", "vs_tri", "fs_solid", tri_layout(), depth(wgpu::CompareFunction::Less, true), None),
|
||
tri_hl: pipeline("sc_tris_hl", "vs_tri", "fs_tri", tri_layout(), depth(wgpu::CompareFunction::LessEqual, false), alpha),
|
||
trans: pipeline("sc_trans", "vs_tri", "fs_tri", tri_layout(), depth(wgpu::CompareFunction::LessEqual, false), alpha),
|
||
ghost: pipeline("sc_ghost", "vs_ghost", "fs_tri", tri_layout(), depth(wgpu::CompareFunction::LessEqual, false), alpha),
|
||
xray: pipeline("sc_xray", "vs_tri", "fs_tri", tri_layout(), depth(wgpu::CompareFunction::Always, false), alpha),
|
||
line: pipeline("sc_lines", "vs_line", "fs_line", line_layout(), depth(wgpu::CompareFunction::LessEqual, false), alpha),
|
||
overlay: pipeline("sc_overlay", "vs_line", "fs_line_all", line_layout(), depth(wgpu::CompareFunction::Always, false), alpha),
|
||
uniform,
|
||
bind,
|
||
linear_out: t.format.is_srgb(),
|
||
model: Batches::default(),
|
||
highlight: Batches::default(),
|
||
preview: Batches::default(),
|
||
}
|
||
}
|
||
}
|
||
|
||
fn upload(device: &wgpu::Device, label: &str, bytes: &[u8], stride: usize) -> Option<Batch> {
|
||
if bytes.len() < stride {
|
||
return None;
|
||
}
|
||
Some(Batch {
|
||
buffer: device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
|
||
label: Some(label),
|
||
contents: bytes,
|
||
usage: wgpu::BufferUsages::VERTEX,
|
||
}),
|
||
count: u32::try_from(bytes.len() / stride).unwrap_or(0),
|
||
})
|
||
}
|
||
|
||
/// Create the pipelines. Call once with the app's render state and its depth/MSAA settings.
|
||
pub fn install(rs: &egui_wgpu::RenderState, depth_bits: u8, samples: u32) -> GpuTarget {
|
||
let t = GpuTarget { format: rs.target_format, depth: egui_wgpu::depth_format_from_bits(depth_bits, 0), samples };
|
||
let res = Resources::new(&rs.device, t);
|
||
rs.renderer.write().callback_resources.insert(res);
|
||
t
|
||
}
|
||
|
||
impl egui_wgpu::CallbackTrait for ViewportCallback {
|
||
fn prepare(
|
||
&self,
|
||
device: &wgpu::Device,
|
||
queue: &wgpu::Queue,
|
||
_screen: &egui_wgpu::ScreenDescriptor,
|
||
_encoder: &mut wgpu::CommandEncoder,
|
||
resources: &mut egui_wgpu::CallbackResources,
|
||
) -> Vec<wgpu::CommandBuffer> {
|
||
let Some(res) = resources.get_mut::<Resources>() else { return Vec::new() };
|
||
res.model.take(device, self.key, &self.slot);
|
||
res.highlight.take(device, self.hl_key, &self.hl_slot);
|
||
res.preview.take(device, self.pv_key, &self.pv_slot);
|
||
queue.write_buffer(&res.uniform, 0, &uniform_bytes(self, self.size_px[0], self.size_px[1], res.linear_out));
|
||
Vec::new()
|
||
}
|
||
|
||
fn paint(&self, info: egui::PaintCallbackInfo, pass: &mut wgpu::RenderPass<'static>, resources: &egui_wgpu::CallbackResources) {
|
||
let Some(res) = resources.get::<Resources>() else { return };
|
||
let vp = info.viewport_in_pixels();
|
||
if vp.width_px <= 0 || vp.height_px <= 0 {
|
||
return;
|
||
}
|
||
pass.set_viewport(vp.left_px as f32, vp.top_px as f32, vp.width_px as f32, vp.height_px as f32, 0.0, 1.0);
|
||
pass.set_bind_group(0, &res.bind, &[]);
|
||
let tris = |pass: &mut wgpu::RenderPass<'static>, p: &wgpu::RenderPipeline, b: &Option<Batch>| {
|
||
if let Some(b) = b {
|
||
pass.set_pipeline(p);
|
||
pass.set_vertex_buffer(0, b.buffer.slice(..));
|
||
pass.draw(0..b.count, 0..1);
|
||
}
|
||
};
|
||
let lines = |pass: &mut wgpu::RenderPass<'static>, p: &wgpu::RenderPipeline, b: &Option<Batch>| {
|
||
if let Some(b) = b {
|
||
pass.set_pipeline(p);
|
||
pass.set_vertex_buffer(0, b.buffer.slice(..));
|
||
pass.draw(0..6, 0..b.count);
|
||
}
|
||
};
|
||
let (m, h, pv) = (&res.model, &res.highlight, &res.preview);
|
||
lines(pass, &res.overlay, &m.under);
|
||
tris(pass, &res.tri, &m.tris);
|
||
tris(pass, &res.tri, &pv.tris);
|
||
tris(pass, &res.tri_hl, &h.tris);
|
||
lines(pass, &res.line, &m.lines);
|
||
lines(pass, &res.line, &pv.lines);
|
||
lines(pass, &res.line, &h.lines);
|
||
tris(pass, &res.ghost, &pv.ghost);
|
||
tris(pass, &res.trans, &m.trans);
|
||
tris(pass, &res.trans, &h.trans);
|
||
tris(pass, &res.xray, &pv.xray);
|
||
lines(pass, &res.overlay, &m.overlays);
|
||
lines(pass, &res.overlay, &h.overlays);
|
||
}
|
||
}
|
||
|
||
/// Uniform bytes for a frame.
|
||
pub fn uniform_bytes(cb: &ViewportCallback, w: f32, h: f32, linear: bool) -> Vec<u8> {
|
||
let mut v: Vec<f32> = cb.view_proj.iter().flatten().copied().collect();
|
||
v.extend([cb.back[0], cb.back[1], cb.back[2], if linear { 1.0 } else { 0.0 }]);
|
||
v.extend([w.max(1.0), h.max(1.0), 2e-4, 0.0]);
|
||
v.extend(cb.clip);
|
||
v.extend(cb.cap);
|
||
v.iter().flat_map(|x| x.to_le_bytes()).collect()
|
||
}
|
||
|
||
#[cfg(test)]
|
||
mod tests {
|
||
use egui_wgpu::wgpu::naga;
|
||
|
||
/// The viewport shader parses and validates (a bad shader would only fail at run time).
|
||
#[test]
|
||
fn shader_is_valid() {
|
||
let module = naga::front::wgsl::parse_str(super::SHADER).unwrap_or_else(|e| panic!("{}", e.emit_to_string(super::SHADER)));
|
||
naga::valid::Validator::new(naga::valid::ValidationFlags::all(), naga::valid::Capabilities::empty()).validate(&module).unwrap();
|
||
}
|
||
}
|