début renderer

assets/shaders/README.md

@@ -0,0 +1,7 @@
+# Shaders Directory
+
+Contains WGSL shader source files compiled at runtime by wgpu. Each file defines vertex and fragment stages for a specific rendering pipeline.
+
+## Files
+
+- **basic_shader.wgsl** — Simple triangle shader used as a minimal example. Renders a solid red triangle using hardcoded positions computed entirely on the GPU side.

assets/shaders/basic_shader.wgsl

@@ -1,14 +1,20 @@
+//! # Basic Shader Module
+struct VertexInput {
+    @location(0) position: vec3<f32>,
+};
+
+struct VertexOutput {
+    @builtin(position) clip_position: vec4<f32>,
+};
+
 @vertex
-pub fn vs_main(@builtin(vertex_index) vertex_index: u32) -> @builtin(position) vec4f {
-    var positions = array<vec2f, 3>(
-        vec2f(0.0, 0.5),
-        vec2f(-0.5, -0.5),
-        vec2f(0.5, -0.5),
-    );
-    return vec4f(positions[vertex_index], 0.0, 1.0);
+fn vs_main(model: VertexInput) -> VertexOutput {
+    var out: VertexOutput;
+    out.clip_position = vec4<f32>(model.position, 1.0);
+    return out;
 }
 
 @fragment
-pub fn fs_main() -> @location(0) vec4f {
-    return vec4f(1.0, 0.0, 0.0, 1.0);
+fn fs_main() -> @location(0) vec4<f32> {
+    return vec4<f32>(1.0, 0.5, 0.2, 1.0); // Couleur orange
 }

lib/renderer.rs

@@ -5,6 +5,9 @@
 
 use crate::conf::BASIC_SHADER;
 
+// On demande à Cargo de surveiller ce fichier (si le wsgl est modifié, mais pas la lib)
+const _: &[u8] = include_bytes!("../assets/shaders/basic_shader.wgsl");
+
 /// Renders geometry using a fixed RenderPipeline. This struct owns heavy objects
 /// (RenderPipeline) compiled once at creation time, avoiding per-frame allocation.
 pub struct Renderer {
@@ -19,10 +22,15 @@ impl Renderer {
     /// by the orchestrator (main.rs). The pipeline is compiled only here; subsequent calls are cheap.
     pub fn new(device: &wgpu::Device, format: wgpu::TextureFormat) -> Self {
         // In wgpu 30, ShaderModuleDescriptor fields changed: label is Option<&str> (not Some(label)),
-        // and source uses Cow<'_, str> instead of [u8]. include_str! + .into() converts &str → Cow<str>.
+        // and source uses Cow<'_, str> instead of [u8].
+        // BASIC_SHADER serves as both the debug label and the file path loaded at runtime
+        // (include_str!() requires a string literal, not a variable).
+        // See assets/shaders/basic_shader.wgsl for the WGSL source — defines vs_main + fs_main stages.
+        let shader_source =
+            std::fs::read_to_string(BASIC_SHADER).expect("Failed to read shader file");
         let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
             label: Some(BASIC_SHADER),
-            source: wgpu::ShaderSource::Wgsl(include_str!("../assets/shaders/basic_shader.wgsl").into()),
+            source: wgpu::ShaderSource::Wgsl(shader_source.into()),
         });
 
         // push_constant_ranges → removed in wgpu 30; replaced by immediate_size for var<immediate> support.
@@ -98,4 +106,8 @@ impl Renderer {
         drop(render_pass);
         queue.submit(std::iter::once(encoder.finish()));
     }
+    // méthode utilitaire pour cacher le "bruit"
+    pub fn submit_commands(&self, queue: &wgpu::Queue, encoder: wgpu::CommandEncoder) {
+        queue.submit(std::iter::once(encoder.finish()));
+    }
 }