From 8eb9fa8885924fa10ce4c30c3c2811441f9c3e98 Mon Sep 17 00:00:00 2001
From: numzero <numzer0@yandex.ru>
Date: Wed, 5 Aug 2026 00:38:52 +0300
Subject: [PATCH] gray cube

---
 src/lib.rs | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 3d75395..1dc927b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -39,23 +39,27 @@ pub struct Core {
 	surface: wgpu::Surface<'static>,
 
 	mesh_pipeline: render::mesh::Pipeline,
-	mesh1: render::mesh::GpuMeshIndexed,
+	mesh_color: render::mesh::GpuMeshIndexed,
+	mesh_gray: render::mesh::GpuMeshIndexed,
 	depth: wgpu::Texture,
 }
 
-fn cube() -> render::mesh::CpuMeshIndexed {
+fn cube(a: f32, b: f32) -> render::mesh::CpuMeshIndexed {
+	let gray_level = (b + a) / 2.;
+	let gray = Vec3::splat(gray_level);
+	let color_level = (b - a) / 2.;
 	let mut mesh = render::mesh::CpuMeshIndexed::default();
 	for (u, v, w) in [
 		(Vec3::X, Vec3::Y, Vec3::Z),
 		(Vec3::Y, Vec3::Z, Vec3::X),
 		(Vec3::Z, Vec3::X, Vec3::Y),
 	] {
-		for (m, color) in [(1., w), (-1., 1. - w)] {
+		for m in [1., -1.] {
 			let base = mesh.vertices.len() as u16;
 			for offset in [m * v + u, -m * v + u, -m * v - u, m * v - u] {
 				let vertex = render::mesh::Vertex {
 					position: (m * w + offset),
-					color,
+					color: gray + color_level * m * w,
 					normal: m * w,
 				};
 				mesh.vertices.push(vertex);
@@ -77,8 +81,8 @@ impl Core {
 
 		let depth = Self::create_depth_buffer(&device, pixel_size);
 		let mesh_pipeline = render::mesh::Pipeline::new(&device);
-		let mesh1 = cube();
-		let mesh1 = render::mesh::GpuMeshIndexed::new(&device, &mesh1);
+		let mesh_color = render::mesh::GpuMeshIndexed::new(&device, &cube(0.2, 0.8));
+		let mesh_gray = render::mesh::GpuMeshIndexed::new(&device, &cube(0.7, 0.7));
 
 		Self::configure_surface(&surface, &device, pixel_size);
 
@@ -87,7 +91,8 @@ impl Core {
 			queue,
 			surface,
 			mesh_pipeline,
-			mesh1,
+			mesh_color,
+			mesh_gray,
 			depth,
 		}
 	}
@@ -109,7 +114,7 @@ impl Core {
 			&self.queue,
 			render::mesh::Params {
 				mvp: proj * view,
-				light: vec3(1., 0.5, 0.5).normalize(),
+				light: vec3(0.7, 0.5, 1.0).normalize(),
 				_zero: 0.,
 			},
 		);
@@ -147,7 +152,7 @@ impl Core {
 			}),
 			..Default::default()
 		});
-		self.mesh1.render(&self.mesh_pipeline, &mut pass);
+		self.mesh_gray.render(&self.mesh_pipeline, &mut pass);
 		drop(pass);
 		self.queue.submit(std::iter::once(encoder.finish()));
 	}