Add terraintessellation rust shaders

Author: LegNeato

shaders/rust/Cargo.lock

@@ -141,6 +141,8 @@ members = [
     "shadowmappingcascade/scene",
     "pipelinestatistics/scene",
     "meshshader/meshshader",
+    "terraintessellation/terrain",
+    "terraintessellation/skysphere",
 ]
 
 [workspace.package]

shaders/rust/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "terraintessellation-skysphere"
+version = "0.1.0"
+edition.workspace = true
+
+[lib]
+crate-type = ["dylib"]
+
+[dependencies]
+spirv-std = { workspace = true }

shaders/rust/terraintessellation/skysphere.frag.spv

@@ -0,0 +1,35 @@
+#![no_std]
+
+use spirv_std::glam::{Mat4, Vec2, Vec3, Vec4, Vec4Swizzles};
+use spirv_std::spirv;
+use spirv_std::{Image, Sampler};
+
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub struct UBO {
+    pub mvp: Mat4,
+}
+
+#[spirv(vertex)]
+pub fn main_vs(
+    in_pos: Vec3,
+    _in_normal: Vec3,
+    in_uv: Vec2,
+    #[spirv(uniform, descriptor_set = 0, binding = 0)] ubo: &UBO,
+    #[spirv(position)] out_position: &mut Vec4,
+    out_uv: &mut Vec2,
+) {
+    *out_position = ubo.mvp * Vec4::from((in_pos, 1.0));
+    *out_uv = in_uv;
+}
+
+#[spirv(fragment)]
+pub fn main_fs(
+    in_uv: Vec2,
+    #[spirv(descriptor_set = 0, binding = 1)] sampler_color_map: &Image!(2D, type=f32, sampled),
+    #[spirv(descriptor_set = 0, binding = 1)] sampler: &Sampler,
+    out_frag_color: &mut Vec4,
+) {
+    let color = sampler_color_map.sample(*sampler, in_uv);
+    *out_frag_color = Vec4::from((color.xyz(), 1.0));
+}