Add dynamicrendering rust shader

Author: LegNeato

shaders/rust/Cargo.lock

@@ -73,6 +73,7 @@ members = [
     "debugprintf/toon",
     "pushdescriptors/cube",
     "descriptorbuffer/cube",
+    "dynamicrendering/texture",
 ]
 
 [workspace.dependencies]

shaders/rust/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "dynamicrendering-texture"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+spirv-std = { workspace = true }
+
+[lib]
+crate-type = ["dylib"]

shaders/rust/dynamicrendering/texture.frag.spv

@@ -0,0 +1,69 @@
+#![cfg_attr(target_arch = "spirv", no_std)]
+#![allow(clippy::missing_safety_doc)]
+
+use spirv_std::{spirv, glam::{mat3, vec3, vec4, Mat4, Vec2, Vec3, Vec4}, Image, num_traits::Float};
+use spirv_std::image::SampledImage;
+
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub struct Ubo {
+    pub projection: Mat4,
+    pub model: Mat4,
+    pub view_pos: Vec4,
+}
+
+#[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_normal: &mut Vec3,
+    out_view_vec: &mut Vec3,
+    out_light_vec: &mut Vec3,
+) {
+    *out_uv = in_uv;
+    
+    *out_position = ubo.projection * ubo.model * vec4(in_pos.x, in_pos.y, in_pos.z, 1.0);
+    
+    let pos = ubo.model * vec4(in_pos.x, in_pos.y, in_pos.z, 1.0);
+    let inverse_transpose_model = ubo.model.inverse().transpose();
+    let normal_mat3 = mat3(
+        inverse_transpose_model.x_axis.truncate(),
+        inverse_transpose_model.y_axis.truncate(),
+        inverse_transpose_model.z_axis.truncate(),
+    );
+    *out_normal = normal_mat3 * in_normal;
+    let light_pos = vec3(0.0, 0.0, 0.0);
+    let model_mat3 = mat3(
+        ubo.model.x_axis.truncate(),
+        ubo.model.y_axis.truncate(),
+        ubo.model.z_axis.truncate(),
+    );
+    let l_pos = model_mat3 * light_pos;
+    *out_light_vec = l_pos - pos.truncate();
+    *out_view_vec = ubo.view_pos.truncate() - pos.truncate();
+}
+
+#[spirv(fragment)]
+pub fn main_fs(
+    in_uv: Vec2,
+    in_normal: Vec3,
+    in_view_vec: Vec3,
+    in_light_vec: Vec3,
+    #[spirv(descriptor_set = 1, binding = 0)] sampler_color: &SampledImage<Image!(2D, type=f32, sampled)>,
+    out_frag_color: &mut Vec4,
+) {
+    let color = sampler_color.sample(in_uv);
+    
+    let n = in_normal.normalize();
+    let l = in_light_vec.normalize();
+    let v = in_view_vec.normalize();
+    let r = (-l).reflect(n);
+    let diffuse = n.dot(l).max(0.0) * vec3(1.0, 1.0, 1.0);
+    let specular = r.dot(v).max(0.0).powf(16.0) * color.w;
+    
+    *out_frag_color = vec4(diffuse.x * color.x + specular, diffuse.y * color.y + specular, diffuse.z * color.z + specular, 1.0);
+}