Add occlusion query rust shaders

Author: LegNeato

shaders/rust/Cargo.lock

@@ -66,6 +66,9 @@ members = [
     "texturecubemap/skybox",
     "renderheadless/triangle",
     "sphericalenvmapping/sem",
+    "occlusionquery/simple",
+    "occlusionquery/mesh",
+    "occlusionquery/occluder",
 ]
 
 [workspace.dependencies]

shaders/rust/Cargo.toml

@@ -68,7 +68,7 @@ def compile_shader(shader_dir):
                 print(f"  Created {final_path.name} (entry point: {entry_point})")
 
                 # Special case: move to parent directory for nested shader structures
-                if shader_dir.parent.name in ["base", "descriptorsets", "dynamicuniformbuffer", "multisampling", "pipelines", "specializationconstants", "computeshader", "texturearray", "screenshot", "negativeviewportheight", "stencilbuffer", "parallaxmapping", "computecloth", "ssao", "shadowmapping", "deferred", "computenbody", "bloom", "hdr", "radialblur", "pbribl", "indirectdraw", "instancing", "texturecubemap", "renderheadless", "sphericalenvmapping"]:
+                if shader_dir.parent.name in ["base", "descriptorsets", "dynamicuniformbuffer", "multisampling", "pipelines", "specializationconstants", "computeshader", "texturearray", "screenshot", "negativeviewportheight", "stencilbuffer", "parallaxmapping", "computecloth", "ssao", "shadowmapping", "deferred", "computenbody", "bloom", "hdr", "radialblur", "pbribl", "indirectdraw", "instancing", "texturecubemap", "renderheadless", "sphericalenvmapping", "occlusionquery"]:
                     parent_dir = shader_dir.parent
                     parent_final_path = parent_dir / f"{shader_name}.{shader_type}.spv"
                     shutil.move(str(final_path), str(parent_final_path))

shaders/rust/compileshaders.py

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

shaders/rust/occlusionquery/mesh.frag.spv

@@ -0,0 +1,67 @@
+#![cfg_attr(target_arch = "spirv", no_std)]
+#![allow(clippy::missing_safety_doc)]
+
+use spirv_std::{spirv, glam::{vec3, vec4, Mat3, Mat4, Vec3, Vec4}, num_traits::Float};
+
+#[repr(C)]
+#[derive(Copy, Clone)]
+pub struct Ubo {
+    pub projection: Mat4,
+    pub view: Mat4,
+    pub model: Mat4,
+    pub color: Vec4,
+    pub light_pos: Vec4,
+    pub visible: f32,
+}
+
+#[spirv(vertex)]
+pub fn main_vs(
+    in_pos: Vec3,
+    in_normal: Vec3,
+    in_color: Vec3,
+    #[spirv(uniform, descriptor_set = 0, binding = 0)] ubo: &Ubo,
+    #[spirv(position)] out_position: &mut Vec4,
+    out_normal: &mut Vec3,
+    out_color: &mut Vec3,
+    out_visible: &mut f32,
+    out_view_vec: &mut Vec3,
+    out_light_vec: &mut Vec3,
+) {
+    *out_normal = in_normal;
+    *out_color = in_color * ubo.color.truncate();
+    *out_visible = ubo.visible;
+    
+    *out_position = ubo.projection * ubo.view * 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 model_mat3 = Mat3::from_cols(
+        ubo.model.x_axis.truncate(),
+        ubo.model.y_axis.truncate(),
+        ubo.model.z_axis.truncate(),
+    );
+    *out_normal = model_mat3 * in_normal;
+    *out_light_vec = ubo.light_pos.truncate() - pos.truncate();
+    *out_view_vec = -pos.truncate();
+}
+
+#[spirv(fragment)]
+pub fn main_fs(
+    in_normal: Vec3,
+    in_color: Vec3,
+    in_visible: f32,
+    in_view_vec: Vec3,
+    in_light_vec: Vec3,
+    out_frag_color: &mut Vec4,
+) {
+    if in_visible > 0.0 {
+        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(0.25) * in_color;
+        let specular = r.dot(v).max(0.0).powf(8.0) * vec3(0.75, 0.75, 0.75);
+        *out_frag_color = vec4(diffuse.x + specular.x, diffuse.y + specular.y, diffuse.z + specular.z, 1.0);
+    } else {
+        *out_frag_color = vec4(0.1, 0.1, 0.1, 1.0);
+    }
+}