Update glam and re-export glam from spirv_std

Cargo.toml

@@ -13,7 +13,3 @@ members = [
     "crates/spirv-tools",
     "crates/spirv-tools-sys",
 ]
-
-[patch.crates-io]
-# https://github.com/bitshifter/glam-rs/pull/85
-glam = { git = "https://github.com/EmbarkStudios/glam-rs", rev = "d55ff75e91aab01c4fd9808e3ca9c079dfa7315c" }

crates/spirv-std/Cargo.toml

@@ -7,3 +7,5 @@ license = "MIT OR Apache-2.0"
 repository = "https://github.com/EmbarkStudios/rust-gpu"
 
 [dependencies]
+# https://github.com/bitshifter/glam-rs/pull/85
+glam = { git = "https://github.com/EmbarkStudios/glam-rs", rev = "c9561e4dfd55fa5a9d6838cae3c9e90c8edafaf9" }

crates/spirv-std/src/lib.rs

@@ -39,6 +39,8 @@
 mod math_ext;
 pub use math_ext::MathExt;
 
+pub use glam;
+
 macro_rules! pointer_addrspace_write {
     (false) => {};
     (true) => {

examples/runners/cpu/Cargo.toml

@@ -10,7 +10,7 @@ publish = false
 minifb = "0.19.1"
 # bring in the shader as natively compiled code
 sky-shader = { path = "../../shaders/sky-shader" }
-glam = "0.9"
+spirv-std = { path = "../../../crates/spirv-std" }
 
 # for parallelism, not really needed though
 rayon = "1.5"

examples/runners/cpu/src/main.rs

@@ -1,6 +1,6 @@
-use glam::{vec2, Vec4};
 use minifb::{Key, Window, WindowOptions};
 use rayon::prelude::*;
+use spirv_std::glam::{vec2, Vec4};
 use std::time::Instant;
 
 // apply the srgb OETF (i.e. do "linear to sRGB")

examples/shaders/simplest-shader/Cargo.toml

@@ -11,4 +11,3 @@ crate-type = ["dylib"]
 
 [dependencies]
 spirv-std = { path = "../../../crates/spirv-std" }
-glam = "0.9"

examples/shaders/simplest-shader/src/lib.rs

@@ -3,7 +3,7 @@
 #![feature(register_attr)]
 #![register_attr(spirv)]
 
-use glam::Vec4;
+use spirv_std::glam::Vec4;
 use spirv_std::{Input, Output};
 
 #[allow(unused_attributes)]

examples/shaders/sky-shader/Cargo.toml

@@ -11,4 +11,3 @@ crate-type = ["dylib"]
 
 [dependencies]
 spirv-std = { path = "../../../crates/spirv-std" }
-glam = "0.9"

examples/shaders/sky-shader/src/lib.rs

@@ -6,7 +6,7 @@
 #![register_attr(spirv)]
 
 use core::f32::consts::PI;
-use glam::{const_vec3, Mat4, Vec2, Vec3, Vec4};
+use spirv_std::glam::{const_vec3, Mat4, Vec2, Vec3, Vec4};
 use spirv_std::{Input, MathExt, Output};
 
 const DEPOLARIZATION_FACTOR: f32 = 0.035;
@@ -160,11 +160,7 @@ pub fn fs(screen_pos: Vec2) -> Vec4 {
         Vec4::new(0.0, -0.14834046, -0.98893654, 0.0),
     );
 
-    let clip_pos = screen_pos.extend(1.0).extend(1.0);
-    let world_pos = {
-        let p = clip_to_world.mul_vec4(clip_pos);
-        p.truncate() / p.w()
-    };
+    let world_pos = clip_to_world.transform_point3(screen_pos.extend(1.0));
     let dir = (world_pos - eye_pos).normalize();
 
     // evaluate Preetham sky model