Add math module

studio/src/lib.rs

@@ -18,6 +18,7 @@ use wasm_bindgen::prelude::*;
 mod design_system;
 mod input;
 mod interaction;
+mod math;
 mod orbit_cam;
 mod skybox;
 mod test_scene;

studio/src/math/mod.rs

@@ -0,0 +1,3 @@
+mod util;
+
+pub use util::*;

studio/src/math/util.rs

@@ -0,0 +1,17 @@
+use bevy::prelude::Vec3;
+
+pub trait NearlyEq<Rhs> {
+    fn nearly_eq(self, rhs: Rhs) -> bool;
+}
+
+impl NearlyEq<f32> for f32 {
+    fn nearly_eq(self, rhs: f32) -> bool {
+        (self - rhs).abs() < Self::EPSILON
+    }
+}
+
+impl NearlyEq<Vec3> for Vec3 {
+    fn nearly_eq(self, rhs: Vec3) -> bool {
+        self.x.nearly_eq(rhs.x) && self.y.nearly_eq(rhs.y) && self.z.nearly_eq(rhs.z)
+    }
+}

studio/src/orbit_cam.rs

@@ -6,7 +6,10 @@ use bevy::{
     window::{CursorGrabMode, PrimaryWindow},
 };
 
-use crate::input::{Action, CameraMotion, InputAction, Lifecycle};
+use crate::{
+    input::{Action, CameraMotion, InputAction, Lifecycle},
+    math::NearlyEq,
+};
 
 pub struct OrbitCamPlugin;
 
@@ -286,25 +289,3 @@ fn do_rotate(win: &Window, delta: Vec2, xform: &mut Transform, orbit_cam: &mut O
 fn curve_sin(t: f32) -> f32 {
     -1. * (f32::cos(t * consts::PI) / 2.) + 0.5
 }
-
-trait NearlyEq {
-    type Rhs;
-
-    fn nearly_eq(self, rhs: Self::Rhs) -> bool;
-}
-
-impl NearlyEq for f32 {
-    type Rhs = Self;
-
-    fn nearly_eq(self, rhs: Self::Rhs) -> bool {
-        (self - rhs).abs() < Self::EPSILON
-    }
-}
-
-impl NearlyEq for Vec3 {
-    type Rhs = Self;
-
-    fn nearly_eq(self, rhs: Self::Rhs) -> bool {
-        self.x.nearly_eq(rhs.x) && self.y.nearly_eq(rhs.y) && self.z.nearly_eq(rhs.z)
-    }
-}