From 7824e2ac18d714ac70ea021030997af42d7ccc26 Mon Sep 17 00:00:00 2001
From: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
Date: Sun, 30 Mar 2025 16:41:20 +0200
Subject: [PATCH] Implement `MulAssign` for `Pos2`

---
 crates/emath/src/pos2.rs          | 14 ++++++++++++--
 crates/epaint/src/shapes/shape.rs |  2 +-
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/crates/emath/src/pos2.rs b/crates/emath/src/pos2.rs
index 1f4bd8642..62590b10f 100644
--- a/crates/emath/src/pos2.rs
+++ b/crates/emath/src/pos2.rs
@@ -1,5 +1,7 @@
-use std::fmt;
-use std::ops::{Add, AddAssign, Sub, SubAssign};
+use std::{
+    fmt,
+    ops::{Add, AddAssign, MulAssign, Sub, SubAssign},
+};
 
 use crate::{lerp, Div, Mul, Vec2};
 
@@ -305,6 +307,14 @@ impl Mul<Pos2> for f32 {
     }
 }
 
+impl MulAssign<f32> for Pos2 {
+    #[inline(always)]
+    fn mul_assign(&mut self, rhs: f32) {
+        self.x *= rhs;
+        self.y *= rhs;
+    }
+}
+
 impl Div<f32> for Pos2 {
     type Output = Self;
 
diff --git a/crates/epaint/src/shapes/shape.rs b/crates/epaint/src/shapes/shape.rs
index 006289bf1..38af4ca2c 100644
--- a/crates/epaint/src/shapes/shape.rs
+++ b/crates/epaint/src/shapes/shape.rs
@@ -484,7 +484,7 @@ impl Shape {
                     let row = Arc::make_mut(&mut placed_row.row);
                     row.visuals.mesh_bounds = transform.scaling * row.visuals.mesh_bounds;
                     for v in &mut row.visuals.mesh.vertices {
-                        v.pos = Pos2::new(transform.scaling * v.pos.x, transform.scaling * v.pos.y);
+                        v.pos *= transform.scaling;
                     }
                 }