implemented MulAssign for Transform

Co-Authored-By: Chitose Yuuzaki <chitoyuu@potatoes.gay>
Co-Authored-By: Jan Haller <708488+Bromeon@users.noreply.github.com>

Author: 3 people

gdnative-core/src/core_types/geom/transform.rs

@@ -1,4 +1,4 @@
-use std::ops::Mul;
+use std::ops::{Mul, MulAssign};
 
 use crate::core_types::{Basis, Vector3};
 
@@ -295,12 +295,18 @@ impl Transform {
 
 impl Mul<Transform> for Transform {
     type Output = Transform;
+    #[inline]
+    fn mul(mut self, rhs: Self) -> Self::Output {
+        self *= rhs;
+        self
+    }
+}
 
+impl MulAssign<Transform> for Transform {
     #[inline]
-    fn mul(self, rhs: Self) -> Self::Output {
-        let origin = self.xform(rhs.origin);
-        let basis = self.basis * rhs.basis;
-        Self { origin, basis }
+    fn mul_assign(&mut self, rhs: Self) {
+        self.origin = self.xform(rhs.origin);
+        self.basis = self.basis * rhs.basis;
     }
 }