Add nalgebra to the prelude to make the macros work out of the box

examples2d/Cargo.toml

@@ -15,7 +15,6 @@ enhanced-determinism = [ "rapier2d/enhanced-determinism" ]
 [dependencies]
 rand       = "0.8"
 Inflector  = "0.11"
-nalgebra   = "0.27"
 lyon       = "0.17"
 usvg       = "0.14"
 

examples2d/all_examples2.rs

@@ -1,7 +1,5 @@
 #![allow(dead_code)]
 
-extern crate nalgebra as na;
-
 #[cfg(target_arch = "wasm32")]
 use wasm_bindgen::prelude::*;
 

examples2d/heightfield2.rs

@@ -1,4 +1,4 @@
-use na::DVector;
+use rapier2d::na::DVector;
 use rapier2d::prelude::*;
 use rapier_testbed2d::Testbed;
 

examples2d/polyline2.rs

@@ -1,4 +1,4 @@
-use na::ComplexField;
+use rapier2d::na::ComplexField;
 use rapier2d::prelude::*;
 use rapier_testbed2d::Testbed;