Add support of 64-bits reals.

src/dynamics/joint/fixed_joint.rs

@@ -1,4 +1,4 @@
-use crate::math::{Isometry, SpacialVector};
+use crate::math::{Isometry, Real, SpacialVector};
 
 #[derive(Copy, Clone)]
 #[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
@@ -8,22 +8,22 @@ use crate::math::{Isometry, SpacialVector};
 pub struct FixedJoint {
     /// The frame of reference for the first body affected by this joint, expressed in the local frame
     /// of the first body.
-    pub local_anchor1: Isometry<f32>,
+    pub local_anchor1: Isometry<Real>,
     /// The frame of reference for the second body affected by this joint, expressed in the local frame
     /// of the first body.
-    pub local_anchor2: Isometry<f32>,
+    pub local_anchor2: Isometry<Real>,
     /// The impulse applied to the first body affected by this joint.
     ///
     /// The impulse applied to the second body affected by this joint is given by `-impulse`.
     /// This combines both linear and angular impulses:
     /// - In 2D, `impulse.xy()` gives the linear impulse, and `impulse.z` the angular impulse.
     /// - In 3D, `impulse.xyz()` gives the linear impulse, and `(impulse[3], impulse[4], impulse[5])` the angular impulse.
-    pub impulse: SpacialVector<f32>,
+    pub impulse: SpacialVector<Real>,
 }
 
 impl FixedJoint {
     /// Creates a new fixed joint from the frames of reference of both bodies.
-    pub fn new(local_anchor1: Isometry<f32>, local_anchor2: Isometry<f32>) -> Self {
+    pub fn new(local_anchor1: Isometry<Real>, local_anchor2: Isometry<Real>) -> Self {
         Self {
             local_anchor1,
             local_anchor2,