Increase ulps in the angle_between test

Author: Limeth

src/util.rs

@@ -87,7 +87,7 @@ macro_rules! assert_eq_ulps {
         assert!($a.approx_eq_ulps(&$b, $ulps),
                 "assertion failed: `(left !== right)` \
                            (left: `{:?}`, right: `{:?}`, expect ulps: `{:?}`, real ulps: `{:?}`)",
-                 $a, $b, $ulps, $a.ulps(&$b));
+                 $a, $b, $ulps, $a.ulps(&$b).abs());
     })  
 }
 
@@ -1016,28 +1016,28 @@ mod tests {
                 &Vector3::new(0.0, 1.0, 0.0)
             ),
             <f32 as BaseFloat>::frac_pi_2(),
-            1
+            2
         }
         assert_eq_ulps! {
             Vector3::new(1.0, 0.0, 0.0).angle_between(
                 &Vector3::new(1.0, 1.0, 0.0)
             ),
             <f32 as BaseFloat>::frac_pi_4(),
-            1
+            2
         }
         assert_eq_ulps! {
             Vector3::new(1.0, 0.0, 0.0).angle_between(
                 &Vector3::new(-1.0, 1.0, 0.0)
             ),
             <f32 as BaseFloat>::frac_pi_4() * 3.0,
-            1
+            2
         }
         assert_eq_ulps! {
             Vector3::new(1.0, 0.0, 0.0).angle_between(
                 &Vector3::new(-1.0, 0.0, 0.0)
             ),
             <f32 as BaseFloat>::pi(),
-            1
+            2
         }
     }