Add UlpsEq trait bounds to fix compilation with git version of cgmath

Unless more changes are made to cgmath before 0.18 is released, this should make this library compatible with that version.

Author: nstoddard

src/algorithm/minkowski/gjk/mod.rs

@@ -9,6 +9,7 @@ use std::ops::{Neg, Range};
 use cgmath::BaseFloat;
 use cgmath::prelude::*;
 use cgmath::num_traits::NumCast;
+use cgmath::UlpsEq;
 
 use self::simplex::{Simplex, SimplexProcessor2, SimplexProcessor3};
 use crate::{CollisionStrategy, Contact};
@@ -109,7 +110,7 @@ where
         PL: Primitive<Point = P>,
         PR: Primitive<Point = P>,
         SP: SimplexProcessor<Point = P>,
-        P::Diff: Neg<Output = P::Diff> + InnerSpace + Zero + Array<Element = S>,
+        P::Diff: Neg<Output = P::Diff> + InnerSpace + Zero + Array<Element = S> + UlpsEq,
         TL: Transform<P>,
         TR: Transform<P>,
     {
@@ -277,7 +278,7 @@ where
         PL: Primitive<Point = P>,
         PR: Primitive<Point = P>,
         SP: SimplexProcessor<Point = P>,
-        P::Diff: Neg<Output = P::Diff> + InnerSpace + Zero + Array<Element = S>,
+        P::Diff: Neg<Output = P::Diff> + InnerSpace + Zero + Array<Element = S> + UlpsEq,
         TL: Transform<P>,
         TR: Transform<P>,
     {
@@ -365,7 +366,7 @@ where
     ) -> Option<Contact<P>>
     where
         P: EuclideanSpace<Scalar = S>,
-        P::Diff: Neg<Output = P::Diff> + InnerSpace + Zero + Array<Element = S>,
+        P::Diff: Neg<Output = P::Diff> + InnerSpace + Zero + Array<Element = S> + UlpsEq,
         PL: Primitive<Point = P>,
         PR: Primitive<Point = P>,
         TL: Transform<P>,
@@ -415,7 +416,7 @@ where
     ) -> Option<Contact<P>>
     where
         P: EuclideanSpace<Scalar = S>,
-        P::Diff: Neg<Output = P::Diff> + InnerSpace + Zero + Array<Element = S>,
+        P::Diff: Neg<Output = P::Diff> + InnerSpace + Zero + Array<Element = S> + UlpsEq,
         PL: Primitive<Point = P>,
         PR: Primitive<Point = P>,
         TL: Transform<P>,
@@ -479,7 +480,7 @@ where
     ) -> Option<S>
     where
         P: EuclideanSpace<Scalar = S>,
-        P::Diff: Neg<Output = P::Diff> + InnerSpace + Zero + Array<Element = S>,
+        P::Diff: Neg<Output = P::Diff> + InnerSpace + Zero + Array<Element = S> + UlpsEq,
         PL: Primitive<Point = P>,
         PR: Primitive<Point = P>,
         TL: Transform<P>,