diff --git a/src/integer.rs b/src/integer.rs
index 965739a..55ba7ae 100644
--- a/src/integer.rs
+++ b/src/integer.rs
@@ -179,7 +179,7 @@ pub struct Unit64Mat3{
 
 
 ///[-1.0,1.0] = [-2^32,2^32]
-#[derive(Clone,Copy)]
+#[derive(Clone,Copy,Hash)]
 pub struct Planar64(i64);
 impl Planar64{
 	pub const ONE:Self=Self(2<<32);
@@ -221,7 +221,7 @@ impl std::ops::Div<i64> for Planar64{
 
 
 ///[-1.0,1.0] = [-2^32,2^32]
-#[derive(Clone,Copy)]
+#[derive(Clone,Copy,Hash)]
 pub struct Planar64Vec3(glam::I64Vec3);
 impl Planar64Vec3{
 	pub fn new(x:i32,y:i32,z:i32)->Self{
diff --git a/src/physics.rs b/src/physics.rs
index 2ac74e8..125ef78 100644
--- a/src/physics.rs
+++ b/src/physics.rs
@@ -49,32 +49,13 @@ pub enum InputInstruction {
 		//for interpolation / networking / playback reasons, most playback heads will always want
 		//to be 1 instruction ahead to generate the next state for interpolation.
 }
-#[derive(Clone)]
+#[derive(Clone,Hash)]
 pub struct Body {
 	position: Planar64Vec3,//I64 where 2^32 = 1 u
 	velocity: Planar64Vec3,//I64 where 2^32 = 1 u/s
 	acceleration: Planar64Vec3,//I64 where 2^32 = 1 u/s/s
 	time: TIME,//nanoseconds x xxxxD!
 }
-trait MyHash{
-	fn hash(&self) -> u64;
-}
-impl MyHash for Body {
-	fn hash(&self) -> u64 {
-		let mut hasher=std::collections::hash_map::DefaultHasher::new();
-		for &el in self.position.as_ref().iter() {
-			std::hash::Hasher::write(&mut hasher, el.to_ne_bytes().as_slice());
-		}
-		for &el in self.velocity.as_ref().iter() {
-			std::hash::Hasher::write(&mut hasher, el.to_ne_bytes().as_slice());
-		}
-		for &el in self.acceleration.as_ref().iter() {
-			 std::hash::Hasher::write(&mut hasher, el.to_ne_bytes().as_slice());
-		}
-		std::hash::Hasher::write(&mut hasher, self.time.to_ne_bytes().as_slice());
-		return std::hash::Hasher::finish(&hasher);//hash check to see if walk target is valid
-	}
-}
 
 pub enum MoveRestriction {
 	Air,