1 files changed, 6 insertions, 4 deletions
diff --git a/physics.h b/physics.h
index 0a92118..5a9a8d0 100644
--- a/physics.h
+++ b/physics.h
@@ -96,9 +96,9 @@ typedef struct {
 /*
 	physics joint fields meaning changes depending on their context.
 
-	anchor_a/axis_a are local to body_a.
-	anchor_b/axis_b are local to body_b.
-	axes should be normalized.
+	anchor_a/frame_rot_a define the joint frame local to body_a.
+	anchor_b/frame_rot_b define the joint frame local to body_b.
+	frame rotations are normalized quaternions.
 
 	lower/upper are generic limits
 	- revolute: radians
@@ -129,7 +129,8 @@ typedef struct {
 	Flags32 flags;
 
 	Vec3 anchor_a, anchor_b;
-	Vec3 axis_a, axis_b;
+	Quaternion frame_rot_a, frame_rot_b;
+	// Vec3 axis_a, axis_b;
 
 	f32 lower, upper;
 	f32 spring_hz, spring_damping;
@@ -137,6 +138,7 @@ typedef struct {
 } PhysicsJoint;
 
 typedef struct {
+	u64 entity_id;
 	b3BodyId id;
 	b3ShapeId *shapes; // count is stored in PhysicsCmp
 } PhysicsBodyRuntime;