diff --git a/app-proto/src/display.rs b/app-proto/src/display.rs
index 7e1d3a7..184b29e 100644
--- a/app-proto/src/display.rs
+++ b/app-proto/src/display.rs
@@ -318,16 +318,16 @@ pub fn Display() -> View {
                 let rep = state.assembly.elements.with_untracked(
                     |elts| elts[sel].representation.get_clone_untracked()
                 );
-                let vel_field_z = DMatrix::from_column_slice(5, 5, &[
-                    0.0, 0.0, 0.0, 0.0, 0.0,
-                    0.0, 0.0, 0.0, 0.0, 0.0,
+                let vel_field_x = DMatrix::from_column_slice(5, 5, &[
                     0.0, 0.0, 0.0, 0.0, 1.0,
-                    0.0, 0.0, 2.0, 0.0, 0.0,
+                    0.0, 0.0, 0.0, 0.0, 0.0,
+                    0.0, 0.0, 0.0, 0.0, 0.0,
+                    2.0, 0.0, 0.0, 0.0, 0.0,
                     0.0, 0.0, 0.0, 0.0, 0.0
                 ]);
                 let translate_x = translate_pos_x_val - translate_neg_x_val;
                 if translate_x != 0.0 {
-                    let vel = translate_x * vel_field_z * rep;
+                    let vel = translate_x * vel_field_x * rep;
                     let elt_motion: DVector<f64> = time_step * TRANSLATION_SPEED * vel;
                     assembly_for_raf.deform(vec![(sel, elt_motion.as_view())]);
                     scene_changed.set(true);