change physics to use impulse instead of velocity

Assets/Src/ShipPhysics.cs

@@ -4,19 +4,18 @@ public class ShipPhysics : MonoBehaviour {
     ShipControls ship;
 
     float maxDmg = 150f;
+    float maxImpulse = 50f;
 
     void Awake() {
        ship = GetComponent<ShipControls>();
     }
 
     void OnCollisionEnter(Collision collision) {
-        // Debug-draw all contact points and normals
-        // foreach (ContactPoint contact in collision.contacts) {
-        //     Debug.DrawRay(contact.point, contact.normal, Color.white);
-        // }
+        Debug.Log($"mag {collision.relativeVelocity.magnitude}");
+        Debug.Log($"impulse {collision.impulse} {collision.impulse.magnitude}");
 
-        Debug.Log("mag" + collision.relativeVelocity.magnitude);
-        if (collision.relativeVelocity.magnitude > maxDmg) {
+        // if (collision.relativeVelocity.magnitude > maxDmg) {
+        if (collision.impulse.magnitude > maxImpulse) {
             Debug.Log("Ddddestroyed by" + collision.gameObject.name);
             ship.Respawn();
             return;

Assets/Src/UI/CrosshairComponents.cs

@@ -83,7 +83,7 @@ namespace CrosshairComponents {
             Vector2 leftArm = new Vector2(centre.x - angleSin * length, centre.y + angleSin * length);
 
             var painter = context.painter2D;
-            painter.lineWidth = 2.0f;
+            painter.lineWidth = 1.0f;
             painter.lineCap = LineCap.Butt;
             painter.strokeColor = m_TrackColor;
 
@@ -184,7 +184,7 @@ namespace CrosshairComponents {
             Vector2 bottomArm = new Vector2(centre.x, centre.y + length);
 
             var painter = context.painter2D;
-            painter.lineWidth = 2.0f;
+            painter.lineWidth = 1.0f;
             painter.lineCap = LineCap.Butt;
             painter.strokeColor = m_TrackColor;