Appendix

3.1 Introduction

It will provide useful tips and commands to work on unity.

3.2 3D GrameObjects

• Zooming:
  • After selecting any object press F to zoom
  • Use the scroll wheel or trackpad to get to a good distance.
• Orbit around view: Select object in Scene view then Hold Alt and left-click and drag with your mouse to orbit around the object.
• blocking the old input API (Input.GetKeyDown). It is not about physics or Rigidbody. It is only about input handling mismatch.
  1. Option 1: Enable BOTH input systems- Steps
  • Go to Edit → Project Settings
  • Click Player
  • Scroll to Other Settings
  • Find Active Input Handling
  • Change it to: Both
  • Click Apply to Restart Unity. You code should work

    if (Input.GetKeyDown(KeyCode.Space))
    {
      myRigidbody.velocity = Vector2.up * 10;
    }
    

1. Option 2: Use New Input System Properly- If you want to stay modern, replace your input code:
   • Add this at the top using UnityEngine.InputSystem;
   • update code to for using space bar key

     void Update()
     {
      if (Keyboard.current.spaceKey.wasPressedThisFrame)
      {
       myRigidbody.velocity = Vector2.up * 10;
      }
     }