README.md

🎯 Practical Task: «Build a Robot from Components»

Goal

Learn to distinguish between a GameObject (container) and Components (behaviors/parts). Create a working object by adding and removing components.

Task

Part 1. Create an empty container

1. Open Unity (any 2020+ version)
2. In the Hierarchy window → Right-click → Create Empty
3. Name the object MyRobot
4. Look in the Inspector: what components are already there? (only Transform)

Part 2. Add visual behavior (components)

1. Select MyRobot
2. Click Add Component → Mesh Filter → choose Cube (or Sphere)
3. Add Mesh Renderer (if not added automatically)
4. Create a material: Right-click in Project → Create → Material, name it RobotMat, color it red
5. Drag RobotMat onto MyRobot (or assign it in Mesh Renderer → Element 0)

➡️ Now MyRobot is visible. But it doesn't move or interact.

Part 3. Add physics behavior

1. Add Component → Rigidbody
2. Add Component → Box Collider (automatically fits the cube's size)

➡️ Press Play. The object will fall down due to gravity. Stop the game.

Part 4. Add logical behavior (script)

1. Create a C# script: Right-click in Project → Create → C# Script, name it Rotator
2. Open the script (double-click) and write:

using UnityEngine;

public class Rotator : MonoBehaviour
{
    public float speed = 30f;

    void Update()
    {
        transform.Rotate(Vector3.up, speed * Time.deltaTime);
    }
}

3. Save the script. Drag it onto MyRobot in the Inspector (or onto the object in Hierarchy)

Part 5. Experiments (checking understanding)

Perform each step one by one and observe the result:

1. Disable Mesh Renderer (uncheck the box) → the object becomes invisible but still rotates (if Play is on) — because Rotator is still working.
2. Disable Rotator → rotation stops.
3. Remove Rigidbody (three dots → Remove Component) → gravity and physics are gone.
4. Create a second object (Create Empty → name it MyRobot2) and drag the existing Rotator script from the Project window onto it. It will also rotate.

Part 6. Answer the questions (verbally or as code comments)

• How many GameObjects are in the scene after Part 5? (hint: every object in Hierarchy is a GameObject)
• Can you add two identical Rigidbody components to one GameObject? (try it)
• What happens if you delete the Transform component?

✅ Success criteria: You can create an object, make it visible, physical, with rotation logic — and explain which part is the container (GameObject) and which are components.

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