Challenge 2: Movement vector

Write C# code that builds a movement vector from keyboard input.

Challenge 2: Movement vector

In 3D games, character and object motion is represented via the Vector3 data structure encompassing X, Y, and Z axes. Horizontal and vertical inputs combine to produce a directional vector.

// Converting input axes into a Vector3 movement vector
float h = 1.0f;
float v = 0.0f;
Vector3 direction = new Vector3(h, 0f, v);

Multiplying this directional vector by a speed factor yields the object's physical translation.

Exercise Print axis coordinates

Define x = 1, y = 0, z = 0 variables. Print Direction: (1, 0, 0) to the console.

Show example solution

using System;

class Program
{
    static void Main()
    {
        int x = 1;
        int y = 0;
        int z = 0;
        Console.WriteLine("Direction: (" + x + ", " + y + ", " + z + ")");
    }
}

Exercise Print movement and velocity info

Assign "Forward" to direction and 5 to velocity. Print Movement: Forward | Velocity: 5 to the console.

Show example solution

using System;

class Program
{
    static void Main()
    {
        string direction = "Forward";
        int velocity = 5;
        Console.WriteLine("Movement: " + direction + " | Velocity: " + velocity);
    }
}

Test yourself

Which data type is used in Unity to hold position and direction calculations in 3D space?
- Vector3
- MatrixSingle
- EulerAngle
- Quaternion2D
Show answer

Vector3 — Vector3 is the foundational Unity structure representing 3D coordinates and directions across X, Y, and Z.

Instantiate movement vector

Vector3 movement = new ____(horizontal, 0f, vertical);

Show answer

Vector3 movement = new Vector3(horizontal, 0f, vertical);

Movement vector concepts

Vector3

3D position/direction vector (X,Y,Z)
Input

Axis signals from keyboard/gamepad
Velocity

Direction multiplied by speed value
Horizontal Axis

Left/right horizontal movement input

Next lesson: Challenge 3: Godot ready

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