Why particles create visual effects in Unity - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start the particle system.

Unity

ParticleSystem ps = GetComponent<ParticleSystem>();
ps.[1]();

Drag options to blanks, or click blank then click option'

APlay

BClear

CPause

DStop

Attempts:

3 left

💡 Hint

Common Mistakes

Using Stop() instead of Play() will not start the particles.

Pause() only pauses the system, it does not start it.

Clear() removes particles but does not start the system.

The Play() method starts the particle system, making the particles visible and active.

2fill in blank

medium

Complete the code to set the particle system's emission rate.

Unity

var emission = ps.emission;
emission.rateOverTime = [1]f;

Drag options to blanks, or click blank then click option'

A0

B100

C10

D1000

Attempts:

3 left

💡 Hint

Common Mistakes

Setting rate to 0 means no particles emit.

Setting rate too high can cause performance issues.

Setting rateOverTime to 100f means 100 particles emit per second, creating a visible effect.

3fill in blank

hard

Fix the error in the code to change particle color.

Unity

var main = ps.main;
main.startColor = [1];

Drag options to blanks, or click blank then click option'

AColor.red

Bcolor.red

CRed

Dcolor.Red

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase 'color' causes a compile error.

Using 'Red' without 'Color.' is undefined.

Color.red is the correct way to specify the red color in Unity's API.

4fill in blank

hard

Fill both blanks to create a particle system that emits particles only when active and stops otherwise.

Unity

if (isActive) {
    ps.[1]();
} else {
    ps.[2]();
}

Drag options to blanks, or click blank then click option'

APlay

BStop

CPause

DClear

Attempts:

3 left

💡 Hint

Common Mistakes

Using Pause() does not fully stop emission.

Using Clear() removes particles but does not control emission.

Use Play() to start emitting particles and Stop() to stop emitting when inactive.

5fill in blank

hard

Fill all three blanks to create a dictionary mapping particle names to their sizes, filtering only large particles.

Unity

var sizes = new Dictionary<string, float> {
    {"Spark", 0.5f},
    {"Flame", 1.2f},
    {"Smoke", 2.0f}
};
var largeParticles = sizes.Where(kv => kv.Value [1] [2]).ToDictionary(kv => kv.Key, kv => kv.Value [3] 1);

Drag options to blanks, or click blank then click option'

A>

B1

C+

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' filters small particles instead of large.

Using '-' instead of '+' changes the size incorrectly.

This code filters particles with size greater than 1 and adds 1 to their size in the new dictionary.