Switch Case | How, When and Why to use! Why use Switch Case instead of If statements! VIDEO TUTORIAL

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1

Hello!

In this video, we’re going to be discussing on how to use Switch Case and why to use them instead of If statements in some situations, depending on your instincts :slight_smile:

Got any feedback or constructive criticism about my improvement?
Or maybe a suggestion for tutorial video? Let me know, please :slight_smile:

2

@Sykoo ,
A use case from a Unity script…

I lifted this from the Bootcamp demo. I offer this up as a more concrete (no pun intended) implementation. In some sense, it is actually self explanatory. Note that it does include common conditional logic which is appropriate in this instance :

It is UnityScript and you could easily point out any differences :

#pragma strict
#pragma implicit
#pragma downcast

enum HitType
{
CONCRETE,
WOOD,
METAL,
OLD_METAL,
GLASS,
GENERIC
}

class BulletMarks extends MonoBehaviour
{
public var concrete : Texture2D[ ];
public var wood : Texture2D[ ];
public var metal : Texture2D[ ];
public var oldMetal : Texture2D[ ];
public var glass : Texture2D[ ];
public var generic : Texture2D[ ];

public function GenerateDecal(type : HitType, go : GameObject)
{
var useTexture : Texture2D;
var random : int;

switch(type)
{
case HitType.CONCRETE:
if(concrete == null) return;
if(concrete.Length == 0) return;

random = Random.Range(0, concrete.Length);

useTexture = concrete[random];
break;
case HitType.WOOD:
if(wood == null) return;
if(wood.Length == 0) return;

random = Random.Range(0, wood.Length);

useTexture = wood[random];
break;
case HitType.METAL:
if(metal == null) return;
if(metal.Length == 0) return;

random = Random.Range(0, metal.Length);

useTexture = metal[random];
break;
case HitType.OLD_METAL:
if(oldMetal == null) return;
if(oldMetal.Length == 0) return;

random = Random.Range(0, oldMetal.Length);

useTexture = oldMetal[random];
break;
case HitType.GLASS:
if(glass == null) return;
if(glass.Length == 0) return;

random = Random.Range(0, glass.Length);

useTexture = glass[random];
break;
case HitType.GENERIC:
if(generic == null) return;
if(generic.Length == 0) return;

random = Random.Range(0, generic.Length);

useTexture = generic[random];
break;
default:
if(wood == null) return;
if(wood.Length == 0) return;

random = Random.Range(0, wood.Length);

useTexture = wood[random];
return;
}

transform.Rotate(new Vector3(0, 0, Random.Range(-180.0, 180.0)));

Decal.dCount++;
var d : Decal = gameObject.GetComponent(“Decal”);
d.affectedObjects = new GameObject[1];
d.affectedObjects[0] = go;
d.decalMode = DecalMode.MESH_COLLIDER;
d.pushDistance = 0.009 + BulletMarkManager.Add(gameObject);
var m : Material = new Material(d.decalMaterial);
m.mainTexture = useTexture;
d.decalMaterial = m;
d.CalculateDecal();
d.transform.parent = go.transform;
}
}

3

Thank you very much for your example! :slight_smile:

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