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[MUSIC] 2

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Hello again, in this video, we're gonna do a little bit of tidying up of our code, 3

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and we're gonna implement a death particle effect when the attackers are smashed into 4

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oblivion. 5

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So let's start by opening our projectile script. 6

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We can see in here that we've got a variable for health, and 7

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we've got our health dealing damage. 8

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What I'm going to do is create another variable that allows us to have 9

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a mechanism to say what is the health, sorry, what is the attacker, I was looking 10

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at the one above, we've already got the health, Rick, what are you thinking? 11

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We want to be able to reference the attacker, and 12

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that's going to equal otherCollider.GetComponent< >, 13

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and what do we put within our angle brackets here? 14

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We put <Attacker>. 15

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You guessed it. 16

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Hopefully you guessed it. 17

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Yelling out at the screen randomly, attacker. 18

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Okay, so now that we have those two I'm gonna create an if statement 19

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here where I say if(attacker &&), so double ampersand, 20

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that's what that thingy is, the and sign is an ampersand. 21

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So &&, say that fast ten times, health. 22

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So that's saying that when we're colliding with something, 23

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if it has the attacker component, and it has the health component, 24

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if both of those are true, then we want to do something. 25

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What is it that we wanna do? 26

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Well, we want to do our health.DealDamage. 27

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That would be the first thing, and then also, I think what we want to do is 28

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destroy the projectile so that it's not hanging around. 29

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You could have it that when your enemy shoots, 30

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you have a slow projectile that goes through and does damage to everyone, 31

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one of those like rockets that cannot be destroyed, but for us, or for 32

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the zucchini I want it to hit and then to go away, I think that makes more sense. 33

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So, what do we type in here if we want to destroy the projectile? 34

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We type in Destroy(gameObject). 35

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So destroy our cell, save that up. 36

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So now, it should only be colliding with the correct things. 37

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We probably won't see much of a change, cuz it's not passing through any of 38

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the incorrect things, but we know that if there was another cactus in front of it, 39

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then it wouldn't bump into that point. 40

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Boink, there we go, we hit once, and we hit twice, and it's disappearing. 41

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Excelente! 42

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The moment of disappearing where the attacker is killed is a little bit bland, 43

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so we're gonna spruce that up a little bit by putting in a particle effect. 44

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And this where I've got a challenge for you is to create a nifty 45

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particle effect and to trigger that when the attacker is killed. 46

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So this is code that we've done before. 47

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It should be pretty straightforward for you to find where to put that code and 48

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say, how do I trigger this particle effect so that it happens, and 49

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if you don't wanna create a particle effect, then I've got one that I'm using. 50

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Just one of our other projects in this course that I can give to you as 51

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downloadable against this lecture. 52

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So you can grab that, if you like, as a asset pack or you can make your own. 53

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So jump in, take on that challenge. 54

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I'll see you back here when you've given it your best shot. 55

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Okay, let's go and grab that asset. 56

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So I've got ExplosionVFX. 57

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When I drag it in anywhere into my Assets folder it asks me whether I'd like 58

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to import. 59

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Yes, I import, and it brings in the folder structure as well, so 60

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I've got this VFX folder down here with the Explosion VFX, 61

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[LAUGH] which you might recognize from one of the other sections of the course. 62

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I've just gone and grabbed it. 63

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You can take plenty of time to finesse with your particle effect but 64

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I'm not gonna go through that in too much detail. 65

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I just wanted to get something that we could use for now. 66

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Let's just have a look, make sure it works. 67

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Boink, there we go. 68

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It's kind of stars going a bit crazy. 69

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Good enough. 70

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Job done. 71

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Okay, so let's go over into our health script. 72

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Above Destroy, we need a notion of calling a method where 73

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we're going to say TriggerDeathVFX(). 74

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Okay, we wanna trigger the VFX and then we want to destroy it ourselves, 75

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in this case it's destroying the lizard, and 76

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we want to make sure that the DeathVFX isn't destroyed as well. 77

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So that's a little bit trickier. 78

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This is why we need to instantiate, rather than just playing a VFX, 79

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rather than just playing a particle effect on, where's one of my lizards here? 80

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Prefab > Lizard, drag them into the scene so we put him there. 81

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So we could have as a child, we could have a particle effect under the lizard. 82

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But then when we destroy the lizard, we're also destroying the child, 83

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the particle effect underneath that. 84

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So we're create ourselves a private void TriggerDeathVFX. 85

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What do we want to do in here? 86

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Well, first of all I'm gonna say, if we don't have any VFX, then just return, 87

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just in case we forget to put something on there, 88

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we don't want something to break where it says, hey, 89

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trigger a particular particle effect and we've kind of forgotten. 90

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I know that you would never forget to do that, but 91

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I forget to do these things sometimes. 92

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So say, if there is no, what are we going to call this? 93

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We'll call this deathvfx, we're going to make that variable in a moment, 94

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then just return. 95

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Just go about your business, don't worry, don'tdon't stress about it. 96

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Unity, everything will be fine. 97

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So let's go and serialize ourselves a variable, 98

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[SerializeField] GameObject, cuz we want to be able to 99

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reference it as a GameObject in a moment, and it's a deathVFX. 100

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Okay, so now we have this notion of we're gonna drag in our deathVFX, 101

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that we just brought in, the explosion thing I had before. 102

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If it doesn't exist, if you don't have one of these then don't worry about it, 103

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just return it. 104

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Otherwise, what are we gonna do? 105

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Well, we'll start off just by saying, instantiate. 106

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Instantiate, what do we need to do here? 107

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Well, we're gonna instantiate(deathVFX, ). 108

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We've done this a bunch of times when instantiating. 109

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It should be pretty natural by now. 110

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And then where is it? 111

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It's transform.position. 112

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Had to think for a moment there. 113

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And then we can do transform.rotation, or we can do the quotidian.identity. 114

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I just like doing transform.rotation when it doesn't really matter what our 115

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rotation is, we're just putting it in there so that this instantiates happy, 116

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it's not confused saying what's the rotation, Rick? 117

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Okay, let's see how this goes, if this works. 118

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Jump back over, we need to create that reference. 119

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So on Lizard, we should now see, on our health script, 120

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we can see it's looking for deathVFX whereas my VFX, 121

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I will grab Explosion VFX, drag it on over into there. 122

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Click on play just to make sure that this works. 123

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He jumps out, shoot, bang, and one more time, shoot, bang, [SOUND]. 124

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Okay, we didn't get a VFX, why is that? 125

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Well let's go to our Explosion VFX, it's probably, 126

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if we scroll down down down to the renderer, we can see, if we look closely, 127

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the Order in Layer is 0, so we've gone through that before. 128

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I'll put this at 6 so it sits over the top of everything. 129

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That's right on the prefab, so that should be applied to what we're calling. 130

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Okay, we'll try this again. 131

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Okay, it's jumps out. 132

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[SOUND] You know what I'm gonna do? 133

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This has [LAUGH] been bugging me for awhile. 134

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I don't know, I haven't done this. 135

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I'm gonna click on my lizard. 136

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Go down, instead of 100 health, I'm gonna give you 30 health, so 137

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you get shot and killed. 138

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I'm gonna click apply, shot and killed with one shot. 139

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Now if we want to see how it works with multiple shots then we'll put that back up 140

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again, but for now. 141

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Kaboom, there we go, nice, and it created a particle effect. 142

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Let's have a look in here. 143

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We've got this Explosion VFX, now that's gonna 144

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stick around forever if we don't take care of it, so let's go take care of it. 145

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How do we take care of it? 146

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Well, we need to destroy the particle effect and 147

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this is why we're instantiating. 148

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Sorry, we're instantiating because the lizard gets destroyed, 149

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and this creates this whole new game object here, but we need a handle to it, 150

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we need a way of referring to this game object. 151

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So we'll create ourselves a GameObject type called deathVFXObject, 152

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and that's equal to what we've just instantiated. 153

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So now we have this notion of there's a deathVFXObject, 154

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so on our next line we can say Destroy(deathVFXObject), 155

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and we have the option of saying after how long. 156

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We don't wanna destroy it straight away, because we need to actually see 157

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the particle effects, so we'll say after a second. 158

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This is a little bit of a magic number in here, but I'm okay with that. 159

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We could put it to 10 and be super safe, but I'll leave it at 1. 160

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I'm pretty sure my particle effect is gonna be come and 161

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gone in one second no problem. 162

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So we'll make sure all that works and is hunky dory. 163

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Click on play, watch our hierarchy, lizard's being spawned, blump, 164

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explosion, and then the explosion went away. 165

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Now, if you look at it closely, I think, here we go, when it hits, 166

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when it strikes, boink, the particle effect is a little bit to the right. 167

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It looks a little bit off. 168

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It's all going pretty quick so you don't really notice it, but 169

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there's a few ways to solve this. 170

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For now, I'm going to be a little bit cheeky, okay, and for the [LAUGH] 171

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experienced programmers out there you're gonna be like,what are you doing? 172

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I'm gonna be a little bit cheeky and 173

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show you how I will move the particle effect as opposed to trying to 174

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reposition it on the lizard, or on the lizard's pivot point. 175

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So you see the pivot point there. 176

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Instead of trying to change where we instantiate it I'm just gonna change 177

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the particle effect a little bit. 178

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So forgive me on this that it's not perfect, but sometimes I think it's good 179

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to do these little tweaks so that we can keep on moving. 180

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So let's find our VFX > Explosion VFX, Drag one of those into the scene. 181

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You can see here is the particle effect. 182

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If we zoom in, this little symbol is showing it, and 183

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that represents where the middle of the particle effect is. 184

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If I scroll down on my particle effect, and find let's see, Shape, and on Shape, 185

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I've got position on my X coordinate, if I drag that over a little bit, 186

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you can see that this is where the origin, or the basis of the particle 187

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effect is gonna be, and this is where spawning the actual particle. 188

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So, if I click play, that's a little bit to the left. 189

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I know this is a little bit hacky, but I think this is a great quick solution to 190

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the fact that it's not quite lining up the way we want it to line up. 191

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Instead of having to go and mess around with the lizard, 192

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and the lizards animation we can do that later on. 193

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We'll tidy that later on, but this is just a quickie. 194

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We'll apply this back to the prefab. 195

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Just remove that from our scene. 196

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Let's have our lizard come walking in, walk, walk, walk, walk, and boink, 197

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that looked like it landed right over the top, so that's pretty good. 198

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Okay, as I said, it's not the best particle effect. 199

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Hopefully you've done something a little bit sharper than that, and also, 200

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if you've found that it's not spawning quite in the right place, 201

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I've given you a bit of a hint there on how you can tweak your particle effect. 202

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Okay, so that's all I wanted to do in this video, just tidying thing up and 203

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getting a little bit of a particle effect triggering. 204

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In the next video, we'll do, I'm not sure yet, something cool [LAUGH]. 205

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I'll see you in the next video.