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Welcome back, my fellow game developers.

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In this video, we've added a Trail Renderer to our bullet.

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I'm going to make it a bit exaggerated so you can

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see clearly what's happening when we run our game.

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When we shoot our bullet.

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There you go.

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You can see that it has some kind of trailed behind it.

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I'm going to make it a bit bigger.

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So you clearly see what's going on.

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I shoot a bullet.

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Well, there you go.

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You can see our cool looking trail,

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the trails behind the bullet.

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Actually it's not perfect.

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It's not that nice.

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But I left the creativity part to you because while I know myself,

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I'm not that creative with that said,

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let's not waste any more time.

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We fix a small problem that we had,

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but we didn't see before maybe you've

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noticed it and thought moon, Michael forgot something.

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What is E such a burden structs you.

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No, no, I'm kidding. That's not waste any more time and let's get started.

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Okay, so we want to add a small trail behind our bullet as it flies through space.

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How are we going to do this?

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It's actually very simple.

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We are simply going to go into the player bullet.

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And in here we can add a component which is the Trail Renderer.

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So when we click on it,

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you can see that we can add a trail.

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How are we going to be testing this trail?

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As we are going to double-click on the prefab,

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open it up in here and see what we can do.

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So first of all,

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I don't know all the elements in here.

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You can play around everything.

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You can see that one of the things that we have as the sorting layer.

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So we can choose whether it's a bullet,

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whether it's a player with whatever you want,

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I'm going to choose both.

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So how do we see the trail?

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We simply take our bullet and we start moving it around.

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So right now, this is the trail that we have.

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Yep. I know it's not that good.

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What are we going to do about?

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The first thing I want to do is I want to change the material.

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So whenever in unity you have this pink thing behind you,

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that means that there is something wrong with the material.

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So I'm going to scroll down,

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find where we have material if I remove it completely,

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you'll see that we no longer have any trail.

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You can add multiple types of material in here.

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By the way, there are a lot and there are things that

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you can import into Unity such as rock,

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such as, I don't know,

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lightning or anything you want.

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So for example, we can add this dark some kind of dark material.

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I don't know what that is.

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It's one of the default materials that we have.

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I'm just going to use we can use,

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for example, the default particle system.

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So it looks as if there is a smoke trail behind it, which is not bad.

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I might keep it. And by the way, I'm just having fun.

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I'm not sure what we're going to do.

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And let's see what can we do?

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And you can see this trail is kind of weird.

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Anyways.

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The next thing I want to do is I want to change the width of this trail so you can

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see that I can increase it or decrease it as we move through space.

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And we can also add another point right here.

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So for example, you can start it as being

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thick and then having this little trail at the end,

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so it becomes smaller as we move forward.

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And let's see what else do we have in this particle?

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We can add this type of particles,

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this type of materials actually.

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Okay, nice, not bad.

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You can add this, a normal sprite.

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And what this does is we can actually change the color.

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And here you can do with even to have blend or fixed colors.

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So 11, single color or a blend of colors.

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So you can choose, for example, here,

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the first color should be,

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let's make it around red almost.

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And the end color should be maybe white.

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Okay, So now you'll notice that as we move,

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we have at the beginning read and then right here at the end we have a white color.

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You can change the width.

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So for example, you can see right here that it's a bit big for the bullet and

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this is how the boat will be moving because it's only moving in the right direction.

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So let's make it a bit smaller, thinner.

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There we go.

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So now we have this little trail as we move through space.

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Let's see how that will look. Okay?

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And another problem is the time.

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So if we hover over it,

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how long will the tail B?

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So it's five seconds.

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I don't think five as something we want.

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I think one we'll do enough,

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maybe even less. So there you go.

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This is the trail.

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I think even 0.5 will be enough.

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So there you go.

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Get me the bullet.

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Remove.

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This will be our trail behind the bullet.

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Actually white and not that good of a color.

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I'm just going to choose some kind of orange,

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yellow, something like that.

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Let's see.

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There we go. So I think it looks good enough.

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Maybe I would like to make it a bit thinner.

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Just a little bit thinner.

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And let's try a different material just for fun.

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See how that looks.

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Nice. Not bad, I think.

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No, no, Actually, no, I don't like it.

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Maybe I should make it a bit thicker.

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We can increase the thickness at the end.

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So it's why that the beginning,

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as you can see and then it's very small.

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You can play around tested how much you want to add,

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thickness you can even change right here,

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you can see that it starts off low goes up.

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You can add another point of inflection right here.

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So for example, like that.

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Remember when we were doing the animations.

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So there you go.

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This kind of fox tail behind.

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Look how cool that is.

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You can create a lot of nice effects using

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trail if you have the time to test all of this out,

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just going to delete this.

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And let's make it normal again.

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So there you go.

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This is our trail.

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Actually, the last one was was much better honesty,

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but no worries about that for now, Let's see what.

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You can also change the shadows.

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You can have auto destruct.

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There is a lot,

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a lot of things that you can play around with.

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You can go into Unity's documentation and check everything out,

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see what other options you have.

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For example, the probes,

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camera motion, something like that.

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I'm not sure.

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Sure.

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So I'm going to save this.

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I'm going to go back into our game and let's see if we have a good trail.

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So when I shoot the bullet,

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you can see I have a small trail behind it.

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It's not that good.

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It's not the way I would like it to be.

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But you can see it's just a small trail behind.

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So wait for the bullets to be destroyed.

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Try this again. And if you've noticed there is not one bullet,

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there are two bullets right here.

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And why is that?

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What do you think the problem isn't here?

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And the reason that we have two bullets is

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because if we go back into our script right here,

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you'll notice that if we press the mouse button during a frame or if we keep pressing it,

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we our instantiating a bullet.

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So in order to fix this,

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we are going to give the option to the player to choose whether this

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is going to be an automatic or not an automatic weapon.

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Now, I will remind you that this will be moved to

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another script because we don't want to handle this in the player script.

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We will delve deeper into why.

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Because let me just tell you from now,

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because having an automatic weapon is not the player controller job.

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It should be on a different script.

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But for now, let's just fix this problem.

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I'm going to create a serialized field which will be of type Boolean.

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And I'm going to call it is weapon auto magic.

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So if the weapon is automatic,

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we are going to change the conditions.

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So if the weapon is not automatic and we press the most button down,

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we will immediately instantiate.

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So just like we had the or which script,

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I'm not sure, was it the script?

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Which script that we add an or?

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Or we haven't all, okay,

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so we have the end.

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What does this symbol mean?

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Let me just finish.

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Is weapon automatic?

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And just like we've said previously,

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when we have an exclamation mark,

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this means that if this one,

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if the weapon is automatic,

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this whole condition will be false.

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So if is automatic is true,

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this exclamation mark behind that makes it false.

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But that understood this n means both conditions need to be true in order to instantiate.

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So what do we have here?

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If the weapon is not automatic with the exclamation mark,

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if the weapon is not automatically,

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this whole condition becomes true. Why is that?

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Because if the weapon is not automatic,

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this is automatic by itself without the exclamation mark is false.

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With the exclamation mark, it becomes true.

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And if we are pressing the button,

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we instantiate the bullet immediately.

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And if the we are holding down the button and the weapon is automatic,

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then we are going to have our shot counter.

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Let me do this again.

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And actually let me go ahead and print in here in the debug dot log.

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If the exclamation mark is automatic.

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So you can see for yourself, save that.

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So again, what's happening in here?

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We can go right now and choose whether a weapon is automatic or not.

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How does this help us if the weapon is automatic?

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And these two symbols right here,

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and we are holding down the mouse button.

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We will have the shot counter and we will have

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shooting constantly depending on the time between the shots.

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But if the weapon or the weapon is not automatic,

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that means the weapon automatic is false.

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Which means when we add an exclamation mark behind it,

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it makes it true.

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So this entire condition right here is true and we are hitting

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the mouse button once we instantiate immediately without any delay between them.

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And we also have this to display to make sure you

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understand how the exclamation mark works.

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You can see right here exclamation mark automatic.

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Back in our game.

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We run our game.

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You'll notice console, there we go.

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This is a small error.

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Don't worry about it.

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I'm going to clear this and you can see that it's false.

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False, false wild is automatic, is true.

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When I turn it off,

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you can see it becomes true.

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You can see the messages being sent right here collapsed upon each other.

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So now, if I don't have a weapon automatic as false,

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if I hold down the mouse button,

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you can see that I only shoot once.

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If I have it on automatic,

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I hold down the mouse button.

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I have a lot of shots.

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And the great thing about this is just wait for the bullets to all be destroyed.

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Now when I press the button,

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once, there you go,

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we only have one bullet.

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So we fixed the problem of having a magic bullet will save that if you want,

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we can adjust the trail.

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I just did it a bit fast.

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Have your time, have fun,

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enjoy creating some weird trail with a lot of colors and so on.

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And I believe this is the last video in this section,

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and the next section,

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we are going to be setting up the enemies that we want to kill.

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Because what's the point of having bullets if we don't have anybody to kill them with.

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So make sure to always commit your changes.

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00:12:41,180 --> 00:12:44,790
And I'll see you in the next video.