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‫In this video, you will learn about the different collider types in unity.

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‫As you have already seen in the presentation, there are different kinds of colliders and we already

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‫have worked with two different collider types or actually even three.

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‫So now let's have a look at those collider types.

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‫For example, our player has a Sphere Collider, you can see that here.

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‫So let's go to our player here.

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‫And as you can see, there is this greenish line that you have around the player or around this circle,

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‫and that is our sphere.

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‫Collider It already has gotten automatically a radius of 0.5, which fits the size of our player.

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‫So if I change that to, for example, one, my Sphere Collider will be bigger than the actual graphic

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‫that we can see here.

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‫So let's activate gravity for our player and let's run the game just to see what happens.

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‫Now let's go back.

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‫Let's go into the scene view here.

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‫And as you can see, our ball is on top of the ground.

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‫So it flies around.

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‫It looks as if it flies, but in the end it has to do with the Sphere Collider Because the.

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‫Sphere Collider So our ball collider that you can see here collides with the underground, which has

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‫a mesh collider So that's already the second type of colliders.

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‫This one has a different type of look and it's based on its mesh.

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‫And you can find the mesh by clicking on the mesh here.

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‫And you can see here at the bottom right side, this is the looks of the mesh and that can be very specific.

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‫It can be based on the character.

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‫For example, if your character is a car, then the mesh could be the whole surface of the car.

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‫Mesh is used for surfaces and the mesh collider gives the surfaces a collider.

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‫All right.

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‫So our underground, for example, here has a mesh collider.

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‫From the bottom.

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‫You can see that there is nothing.

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‫And from the top, it has this green color.

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‫So we gave it this green color only from the top.

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‫Now, if we want to have a higher layer for the collider of our mesh collider, we can add convex what

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‫it does.

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‫As you can see now, it has a collider towards the top and towards the bottom of its actual surface

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‫and you can even inflate that.

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‫So if you want to inflate it and make it bigger, you can go ahead and inflate the the collider of our

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‫mesh or of our on the ground.

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‫So if you have a look now, now our ball will be even higher.

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‫So now it's on top of this physics piece.

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‫So if we go ahead and reduce the radius of oh to 0.5, our ball will still be on top of this physics

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‫collider.

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‫So the colliders don't have to be the same size as the objects themselves, but it does of course make

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‫sense to have that in most games.

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‫Maybe your game type is exactly so that it doesn't fit well with each other.

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‫Then you can of course change that.

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‫What you also can do is you can change the center of your collider, at least in this case.

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‫So, for example, the center of my collider could be, let's say, one higher than my ball itself.

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‫So now if we look at it, the Y position is at one.

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‫So now our ball is inside of our underground.

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‫And at the same time, as you can see now, that's how it looks out moves now.

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‫And the physics themselves, they move as intended.

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‫All right.

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‫So it just looks so weird because the radius is bigger and the position of the center is different.

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‫So 000 is the center point of our sphere.

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‫And well, if we change any of that, we'll change the center of the collider.

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‫Now, let's go back to 0.5.

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‫Let's set that back because that's the standard.

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‫Collider Well, that's the sphere.

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‫Collider Let's have a quick look at some other colliders, for example, the Capsule Collider So that

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‫one is our capsule collider And as you can see, it has the form of a capsule and it also has the attributes

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‫of center, it has a radius and it has a height, and you can even change the axis towards which you

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‫want to.

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‫Collider To be.

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‫So y axis is going up, x axis is going to decide, as you can see here, and z axis is going towards

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‫the other side, as you can see here now.

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‫All right.

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‫So let's put that back to y axis because the standard and now what I want to do is start my game.

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‫So I'm going to start the player here.

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‫So now let's try to hit that collider here and make it fall off because now it does have a collider.

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‫So let's see.

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‫And as you can see, it doesn't do anything.

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‫We can't hit it off.

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‫Why is that?

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‫Is it so strong?

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‫Is it so powerful now?

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‫It has to do with, well, maybe you can figure it out.

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‫Just try to think of it.

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‫What could it be?

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‫All right.

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‫Yeah, it's lacking a rigid body.

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‫So let's add a physics rigid body to our capsule.

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‫And now let's try to hit it with our ball and see what happens.

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‫So let's hit it.

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‫Boom.

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‫And we see it falls off.

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‫So it automatically gets the physics.

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‫And you could use that in order to create a bowling game or a domino game or something like that.

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‫All right.

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‫Next, there is a box collider, so let's create a cube.

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‫And as you can see, the cube has a greenish line here as well.

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‫That is the box.

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‫Collider And you can change the size of the box collider as you can see now I changed the X position

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‫to two or an exercise to do.

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‫You can do that for Y and for Z as well.

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‫So you can make the collider bigger than the actual box itself, as you can see.

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‫And of course the center could also be moved.

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‫So now you could move it to one so that it's higher or that it's at the center pretty much of our cube,

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‫and you can even put it on top of the cube.

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‫So now the cube will fall through, but at the same time, it will still be here.

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‫It will still hang at the bottom of our plane.

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‫Yeah.

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‫So let's add a physics body to that.

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‫Otherwise it won't see it.

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‫Let's add a rigid body, as you can see now.

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‫So now our cube is at the bottom.

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‫Well, actually, the graphics are at the bottom, but the physics themselves are on top of our plane.

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‫All right, then there's one more thing that I would like to show you.

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‫And I'm going to delete my cube and I'm going to delete the capsule as well.

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‫But I'm going to keep the player and I'm going to put it towards the bottom as well.

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‫So now let's say we want to have an underground which is bouncy, actually, let's put the ball up again.

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‫If I want to have an underground that is bouncy.

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‫So let's say this is a huge bouncy on the ground here.

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‫What we need to do is to add a material.

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‫So here you can see that our mesh collider from underground doesn't have any material yet and we can

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‫create a new material.

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‫So let's go to assets create and then it's called physics material.

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‫So you can find physics material.

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‫It's open that up and let's call that bouncy ground.

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‫And that bouncy ground has a dynamic friction, a static friction, a bouncy ness.

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‫And you can combine fractions here so you can multiply frictions and multiply bounce units based on

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‫the objects that collide with each other or that touch each other.

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‫So let's get rid of the friction.

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‫So let's set those to zero and let's add a bouncy ness of one.

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‫So the value of bouncing this is between zero and one.

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‫Usually bouncy ness of one means that it will bounce back with the same force that it came with.

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‫So if we have a look at it now, actually, let's save that with that, with those values, go to the

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‫underground and now let's drag our bounce ground as it's material or let's choose it.

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‫Here you can see you can choose bounce ground and let's start it.

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‫And now you will see our ball bounces and the ball bounces off again.

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‫Now why doesn't it bounce back the same way?

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‫Let's add the bouncing is to the player as well.

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‫So let's add this physics material to the player.

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‫And let's have a look.

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‫Now it will bounce the same height before it didn't because it was influenced by the unbound thickness

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‫of our ball.

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‫And now actually, based on the settings that you have set up for the multiplier, it will bounce even

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‫higher and higher every single time that it bounces.

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‫So if we have a look at bounce ground, it has a bounce index of one and the friction combine is average

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‫and the bounce combined is average as well.

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‫If we now multiply, which is multiplied, they will multiply with each other and they will go even

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‫faster and higher.

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‫So that's how bounce in his works.

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‫You can use bounce illness to bounce off of something that's great.

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‫For example, for our pong game we will use bounce in is there.

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‫Now let's have a look at friction.

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‫So let's.

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‫Delete the bounce ground from our player.

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‫So let's go to none here and let's add a friction to the ground itself.

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‫So the on the ground has our bouncy ground yet or still.

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‫So let's rename that bounce and or bouncy and friction or fricative ground.

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‫I think that's the right term.

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‫So now let's add a friction as well, a dynamic and a static friction.

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‫Now let's start it off.

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‫So we have a friction of one static and dynamic and now let's have a look what happens.

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‫So our ball falls off and now if I move it, it will be reduced.

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‫So the speed of it will be reduced a little bit.

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‫Let's add a physics body to our player as well now.

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‫So let's add it back to our player and let's have a look now.

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‫So they both have a friction of one while they actually have a bounce in us as well.

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‫Actually, our ball has a bounce in this.

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‫Or both of them have a bond.

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‫And so let's put that to zero.

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‫So they won't bounce anymore, but they will still have the friction.

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‫So now we can barely see it here because our ball has a specific speed.

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‫But what it does, it will reduce the tempo of our ball.

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‫So it's like you can imagine it like asphalt in comparison to a very slippery ground.

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‫So if we have no friction, then it's like a slippery ground.

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‫If you have friction of one, that means that you have a very raw ground which is rough and which will

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‫slow down our game object.

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‫All right.

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‫So that's about the colliders.

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‫So whenever you want to add a collider to an object, you can do that.

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‫And as you can see, it will change the behavior of it.

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‫So now let's save the scene and see you in the next video where we'll have a look at triggers.