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Step One – Find A Model

The first step in making your own character for VR chat is to choose your 3D model to be used as a base.

If you have the necessary facilities and skills to create your own model, then you can certainly go ahead and do so.

If however, you want to skip this step and work on a 3D model that already exists, then the platform we would recommend for this is the Unity Asset Store. And there is a good reason for this recommendation. 3D models from the Unity Asset Store come fully rigged, and thus are very easy to upload directly onto the VRchat platform.

It’s important to note at this point that you will need a license to use your chosen model, and that the model falls below 70,000 triangles.

Step Two – Get the model into your assets folder

The next step is to import your chosen model into your assets folder on VRchat (more on this later).

Then you will need to ensure that it has the correct settings. To do this, you simply look under the rig tab in the inspector to ensure that the animation type is set to humanoid.

Step Three – Get the model into a scene

The next step is to drag your model either into your hierarchy or into a scene. Our recommendation is to only have one scene per avatar, and to place it at 0,0,0. If necessary, rotate the avatar so that it’s upright.

The avatar shouldn’t be too small, and it should not be any bigger than 5 x 5 x 5 meters.

Step Four – Add an avatar descriptor

Your next step is to set the viewing position of the avatar. Then you need to set the animation set which best suits your avatar. Then if you wish you can set up lip sync so that the avatar’s mouth moves as you talk.

Banker's algorithm is a deadlock avoidance algorithm. It is named so because this algorithm is used in banking systems to determine whether a loan can be granted or not.

Consider there are n account holders in a bank and the sum of the money in all of their accounts is S. Every time a loan has to be granted by the bank, it subtracts the loan amount from the total money the bank has. Then it checks if that difference is greater than S. It is done because, only then, the bank would have enough money even if all the n account holders draw all their money at once.

Banker's algorithm works in a similar way in computers.

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The characteristics of Banker's algorithm are as follows:

Let us assume that there are n processes and m resource types.

Some data structures that are used to implement the banker's algorithm are:

It is an array of length m. It represents the number of available resources of each type. If Available = k, then there are k instances available, of resource type Rj.

It is an n x m matrix which represents the maximum number of instances of each resource that a process can request. If Max = k, then the process Pi can request atmost k instances of resource type Rj.

It is an n x m matrix which represents the number of resources of each type currently allocated to each process. If Allocation = k, then process Pi is currently allocated k instances of resource type Rj.

It is a two-dimensional array. It is an n x m matrix which indicates the remaining resource needs of each process. If Need = k, then process Pi may need k more instances of resource type Rj to complete its task.

A safety algorithm is an algorithm used to find whether or not a system is in its safe state. The algorithm is as follows:

This algorithm may require an order of mxn² operations in order to determine whether a state is safe or not.

Now the next algorithm is a resource-request algorithm and it is mainly used to determine whether requests can be safely granted or not.

Let Requesti be the request vector for the process Pi. If Requesti==k, then process Pi wants k instance of Resource type Rj.When a request for resources is made by the process Pi, the following are the actions that will be taken:

1. If Requesti <= Needi, then go to step 2;else raise an error condition, since the process has exceeded its maximum claim.

2.If Requesti <= Availablei then go to step 3; else Pi must have to wait as resources are not available.

3.Now we will assume that resources are assigned to process Pi and thus perform the following steps:

Available= Available-Requesti;

Allocationi=Allocationi +Requesti;

Needi =Needi - Requesti;

If the resulting resource allocation state comes out to be safe, then the transaction is completed and, process Pi is allocated its resources. But in this case, if the new state is unsafe, then Pi waits for Requesti, and the old resource-allocation state is restored.

Some disadvantages of this algorithm are as follows:

Now its time to take a look at the Example of Banker's Algorithm:

Example:

Let us consider the following snapshot for understanding the banker's algorithm:

Solution:

1. The Content of the need matrix can be calculated by using the formula given below:

Need = Max – Allocation

2. Let us now check for the safe state.

Safe sequence:

Available = (2, 1, 0)

Need <=Available = False

So, the system will move to the next process.

2. For Process P1, Need = (1, 1, 0)

Available = (2, 1, 0)

Need <= Available = True

Request of P1 is granted.

Available = Available +Allocation

= (2, 1, 0) + (2, 1, 2)

= (4, 2, 2) (New Available)

3. For Process P2, Need = (5, 0, 1)

Available = (4, 2, 2)

Need <=Available = False

So, the system will move to the next process.

4. For Process P3, Need = (7, 3, 3)

Available = (4, 2, 2)

Need <=Available = False

So, the system will move to the next process.

5. For Process P4, Need = (0, 0, 0)

Available = (4, 2, 2)

Need <= Available = True

Request of P4 is granted.

Available = Available + Allocation

= (4, 2, 2) + (1, 1, 2)

= (5, 3, 4) now, (New Available)

6. Now again check for Process P2, Need = (5, 0, 1)

Available = (5, 3, 4)

Need <= Available = True

Request of P2 is granted.

Available = Available + Allocation

= (5, 3, 4) + (4, 0, 1)

= (9, 3, 5) now, (New Available)

7. Now again check for Process P3, Need = (7, 3, 3)

Available = (9, 3, 5)

Need <=Available = True

The request for P3 is granted.

Available = Available +Allocation

= (9, 3, 5) + (0, 2, 0) = (9, 5, 5)

8. Now again check for Process P0, = Need (3, 2, 1)

= Available (9, 5, 5)

Need <= Available = True

So, the request will be granted to P0.

Safe sequence: < P1, P4, P2, P3, P0>

The system allocates all the needed resources to each process. So, we can say that the system is in a safe state.

3. The total amount of resources will be calculated by the following formula:

The total amount of resources= sum of columns of allocation + Available

= + =

Given below is the code for Banker's algorithm implementation:

Here is the output of the above program:

With this we end the banker's algorithm tutorial. We hope you understood it, if not go to our forum and ask your doubt.