ForgeAuthorativeMovement

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ForgeAuthorativeMovement

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An example implementation of authorative movement in Forge Networking Remastered.

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# What it is
This is an authorative movement example for Forge Networking Remastered where players can freely move and jump inside the game without lag or rubber-banding until the player deviates from the server and is corrected - also known as "Server Reconciliation". This is a pattern that allows a client to have more crisp and lag-free movement than just interpolating to the players current position on the server. It also means that the player himself is always ahead of the server.

This example also supports actions like jumping, weapon-attacks and the casting of skills to be reconciliated by the server.

# How it works
A step by step example of what is happening:
1) The controlling player saves his input on every frame.
2) The controlling player plays the frames with the input he saved in order to move, jump, attack etc..
3) The controlling player sends his saved frames to the server in certain intervals (ex.: every 5 frames).
4) The server receives the frames and plays them like the controlling player would and saves the results for every frame.
5) The server sends his results back to the controlling player.
6) The controlling player receives the results from the server and compares the frames he played to the frames the server played. If he deviated from the server he _reconciliates_ (he corrects himself based on the results of the server).

# Further Improvements
### Limiting Deviation
Limiting how far the player can be further than the server is usually a good idea. Set yourself a target like "The player is allowed to be 250 frames further than the server". This can be easily achieved by modifying the `InputListenerPlayer` as follows:
```
if (_isOwner && (_listener.CurrentFrame - _listener.AuthorativeFrame) < 250) {
    _listener.SaveFrame();
}
```
When the player is 250 frames ahead of the server he can't save any more inputs which means no inputs can be played by the player or be send to the server until network stabilizes again. Try it out!

### Interpolation
If you want the example to look more smoothly you can turn on interpolation for `networkObject.position` in the Network Contract Wizard (NCW) of Forge Networking Remastered. This will result in reducing stutter when players see each other move.

### Rigidbodies
Currently the `RigidBody` of all other players on a client build up velocity when jumping for too long. I didn't want to bloat up the example too much so I didn't include a solution for it. By setting the `RigidBody` of all `InputListenerPlayer`s to `isKinematic = true` this issue should be resolved. Sorry for the inconvenience.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

ForgeAuthorativeMovement

ForgeAuthorativeMovement Latest Version Download

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