Custom Ballistics Engine

[elfin timber]

I am currently trying to port my custom Unity ballistics engine to the Operation Harsh Doorstep (OHD) modding SDK.

Main Features of the Unity Ballistics Engine that could be ported:

Internal Ballistics
-Muzzle Velocity
-Recoil Force
External Ballistics
-Drag
-Wind
-Gravity
-Magnus Effect
-Coriolis Effect
-Eotvos Effect
-Gyroscopic Drift
Terminal Ballistics
-Projectile Shrapnel
-Ricochet
-Material Pen
Environmental Simulation
-Wind CFD Simulation

To Be Added (If requested):
NA

Porting Completion:
-Gravity
-Trajectory Velocity Visualizer
-Euler Method
-Continuous Collision Detection

Project Completion: 4%

Currently, OHD is utilizing an Unreal Engine projectile component rather than a custom solution. Therefore, the initial challenge involves creating a basic BP projectile simulation that the OHD SDK can interact with. If anyone that has a greater understanding of the modding SDK and could help with this initial step, that would be greatly appreciated.

[cold talon]

Only problem, there is no way to use C++, only blueprints

[elfin timber]

That shouldn't matter much, most of the stuff should be able to be converted to blueprint.

[cold talon]

Just wanted to make sure you knew, best of luck! Can't wait to see this in action 😄

[elfin timber]

Implemented First Order Euler Method ODE solver:

[elfin timber]

Gravity and trajectory/velocity visualizer finished:

Continuous Collision Detection implemented:

[elfin timber]

Implemented simple Projectile Material Pen solver:

[worn flare]

good job

[elfin timber]

Projectile impact Entry and Exit position:

[spare pelican]

Aaand my brain just hopped off the train.
I hope this ends up working though!

[restive temple]

[elfin timber]

Implemented Inelastic Collision resultant velocity calculations for projectile impact:

Ballistic pen demo parameters:
Delta Time: 0.0005 s
Bullet Radius: 0.00278 m
Material Yield Strength: 2200000 Pa
Drag Coefficient: 0.9
Material Density: 2500 kg/m^3
Bullet Mass: 0.003 kg
Material Thickness: ≈0.05m

[elfin timber]

Implemented simple ricochet solver:

Next will be finishing of the ricochet solver and creating a damage system similar to the GURPS High-Tech & Ultra-Tech damage models for projectiles.

[lone jay]

ooooh

bullet penetration

[elfin timber]

Projectile Ricochet demo using a barebones solver. Currently reached a road block with my full ballistics engine's ricochet solver, as it is way too complex to finish the conversion, given my current understanding of Blueprint.

[cold talon]

https://tenor.com/view/will-smith-thats-hot-cool-amazed-gif-13488740

[worthy meadow]

🤩 ok this is reminding me of the Arma 3 ballistics system

[elfin timber]

Not currently. Unfortunately I am only able to work on this in my spare time so updates will be slow. Also most of the stuff that I am currently working on is not visual enough for it to be interesting.