Where to start with Custom Capsule / Sphere Character Controller?

[shadow4765]

I was doing some physics work and i realised my standard humanoid roblox character physics will probably not work well with my goals - i opted for a custom character controller.

I started with a sphere and bodyvelocity in it, this worked, but i wanted to keep the normal robloxian look and so i tried to attach my character to it with alignposition and an attachment that hovers above the spheres position (because the sphere rotates).
Sad to say it was wonky as hell and bugged out and flinged me to the sun every time.

Next I tried capsule, with my character in it, which i am probably going to stick with, but i cant for the love of me figure out how i can simulate gravity while using linearvelocity?

VectorForces are terrible for me, calculating mass and getting insanely high non-stop acceleration ,i had to scrap them immediately. Anyone have any experience with both? Is there an open-source repro i could learn from?

[dthecoolest]

@shadow4765

VectorForces are terrible for me, calculating mass and getting insanely high non-stop acceleration

The non-stop acceleration is due to lack of drag forces and adding one should do the trick. However I would put a disclaimer that I have found that this is not a perfect solution as there is one flaw at low fps (1-10 fps) where the character will fling during high speeds due to Roblox treating the vector force as constant throughout the frame (1/60 seconds, worse at low fps 1/20)

PhysicsCharacterController | Mover Constraints based character controller

Just a small project that I initially made in 2-4 + hours purely for learning purposes that I wanted to share since I see not a lot of example projects for character controllers here on the dev forum the only one other being @EgoMoose platformer controller. However soon later found out it was a lot of fun to play with and thought to modularize it further into a full blown project. Objectives: Similar to default humanoid controller movement running Humanoid autorotate Controllable fric…

@shadow4765

I started with a sphere and bodyvelocity

EgoMooses character controller uses a sphere to create sliding motion. I imagine a sphere would not be good for modelling a character going up stairs as it will not be able to smoothly.

[Release] Platformer character controller

I made a character controller that allows for a style of movement you would typically find in 3D platformer style games. It works with both keyboards and controllers and could easily be extended to mobile with a little extra work. I decided to release this to give those interested in making a game like this an idea of one way to put this together. Move Set Double jump: (Press jump twice) [2018-10-30_14-57-43] High jump: (Crouch and jump while not moving) [2018-10-30_14-57-56] Long jump: (C…

[shadow4765]

Does your controller use VectorForces as well? How did you calculate drag and gravity for them?

[dthecoolest]

Yep my controller uses vector forces. I used not only drag force but also friction force will allows the character to stop faster at low speeds (drag is proportional to velocity squared, velocity close to zero, drag close to zero). I do not calculate gravity the Roblox engine handles that by itself.

--Friction formula
--Exponential is there as at low speeds there is less friction, prevents oscilations or force overshoot
        flatFrictionScalar = model:GetAttribute("FlatFriction")*(1.0-math.exp(-2*xzSpeed))

--Drag force formula, XZ speed is .AssemblyLinearVelocity without y component
        local netDragForce = -unitXZ*(xzSpeed^2)*model:GetAttribute("XZDragFactorVSquared")

[shadow4765]

I’ll have a look at your character controller and see if i can implement it into my current codebase, it looks like what i specifically need, thanks.