PB Movement for Voices of the Void

Gives your character Half-Life 2 / Source-engine movement - air-strafing, bunnyhopping, and surfing - in place of VotV's default movement.

What you get

Air-strafing, bunnyhop (manual or auto), surfing on steep ramps Source-style, classic HL2/Source style character movment straight from Project Borealis.

Built for VotV a09 / a09n.

Configuring it - PBMovement.ini

Setting	What it does
EnableGraft	true/false master switch. Set to false to temporarily get vanilla VotV movement back without uninstalling.
RunSpeed	Your normal move speed. PB defaults are HL2-scale.
SprintSpeed	Speed while holding your run key.
WalkSpeed	Slow-walk speed.
JumpZVelocity	How high you jump.
AutoBunnyhop	true = hold jump to auto-bhop. false = you must tap jump each time.
AirControl	How much you can steer mid-air. 1.0 is full HL2-style control.

Music at speed ([Music])

Play a song of your own once you are actually moving fast. No music ships with the mod - drop a file in the same folder as main.dll and name it:

[Music]
File = The Laser Dance Song.mp3 ; Example

WAV, MP3 and FLAC work (OGG does not). It fades in once you pass SpeedOn (800 uu/s) and fades back out below SpeedOff (650). Both defaults are above your sprint speed on purpose - sprinting alone won't start it, you have to have built real speed by bunnyhopping, ABH or surfing.

Setting	What it does
File	Your song. Empty (the default) turns the feature off entirely.
SpeedOn / SpeedOff	Fade in at/above the first, out below the second. The gap stops it flickering while you hover at the threshold.
Volume	0-1. Your in-game volume sliders still apply on top.
FadeIn / FadeOut	Seconds for each fade.
Loop	Repeat while you stay fast.
RestartEachTime	false = a brief dip resumes where it left off. true = always start from the top.

Requires EnableGraft = true (with the graft off there is no movement tick to read your speed from).

Surf feel (if ramps don't behave)

Nothing to tune: whether a ramp catches you is decided the way Project Borealis decides it; if sliding along the surface would throw you upward faster than a jump, it isn't treated as a floor and you surf. BounceMultiplier in [Surf] is the only knob left (extra bounce off slope clips; 0 = none).

The remaining sections ([Acceleration], [Braking], [EdgeFriction], [Slope], [Misc]) are for fine-tuning the exact feel - the defaults match Project Borealis, so you can leave them alone unless you're chasing a specific feel.

How it works

PB's UPBPlayerMovement/APBPlayerCharacter are native engine classes that can't be registered into the shipped game, so instead of instantiating them we port PB's logic into the mod and graft it onto VotV's existing UCharacterMovementComponent. Two techniques:

1. Per-instance vtable swap: on player spawn we copy the component's vtable, point the movement virtuals (CalcVelocity, DoJump, HandleSlopeBoosting, GetMaxSpeed, NewFallVelocity, ShouldLimitAirControl) at our ported C++, and swap the instance's vtable pointer. Only the player's component is affected.
2. Blueprint bytecode patch: VotV's settings graph overwrote AirControl/JumpZVelocity every load, so we NopRange those two EX_Let writes in ExecuteUbergraph_mainPlayer (size-preserving) so PB's values stick.

Credits & license

Movement design and reference implementation by Project Borealis (PBCharacterMovement), which is released under the MIT License. This mod ports that movement logic and grafts it onto VotV's player at runtime.

Physics reference from Jiangwei Chong's Half-Life Physics Reference