Plugins + Scripts Thrust Response Driver

Thrust Response Driver​

Thrust Response Driver is a lightweight physics plugin for Virt-A-Mate that adds natural, impact-driven body response to thrusting motion — without overriding animations, poses, or controller logic.


The plugin observes the source atom’s hip movement and applies a physically consistent response to selected receiver body parts, based on actual contact and impulse, rather than continuous force or animation-driven motion.


The result is realistic mass, inertia, and follow-through, especially in positions where the receiver would normally feel passive or unresponsive.

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Impact-Driven Response (Default & Recommended)​

Thrust Response Driver now uses an Impact Trigger system (enabled by default):

• Forward response is gated by actual collision/contact
• No estimated timing, no artificial buildup
• Body response follows a causal chain:
  contact → impulse → inertia → settle
• Prevents unnatural sliding or constant pull-in behavior
• Works consistently across positions like doggy, missionary, and prone

The Impact Trigger is the recommended mode of operation and provides the most realistic results out of the box.

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Legacy Velocity Mode (Optional)​

For compatibility and experimentation, the original velocity-based response mode is still available and can be toggled off/on.


Both modes share the same physical response pipeline and can be selected per preset.

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Core Design Principles​

Thrust Response Driver is designed to be non-intrusive:

• Does not drive controllers
• Does not inject rotations
• Does not fight Timeline or animation systems
• Works alongside manual posing and animation
• Minimal performance overhead

All motion is applied as offset-based physical response, not animation replacement.

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Features​

• Impact-driven body response (default)
• Optional legacy velocity-based response
• Directionally correct impulse and follow-through
• Modular receiver body part selection:
  • Head
  • Chest
  • Abdomen
  • Hip
  • Thighs
  • Feet
• PD-controlled response with damping and acceleration limits
• Built-in presets: Soft / Medium / Strong
• Custom user presets (including impact trigger state & geometry)
• Designed to work seamlessly with Timeline and existing scenes
• Lightweight and stable

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Why Thrust Response Driver​

Vanilla VaM thrusting often results in:

• minimal receiver movement
• no visible inertia
• one-sided motion

Thrust Response Driver focuses on body reaction, not counter-force or controller stabilization — making interactions feel less static and more alive.


With Thrust Response Driver:


Without Thrust Response Driver:

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Usage​

1. Attach the plugin to the receiver atom (typically female).
2. Select the source atom (typically male).
3. Choose a preset or adjust values as desired.
4. Enable or disable receiver body parts as needed.

The plugin automatically uses the source hip movement as the motion driver.

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License​

CC BY-SA
Created by SwitchViewVR