Simulation Overview

DanceXR’s simulation system includes advanced particle dynamics, cloth simulation, and experimental fluid simulation, offering realistic and performant physics for various use cases.

Particle Dynamics

The particle dynamics system replaces traditional physics for hair, clothing, and skirts, providing smoother and more stable results.

Key Configurations:
- Inertia
- Swing compliance
- Twist compliance
- Reduction ratio
- Particle anchor
- Lateral compliance and anchor (for skirts)
Wind and Turbulence:
- Global wind settings for speed and direction
- Turbulence forces for individual groups
- Wind fields for localized effects like fans or tunnels

Cloth Simulation

The cloth simulation system supports XPS and PMX models with features like unbreakable stability and custom curved colliders.

Configurations:
- Mesh creation with adjustable radius, length, slope, and resolution
- Anchoring to body parts
- Interaction settings for dragging and tearing
- Self-collision and physics properties
Performance Tips:
- Use a fixed frame rate for optimal simulation
- Adjust collider shapes for model-specific tuning
Underwater Behavior:
- Buoyancy and drag settings for underwater simulations

Fluid Simulation (Experimental)

The fluid simulation extends the particle system to simulate fluid behavior.

Attributes:
- Cohesion force
- Viscosity
- Stickiness
Rendering:
- Fluid particles rendered as points or spheres
- Fluid shaders coming in future updates
Use Cases:
- Simulate scenarios like showers, fountains, or garden hoses

Additional Features

Soft Body Simulation:
- Realistic soft body physics for body parts like boobs, butts, and legs
- Volume and distance constraints for fine-tuning
- Visualization tools for particle connections
LipSync and Spatial Audio:
- LipSync generates facial movements from audio
- Spatial audio plays sound from actor positions in 3D space

For more details, refer to the release notes.