Curve Editor

This guide explains the curve feature for varying parameters along the bone chain.

note

This page is a usage guide. For the reference of each curve property (DampingCurveData, etc.), see Physics Parameters.

Overview

Using curves, you can smoothly vary parameters from the root to the tip of the bone chain.

Smoothly varying a parameter (e.g. Stiffness) from the root toward the tip of the bone chain (diagram labels are in Japanese).

Supported Parameters

The following parameters support curves (Physics Settings | Curves category, AdvancedDisplay). Each is multiplied into its parameter according to the bone-length ratio from the RootBone (0.0–1.0).

• Damping Curve - Damping (editor display name: Damping Rate by Bone Length Rate)
• Stiffness Curve - Stiffness (Stiffness Rate by Bone Length Rate)
• World Damping Location Curve - World location damping (World Damping Location Rate by Bone Length Rate)
• World Damping Rotation Curve - World rotation damping (World Damping Rotation Rate by Bone Length Rate)
• Radius Curve - Radius (Radius Rate by Bone Length Rate)
• LimitAngle Curve - Angle limit (LimitAngle Rate by Bone Length Rate)

Setting Up Curves

1. Select the KawaiiPhysics node
2. Expand the target Curve property
3. Add and edit keys in the curve editor

Reading Curves

Axis	Meaning
X axis	Position in bone chain (0=root, 1=tip)
Y axis	Parameter value

Setting Examples

Hair

Stiff at root, soft at tip:

Stiffness Curve:
  (0.0, 0.5)  ← Root: stiffer
  (1.0, 0.05) ← Tip: softer

Tail

Uniform movement:

Damping Curve:
  (0.0, 0.2)
  (1.0, 0.2)  ← Same value throughout

Skirt

Widening toward hem:

Radius Curve:
  (0.0, 5.0)  ← Waist area
  (1.0, 15.0) ← Hem

Curve vs Fixed Value

Situation	Recommended
Want same movement throughout	Fixed value
Want different movement at root and tip	Curve
Want special movement only in middle section	Curve

tip

It's efficient to start adjusting with fixed values and switch to curves as needed.