Function calculateHipRotationPowerModifier

calculateHipRotationPowerModifier(
hipRotationAngle: number,
techniqueType: "strike" | "throw" | "joint",
): number
Calculate damage modifier from hip rotation

Determines power bonus applied to techniques based on hip rotation angle. Greater hip rotation generates more power through proper biomechanics, with strikes benefiting most from full rotation.
Parameters
- hipRotationAngle: number
  Hip rotation angle in radians (typically from torso twist)
- techniqueType: "strike" | "throw" | "joint"
  Type of technique ('strike', 'throw', or 'joint')
Returns number
Damage multiplier (1.0-1.3 for strikes, 1.0-1.1 for throws/joints)
Example
```
// Full hip rotation on strike technique
const modifier = calculateHipRotationPowerModifier(Math.PI / 2, 'strike');
// Returns 1.30 (30% damage bonus)

// Half rotation on throw
const throwMod = calculateHipRotationPowerModifier(Math.PI / 4, 'throw');
// Returns 1.05 (5% damage bonus)
```
Korean
허리회전으로인한데미지배율계산
- Defined in systems/animation/builders/SkeletonRig.ts:1246