Class used in other constraint parts to calculate the required bias factor in the lagrange multiplier for creating springs. More...

#include <SpringPart.h>

Public Member Functions
void	CalculateSpringPropertiesWithBias (float inBias)

void	CalculateSpringPropertiesWithFrequencyAndDamping (float inDeltaTime, float inInvEffectiveMass, float inBias, float inC, float inFrequency, float inDamping, float &outEffectiveMass)

void	CalculateSpringPropertiesWithStiffnessAndDamping (float inDeltaTime, float inInvEffectiveMass, float inBias, float inC, float inStiffness, float inDamping, float &outEffectiveMass)

bool	IsActive () const
	Returns if this spring is active.

float	GetBias (float inTotalLambda) const
	Get total bias b, including supplied bias and bias for spring: lambda = J v + b.

Detailed Description

Class used in other constraint parts to calculate the required bias factor in the lagrange multiplier for creating springs.

Member Function Documentation

void SpringPart::CalculateSpringPropertiesWithBias ( float inBias )

inline

Turn off the spring and set a bias only

Parameters

inBias Bias term (b) for the constraint impulse: lambda = J v + b

void SpringPart::CalculateSpringPropertiesWithFrequencyAndDamping	(	float	inDeltaTime,
		float	inInvEffectiveMass,
		float	inBias,
		float	inC,
		float	inFrequency,
		float	inDamping,
		float &	outEffectiveMass )

inline

Calculate spring properties based on frequency and damping ratio

Parameters

inDeltaTime	Time step
inInvEffectiveMass	Inverse effective mass K
inBias	Bias term (b) for the constraint impulse: lambda = J v + b
inC	Value of the constraint equation (C). Set to zero if you don't want to drive the constraint to zero with a spring.
inFrequency	Oscillation frequency (Hz). Set to zero if you don't want to drive the constraint to zero with a spring.
inDamping	Damping factor (0 = no damping, 1 = critical damping). Set to zero if you don't want to drive the constraint to zero with a spring.
outEffectiveMass	On return, this contains the new effective mass K^-1

void SpringPart::CalculateSpringPropertiesWithStiffnessAndDamping	(	float	inDeltaTime,
		float	inInvEffectiveMass,
		float	inBias,
		float	inC,
		float	inStiffness,
		float	inDamping,
		float &	outEffectiveMass )

inline

Calculate spring properties with spring Stiffness (k) and damping (c), this is based on the spring equation: F = -k * x - c * v

Parameters

inDeltaTime	Time step
inInvEffectiveMass	Inverse effective mass K
inBias	Bias term (b) for the constraint impulse: lambda = J v + b
inC	Value of the constraint equation (C). Set to zero if you don't want to drive the constraint to zero with a spring.
inStiffness	Spring stiffness k. Set to zero if you don't want to drive the constraint to zero with a spring.
inDamping	Spring damping coefficient c. Set to zero if you don't want to drive the constraint to zero with a spring.
outEffectiveMass	On return, this contains the new effective mass K^-1

float SpringPart::GetBias ( float inTotalLambda ) const

inline

Get total bias b, including supplied bias and bias for spring: lambda = J v + b.

bool SpringPart::IsActive ( ) const

inline

Returns if this spring is active.

The documentation for this class was generated from the following file: