plRopeSimulator Class Reference

A simple simulator for swinging and hanging ropes. More...

#include <RopeSimulator.h>

Classes
struct	Node

Public Member Functions
void	SimulateRope (const plTime &diff)
void	SimulateStep (const plSimdFloat fDiffSqr, plUInt32 uiMaxIterations, plSimdFloat fAllowedError)
void	SimulateTillEquilibrium (plSimdFloat fAllowedMovement=0.005f, plUInt32 uiMaxIterations=1000)
bool	HasEquilibrium (plSimdFloat fAllowedMovement) const
float	GetTotalLength () const
plSimdVec4f	GetPositionAtLength (float fLength) const

Public Attributes
plVec3	m_vAcceleration = plVec3(0, 0, -10)
	External acceleration, typically gravity or a combination of gravity and wind. Applied to all rope nodes equally.
plDynamicArray< Node, plAlignedAllocatorWrapper >	m_Nodes
	All the nodes in the rope.
float	m_fDampingFactor = 0.995f
	A factor to dampen velocities to make the rope stop swinging. Should be between 0.97 (strong damping) and 1.0 (no damping).
float	m_fSegmentLength = 0.1f
	How long each rope segment (between two nodes) should be.
bool	m_bFirstNodeIsFixed = true
bool	m_bLastNodeIsFixed = true

Detailed Description

A simple simulator for swinging and hanging ropes.

Can be used both for interactive rope simulation, as well as to just pre-compute the shape of hanging wires, cables, etc. Uses Verlet Integration to update the rope positions from velocities, and the "Jakobsen method" to enforce rope distance constraints.

Based on https://owlree.blog/posts/simulating-a-rope.html

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

• Code/Engine/GameEngine/Physics/RopeSimulator.h
• Code/Engine/GameEngine/Physics/Implementation/RopeSimulator.cpp