Class: BulldogPhysics::Particles::Collisions::ParticleCable

Inherits:
ParticleLink show all
Defined in:
lib/Particles/particle_cable.rb

Overview

Cables link a pair of particles, generating a contact if they stray too far apart.

Instance Attribute Summary collapse

Attributes inherited from ParticleLink

#particle1, #particle2

Instance Method Summary collapse

Constructor Details

#initialize(particle1, particle2, max_length = 1.0, restitution = 1.0) ⇒ ParticleCable

Returns a new instance of ParticleCable.



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# File 'lib/Particles/particle_cable.rb', line 18

def initialize(particle1, particle2, max_length = 1.0, restitution = 1.0)
  super(particle1, particle2)
  @max_length = max_length
  @restitution = restitution
end

Instance Attribute Details

#max_length ⇒ Object

Holds the maximum length of the cable.



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# File 'lib/Particles/particle_cable.rb', line 12

def max_length
  @max_length
end

#restitution ⇒ Object

Holds the restitution (bounciness) of the cable.



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# File 'lib/Particles/particle_cable.rb', line 15

def restitution
  @restitution
end

Instance Method Details

#add_contact(contactArray, limit) ⇒ Object

see ParticleLink for description



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# File 'lib/Particles/particle_cable.rb', line 25

def add_contact(contactArray, limit)
  length = (@particle1.position - @particle2.position).magnitude
  
  
  if( length < @max_length)
    return 0
  end
  
  contact = ParticleContact.new(@particle1, @particle2)
  
  contact.penetration = length - @max_length
  contact.restitution = @restitution
  
  contactArray << contact
  
  return 1
end

#current_length ⇒ Object 



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# File 'lib/Particles/particle_cable.rb', line 43

def current_length
  (@particle1.position - @particle2.position).magnitude
end