Class: BulldogPhysics::Particles::Collisions::ParticleContactResolver

Inherits:
Object
  • Object
show all
Defined in:
lib/Particles/particle_contact_resolver.rb

Overview

The contact resolution routine for particle contacts. One resolver instance can be shared for the entire simulation.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(iters = 2) ⇒ ParticleContactResolver

Returns a new instance of ParticleContactResolver.



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# File 'lib/Particles/particle_contact_resolver.rb', line 13

def initialize(iters = 2)
  @iterations = iters
  @iterations_used = 0  
end

Instance Attribute Details

#iterations ⇒ Object

Returns the value of attribute iterations.



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# File 'lib/Particles/particle_contact_resolver.rb', line 10

def iterations
  @iterations
end

#iterations_used ⇒ Object

Returns the value of attribute iterations_used.



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# File 'lib/Particles/particle_contact_resolver.rb', line 11

def iterations_used
  @iterations_used
end

Instance Method Details

#resolve_contacts(contact_array, num_contacts, duration) ⇒ Object 



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

def resolve_contacts(contact_array, num_contacts, duration)

  max_index = num_contacts
  max = REAL_MAX
  @iterations_used = 0
  while( @iterations_used < @iterations )
  
    contact_array.each_with_index do |contact, i|
      sep_vel = contact.calculate_separating_velocity  
      if( sep_vel < max && ( sep_vel < 0 || contact.penetration > 0) )
        max = sep_vel
        max_index = i
      end
    end


    break if( max_index.eql? num_contacts)


    contact_array[max_index].resolve(duration)

    @iterations_used += 1
  end # end while
  contact_array
end