Class: Pongo::CircleParticle

Inherits:
AbstractParticle show all
Defined in:
lib/pongo/circle_particle.rb

Overview

A circle shaped particle.

Direct Known Subclasses

WheelParticle

Instance Attribute Summary collapse

Attributes inherited from AbstractParticle

#center, #collidable, #collision, #curr, #first_collision, #fixed, #force_list, #forces, #friction, #interval, #inv_mass, #kfr, #mass, #multisample, #prev, #samp, #temp

Attributes inherited from AbstractItem

#always_repaint, #display_object, #display_object_offset, #display_object_rotation, #fill_alpha, #fill_color, #line_alpha, #line_color, #line_thickness, #renderer, #solid, #user_data, #visible

Instance Method Summary collapse

Methods inherited from AbstractParticle

#accumulate_forces, #add_force, #clear_forces, #collidable!, #collidable?, #components, #elasticity, #elasticity=, #fixed?, #position, #position=, #px, #px=, #py, #py=, #reset_first_collision!, #resolve_collision, #solid?, #test_particle_events, #update, #velocity, #velocity=

Methods inherited from AbstractItem

#add_event_listener, #always_redraw!, #always_redraw=, #always_redraw?, #cleanup, #dispatch_event, #draw, #has_event_listener, #init, #set_fill, #set_line, #set_style, #visible!, #visible?

Constructor Details

#initialize(x, y, radius, options = {}) ⇒ CircleParticle

Returns a new instance of CircleParticle.



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# File 'lib/pongo/circle_particle.rb', line 8

def initialize(x, y, radius, options={})
  options = {:fixed => false, :mass => 1, :elasticity => 0.3, :friction => 0}.update(options)
  super(x, y, options[:fixed], options[:mass], options[:elasticity], options[:friction])
  @radius = radius
end

Instance Attribute Details

#radius ⇒ Object

Returns the value of attribute radius.



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# File 'lib/pongo/circle_particle.rb', line 6

def radius
  @radius
end

Instance Method Details

#interval_x ⇒ Object Also known as: get_interval_x 



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# File 'lib/pongo/circle_particle.rb', line 22

def interval_x
  @interval.min = @samp.x - @radius
  @interval.max = @samp.x + @radius
  @interval
end

#interval_y ⇒ Object Also known as: get_interval_y 



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# File 'lib/pongo/circle_particle.rb', line 29

def interval_y
  @interval.min = @samp.y - @radius
  @interval.max = @samp.y + @radius
  @interval
end

#projection(axis) ⇒ Object Also known as: get_projection 



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# File 'lib/pongo/circle_particle.rb', line 14

def projection(axis)
  c = @samp.dot(axis)
  @interval.min = c - @radius
  @interval.max = c + @radius
  @interval
end