Class: BulldogPhysics::BoundingSphere

Inherits:
Object
  • Object
show all
Defined in:
lib/RigidBodies/rigid_collisions.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ BoundingSphere

Returns a new instance of BoundingSphere.



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# File 'lib/RigidBodies/rigid_collisions.rb', line 5

def initialize(*args)
	if args.size > 1
		if args[0].is_a? Vector3
			@center = args[0]
			@radius = args[1]
		elsif args[0].is_a?  BoundingSphere
			initialize_with_bounding_spheres(args[0],args[1])
		end
	end
end

Instance Attribute Details

#center ⇒ Object

Returns the value of attribute center.



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# File 'lib/RigidBodies/rigid_collisions.rb', line 3

def center
  @center
end

#radius ⇒ Object

Returns the value of attribute radius.



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# File 'lib/RigidBodies/rigid_collisions.rb', line 3

def radius
  @radius
end

Instance Method Details

#initialize_with_bounding_spheres(one, two) ⇒ Object 



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# File 'lib/RigidBodies/rigid_collisions.rb', line 16

def initialize_with_bounding_spheres(one, two)
	center_offset = two.center - one.center
	distance = center_offset.squareMagnitude()
	radius_diff = two.radius - one.radius

	if radius_diff * radius_diff >= distance
		if one.radius > two.radius
			@center = one.center
			@radius = one.radius
		else
			@center = two.center
			@radius = two.radius
		end
	else
		distance = Math.sqrt(distance)
		@radius = (distance + one.radius + two.radius) * 0.5
		@center = one.center

		if distance > 0
			@center += center_offset * ((@radius - one.radius) / distance)
		end
	end

end

#overlaps(other) ⇒ Object 



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# File 'lib/RigidBodies/rigid_collisions.rb', line 41

def overlaps(other)
	distance_squared = (@center - other.center).squareMagnitude
	return distance_squared < (@radius + other.radius)*(@radius + other.radius)
end