Class: Jolt::Constraint

Inherits:
Object
  • Object
show all
Defined in:
lib/jolt/constraint.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(system, pointer, kind, body_a, body_b) ⇒ Constraint

Returns a new instance of Constraint.



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# File 'lib/jolt/constraint.rb', line 7

def initialize(system, pointer, kind, body_a, body_b)
  @system = system
  @pointer = pointer
  @kind = kind
  @body_a = body_a
  @body_b = body_b
  @destroyed = false
end

Instance Attribute Details

#body_a ⇒ Object (readonly)

Returns the value of attribute body_a.



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# File 'lib/jolt/constraint.rb', line 5

def body_a
  @body_a
end

#body_b ⇒ Object (readonly)

Returns the value of attribute body_b.



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# File 'lib/jolt/constraint.rb', line 5

def body_b
  @body_b
end

#kind ⇒ Object (readonly)

Returns the value of attribute kind.



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# File 'lib/jolt/constraint.rb', line 5

def kind
  @kind
end

#system ⇒ Object (readonly)

Returns the value of attribute system.



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# File 'lib/jolt/constraint.rb', line 5

def system
  @system
end

Instance Method Details

#__involves?(body) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jolt/constraint.rb', line 86

def __involves?(body)
  @body_a.equal?(body) || @body_b.equal?(body)
end

#__mark_destroyed ⇒ Object 



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# File 'lib/jolt/constraint.rb', line 90

def __mark_destroyed
  @destroyed = true
  @pointer = nil
end

#__native_pointer ⇒ Object 



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# File 'lib/jolt/constraint.rb', line 81

def __native_pointer
  check_alive!
  @pointer
end

#current_position ⇒ Object 



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# File 'lib/jolt/constraint.rb', line 42

def current_position
  check_alive!
  function = case @kind
             when :hinge then :JPH_HingeConstraint_GetCurrentAngle
             when :slider then :JPH_SliderConstraint_GetCurrentPosition
             else
               raise InvalidArgumentError, "#{@kind} constraints do not have a scalar position"
             end
  Native.public_send(function, @pointer)
end

#destroy ⇒ Object 



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# File 'lib/jolt/constraint.rb', line 73

def destroy
  @system.__destroy_constraint(self)
end

#destroyed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jolt/constraint.rb', line 77

def destroyed?
  @destroyed
end

#disable_motor ⇒ Object 



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# File 'lib/jolt/constraint.rb', line 67

def disable_motor
  check_alive!
  Native.public_send(motor_functions.fetch(:state), @pointer, 0)
  self
end

#enabled=(value) ⇒ Object 



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# File 'lib/jolt/constraint.rb', line 21

def enabled=(value)
  check_alive!
  Native.JPH_Constraint_SetEnabled(@pointer, !!value)
end

#enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jolt/constraint.rb', line 16

def enabled?
  check_alive!
  Native.JPH_Constraint_GetEnabled(@pointer)
end

#limits ⇒ Object 



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# File 'lib/jolt/constraint.rb', line 26

def limits
  check_alive!
  functions = limit_functions
  [
    Native.public_send(functions.fetch(:min), @pointer),
    Native.public_send(functions.fetch(:max), @pointer)
  ]
end

#limits=(value) ⇒ Object 



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# File 'lib/jolt/constraint.rb', line 35

def limits=(value)
  check_alive!
  minimum, maximum = ConstraintCollection.interval(value, "limits")
  Native.public_send(limit_functions.fetch(:set), @pointer, minimum, maximum)
  value
end

#motor_speed ⇒ Object 



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# File 'lib/jolt/constraint.rb', line 53

def motor_speed
  check_alive!
  Native.public_send(motor_functions.fetch(:get), @pointer)
end

#motor_speed=(value) ⇒ Object 



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# File 'lib/jolt/constraint.rb', line 58

def motor_speed=(value)
  check_alive!
  speed = Conversions.finite_float(value, "motor_speed")
  functions = motor_functions
  Native.public_send(functions.fetch(:state), @pointer, 1)
  Native.public_send(functions.fetch(:set), @pointer, speed)
  value
end