Class: CP::Body

Inherits:
Object
  • Object
show all
Defined in:
lib/chipmunk-ffi/body.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Body

Returns a new instance of Body.



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# File 'lib/chipmunk-ffi/body.rb', line 50

def initialize(*args)
  case args.size
  when 1
    @struct = args.first
  when 2
    ptr = CP.cpBodyNew(*args)
    @struct = BodyStruct.new ptr
    set_data_pointer
  else
    raise "wrong number of args for Body, got #{args.size}, but expected 2"
  end
  set_default_velocity_lambda
  set_default_position_lambda
end

Instance Attribute Details

#struct ⇒ Object (readonly)

Returns the value of attribute struct.



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# File 'lib/chipmunk-ffi/body.rb', line 49

def struct
  @struct
end

Instance Method Details

#a ⇒ Object Also known as: angle 



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# File 'lib/chipmunk-ffi/body.rb', line 123

def a
  @struct.a
end

#a=(pa) ⇒ Object Also known as: angle= 



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# File 'lib/chipmunk-ffi/body.rb', line 126

def a=(pa)
  CP.cpBodySetAngle(@struct.pointer, pa)
end

#apply_force(f, r) ⇒ Object 



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# File 'lib/chipmunk-ffi/body.rb', line 184

def apply_force(f,r)
  CP.cpBodyApplyForce(@struct.pointer,f.struct,r.struct)
end

#apply_impulse(j, r) ⇒ Object 



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# File 'lib/chipmunk-ffi/body.rb', line 188

def apply_impulse(j,r)
  CP.cpBodyApplyImpulse(@struct.pointer,j.struct,r.struct)
end

#f ⇒ Object Also known as: force 



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# File 'lib/chipmunk-ffi/body.rb', line 113

def f
  Vec2.new @struct.f
end

#f=(pf) ⇒ Object Also known as: force= 



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# File 'lib/chipmunk-ffi/body.rb', line 116

def f=(pf)
  @struct.f.pointer.put_bytes 0, pf.struct.to_bytes, 0,Vect.size
  self
end

#i ⇒ Object Also known as: moment 



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# File 'lib/chipmunk-ffi/body.rb', line 79

def i
  @struct.i
end

#i=(pi) ⇒ Object Also known as: moment= 



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# File 'lib/chipmunk-ffi/body.rb', line 82

def i=(pi)
  CP.cpBodySetMoment(@struct.pointer, pi)
end

#i_inv ⇒ Object Also known as: moment_inv 



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# File 'lib/chipmunk-ffi/body.rb', line 88

def i_inv
  @struct.i_inv
end

#local2world(v) ⇒ Object 



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# File 'lib/chipmunk-ffi/body.rb', line 172

def local2world(v)
  Vec2.new CP.cpBodyLocal2World(@struct.pointer,v.struct)
end

#m ⇒ Object Also known as: mass 



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# File 'lib/chipmunk-ffi/body.rb', line 65

def m
  @struct.m
end

#m=(pm) ⇒ Object Also known as: mass= 



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# File 'lib/chipmunk-ffi/body.rb', line 68

def m=(pm)
  CP.cpBodySetMass(@struct.pointer, pm)
end

#m_inv ⇒ Object Also known as: mass_inv 



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# File 'lib/chipmunk-ffi/body.rb', line 74

def m_inv
  @struct.m_inv
end

#p ⇒ Object Also known as: pos 



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# File 'lib/chipmunk-ffi/body.rb', line 93

def p
  Vec2.new @struct.p
end

#p=(new_p) ⇒ Object Also known as: pos= 



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# File 'lib/chipmunk-ffi/body.rb', line 96

def p=(new_p)
  @struct.p.pointer.put_bytes 0, new_p.struct.to_bytes, 0,Vect.size
  self
end

#position_func ⇒ Object 



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# File 'lib/chipmunk-ffi/body.rb', line 217

def position_func
  @user_level_position_lambda
end

#position_func=(l) ⇒ Object 



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# File 'lib/chipmunk-ffi/body.rb', line 221

def position_func=(l)
  @user_level_position_lambda = l
  
  # We keep the lambda in an ivar to keep it from being GCed
  @body_position_lambda = Proc.new do |body_ptr,dt|
    body_struct = BodyStruct.new(body_ptr)
    obj_id = body_struct.data.get_long(0)
    body = ObjectSpace._id2ref(obj_id)
    l.call(body,dt)
  end
  @struct.position_func = @body_position_lambda
end

#reset_forces ⇒ Object 



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# File 'lib/chipmunk-ffi/body.rb', line 180

def reset_forces
  CP.cpBodyResetForces(@struct.pointer)
end

#rot ⇒ Object 



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# File 'lib/chipmunk-ffi/body.rb', line 150

def rot
  Vec2.new @struct.rot
end

#t ⇒ Object Also known as: torque 



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# File 'lib/chipmunk-ffi/body.rb', line 141

def t
  @struct.t
end

#t=(pt) ⇒ Object Also known as: torque= 



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# File 'lib/chipmunk-ffi/body.rb', line 144

def t=(pt)
  @struct.t = pt
end

#update_position(dt) ⇒ Object 



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# File 'lib/chipmunk-ffi/body.rb', line 196

def update_position(dt)
  CP.cpBodyUpdatePosition(@struct.pointer,dt)
end

#update_velocity(g, dmp, dt) ⇒ Object 



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# File 'lib/chipmunk-ffi/body.rb', line 192

def update_velocity(g,dmp,dt)
  CP.cpBodyUpdateVelocity(@struct.pointer,g.struct,dmp,dt)
end

#v ⇒ Object Also known as: vel 



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# File 'lib/chipmunk-ffi/body.rb', line 103

def v
  Vec2.new @struct.v
end

#v=(pv) ⇒ Object Also known as: vel= 



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# File 'lib/chipmunk-ffi/body.rb', line 106

def v=(pv)
  @struct.v.pointer.put_bytes 0, pv.struct.to_bytes, 0,Vect.size
  self
end

#v_limit ⇒ Object Also known as: vel_limit 



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# File 'lib/chipmunk-ffi/body.rb', line 154

def v_limit
  @struct.v_limit
end

#v_limit=(new_v_limit) ⇒ Object Also known as: vel_limit= 



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# File 'lib/chipmunk-ffi/body.rb', line 157

def v_limit=(new_v_limit)
  @struct.v_limit = new_v_limit
end

#velocity_func ⇒ Object 



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# File 'lib/chipmunk-ffi/body.rb', line 200

def velocity_func
  @user_level_velocity_lambda
end

#velocity_func=(l) ⇒ Object 



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# File 'lib/chipmunk-ffi/body.rb', line 204

def velocity_func=(l)
  @user_level_velocity_lambda = l
  
  # We keep the lambda in an ivar to keep it from being GCed
  @body_velocity_lambda = Proc.new do |body_ptr,g,dmp,dt|
    body_struct = BodyStruct.new(body_ptr)
    obj_id = body_struct.data.get_long(0)
    body = ObjectSpace._id2ref(obj_id)
    l.call(body,g,dmp,dt)
  end
  @struct.velocity_func = @body_velocity_lambda
end

#w ⇒ Object Also known as: ang_vel 



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# File 'lib/chipmunk-ffi/body.rb', line 132

def w
  @struct.w
end

#w=(pw) ⇒ Object Also known as: ang_vel= 



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# File 'lib/chipmunk-ffi/body.rb', line 135

def w=(pw)
  @struct.w = pw
end

#w_limit ⇒ Object Also known as: ang_vel_limit 



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# File 'lib/chipmunk-ffi/body.rb', line 163

def w_limit
  @struct.w_limit
end

#w_limit=(new_w_limit) ⇒ Object Also known as: ang_vel_limit= 



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# File 'lib/chipmunk-ffi/body.rb', line 166

def w_limit=(new_w_limit)
  @struct.w_limit = new_w_limit
end

#world2local(v) ⇒ Object 



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# File 'lib/chipmunk-ffi/body.rb', line 176

def world2local(v)
  Vec2.new CP.cpBodyWorld2Local(@struct.pointer,v.struct)
end