examples/bassteroids/source/rigidbody.cpp

   1 #include "rigidbody.h"
   2 #include <msp/game/entity.h>
   3 #include <msp/game/transform.h>
   4
   5 using namespace Msp;
   6
   7 RigidBody::RigidBody(Game::Handle<Game::Entity> e, const Setup &s):
   8         BufferedComponent<RigidBodyData>(e),
   9         setup(s)
  10 { }
  11
  12 void RigidBody::set_velocity(const LinAl::Vector<float, 2> &v)
  13 {
  14         write().velocity = v;
  15 }
  16
  17 void RigidBody::set_angular_velocity(Geometry::Angle<float> as)
  18 {
  19         write().angular_velocity = as;
  20 }
  21
  22 void RigidBody::add_force(const LinAl::Vector<float, 2> &f)
  23 {
  24         write().force += f;
  25 }
  26
  27 void RigidBody::add_force(const LinAl::Vector<float, 2> &f, const LinAl::Vector<float, 2> &p)
  28 {
  29         Data &d = write();
  30         d.force += f;
  31         LinAl::Vector<float, 2> r = p-entity->get_transform()->get_position().slice<2>(0);
  32         d.torque += r.x*f.y-r.y*f.x;
  33 }
  34
  35 void RigidBody::add_torque(float t)
  36 {
  37         write().torque += t;
  38 }
  39
  40 void RigidBody::clear_forces()
  41 {
  42         Data &d = write();
  43         d.force = LinAl::Vector<float, 2>();
  44         d.torque = 0.0f;
  45 }