*** empty log message ***

panda/src/physics/linearIntegrator.cxx

@@ -1,4 +1,4 @@
-// Filename: LinearIntegrator.cxx
+// Filename: LinearIntegrator.C
 // Created by:  charles (02Aug00)
 // 
 ////////////////////////////////////////////////////////////////////
@@ -37,9 +37,27 @@ LinearIntegrator::
 void LinearIntegrator::
 integrate(Physical *physical, vector< PT(LinearForce) > &forces,
 	  float dt) {
+/*// darren, 2000.10.06
   // cap dt so physics don't go flying off on lags
   if (dt > _max_linear_dt)
     dt = _max_linear_dt;
+*/
+
+  vector< PT(PhysicsObject) >::const_iterator current_object_iter;
+  current_object_iter = physical->get_object_vector().begin();
+  for (; current_object_iter != physical->get_object_vector().end(); 
+       current_object_iter++) {
+    PhysicsObject *current_object = *current_object_iter;
+
+    // bail out if this object doesn't exist or doesn't want to be
+    // processed.
+    if (current_object == (PhysicsObject *) NULL)
+      continue;
+    
+    // set the object's last position to its current position before we move it
+    current_object->set_last_position(current_object->get_position());
+
+  }
 
   child_integrate(physical, forces, dt);
 }

panda/src/physics/physicsObject.I

@@ -33,6 +33,29 @@ set_position(float x, float y, float z) {
   _position.set(x, y, z);
 }
 
+////////////////////////////////////////////////////////////////////
+//    Function : set_position_HandOfGod
+//      Access : Public
+// Description : use this to place an object in a completely new
+//               position, that has nothing to do with its last
+//               position (moved by the Hand Of God, or "HOG")
+////////////////////////////////////////////////////////////////////
+INLINE void PhysicsObject::
+set_position_HandOfGod(const LPoint3f &pos) {
+  _position = pos;
+  _last_position = pos;
+}
+
+////////////////////////////////////////////////////////////////////
+//    Function : set_last_position
+//      Access : Public
+// Description : Last position assignment
+////////////////////////////////////////////////////////////////////
+INLINE void PhysicsObject::
+set_last_position(const LPoint3f& pos) {
+  _last_position = pos;
+}
+
 ////////////////////////////////////////////////////////////////////
 //    Function : set_velocity
 //      Access : Public
@@ -93,6 +116,16 @@ get_position(void) const {
   return _position;
 }
 
+////////////////////////////////////////////////////////////////////
+//    Function : get_last_position
+//      Access : Public
+// Description : Last position Query
+////////////////////////////////////////////////////////////////////
+INLINE LPoint3f PhysicsObject::
+get_last_position(void) const {
+  return _last_position;
+}
+
 ////////////////////////////////////////////////////////////////////
 //    Function : get_velocity
 //      Access : Public

panda/src/physics/physicsObject.cxx

@@ -1,4 +1,4 @@
-// Filename: physics_object.cxx
+// Filename: physics_object.C
 // Created by:  charles (13Jun00)
 // 
 ////////////////////////////////////////////////////////////////////
@@ -17,6 +17,7 @@ PhysicsObject(void) :
   _process_me(false), _mass(1.0f), _oriented(true),
   _terminal_velocity(_default_terminal_velocity) {
   _position.set(0, 0, 0);
+  _last_position = _position;
   _velocity.set(0, 0, 0);
   _orientation.set(1, 0, 0, 0);
   _rotation.set(0, 0, 0);
@@ -51,6 +52,7 @@ operator =(const PhysicsObject &other) {
   _process_me = other._process_me;
   _mass = other._mass;
   _position = other._position;
+  _last_position = other._last_position;
   _velocity = other._velocity;
   _orientation = other._orientation;
   _rotation = other._rotation;

panda/src/physics/physicsObject.h

@@ -6,7 +6,7 @@
 #ifndef PHYSICS_OBJECT_H
 #define PHYSICS_OBJECT_H
 
-#include <pandabase.h>
+#include <compiler.h>
 #include <typedReferenceCount.h>
 #include <luse.h>
 
@@ -20,6 +20,7 @@ class EXPCL_PANDAPHYSICS PhysicsObject : public TypedReferenceCount {
 private:
   // physical
   LPoint3f _position;
+  LPoint3f _last_position;
   LVector3f _velocity;
 
   // angular
@@ -47,6 +48,11 @@ public:
   INLINE void set_position(float x, float y, float z);
   INLINE LPoint3f get_position(void) const;
 
+  INLINE void set_position_HandOfGod(const LPoint3f &pos);
+
+  INLINE void set_last_position(const LPoint3f &pos);
+  INLINE LPoint3f get_last_position(void) const;
+
   INLINE void set_velocity(const LVector3f &vel);
   INLINE void set_velocity(float x, float y, float z);
   INLINE LVector3f get_velocity(void) const;