Panda Physic engine : simulating gravity.

C++ coding using Panda3D
2

Hi

Did you create an AsyncTask ?

I know when I was doing particle system I had to add a task to update the PhysicsManager.

example:

In my include file:

PhysicsManager mPhysicsManager;

static AsyncTask::DoneStatus updateEffectsTask(GenericAsyncTask* task, void* data);

PT(AsyncTaskManager) mTaskMgr;

PT(GenericAsyncTask) mUpdateEffectsTask;

In my cpp file:
Constructor…
LinearEulerIntegrator *lei = new LinearEulerIntegrator();
mPhysicsManager.attach_linear_integrator(lei);

mUpdateEffectsTask = new GenericAsyncTask("mUpdateEffectsTask", (GenericAsyncTask::TaskFunc*)Effects::updateEffectsTask, this);

mTaskMgr = AsyncTaskManager::get_global_ptr();
mTaskMgr->add(mUpdateEffectsTask);
.
.
then in your task (my class is called Effects)
AsyncTask::DoneStatus Effects::updateEffectsTask(GenericAsyncTask* task, void* data) {

Effects effects = (Effects)data;

float dt = ClockObject::get_global_clock()->get_dt();
effects->mEffectsManager.do_particles(dt);
effects->mPhysicsManager.do_physics(dt);

return AsyncTask::DS_cont;

}

You might need to do something like this, but in your
case just do the:
pm.do_physics(dt);

tim