Where is Gravity?

[egyware]

Hello everyBody.
I'm Newbie with Newton.
In my game put into the world a body attached a HeightFieldCollision with zero unit mass and another body attached a Box with 15 unit mass (for example) but moment of inertia zero (without rotation), Then while running my game the object doesn't move (The graphics position are updated with dynamic body)
The question is:
Where is Gravity?
I try find at http://newtondynamics.com/wiki/index.ph ... ons_in_2.0 some funtions to set Gravity but I don't find anything
I watch some simple tutorials but doesn't necesary set this.
How I Simule my world with Gravity?

I have Newton 2.22 SDK for Windows

PS:
I set Velocity to dynamic body and move it, but the gravity doesn't exist

[Carli]

NewtonSetForceAndTorqueCallback

use Newton Wiki FAQ

[egyware]

NewtonSetForceAndTorqueCallback

use Newton Wiki FAQ

THANK YOU!!!!!

Check some tutorials I find this

Code: Select all

NewtonBodySetForceAndTorqueCallback(tmp->body, ApplyForceAndTorqueEvent);

Code: Select all

void _cdecl CGame::ApplyForceAndTorqueEvent (const NewtonBody* body)
{
   float mass;
   float Ixx;
   float Iyy;
   float Izz;
   float force[3];
   float torque[3];

   NewtonBodyGetMassMatrix (body, &mass, &Ixx, &Iyy, &Izz);

   force[0] = 0.0f;
   force[1] = NEWTON_GRAVITY * mass;  /// <-------- :D
   force[2] = 0.0f;

   torque[0] = 0.0f;
   torque[1] = 0.0f;
   torque[2] = 0.0f;

   NewtonBodyAddForce (body, force);
   NewtonBodyAddTorque (body, torque);
}

Well now I will continue programming
Thank you very much