some a6 physics questions

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Re: some a6 physics questions #15411 04/26/03 20:44 04/26/03 20:44
Joined: May 2002 Posts: 7,441 ventilator OP Senior Expert
ventilator OP Senior Expert Joined: May 2002 Posts: 7,441	some more question: if a physics entity stops movement completely (but is still a physics entity) it does only require very minimal or no cpu performance right? if i stack some boxes then i can notice that they jitter a little sometimes when i look very closely. how can i avoid this? ...because i think this takes more cpu performance than it would take when they were completely standing still.

Re: some a6 physics questions #15412 04/26/03 21:32 04/26/03 21:32
Joined: Jun 2002 Posts: 473 Juff Senior Member
Juff Senior Member Joined: Jun 2002 Posts: 473	how do I add gravity to the code ventilator posted EDIT nevermind I got it, this is really cool click me

Re: some a6 physics questions #15413 04/26/03 21:40 04/26/03 21:40
A Anonymous Unregistered
Anonymous Unregistered A	Yo could try: var earthgravity[3] = 0,0, -386; ////////////////////////////// // -386 is the downward pulling force along the z axis ////////////////////////////// action sphere { my.shadow=on; ph_setgravity( earthgravity );////////////////////////////// // and now you set the gravity ////////////////////////////// phent_settype(my, PH_RIGID, PH_SPHERE); phent_setmass(my, 5, PH_SPHERE); phent_setfriction(my, 70); phent_setelasticity(my, 70, 5); phent_setdamping(my, 20, 20 ); temp.x=cos(camera.pan)cos(camera.tilt)300000; temp.y=sin(camera.pan)cos(camera.tilt)300000; temp.z=sin(camera.tilt)300000; phent_addforcelocal(my,temp,nullvector); } string mdl_sphere=<sphere_0.mdl>; function emit_sphere() { temp.x=camera.x+cos(camera.pan)cos(camera.tilt)100; temp.y=camera.y+sin(camera.pan)cos(camera.tilt)100; temp.z=camera.z+sin(camera.tilt)100; ent_create(mdl_sphere,temp,sphere); } on_mouse_left=emit_sphere;

Re: some a6 physics questions #15414 04/26/03 23:06 04/26/03 23:06
A Anonymous Unregistered
Anonymous Unregistered A	lets update our profile

Re: some a6 physics questions #15415 04/27/03 00:53 04/27/03 00:53
Joined: Jun 2002 Posts: 473 Juff Senior Member
Juff Senior Member Joined: Jun 2002 Posts: 473	okay now I want the ball to be removed about 5 seconds after I shoot it, so i can shoot another ball, since I have com. click me

Re: some a6 physics questions #15416
04/27/03 01:02 04/27/03 01:02

Joined: May 2002
Posts: 7,441

ventilator Offline

OP
Senior Expert

ventilator Offline

OP
Senior Expert

Joined: May 2002
Posts: 7,441

code:

action sphere
{
  my.shadow=on;
  phent_settype(my, PH_RIGID, PH_SPHERE);
  phent_setmass(my, 5, PH_SPHERE);
  phent_setfriction(my, 70);
  phent_setelasticity(my, 50, 10);
  phent_setdamping(my, 20, 20 );
  temp.x=cos(camera.pan)*cos(camera.tilt)*300000;
  temp.y=sin(camera.pan)*cos(camera.tilt)*300000;
  temp.z=sin(camera.tilt)*300000;
  phent_addforcelocal(my,temp,nullvector);

  sleep(5);
  ent_remove(my);
}

this could work...

Re: some a6 physics questions #15417 04/27/03 01:40 04/27/03 01:40
Joined: Jun 2002 Posts: 473 Juff Senior Member
Juff Senior Member Joined: Jun 2002 Posts: 473	thanks alot but I need one more thing I want it so that if you press the left mouse button, you can't shoot another ball for 5 seconds, so I don't get that error thanks click me

Re: some a6 physics questions #15418
04/27/03 01:44 04/27/03 01:44

Joined: May 2002
Posts: 7,441

ventilator Offline

OP
Senior Expert

ventilator Offline

OP
Senior Expert

Joined: May 2002
Posts: 7,441

code:

action sphere
{
  my.shadow=on;
  phent_settype(my, PH_RIGID, PH_SPHERE);
  phent_setmass(my, 5, PH_SPHERE);
  phent_setfriction(my, 70);
  phent_setelasticity(my, 50, 10);
  phent_setdamping(my, 20, 20 );
  temp.x=cos(camera.pan)*cos(camera.tilt)*300000;
  temp.y=sin(camera.pan)*cos(camera.tilt)*300000;
  temp.z=sin(camera.tilt)*300000;
  phent_addforcelocal(my,temp,nullvector);


  on_mouse_left=null;
  sleep(5);
  on_mouse_left=emit_sphere; 
  ent_remove(my);
}

...could work! [Smile]

Re: some a6 physics questions #15419 04/27/03 01:49 04/27/03 01:49
Joined: Mar 2003 Posts: 5,377 USofA fastlane69 Senior Expert
fastlane69 Senior Expert Joined: Mar 2003 Posts: 5,377 USofA	Hey, since we talking about wheels, let me ask this: Is rotational inertia ("I") implemented? It doesn't seem to be. There is a setMass, but no setRotInertia or the like. In the absense of "I", it would be more accurate to say that we can impart entities with a set angular acceleration and that __torque has nothing to do with it__. The help files even say this: "The torque vector can be visualized as the axis of desired rotation and the magnitude of this vector determines the desired acceleration" By this definition, I'm guessing you use a unit "I" for all rotations so that Torque = Angular Accelration x 1 However, the definition of mass states that "...Thus by increasing an object�s mass you will have to use a stronger force (or torque) to make them move..." by which I believe that Torque = Angular Acceleration x Mass If I'm mistaken or if "I" will be implemented later, I would like to know so I don't have to implement it myself. Otherwise a verification of which equation is actually used would be most helpful! FUTUR-E-SCAPE: The Future Landscape of Education and Entertainment.

Re: some a6 physics questions #15420 04/27/03 02:00 04/27/03 02:00
Joined: May 2002 Posts: 7,441 ventilator OP Senior Expert
ventilator OP Senior Expert Joined: May 2002 Posts: 7,441	quote: An object's hulltype determines its resistance to torque and thus the way it rotates. You can use one of the predefined constants to use an approximation of the object's shape or use PH_POLY to deduce the actual shape. maybe this is what you are looking for?

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