[solved] Cant set freezePos when freezeRot(true)

Mardok · 05-27-2014 12:31 AM

I cant set actor.freezePos when freezeRot(1)

It's bug or physx limitation?

**Esenthel** · 05-27-2014 12:47 AM

Hi,

I've just tried modifying "multi shaped actors" tutorial:

Code:

/******************************************************************************/

Actor ground,

      ball  ,

      actor ;

/******************************************************************************/

void InitPre()

{

   EE_INIT();

   App.flag=APP_MS_EXCLUSIVE;

}

bool Init()

{

   Cam.dist=4;

   Physics.create(EE_PHYSX_DLL_PATH); // create physics by specifying the path to physx dll's

   ground .create(Box (15, 1, 15, Vec(0, -2, 0)), 0);

   ball   .create(Ball(0.3, Vec(0, 1.3, 0)));

   ActorShapes shapes;                           // actor shapes

   shapes.add(Box (0.2                       )); // add box  to 'shapes'

   shapes.add(Ball(0.2,     Vec(-0.3, 0.2, 0))); // add ball to 'shapes'

   shapes.add(Ball(0.2,     Vec( 0.3, 0.2, 0))); // add ball to 'shapes'

   actor.create(shapes).pos(Vec( 0.0, 0.3, 0) ); // create actor from 'shapes'

   actor.orn(Matrix3().setRotateZ(0.5));

   actor.freezeRot(true).freezePos(true);

   return true;

}

/******************************************************************************/

void Shut()

{

}

/******************************************************************************/

bool Update()

{

   if(Kb.bp(KB_ESC))return false;

   CamHandle(0.1, 10, CAMH_ZOOM|CAMH_ROT);

   Physics.startSimulation().stopSimulation();

   return true;

}

/******************************************************************************/

void Draw()

{

   D      .clear();

   Physics.draw ();

}

/******************************************************************************/

and it works fine

Mardok · 05-27-2014 12:54 AM

Press "Z" to set freezePos(1);

Code:

Actor ground, ball;

void InitPre()

{

   EE_INIT();

   App.flag=APP_MS_EXCLUSIVE;

}

bool Init()

{

   Cam.dist=4;

   Physics.create(EE_PHYSX_DLL_PATH); 

   ground.create(Box (15, 1, 15, Vec(0.0, -2, 0)), 0);  

   ball  .create(Ball(0.3      , Vec(0.0,  0, 0)));

   ball.freezeRot(1);

   return true;

}

void Shut(){}

bool Update()

{

   if(Kb.bp(KB_ESC))return false;

   CamHandle(0.1, 10, CAMH_ZOOM|CAMH_ROT);

   {

      Physics.startSimulation(); 

      Physics.stopSimulation(); 

   }

   flt s=3;

   if(Kb.bp((KB_Z)))ball.freezePos(1);

   if(Kb.b(KB_W))ball.addForce( !PointOnPlane(Cam.matrix.z, Vec(0, 1, 0))*s);

   if(Kb.b(KB_S))ball.addForce(-!PointOnPlane(Cam.matrix.z, Vec(0, 1, 0))*s);

   if(Kb.b(KB_A))ball.addForce(-!PointOnPlane(Cam.matrix.x, Vec(0, 1, 0))*s);

   if(Kb.b(KB_D))ball.addForce( !PointOnPlane(Cam.matrix.x, Vec(0, 1, 0))*s);

   return true;

}

void Draw()

{

   D      .clear();

   Physics.draw (); 

}

**Esenthel** · 05-27-2014 01:05 AM

Thank you!

I'm investigating this

**Esenthel** · 05-27-2014 01:22 AM

Thank you for reporting this issue!
I was able to find a fix, it will work OK in next release.

Mardok · 06-08-2014 02:03 AM

Hi Grzegorz,

Problem is still there but situation was changed.

When i set freezePos(1) to actor with freezeRot(1) then actor.pos is changing to actor base position defined in actor.create function.

Try it. Press Q to set freezePos(1)

Code:

/******************************************************************************/

Actor ground,

      box   ,

      ball  ;

/******************************************************************************/

void InitPre()

{

   EE_INIT();

   App.flag=APP_MS_EXCLUSIVE;

}

bool Init()

{

   Cam.dist=4;

   // create physics

   Physics.create(EE_PHYSX_DLL_PATH); // create physics by specifying the path to physx dll's

   // create actors

   ground.create(Box (15, 1, 15, Vec(0.0, -2, 0)), 0); // create ground actor from Box and density=0 (which means it's a static actor - will not move)

   box   .create(Box (0.3      , Vec(0.1,  1, 0)));

   ball  .create(Ball(0.3      , Vec(0.0,  0, 0)));

   ball.freezeRot(1);

   return true; 

}

/******************************************************************************/

void Shut()

{

}

/******************************************************************************/

bool Update()

{

   if(Kb.bp(KB_ESC))return false;

   CamHandle(0.1, 10, CAMH_ZOOM|CAMH_ROT);

   // physics update

   {

      Physics.startSimulation(); // start frame simulation

      // physics simulation takes some time, so you can do some calculations here

      // important : you may not modify actors between Physics.startSimulation() and Physics.stopSimulation()

      Physics.stopSimulation(); // get results of frame simulation

   }

   if(Kb.bp(KB_Q))ball.freezePos(!ball.freezePos());

   flt s=3;

   // add forces to ball according to camera

   if(Kb.b(KB_W))ball.addForce( !PointOnPlane(Cam.matrix.z, Vec(0, 1, 0))*s);

   if(Kb.b(KB_S))ball.addForce(-!PointOnPlane(Cam.matrix.z, Vec(0, 1, 0))*s);

   if(Kb.b(KB_A))ball.addForce(-!PointOnPlane(Cam.matrix.x, Vec(0, 1, 0))*s);

   if(Kb.b(KB_D))ball.addForce( !PointOnPlane(Cam.matrix.x, Vec(0, 1, 0))*s);

   // add velocity to ball

   if(Kb.bp(KB_SPACE))ball.addVel(Vec(0, 3, 0));

   return true;

}

/******************************************************************************/

void Draw()

{

   D      .clear();

   Physics.draw (); // draw physical actors

}

/******************************************************************************/

And there is a second problem. When we set freezePos(0) to actor which is in the air then actor is neutral to gravity. Actor will be in the air as long as we use some force.

**Esenthel** · 06-08-2014 02:36 AM

Thank you, I'm checking this.

**Esenthel** · 06-08-2014 02:43 AM

I'll try to fix this and upload an update today ASAP.

Mardok · 06-08-2014 02:56 AM

Ok thx. I'm working on a puzzle game, and I need it in certain situations.

Good night...

**Esenthel** · 06-08-2014 04:32 AM

The fix has just been uploaded, please let me know if you'll encounter any other issues.
Thank you! smile

Mardok · 06-08-2014 01:04 PM

Great, now all is fine.

thx

[solved] Cant set freezePos when freezeRot(true)
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