Moving physic objects to specific pos

I need to move a physic object to a specific position in my level. The problem is that there is object blocking a straight way, so setting the line velocity is hard but not impossible. Is there any way to set the x, y and z pos of a physic object and send it to bullet? I have tried this:

Code:


_SIO2object->_SIO2transform->loc->x = a random number;
_SIO2object->_SIO2transform->loc->y = one more random;
_SIO2object->_SIO2transform->loc->z = 5;
   
sio2TransformBindMatrix(bots[i].botObj->_SIO2transform);
btMatrix3x3 mat3;
mat3.setFromOpenGLSubMatrix( (btScalar *)bots[i].botObj->_SIO2transform->mat );
bots[i].botObj->_btRigidBody->getWorldTransform().setBasis( mat3 );

but the object is still in the same pos. And another problem is that the object often becomes invisible after this(disappears from the screen) and I have to move the camera around for a while before I can see it again, there is definitely some thing wrong with the resource culling for me.

Use this:

_SIO2object->_btRigidBody->getWorldTransform().setFromOpenGLMatrix( _SIO2object->_SIO2transform->mat );

Thanks!

does the line

_SIO2object->_btRigidBody->getWorldTransform().setFromOpenGLMatrix( _SIO2object->_SIO2transform->mat );

go after sio2ObjectRender or should it be called after the transforms??

oh, and is it correct to call sio2PhysicPause before the transforms and sio2PhysicPlay right after sio2TransformApply ?

Thanks

sctm81 wrote:does the line

_SIO2object->_btRigidBody->getWorldTransform().setFromOpenGLMatrix( _SIO2object->_SIO2transform->mat );

go after sio2ObjectRender or should it be called after the transforms??

oh, and is it correct to call sio2PhysicPause before the transforms and sio2PhysicPlay right after sio2TransformApply ?

Thanks

What doing this functions sio2PhysicPlay, sio2PhysicPause ?

If i add physics for my object but not run sio2PhysicPlay then my object not access physics?

You got it... you need to call sio2PhysicPlay in order to let Bullet take over...

Hi, All,

May I ask actually which specific postion has the above code moved the object to?

If I am not wrong, _SIO2object->_SIO2transform->mat should be a pointer to float. So can you please give some more complete codes?

And another question: what if the _SIO2object is originally set as stactic, such as the plane, and later I want to move it to a specific position?

Thanks and Regards,
djjd

Hi, All,

I tried the following code. It seems working.

_SIO2object->_SIO2transform->loc->x = a;
_SIO2object->_SIO2transform->loc->y = b;
_SIO2object->_SIO2transform->loc->z = c;

sio2TransformBindMatrix(_SIO2object->_SIO2transform);
_SIO2object->_btRigidBody->getWorldTransform().setFromOpenGLMatrix( _SIO2object->_SIO2transform->mat );

Thanks and Regards,
djjd

that's right and like that when you call sio2PhysicResetAll the physic body will be placed back to its original position... this is the best way to manipulate objects with physic.