PhysicSetPosition crashing

[YouGroove]

I have some ball projectile that works great using SetPosition(x,y,z)

But when i replace that with PhysicsSetPosition() it crashes ?

 

Here is the main loop code :

 

 

function Script:updatebullet()

       self.bullIncr = self.bullIncr + 0.05

       if self.bullActive == true then
       -- Offset towards direction to not collision with player
       pos = self.bullStartPoint + (self.bulldirN * 2 *  self.bullIncr)

       -- more above ground
       pos.y = 1.5 

       --self.bullet:SetPosition(pos.x,pos.y,pos.z )
       self.bullet:PhysicsSetPosition(pos.x,pos.y,pos.z , 1)
...

 

I used at start creation of the ball SetCollisionType for it to work with PhysicsSetPosition()

   self.bullet =  Model:Sphere()
    self.bullet:SetColor(1,1,1)
    self.bullet:SetMass(0)
    self.bullet:Show()
   self.bullet:SetCollisionType(Collision.Prop)   

 

What could be the problem ?

[Rick]

Try making it a Vec3() object you pass instead of x, y, z

 

self.bullet:PhysicsSetPosition(Vec3(pos.x, pos.y, pos.z), 1)

 

I think I remember someone saying the doc was wrong or something.

[YouGroove]

In lua it says error in function if i use Vec3 ?

-------------

Another question , at init, i just want to place the physic ball at a position , do i need to use PhysicSetPosition ?

or just SetPosition ?

and call PhysicsSetPosition only when moving the ball at updates ?

[Rick]

You can just use SetPosition() at start. SetPosition() breaks physics for that frame but since it's at start it doesn't matter.

 

Are you sure pos is a vec3 when it returns from your calculation? Did you put a breakpoint in and see what it contains?

[YouGroove]

Well using Vec3, the debugger says error in Function.

Using 4 parameters no roblem but it crashes.

I tried also 0,0,0 as position where there is no geometry but it crashes ?

 

Could it be mass = 0 the problem ? or physics= debris ?

 

Does anyone uses PhysiscSetPosition without problem ? (i remember some elevator example on workshop using that, i'll take a look)

[YouGroove]

Ok found the problem :

You must use a mass different from 0

 

Also if you want it to Physic collide and not path trhought physic object you have to simply also give it a shape as it's created by code :

 

self.bullet = Model:Sphere()
 self.bullet:SetColor(1,1,1)
 self.bullet:SetMass(0.02)
self.bullet:SetGravityMode(false)
self.bullet:Show()
self.bullet:SetCollisionType(Collision.Prop)

 --Create a shape
 local shape = Shape:Sphere(0,0,0, 0,0,0, 1,1,1)
 self.bullet:SetShape(shape)
 shape:Release()

 

 

 

ok i have bullet a stand alone prefab with it's own script and it works better.