Creating a physics scene is Director is simple. Let us follow the 5 step process:

  1. Create a 3d world ( name it ‘3d_scene’ ) using menu Insert-> Media Element -> Shockwave 3d
  2. Create a physics world ( name it ‘physX’ )using menu Insert -> Media Element -> Physics
  3. Create a behavior script ( click on menu Window-> Script , set the type to behavior ) with the following code say physics_init ( just a random name i gave )
    4. property pDirPhyz
property pTimeStep,pSubSteps
on endSprite me
--if the physics world is initialized, then stop it on endsprite
if (pDirPhyz.isInitialized = 1) then
pDirPhyz.destroy()
end if
end
 
--step physics on every exit frame
 
on exitFrame me
-- Step the physics
pDirPhyz.simulate()
end exitFrame
 
on beginSprite me
--get a handler for physX
pDirPhyz = member("physX")
pTimeStep = 0.025
pSubSteps = 5
--hook the physics world to the 3d world
pDirPhyz.Init(member("3d_scene"), vector(1,1,1),#equal, pTimeStep, pSubSteps )
 
pDirPhyz.gravity = vector(0,-9.8,0)
pDirPhyz.contacttolerance = 0.02
pDirPhyz.friction = 0.8
pDirPhyz.lineardamping = 0.4
pDirPhyz.angulardamping = 0.4
pDirPhyz.restitution = 0.5
-- put "Initialized Physics"
end
  4. From the cast member window , drag and drop the behavior on to the 3d world placed on the stage ( place the 3d world on the stage if you have not already done so :) )
  5. To create a simple sphere in 3d and make it a rigidbody , use the following code, make a movie script:
    6. on startmovie
g3d_scene = member("3d_scene")
BallRes = g3d_scene.newModelResource("sphere", #sphere)
BallRes.radius = 10
BallRes.resolution = 6 --create a model out of the resource
Ball = g3d_scene.newModel("Ball" ,BallRes)
Ball.addmodifier(#meshdeform)
--create rigidbodies out of the spheres created above
physX = member("physX")
--read the doc/help in Director :)
rb_ball  = physX.createRigidBody(Ball.name,Ball.name,#sphere,#dynamic)
rb_ball.mass = 100
end

That should do it, run the movie and see the ball fall under gravity :). Let us know if this helped…