3D Objects

Objects in 3D scenes

You can associate three types of objects with objects inside a 3DScene.

• Static objects. Never moves.

• Dynamic objects. Moved by the PhysX simulation.

• Kinematic objects. moved by the 3DScene.

Colliding

To collide within the PhysXScene, these objects need at least one collision 'shape' each.

3DSMax Parameters

You can assign PhysX parameters to a Mesh using 3DSMax. Place these parameters inside the mesh user buffer.

• The $Shader and $PhysX blocks are separate. Do not nest them.

• PhysX Meshes (at least Dynamic ones) must be exported in Object Space because they need the correct mesh's transform matrix.

Parameters

szActorType parameter

The actor type.

szShape parameter

The collision shape type.

fDensity parameter

The density of the object. This value is used to calculate the mass of the PhysX Actor. Static Actors do not need a mass.

• Range: [0..inf]

• Default: 1

bDrain parameter

This Actor is used to drain PhysX particles.

• Range: True, False.

• Default: False.

bSleep parameter

This Actor starts in sleep mode. Valid only for Dynamic Actors.

• Range: True, False.

• Default: False.

Code example for generic dynamic object

This is a code example for creating a generic dynamic object.

$PhysX

{

szActorType = Dynamic

szShape = BoundingBox

}

Code example for dynamic object

This is a code example that creates a dynamic object that starts in sleep mode. The object does not move until some collision kicks in.

$PhysX

{

szActorType = Dynamic

szShape = BoundingBox

fDensity = 1.1

bSleep = true

}

Code example for static object

This is a code example that creates a static object whose collision shape is its bounding box and is used to drain particles.

$PhysX

{

szActorType = Static

szShape = BoundingBox

fDensity = 1.2

bDrain = true

}

Code example of Mesh user buffer

This is an example of a Mesh user buffer. Note: that the two structures are separate.

$Shader

{

szName = Vc

}

$PhysX

{

szActorType = Dynamic

szShape = BoundingBox

}