Collision Settings¶

The following section details the setting which need to be applied to the collision body to react appropriately in the collision simulation.

A lot of these setting are Havok-specific. We’ve mapped them to Blender’s collision simluation wherever possible.

Enabling Rigid Body Collisions¶

First, we enable Rigid Body Collision for the selected collision Object:

In the Physics tab, click on Rigid Body to enable.
Meshes with collision enabled will be exported as a collision object rather than a NiTriShape.

Go to the Physics tab in the Properties area.
Click on Rigid Body to enable this modifier.

Rigid Body Panel¶

The Rigid Body Panel is contains the properties to define how the object will react in the physics simulation.

Settings Section¶

Mass property used to give the collision object some weight

Collision Section¶

Shape is used to map to various collision types. The following table shows what they will map to. A combinaion of the type and Blender object name is used to define the output type.

Blender	Blender Object Name	Nif
`Triangle Mesh Collision`_	RootCollisionNode	`bounding_box`
`Box Collision`_	BSBound	`BSBound`
`Box Collision`_	BoundingBox	`NiNode`

Oblivion, Fallout 3, and Fallout NV use bhk-based shapes

Blender	Nif
`Box Collision`_	`bhkBoxShape`
`Sphere Collision`_	`bhkSphereShape`
`Capsule Collision`_	`bhkCapsuleShape`
`Convex Hull Collision`_	`bhkConvexVerticesShape`
`Triangle Mesh Collision`_	`bhkMoppBvTreeShape`

Surface Response Section¶

In the Surface Response section the following are mapped to nif properties

Friction : How smooth its surfaces is and how easily it will slide along other bodies
Restitution : How “bouncy” the body is, i.e. how much energy it has after colliding. Less than 1.0 loses energy, greater than 1.0 gains energy.

Sensitivity Section¶

In the Surface Response section, enable the collsion margin.

Margin : This is an area around the mesh that allows for quick but less accurate collision detection.

Dynamics Section¶

In the Surface Response section, the following are mapped to nif properties:

linear_damping : Reduces the movement of the body over time. A value of 0.1 will remove 10% of the linear velocity every second.
angular_damping : Reduces the movement of the body over time. A value of 0.05 will remove 5% of the angular velocity every second.

Enable the Deactivation checkbox to access the following settings:

Deactivate Linear velocity : Linear velocity
Deactivate Angular Velocity : Angular velocity

Custom Niftools Settings¶

The following describe custom Nif-specific settings that don’t map directly to Blender settings currently:

Todo

A lot of the items below need to be better-defined.

The Havok Material decides how the material should behave for collisions, e.g., sounds, decals, etc.

Select a Havok Material from the drop-down box.

The Collision Filter Flags determines…things.

Set the Col Filter to the appropriate number.

The Deactivator Type determines…things

Select a Deactivator Type from the drop-down box.

The Solver Deactivator determines…things.

Select a Solver Deactivator from the drop-down box.

The Quality Type determines…things.

Select a Quality Type from the drop-down box.

The Oblivion Layer determines…things.

Select an Oblivion Layer from the drop-down box.

The Max Linear Velocity determines the maximum linear velocity this collision object may have.

Set the Max Linear Velocity to the appropriate number.

The Max Angular Velocity determines the maximum angular velocity this collision object may have.

Set the Max Angular Velocity to the appropriate number.

The Motion System determines…things.

Select a Motion System from the drop-down box.

Collision Settings

Table of Contents

Quick search