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Comment: Scroll Documents: Update page title prefix

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Table of Contents

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Overview

Constraints the motion of a GameObject to translation over a Splineand rotation by Pitch and position along the Spline.

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Where to find

The Helical Joint can be found under Mechanics > Kinematics > Kinematic Joints > Helical Joint.

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The following inspector component will be shown:

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Feature layout

The image below shows the complete feature layout of the Helical Joint component.

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Generic Joint Settings

Pass Priority

Priority of the kinematic chain calculations. Higher numbers are calculated earlier.

Enforce Outside Playmode

Enforces the joint to work in edit mode.

Prevent Kinematic Update

Removes the joint from the kinematic chain calculations.

Prevent Further Kinematic Update on this GameObject

Allows lower priority kinematic transforms on the same GameObject to be skipped in calculations.

Allow Direct User Input

Allows the user to manipulate the joint with the scene gizmo.

Min. User Input Translation Offset

The minimum value the user must input before translations are applied.

Min. User Input Rotation Offset

The minimum value the user must input before rotations are applied.

Kinematic Chaining

Create new Leading Transform Relation

Creates a new relation between Transforms.

Opposing Relation Instance

The kinematic transform you want to link the joint to.

Relation Direction

Describes the direction of the manipulation of the Transforms. The following options are available:

  • BIDIRECTIONAL: Allows for both kinematic transforms, when they are being manipulated, to manipulate each other equally.

  • RECIEVE_ONLY: Allows for the joint, when it is being manipulated, to manipulate the opposing kinematic transform, but not the other way around.

  • SEND_ONLY: Allows for the opposing kinematic transform, when it is being manipulated, to manipulate the joint, but not the other way around.

Relation Type

Used when 2 different size Wheel Joints need the same rotational speed. The following options are available:

  • TRANSLATION: Translates the transforms using the Wheel Radius.

  • ROTATION: Translates the transforms without using the Wheel Radius.

Motion Direction is Reversed

When enabled, the manipulation to/from the opposing kinematic transform is inverted.

Helical Joint Settings

Pitch

The distance from the crest of one thread to the next.

Invert

When checked inverts the direction of the rotation.

Limit Relation & Update Settings

Spline

The Splinealong which the Helical Joint’s position and rotation is constrained.

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How to use

  1. Create a Splineand use it to define the path you want the Helical Joint to follow.

  2. Add the Spline to the Helical Joint and create a new Transform Relation, add an Opposing Relation Instance and define the other settings as needed.

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