UnityRef is currently in early development. Some features may be incomplete and/or not functioning.

UNITYREF

Your Pit Stop For Solving ANYTHING in Unity

architecture

[Splines] Fix Dynamic Path Switching at Runtime

Under Audit

pathfinding

Unity 2022.3.x - Unity 6.x

Published Thu, Mar 12

This issue describes how objects following a Spline may need to dynamically switch to an alternate path at runtime, especially when not utilizing the SplineAnimate component.

Issue

 The Splines package facilitates the creation of complex movement paths for objects. A common challenge arises when an object needs to dynamically switch between multiple pre-defined Spline instances at runtime. For example, a SplineContainer might hold several connected Spline assets, representing branching paths. The object is initially assigned to follow one specific path, such as Spline 0. The core issue is determining how to transition the object's movement from the current Spline (e.g., Spline 0) to an alternate Spline (e.g., Spline 1) during gameplay. This is particularly relevant when the built-in SplineAnimate component is not being used, requiring a custom approach to manage the object's position along the path. The challenge involves correctly identifying the target path and then accurately calculating the object's new position and orientation along that chosen path to ensure a smooth transition.

Experimental Fixes
  • Implement a custom script to directly manage the object’s position and rotation by querying ISpline instances within the SplineContainer and performing manual path calculations.
  • Utilize the SplineContainer.Splines property to access all available splines and dynamically assign the target path based on runtime conditions.
  • When switching, ensure the object’s current position is mapped to the closest point on the new target path to prevent jarring jumps.

Editor's Note:

The above fixes have not been verified by our audit team yet. They are provided exclusively for your own technical research. We recommend creating a backup of your project before proceeding with any attempts. Utilize at your own discretion!

Related Posts Haven't quite found a solution to your problem? We think these posts might help you.

Content inspired by a Unity discussion post.