Simple and free spring library for Unity, perfect for animating UI or game elements in your project, heavily inspired by https://www.react-spring.dev/.
Open your Unity package Manager, press "Add package from git url" and enter the following URL:
https://github.com/mashlol/SimpleUnitySprings.git
The Spring class lets you animate a single float value.
Movie_007.webm
using SimpleUnitySprings;
using UnityEngine;
public class MyBehaviour : MonoBehaviour {
private Spring spring;
private void Start() {
spring = new(
config: SpringConfig.Create(tension: 600, friction: 3),
from: 1,
to: 2f);
}
private void Update() {
spring.Tick(Time.deltaTime);
transform.localScale = Vector3.one * spring.Get();
}
}The Vector3Spring class lets you animate a Vector3 value.
Movie_006.webm
using SimpleUnitySprings;
using UnityEngine;
public class MyBehaviour : MonoBehaviour {
private Vector3Spring spring;
private void Start() {
spring = new(
config: SpringConfig.Create(tension: 600, friction: 30),
from: new Vector3(-6.5f, -2.2f, -2f),
to: new Vector3(6.5f, 4f, -2f));
}
private void Update() {
spring.Tick(Time.deltaTime);
transform.position = spring.Get();
}
}You can pass any Spring into ChainableSpring to support chaining, so each
invocation of .To will queue until the previous has completed.
Movie_004.webm
using SimpleUnitySprings;
using UnityEngine;
public class MySpringChainingBehaviour : MonoBehaviour {
// Initialize a new Vector3 spring starting at position 0,0,0 and moving to 1,1,1
private ChainableSpring<Vector3> spring;
private void Start() {
spring = new(new Vector3Spring(
config: SpringConfig.Create(tension: 600, friction: 30),
from: new Vector3(-6.5f, -2.2f, -2f),
to: new Vector3(6.5f, 4f, -2f)));
// One at a time the spring will transition to each destination
spring
.To(new Vector3(-9, 5, 0))
.To(new Vector3(4, -1, -4.6f))
.To(new Vector3(0, 2f, -6.7f))
.To(Vector3.zero);
}
private void Update() {
spring.Tick(Time.deltaTime);
transform.position = spring.Get();
}
}A spring config tells the spring how to behave, and can either be created at runtime with SpringConfig.Create() or as a ScriptableObject in your project via Create -> Data -> SpringConfig.
It's recommended to use a ScriptableObject in your scene to share spring configs with multiple springs, as well as to be able to easily edit the configs at runtime to tweak values.
