stride3d.stride-docs/en/tutorials/csharpbeginner/linear-interpolation.md

Linear Interpolation

You can find this sample in the tutorial project: Menu → Linear Iterpolation

Explanation

This C# Beginner tutorial covers linear interpolation which is often shortened to 'Lerp'.

Sometimes you want to gradually change a value from a start value to a target value. This process is called linear interpolation.

Stride exposes several Lerp functions for various types. Among them are Vector2, Vector3 and Vector4.

[!Video https://www.youtube.com/embed/jBXGvLBwXqI]

Code

The example consists of a simple timer that resets after a couple seconds. When the timer starts, a start position and a randomly generated target position are stored. A box will move between these two positions.

Every frame a 'Lerp value' is calculated. The lerp value is used to determined what the current position of a moving box should be. Once the timer is done, the current position will become the start position and a new target position is again randomly generated.

[!code-csharpLerp]