Stylized Grass v1.2.1 - Set perspective correction direction

using UnityEngine;
using UnityEngine.Rendering;

namespace StylizedGrass
{
    [ExecuteInEditMode]
    public class SetGrassForwardDir : MonoBehaviour
    {
        private static readonly int _CameraForwardVector = Shader.PropertyToID("_CameraForwardVector");
        private Vector4 vector;

        private void OnEnable()
        {
            RenderPipelineManager.beginCameraRendering += OnCameraRender;
        }

        private void OnDisable()
        {
            RenderPipelineManager.beginCameraRendering -= OnCameraRender;

            Shader.SetGlobalVector(_CameraForwardVector, Vector4.zero);
        }

        private void OnCameraRender(ScriptableRenderContext context, Camera targetCamera)
        {
            vector = targetCamera.transform.forward;
            //If the .w component is 1, the shader starts using this vector
            vector.w = 1f;

            Shader.SetGlobalVector(_CameraForwardVector, vector);
        }
    }
}