Add feature controlling number of landing particles based on fall distance

UOP1_Project/Assets/Scripts/Characters/StateMachine/Actions/PlayLandParticlesActionSO.cs

 {
 	//Component references
 	private DustParticlesController _dustController;
+	private Transform _transform;
+
+	private float _fallStartY = 0;
+	private float _fallEndY = 0;
+	private float _maxFallDistance = 4; //Used to adjust particle emission intensity
+		_transform = stateMachine.transform;
+	}
+
+	public override void OnStateEnter()
+	{
+		_fallStartY = _transform.position.y;
+		_fallEndY = _transform.position.y;
+		float dY = _fallStartY - _fallEndY;
+		float fallIntensity = Mathf.InverseLerp(0, _maxFallDistance, dY);
+
-			_dustController.PlayLandParticles();
+			//_dustController.PlayLandParticles();
+			_dustController.PlayLandParticles(fallIntensity);
 			t = Time.time;
 		}
 	}

UOP1_Project/Assets/Scripts/Effects/DustParticlesController.cs

 	{
 		_landParticles.Play();
 	}
+
+	public void PlayLandParticles(float intensity)
+	{
+		// make sure intensity is always between 0 and 1
+		intensity = Mathf.Clamp01(intensity);
+
+		var main = _landParticles.main;
+		var origCurve = main.startSize; //save original curve to be assigned back to particle system
+		ParticleSystem.MinMaxCurve newCurve = main.startSize; //Make a new minMax curve and make our changes to the new copy
+
+		float minSize = newCurve.constantMin;
+		float maxSize = newCurve.constantMax;
+
+		// use the intensity to change the maximum size of the particle curve
+		newCurve.constantMax = Mathf.Lerp(minSize, maxSize, intensity);
+		main.startSize = newCurve;
+
+		_landParticles.Play();
+
+		// Put the original startSize back where you found it
+		StartCoroutine(ResetMinMaxCurve(_landParticles, origCurve));
+	}
+
+	private IEnumerator ResetMinMaxCurve(ParticleSystem ps, ParticleSystem.MinMaxCurve curve)
+	{
+		while (ps.isEmitting)
+		{
+			yield return null;
+		}
+
+		var main = ps.main;
+		main.startSize = curve;
+	}
 }