using UnityEngine;

[AddComponentMenu("Modifiers/Vertical Noise")]
public class MegaVertNoise : MegaModifier
{
	public float Scale = 1f;

	public bool Fractal;

	public float Freq = 0.25f;

	public float Iterations = 6f;

	public bool Animate;

	public float Phase;

	public float Rough;

	public float Strength;

	private MegaPerlin iperlin = MegaPerlin.Instance;

	private float time;

	private float scale;

	private float rt;

	public float decay;

	public override string ModName()
	{
		return "Vertical Noise";
	}

	public override string GetHelpURL()
	{
		return "?page_id=1063";
	}

	public override void Modify(MegaModifiers mc)
	{
		for (int i = 0; i < verts.Length; i++)
		{
			Vector3 point = tm.MultiplyPoint3x4(verts[i]);
			float y = point.y;
			float x = point.x * scale + 0.5f;
			float y2 = point.z * scale + 0.5f;
			float f = Mathf.Sqrt(point.x * point.x + point.z * point.z);
			float num = Mathf.Exp((0f - decay) * Mathf.Abs(f));
			float num2 = 0f;
			num2 = ((!Fractal) ? iperlin.Noise(x, y2, time) : iperlin.fBm1(x, y2, time, rt, 2f, Iterations));
			point.y += num2 * Strength;
			point.y = y + (point.y - y) * num;
			sverts[i] = invtm.MultiplyPoint3x4(point);
		}
	}

	public override void ModStart(MegaModifiers mc)
	{
	}

	public override Vector3 Map(int i, Vector3 p)
	{
		p = tm.MultiplyPoint3x4(p);
		float y = p.y;
		float f = Mathf.Sqrt(p.x * p.x + p.z * p.z);
		float num = Mathf.Exp((0f - decay) * Mathf.Abs(f));
		float x = p.x * scale + 0.5f;
		float y2 = p.z * scale + 0.5f;
		float num2 = 0f;
		num2 = ((!Fractal) ? iperlin.Noise(x, y2, time) : iperlin.fBm1(x, y2, time, rt, 2f, Iterations));
		p.y += num2 * Strength;
		p.y = y + (p.y - y) * num;
		return invtm.MultiplyPoint3x4(p);
	}

	public override bool ModLateUpdate(MegaModContext mc)
	{
		if (Animate)
		{
			Phase += Time.deltaTime * Freq;
		}
		time = Phase;
		return Prepare(mc);
	}

	public override bool Prepare(MegaModContext mc)
	{
		if (Scale == 0f)
		{
			scale = 1E-06f;
		}
		else
		{
			scale = 1f / Scale;
		}
		rt = 1f - Rough;
		return true;
	}
}