using UnityEngine;

[AddComponentMenu("Modifiers/Conform")]
public class MegaConformMod : MegaModifier
{
	public GameObject target;

	public float[] offsets;

	public Collider conformCollider;

	public Bounds bounds;

	public float[] last;

	public Vector3[] last1;

	public Vector3[] conformedVerts;

	public float conformAmount = 1f;

	public float raystartoff;

	public float offset;

	public float raydist = 100f;

	public MegaAxis axis = MegaAxis.Y;

	private Matrix4x4 loctoworld;

	private Matrix4x4 ctm;

	private Matrix4x4 cinvtm;

	private Ray ray = default(Ray);

	private RaycastHit hit;

	public bool useLocalDown;

	public bool flipDown = true;

	public MegaAxis downAxis = MegaAxis.Y;

	public override string ModName()
	{
		return "Conform";
	}

	public override string GetHelpURL()
	{
		return "?page_id=4547";
	}

	public void SetTarget(GameObject targ)
	{
		target = targ;
		if ((bool)target)
		{
			conformCollider = target.GetComponent<Collider>();
		}
	}

	public override Vector3 Map(int i, Vector3 p)
	{
		return p;
	}

	public override void Modify(MegaModifiers mc)
	{
		if ((bool)conformCollider)
		{
			if (useLocalDown)
			{
				Vector3 vector = Vector3.down;
				switch (downAxis)
				{
				case MegaAxis.X:
					vector = base.transform.right;
					break;
				case MegaAxis.Y:
					vector = base.transform.up;
					break;
				case MegaAxis.Z:
					vector = base.transform.forward;
					break;
				}
				if (flipDown)
				{
					vector = -vector;
				}
				ray.direction = vector;
				Vector3 vector2 = -vector * raystartoff;
				Vector3 direction = ray.direction;
				Vector3 vector3 = -base.transform.InverseTransformDirection(direction);
				for (int i = 0; i < verts.Length; i++)
				{
					Vector3 origin = ctm.MultiplyPoint(verts[i]) - vector2;
					ray.origin = origin;
					sverts[i] = verts[i];
					if (conformCollider.Raycast(ray, out hit, raydist))
					{
						Vector3 vector4 = cinvtm.MultiplyPoint(hit.point);
						sverts[i] = Vector3.Lerp(verts[i], vector4 + vector3 * (offsets[i] + offset), conformAmount);
						last1[i] = sverts[i];
					}
					else
					{
						sverts[i] = last1[i];
					}
				}
				return;
			}
			int index = (int)axis;
			for (int j = 0; j < verts.Length; j++)
			{
				Vector3 origin2 = ctm.MultiplyPoint(verts[j]);
				origin2.y += raystartoff;
				ray.origin = origin2;
				ray.direction = Vector3.down;
				sverts[j] = verts[j];
				if (conformCollider.Raycast(ray, out hit, raydist))
				{
					Vector3 vector5 = cinvtm.MultiplyPoint(hit.point);
					sverts[j][index] = Mathf.Lerp(verts[j][index], vector5[index] + offsets[j] + offset, conformAmount);
					last[j] = sverts[j][index];
				}
				else
				{
					sverts[j][index] = last[j];
				}
			}
		}
		else
		{
			verts.CopyTo(sverts, 0);
		}
	}

	public override bool ModLateUpdate(MegaModContext mc)
	{
		return Prepare(mc);
	}

	public override bool Prepare(MegaModContext mc)
	{
		if ((bool)target)
		{
			if (conformCollider != target.GetComponent<Collider>())
			{
				conformCollider = target.GetComponent<Collider>();
			}
			if (conformCollider == null)
			{
				return false;
			}
			if (conformedVerts == null || conformedVerts.Length != mc.mod.verts.Length)
			{
				conformedVerts = new Vector3[mc.mod.verts.Length];
				offsets = new float[mc.mod.verts.Length];
				last = new float[mc.mod.verts.Length];
				for (int i = 0; i < mc.mod.verts.Length; i++)
				{
					offsets[i] = mc.mod.verts[i][(int)axis] - mc.bbox.min[(int)axis];
				}
			}
			if (useLocalDown && (last1 == null || last1.Length != last.Length))
			{
				last1 = new Vector3[last.Length];
			}
			loctoworld = base.transform.localToWorldMatrix;
			ctm = loctoworld;
			cinvtm = base.transform.worldToLocalMatrix;
			return true;
		}
		conformCollider = null;
		return true;
	}

	public void ChangeAxis()
	{
		MegaModifyObject component = GetComponent<MegaModifyObject>();
		if ((bool)component)
		{
			for (int i = 0; i < component.verts.Length; i++)
			{
				offsets[i] = component.verts[i][(int)axis] - component.bbox.min[(int)axis];
			}
		}
	}
}