using System.Diagnostics;
using UnityEngine;

public static class NGUIMath
{
	[DebuggerHidden]
	[DebuggerStepThrough]
	public static float Lerp(float from, float to, float factor)
	{
		return from * (1f - factor) + to * factor;
	}

	[DebuggerHidden]
	[DebuggerStepThrough]
	public static int RepeatIndex(int val, int max)
	{
		if (max < 1)
		{
			return 0;
		}
		while (val < 0)
		{
			val += max;
		}
		while (val >= max)
		{
			val -= max;
		}
		return val;
	}

	public static Rect ConvertToTexCoords(Rect rect, int width, int height)
	{
		Rect result = rect;
		if ((float)width != 0f && (float)height != 0f)
		{
			result.xMin = rect.xMin / (float)width;
			result.xMax = rect.xMax / (float)width;
			result.yMin = 1f - rect.yMax / (float)height;
			result.yMax = 1f - rect.yMin / (float)height;
		}
		return result;
	}

	public static Rect ConvertToPixels(Rect rect, int width, int height, bool round)
	{
		Rect result = rect;
		if (round)
		{
			result.xMin = Mathf.RoundToInt(rect.xMin * (float)width);
			result.xMax = Mathf.RoundToInt(rect.xMax * (float)width);
			result.yMin = Mathf.RoundToInt((1f - rect.yMax) * (float)height);
			result.yMax = Mathf.RoundToInt((1f - rect.yMin) * (float)height);
		}
		else
		{
			result.xMin = rect.xMin * (float)width;
			result.xMax = rect.xMax * (float)width;
			result.yMin = (1f - rect.yMax) * (float)height;
			result.yMax = (1f - rect.yMin) * (float)height;
		}
		return result;
	}

	public static Bounds CalculateAbsoluteWidgetBounds(Transform trans)
	{
		if (trans != null)
		{
			UIWidget[] componentsInChildren = trans.GetComponentsInChildren<UIWidget>();
			if (componentsInChildren.Length == 0)
			{
				return new Bounds(trans.position, Vector3.zero);
			}
			Vector3 center = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
			Vector3 point = new Vector3(float.MinValue, float.MinValue, float.MinValue);
			int i = 0;
			for (int num = componentsInChildren.Length; i < num; i++)
			{
				UIWidget uIWidget = componentsInChildren[i];
				if (!uIWidget.enabled)
				{
					continue;
				}
				Vector3[] worldCorners = uIWidget.worldCorners;
				for (int j = 0; j < 4; j++)
				{
					Vector3 vector = worldCorners[j];
					if (vector.x > point.x)
					{
						point.x = vector.x;
					}
					if (vector.y > point.y)
					{
						point.y = vector.y;
					}
					if (vector.z > point.z)
					{
						point.z = vector.z;
					}
					if (vector.x < center.x)
					{
						center.x = vector.x;
					}
					if (vector.y < center.y)
					{
						center.y = vector.y;
					}
					if (vector.z < center.z)
					{
						center.z = vector.z;
					}
				}
			}
			Bounds result = new Bounds(center, Vector3.zero);
			result.Encapsulate(point);
			return result;
		}
		return new Bounds(Vector3.zero, Vector3.zero);
	}

	public static Bounds CalculateRelativeWidgetBounds(Transform trans)
	{
		return CalculateRelativeWidgetBounds(trans, trans, considerInactive: false);
	}

	public static Bounds CalculateRelativeWidgetBounds(Transform trans, bool considerInactive)
	{
		return CalculateRelativeWidgetBounds(trans, trans, considerInactive);
	}

	public static Bounds CalculateRelativeWidgetBounds(Transform relativeTo, Transform content)
	{
		return CalculateRelativeWidgetBounds(relativeTo, content, considerInactive: false);
	}

	public static Bounds CalculateRelativeWidgetBounds(Transform relativeTo, Transform content, bool considerInactive, bool considerChildren = true)
	{
		if (content != null && relativeTo != null)
		{
			bool isSet = false;
			Matrix4x4 toLocal = relativeTo.worldToLocalMatrix;
			Vector3 vMin = new Vector3(float.MaxValue, float.MaxValue, float.MaxValue);
			Vector3 vMax = new Vector3(float.MinValue, float.MinValue, float.MinValue);
			CalculateRelativeWidgetBounds(content, considerInactive, isRoot: true, ref toLocal, ref vMin, ref vMax, ref isSet, considerChildren);
			if (isSet)
			{
				Bounds result = new Bounds(vMin, Vector3.zero);
				result.Encapsulate(vMax);
				return result;
			}
		}
		return new Bounds(Vector3.zero, Vector3.zero);
	}

	[DebuggerHidden]
	[DebuggerStepThrough]
	private static void CalculateRelativeWidgetBounds(Transform content, bool considerInactive, bool isRoot, ref Matrix4x4 toLocal, ref Vector3 vMin, ref Vector3 vMax, ref bool isSet, bool considerChildren)
	{
		if (content == null || (!considerInactive && !NGUITools.GetActive(content.gameObject)))
		{
			return;
		}
		UIPanel uIPanel = (isRoot ? null : content.GetComponent<UIPanel>());
		if (uIPanel != null && !uIPanel.enabled)
		{
			return;
		}
		if (uIPanel != null && uIPanel.clipping != UIDrawCall.Clipping.None)
		{
			Vector3[] worldCorners = uIPanel.worldCorners;
			for (int i = 0; i < 4; i++)
			{
				Vector3 vector = toLocal.MultiplyPoint3x4(worldCorners[i]);
				if (vector.x > vMax.x)
				{
					vMax.x = vector.x;
				}
				if (vector.y > vMax.y)
				{
					vMax.y = vector.y;
				}
				if (vector.z > vMax.z)
				{
					vMax.z = vector.z;
				}
				if (vector.x < vMin.x)
				{
					vMin.x = vector.x;
				}
				if (vector.y < vMin.y)
				{
					vMin.y = vector.y;
				}
				if (vector.z < vMin.z)
				{
					vMin.z = vector.z;
				}
				isSet = true;
			}
			return;
		}
		UIWidget component = content.GetComponent<UIWidget>();
		if (component != null && component.enabled)
		{
			Vector3[] worldCorners2 = component.worldCorners;
			for (int j = 0; j < 4; j++)
			{
				Vector3 vector2 = toLocal.MultiplyPoint3x4(worldCorners2[j]);
				if (vector2.x > vMax.x)
				{
					vMax.x = vector2.x;
				}
				if (vector2.y > vMax.y)
				{
					vMax.y = vector2.y;
				}
				if (vector2.z > vMax.z)
				{
					vMax.z = vector2.z;
				}
				if (vector2.x < vMin.x)
				{
					vMin.x = vector2.x;
				}
				if (vector2.y < vMin.y)
				{
					vMin.y = vector2.y;
				}
				if (vector2.z < vMin.z)
				{
					vMin.z = vector2.z;
				}
				isSet = true;
			}
			if (!considerChildren)
			{
				return;
			}
		}
		int k = 0;
		for (int childCount = content.childCount; k < childCount; k++)
		{
			CalculateRelativeWidgetBounds(content.GetChild(k), considerInactive, isRoot: false, ref toLocal, ref vMin, ref vMax, ref isSet, considerChildren: true);
		}
	}

	public static Vector3 SpringDampen(ref Vector3 velocity, float strength, float deltaTime)
	{
		if (deltaTime > 1f)
		{
			deltaTime = 1f;
		}
		float f = 1f - strength * 0.001f;
		int num = Mathf.RoundToInt(deltaTime * 1000f);
		float num2 = Mathf.Pow(f, num);
		Vector3 vector = velocity * ((num2 - 1f) / Mathf.Log(f));
		velocity *= num2;
		return vector * 0.06f;
	}

	public static Vector2 GetPivotOffset(UIWidget.Pivot pv)
	{
		Vector2 zero = Vector2.zero;
		switch (pv)
		{
		case UIWidget.Pivot.Top:
		case UIWidget.Pivot.Center:
		case UIWidget.Pivot.Bottom:
			zero.x = 0.5f;
			break;
		case UIWidget.Pivot.TopRight:
		case UIWidget.Pivot.Right:
		case UIWidget.Pivot.BottomRight:
			zero.x = 1f;
			break;
		default:
			zero.x = 0f;
			break;
		}
		switch (pv)
		{
		case UIWidget.Pivot.Left:
		case UIWidget.Pivot.Center:
		case UIWidget.Pivot.Right:
			zero.y = 0.5f;
			break;
		case UIWidget.Pivot.TopLeft:
		case UIWidget.Pivot.Top:
		case UIWidget.Pivot.TopRight:
			zero.y = 1f;
			break;
		default:
			zero.y = 0f;
			break;
		}
		return zero;
	}

	public static UIWidget.Pivot GetPivot(Vector2 offset)
	{
		if (offset.x == 0f)
		{
			if (offset.y == 0f)
			{
				return UIWidget.Pivot.BottomLeft;
			}
			if (offset.y == 1f)
			{
				return UIWidget.Pivot.TopLeft;
			}
			return UIWidget.Pivot.Left;
		}
		if (offset.x == 1f)
		{
			if (offset.y == 0f)
			{
				return UIWidget.Pivot.BottomRight;
			}
			if (offset.y == 1f)
			{
				return UIWidget.Pivot.TopRight;
			}
			return UIWidget.Pivot.Right;
		}
		if (offset.y == 0f)
		{
			return UIWidget.Pivot.Bottom;
		}
		if (offset.y == 1f)
		{
			return UIWidget.Pivot.Top;
		}
		return UIWidget.Pivot.Center;
	}

	public static void MoveRect(UIRect rect, float x, float y)
	{
		int num = Mathf.FloorToInt(x + 0.5f);
		int num2 = Mathf.FloorToInt(y + 0.5f);
		rect.cachedTransform.localPosition += new Vector3(num, num2);
		int num3 = 0;
		if ((bool)rect.leftAnchor.target)
		{
			num3++;
			rect.leftAnchor.absolute += num;
		}
		if ((bool)rect.rightAnchor.target)
		{
			num3++;
			rect.rightAnchor.absolute += num;
		}
		if ((bool)rect.bottomAnchor.target)
		{
			num3++;
			rect.bottomAnchor.absolute += num2;
		}
		if ((bool)rect.topAnchor.target)
		{
			num3++;
			rect.topAnchor.absolute += num2;
		}
		if (num3 != 0)
		{
			rect.UpdateAnchors();
		}
	}

	public static void AdjustWidget(UIWidget w, float left, float bottom, float right, float top)
	{
		AdjustWidget(w, left, bottom, right, top, 2, 2, 100000, 100000);
	}

	public static void AdjustWidget(UIWidget w, float left, float bottom, float right, float top, int minWidth, int minHeight, int maxWidth, int maxHeight)
	{
		Vector2 pivotOffset = w.pivotOffset;
		Transform cachedTransform = w.cachedTransform;
		Quaternion localRotation = cachedTransform.localRotation;
		int num = Mathf.FloorToInt(left + 0.5f);
		int num2 = Mathf.FloorToInt(bottom + 0.5f);
		int num3 = Mathf.FloorToInt(right + 0.5f);
		int num4 = Mathf.FloorToInt(top + 0.5f);
		if (pivotOffset.x == 0.5f && (num == 0 || num3 == 0))
		{
			num = num >> 1 << 1;
			num3 = num3 >> 1 << 1;
		}
		if (pivotOffset.y == 0.5f && (num2 == 0 || num4 == 0))
		{
			num2 = num2 >> 1 << 1;
			num4 = num4 >> 1 << 1;
		}
		Vector3 vector = localRotation * new Vector3(num, num4);
		Vector3 vector2 = localRotation * new Vector3(num3, num4);
		Vector3 vector3 = localRotation * new Vector3(num, num2);
		Vector3 vector4 = localRotation * new Vector3(num3, num2);
		Vector3 vector5 = localRotation * new Vector3(num, 0f);
		Vector3 vector6 = localRotation * new Vector3(num3, 0f);
		Vector3 vector7 = localRotation * new Vector3(0f, num4);
		Vector3 vector8 = localRotation * new Vector3(0f, num2);
		Vector3 zero = Vector3.zero;
		if (pivotOffset.x == 0f && pivotOffset.y == 1f)
		{
			zero.x = vector.x;
			zero.y = vector.y;
		}
		else if (pivotOffset.x == 1f && pivotOffset.y == 0f)
		{
			zero.x = vector4.x;
			zero.y = vector4.y;
		}
		else if (pivotOffset.x == 0f && pivotOffset.y == 0f)
		{
			zero.x = vector3.x;
			zero.y = vector3.y;
		}
		else if (pivotOffset.x == 1f && pivotOffset.y == 1f)
		{
			zero.x = vector2.x;
			zero.y = vector2.y;
		}
		else if (pivotOffset.x == 0f && pivotOffset.y == 0.5f)
		{
			zero.x = vector5.x + (vector7.x + vector8.x) * 0.5f;
			zero.y = vector5.y + (vector7.y + vector8.y) * 0.5f;
		}
		else if (pivotOffset.x == 1f && pivotOffset.y == 0.5f)
		{
			zero.x = vector6.x + (vector7.x + vector8.x) * 0.5f;
			zero.y = vector6.y + (vector7.y + vector8.y) * 0.5f;
		}
		else if (pivotOffset.x == 0.5f && pivotOffset.y == 1f)
		{
			zero.x = vector7.x + (vector5.x + vector6.x) * 0.5f;
			zero.y = vector7.y + (vector5.y + vector6.y) * 0.5f;
		}
		else if (pivotOffset.x == 0.5f && pivotOffset.y == 0f)
		{
			zero.x = vector8.x + (vector5.x + vector6.x) * 0.5f;
			zero.y = vector8.y + (vector5.y + vector6.y) * 0.5f;
		}
		else if (pivotOffset.x == 0.5f && pivotOffset.y == 0.5f)
		{
			zero.x = (vector5.x + vector6.x + vector7.x + vector8.x) * 0.5f;
			zero.y = (vector7.y + vector8.y + vector5.y + vector6.y) * 0.5f;
		}
		minWidth = Mathf.Max(minWidth, w.minWidth);
		minHeight = Mathf.Max(minHeight, w.minHeight);
		int num5 = w.width + num3 - num;
		int num6 = w.height + num4 - num2;
		Vector3 zero2 = Vector3.zero;
		int num7 = num5;
		if (num5 < minWidth)
		{
			num7 = minWidth;
		}
		else if (num5 > maxWidth)
		{
			num7 = maxWidth;
		}
		if (num5 != num7)
		{
			if (num != 0)
			{
				zero2.x -= Mathf.Lerp(num7 - num5, 0f, pivotOffset.x);
			}
			else
			{
				zero2.x += Mathf.Lerp(0f, num7 - num5, pivotOffset.x);
			}
			num5 = num7;
		}
		int num8 = num6;
		if (num6 < minHeight)
		{
			num8 = minHeight;
		}
		else if (num6 > maxHeight)
		{
			num8 = maxHeight;
		}
		if (num6 != num8)
		{
			if (num2 != 0)
			{
				zero2.y -= Mathf.Lerp(num8 - num6, 0f, pivotOffset.y);
			}
			else
			{
				zero2.y += Mathf.Lerp(0f, num8 - num6, pivotOffset.y);
			}
			num6 = num8;
		}
		if (pivotOffset.x == 0.5f)
		{
			num5 = num5 >> 1 << 1;
		}
		if (pivotOffset.y == 0.5f)
		{
			num6 = num6 >> 1 << 1;
		}
		Vector3 vector9 = (cachedTransform.localPosition = cachedTransform.localPosition + zero + localRotation * zero2);
		w.SetDimensions(num5, num6);
		if (w.isAnchored)
		{
			cachedTransform = cachedTransform.parent;
			float num9 = vector9.x - pivotOffset.x * (float)num5;
			float num10 = vector9.y - pivotOffset.y * (float)num6;
			if ((bool)w.leftAnchor.target)
			{
				w.leftAnchor.SetHorizontal(cachedTransform, num9);
			}
			if ((bool)w.rightAnchor.target)
			{
				w.rightAnchor.SetHorizontal(cachedTransform, num9 + (float)num5);
			}
			if ((bool)w.bottomAnchor.target)
			{
				w.bottomAnchor.SetVertical(cachedTransform, num10);
			}
			if ((bool)w.topAnchor.target)
			{
				w.topAnchor.SetVertical(cachedTransform, num10 + (float)num6);
			}
		}
	}

	public static int AdjustByDPI(float height)
	{
		float num = Screen.dpi;
		RuntimePlatform platform = Application.platform;
		if (num == 0f)
		{
			num = ((platform == RuntimePlatform.Android || platform == RuntimePlatform.IPhonePlayer) ? 160f : 96f);
		}
		int num2 = Mathf.RoundToInt(height * (96f / num));
		if ((num2 & 1) == 1)
		{
			num2++;
		}
		return num2;
	}
}