private void BuildAreas()
{
var rPrevAreas = new List <AreaAABB>(this.mCurrentAreas);
this.mCurrentAreas.Clear();
// 找到所有的区域与区域之间线段的交点
for (int i = 0; i < rPrevAreas.Count; i++)
{
rPrevAreas[i].InitSides();
this.BuildArea(rPrevAreas[i]);
mCurrentAreas.Add(rPrevAreas[i]);
}
// 根据线段的交点找到哪些线是需要隐藏的
for (int i = 1; i < mCurrentAreas.Count; i++)
{
for (int j = 0; j < i; j++)
{
for (int k = 0; k < mCurrentAreas[i].Sides.Count; k++)
{
AreaSide rSide = mCurrentAreas[i].Sides[k];
for (int p = 0; p < rSide.Lines.Count; p++)
{
if (mCurrentAreas[j].IsContainLine(rSide.Lines[p]))
{
rSide.Lines[p].State = 1;
}
}
}
}
}
for (int i = 0; i < mCurrentAreas.Count; i++)
{
// 找Area中的线所在的所有所属区域
for (int j = 0; j < mCurrentAreas[i].Sides.Count; j++)
{
for (int k = 0; k < mCurrentAreas[i].Sides[j].Lines.Count; k++)
{
Line rLine = mCurrentAreas[i].Sides[j].Lines[k];
AreaAABB rHighestOrderArea = GetHighestOrderArea(rLine, mCurrentAreas[i]);
if (rHighestOrderArea != null)
{
if (rHighestOrderArea.UID == mCurrentAreas[i].UID)
{
rLine.State = 1;
}
}
}
}
}
}
public void InitSides()
{
this.Sides = new List <AreaSide>();
AreaSide rDownSide = new AreaSide()
{
Index = 0, Points = new List <Vector3>()
};
rDownSide.EdgeLine = new Line()
{
Start = this.Rect.Min, End = new Vector3(this.Rect.Max.x, 0, this.Rect.Min.z)
}; // min.z 一样
rDownSide.SortPoints();
this.Sides.Add(rDownSide);
AreaSide rRightSide = new AreaSide()
{
Index = 1, Points = new List <Vector3>()
};
rRightSide.EdgeLine = new Line()
{
Start = new Vector3(this.Rect.Max.x, 0, this.Rect.Min.z), End = this.Rect.Max
}; // Max.x 一样
rRightSide.SortPoints();
this.Sides.Add(rRightSide);
AreaSide rUpSide = new AreaSide()
{
Index = 2, Points = new List <Vector3>()
};
rUpSide.EdgeLine = new Line()
{
Start = this.Rect.Max, End = new Vector3(this.Rect.Min.x, 0, this.Rect.Max.z)
}; // Max.z 一样
rUpSide.SortPoints();
this.Sides.Add(rUpSide);
AreaSide rLeftSide = new AreaSide()
{
Index = 3, Points = new List <Vector3>()
};
rLeftSide.EdgeLine = new Line()
{
Start = new Vector3(this.Rect.Min.x, 0, this.Rect.Max.z), End = this.Rect.Min
}; // Min.x 一样
rLeftSide.SortPoints();
this.Sides.Add(rLeftSide);
}
/// <summary>
/// 判断一个Side是否和一个Area相交，如果相交了，分别把Side和AABB的边裁减成多个线段
/// </summary>
public void Intersect_Side_AreaAABB(AreaSide rSide, AreaAABB rArea)
{
List <Vector3> rTempPoints = new List <Vector3>(rSide.Points);
Line rLine = rSide.EdgeLine;
for (int j = 0; j < rArea.Sides.Count; j++)
{
List <Vector3> rTempAreaPoints = new List <Vector3>(rArea.Sides[j].Points);
Line rAreaLine = rArea.Sides[j].EdgeLine;
this.GetIntersectPoint_AABB(rLine, rAreaLine, rTempPoints, rTempAreaPoints);
rArea.Sides[j].Points = rTempAreaPoints;
rArea.Sides[j].SortPoints();
}
rSide.Points = rTempPoints;
rSide.SortPoints();
}
