/// <summary>
/// 顺时针围起来的是正
/// </summary>
/// <param name="points"></param>
public void addShape(Vector2[] points)
{
if (points.Length < 3)
return;
zz2DPoint lFirstPoint = new zz2DPoint(points[0]);
mPoints.Add(lFirstPoint);
zz2DPoint lPrePoint = addPoint(points[1],lFirstPoint);
for(int i=2;i<points.Length;++i)
{
zz2DPoint lNewPoint = addPoint(points[i], lPrePoint);
//若新的点在之前的线右边,则之前的角为凸角;
//zz2DPoint.LeftOrRight(
//lPrePoint.previousPoint.position,
//lPrePoint.position,
//lNewPoint.position) < 0;//lPrePoint's next point is lNewPoint
lPrePoint = lNewPoint;
}
zz2DPoint lLastPoint = lPrePoint;
zz2DLine lLastLine = new zz2DLine(lPrePoint, lFirstPoint);
mLines.Add(lLastLine);
//lLastPoint.convexAngle = zz2DPoint.LeftOrRight(
// lLastPoint.previousPoint.position,
// lLastPoint.position,
// lLastPoint.nextPoint.position) < 0;
//lFirstPoint.convexAngle = zz2DPoint.LeftOrRight(
// lFirstPoint.previousPoint.position,
// lFirstPoint.position,
// lFirstPoint.nextPoint.position) < 0;
//sortPoint(mPoints);
}
void linkPoint(zz2DPoint from, zz2DPoint to)
{
zz2DLine lLine = new zz2DLine(from, to);
}
internal void setPreviousLine(zz2DLine value)
{
mPreviousLine = value;
if (mNextLine != null)
convexAngle = isConvexPoint(previousPoint.position,position,nextPoint.position);
}
internal void addDiagonal(zz2DLine pDiagonal)
{
mDiagonals.Add(pDiagonal);
}
/// <summary>
/// 得到点的左右边,分割靠Y轴
/// </summary>
/// <param name="side1"></param>
/// <param name="side2"></param>
/// <returns>小于0 则边都在点左侧,大于0 则都在点右侧,等于0，则两边分部 或者有个在垂直方向上</returns>
public int getLeftRightSideInX( out zz2DLine side1, out zz2DLine side2)
{
side1 = previousLine;
side2 = nextLine;
float x = position.x;
if (previousPoint.position.x < x)
{
if (nextPoint.position.x < x)
return -1;
else
{
//side1 = PreviousLine;
//side2 = nextLine;
return 0;
}
}
else
{
if (nextPoint.position.x > x)
return 1;
else
{
side2 = previousLine;
side1 = nextLine;
return 0;
}
}
}
private zz2DPoint addPoint(zzPainterPoint pointPos, zz2DPoint lPrePoint)
{
zz2DPoint lPoint = new zz2DPoint(pointPos);
mPoints.Add(lPoint);
zz2DLine lLine = new zz2DLine(lPrePoint, lPoint);
mLines.Add(lLine);
lPrePoint = lPoint;
return lPoint;
}
