/// <summary>
/// 点がポリゴンの範囲にあるかどうか判断
/// </summary>
/// <param name="pt"></param>
/// <param name="frame"></param>
/// <returns></returns>
public static bool IsPointInFrame_Polygon(PointD pt, FrameD frame)
{
//////////////////////
// 座標系
// ↑Y
// ｜
// ｜
// ｜
// (0,0)－－－－－→X
///////////////////
pt.X = pt.X - frame.X;
pt.Y = pt.Y - frame.Y;
pt.Rotate_Clockwise(frame.Angle);
int i, j;
bool bRet = false;
int nvert = frame.PolygonArray.Length;
double testx = pt.X;
double testy = pt.Y;
PointD[] arrayP = frame.PolygonArray;
for (i = 0, j = nvert - 1; i < nvert; j = i++)
{
if (((arrayP[i].Y > testy) != (arrayP[j].Y > testy)) &&
(testx < (arrayP[j].X - arrayP[i].X) * (testy - arrayP[i].Y) / (arrayP[j].Y - arrayP[i].Y) + arrayP[i].X))
{
bRet = !bRet;
}
}
return(bRet);
}
/// <summary>
/// 点が円形の範囲にあるかどうか判断
/// </summary>
/// <param name="pt"></param>
/// <param name="frame"></param>
/// <returns></returns>
public static bool IsPointInFrame_Ellipse(PointD pt, FrameD frame)
{
//////////////////////
// 座標系
// ↑Y
// ｜
// ｜
// ｜
// (0,0)－－－－－→X
///////////////////
pt.X = pt.X - frame.X;
pt.Y = pt.Y - frame.Y;
pt.Rotate_Clockwise(frame.Angle);
double radius;
if (!ToolMath.EqualsDouble(frame.Width, frame.Height))
{
double dScale;
if (frame.Width > frame.Height)
{
dScale = frame.Width / frame.Height;
pt.Y = dScale * pt.Y;
radius = frame.Width / 2;
}
else
{
dScale = frame.Height / frame.Width;
pt.X = dScale * pt.X;
radius = frame.Height / 2;
}
}
else
{
radius = frame.Width / 2;
}
if (Math.Sqrt(pt.X * pt.X + pt.Y * pt.Y) < radius)
{
return(true);
}
return(false);
}
/// <summary>
/// 点が矩形枠の範囲にあるかどうか判断
/// </summary>
/// <param name="pt"></param>
/// <param name="frame"></param>
/// <returns></returns>
public static bool IsPointInFrame_Rectangle(PointD pt, FrameD frame)
{
//////////////////////
// 座標系
// ↑Y
// ｜
// ｜
// ｜
// (0,0)－－－－－→X
///////////////////
pt.X = pt.X - frame.X;
pt.Y = pt.Y - frame.Y;
pt.Rotate_Clockwise(frame.Angle);
if (pt.X > -frame.Width / 2 && pt.X < frame.Width / 2 && pt.Y > -frame.Height / 2 && pt.Y < frame.Height / 2)
{
return(true);
}
return(false);
}
