public Hex FindHexMouseClick(int x, int y)
{
Hex target = null;
if (PointInBoardRectangle(x, y))
{
for (int i = 0; i < hexes.GetLength(0); i++)
{
for (int j = 0; j < hexes.GetLength(1); j++)
{
if (CalcUtil.InsidePolygon(hexes[i, j].Points, 6, new System.Drawing.PointF(x, y)))
{
target = hexes[i, j];
break;
}
}
if (target != null)
{
break;
}
}
}
return(target);
}
/// <summary>
/// Calculates the vertices of the hex based on orientation. Assumes that points[0] contains a value.
/// </summary>
private void CalculateVertices()
{
//
// h = short length (outside)
// r = long length (outside)
// side = length of a side of the hexagon, all 6 are equal length
//
// h = sin (30 degrees) x side
// r = cos (30 degrees) x side
//
// h
// ---
// ---- |r
// / \ |
// / \ |
// \ /
// \____/
//
// Flat orientation (scale is off)
//
// /\
// / \
// / \
// | |
// | |
// | |
// \ /
// \ /
// \/
// Pointy orientation (scale is off)
h = CalcUtil.CalculateH(side);
r = CalcUtil.CalculateR(side);
int x_low, x_high, y_low, y_high = 0;
switch (orientation)
{
case HexOrientation.Flat:
// x,y coordinates are top left point
points = new System.Drawing.PointF[6];
points[0] = new PointF(x, y);
points[1] = new PointF(x + side, y);
points[2] = new PointF(x + side + h, y + r);
points[3] = new PointF(x + side, y + r + r);
points[4] = new PointF(x, y + r + r);
points[5] = new PointF(x - h, y + r);
x_low = (int)System.Math.Ceiling(x - h);
x_high = (int)System.Math.Floor(x + side + h);
y_low = (int)System.Math.Ceiling(y);
y_high = (int)System.Math.Floor(y + r + r);
break;
case HexOrientation.Pointy:
//x,y coordinates are top center point
points = new System.Drawing.PointF[6];
points[0] = new PointF(x, y);
points[1] = new PointF(x + r, y + h);
points[2] = new PointF(x + r, y + side + h);
points[3] = new PointF(x, y + side + h + h);
points[4] = new PointF(x - r, y + side + h);
points[5] = new PointF(x - r, y + h);
x_low = (int)System.Math.Ceiling(x - r);
x_high = (int)System.Math.Floor(x + r);
y_low = (int)System.Math.Ceiling(y);
y_high = (int)System.Math.Floor(y + side + h);
break;
default:
throw new Exception("No HexOrientation defined for Hex object.");
}
float cX = 0;
float cY = 0;
for (int i = 0; i < 6; i++)
{
cX += points[i].X;
cY += points[i].Y;
}
centroid = new PointF(cX / 6, cY / 6);
inPointSet = new List <System.Drawing.PointF> ();
for (int iX = x_low; iX <= x_high; iX++)
{
for (int iY = y_low; iY <= y_high; iY++)
{
PointF p = new PointF(iX, iY);
if (CalcUtil.InsidePolygon(points, 6, p))
{
inPointSet.Add(p);
}
}
}
}