/// <summary>
/// 坐标转换成网格坐标
/// </summary>
/// <param name="position"></param>
/// <param name="grid"></param>
/// <returns></returns>
public static HexagonCoordinates FromPosition(Vector3 position, HexagonGrid grid)
{
float x = position.x / (grid.CellInnerRadius * 2f);
float y = -x;
float offset = position.z / (grid.CellOuterRadius * 3f);
x -= offset;
y -= offset;
int iX = Mathf.RoundToInt(x);
int iY = Mathf.RoundToInt(y);
int iZ = Mathf.RoundToInt(-x - y);
if (iX + iY + iZ != 0)
{
Debug.LogWarning("rounding error!");
float dX = Mathf.Abs(x - iX);
float dY = Mathf.Abs(y - iY);
float dZ = Mathf.Abs(-x - y - iZ);
if (dX > dY && dX > dZ)
{
iX = -iY - iZ;
}
else if (dZ > dY)
{
iZ = -iX - iY;
}
}
return(new HexagonCoordinates(iX, iZ));
}
public void Initialize(HexagonGrid grid)
{
this.grid = grid;
// 初始化六个定点
this.corners [0] = new Vector3(0f, 0f, grid.CellOuterRadius) + this.transform.localPosition;
this.corners [1] = new Vector3(grid.CellInnerRadius, 0f, 0.5f * grid.CellOuterRadius) + this.transform.localPosition;
this.corners [2] = new Vector3(grid.CellInnerRadius, 0f, -0.5f * grid.CellOuterRadius) + this.transform.localPosition;
this.corners [3] = new Vector3(0f, 0f, -grid.CellOuterRadius) + this.transform.localPosition;
this.corners [4] = new Vector3(-grid.CellInnerRadius, 0f, -0.5f * grid.CellOuterRadius) + this.transform.localPosition;
this.corners [5] = new Vector3(-grid.CellInnerRadius, 0f, 0.5f * grid.CellOuterRadius) + this.transform.localPosition;
this.corners [6] = new Vector3(0f, 0f, grid.CellOuterRadius) + this.transform.localPosition;
}