public TriangleCoordinates GetCoordinates(GridPosition position)
{
ValidateGridPosition(position);
TriangleCoordinates result = new TriangleCoordinates();
// In even columns, V1 is on the right.
if (position.Column % 2 == 0)
{
result.V1X = (position.Column / 2) * 10;
result.V1Y = (position.RowNumber - 1) * 10;
result.V2X = result.V1X - 10;
result.V2Y = result.V1Y;
result.V3X = result.V1X;
result.V3Y = result.V1Y + 10;
}
else // In odd columns, V1 is on the left
{
result.V1X = (position.Column == 1) ? 0 : ((position.Column - 1) / 2) * 10;
result.V1Y = 10 * position.RowNumber;
result.V2X = result.V1X;
result.V2Y = result.V1Y - 10;
result.V3X = result.V1X + 10;
result.V3Y = result.V1Y;
}
return(result);
}
public GridPosition GetGridPosition(TriangleCoordinates coordinates)
{
ValidateTriangleCoordinates(coordinates);
GridPosition position = new GridPosition();
// -- Figure out if it's an odd or even column
bool isOdd = false;
if (coordinates.V1X == coordinates.V2X &&
coordinates.V1Y > coordinates.V2Y)
{
isOdd = true;
}
// -- Calculate Row
int row = 0;
if (isOdd)
{
row = coordinates.V1Y / 10;
position.Column = ((coordinates.V1X / 10) * 2) + 1;
}
else
{
row = (coordinates.V1Y + 10) / 10;
position.Column = ((coordinates.V1X / 10) * 2);
}
position.Row = ((char)(row + 64)).ToString();
return(position);
}
private void ValidateTriangleCoordinates(TriangleCoordinates coordinates)
{
ValidateCoordinate(coordinates.V1X);
ValidateCoordinate(coordinates.V1Y);
ValidateCoordinate(coordinates.V2X);
ValidateCoordinate(coordinates.V2Y);
ValidateCoordinate(coordinates.V3X);
ValidateCoordinate(coordinates.V3Y);
}
