/// <summary>
/// Given triangle notation returns vertex coordinates
/// </summary>
/// <param name="triangleName">Row-column notation</param>
/// <returns>List of 2 points, representing vertex coordinates</returns>
public static List <Point> GetCoordinatesFromName(string triangleName)
{
var parsedTriangleName = NameNumberConverter.ParseTriangleName(triangleName);
var triangleNameLetter = parsedTriangleName.Item1;
var triangleNameNumber = parsedTriangleName.Item2;
//2 triangles per column; it's integer division, so even if the number is odd, it will
//return the whole number result rounded up to smaller number
var columnNumber = triangleNameNumber / 2;
//10 pixel/points per column
int rightX = columnNumber * PixelsPerRowOrColumn;
var letterOrderNumber = NameNumberConverter.ConvertLetterToNumber(triangleNameLetter);
//The grid is "upside down" as related to Y axis - the lowest order letter has the highest
//point is the closest to 0, thus we do this
var rowNumber = TotalNumberOfRows - letterOrderNumber;
//this reflects the location of triangles inside the cell - the even numbered ones
//have the higher Y point than odd ones
bool isOddTriangle = triangleNameNumber % 2 > 0;
int rightY = isOddTriangle ? rowNumber * PixelsPerRowOrColumn : (rowNumber + 1) * PixelsPerRowOrColumn;
Point rightAngleCoordinates = new Point(rightX, rightY);
Point point2 = isOddTriangle ?
new Point(rightAngleCoordinates.X + PixelsPerRowOrColumn, rightAngleCoordinates.Y) :
new Point(rightAngleCoordinates.X - PixelsPerRowOrColumn, rightAngleCoordinates.Y);
Point point3 = isOddTriangle ?
new Point(rightAngleCoordinates.X, rightAngleCoordinates.Y + PixelsPerRowOrColumn) :
new Point(rightAngleCoordinates.X, rightAngleCoordinates.Y - PixelsPerRowOrColumn);
return(new List <Point>()
{
rightAngleCoordinates, point2, point3
});
}
/// <summary>
/// Given vertex coordinates returns row-column letter-number notation
/// </summary>
/// <param name="point1">Triangle point 1</param>
/// <param name="point2">Triangle point 2 </param>
/// <param name="point3">Triangle point 3</param>
/// <returns></returns>
public static string GetNameFromCoordinates(Point point1, Point point2, Point point3)
{
Point rightAngleCoordinates = new Point(ReturnDuplicate(point1.X, point2.X, point3.X),
ReturnDuplicate(point1.Y, point2.Y, point3.Y));
//reversing the original calculations
bool isOddTriangleNumber = IsOdd(rightAngleCoordinates.Y, new List <int> {
point1.Y, point2.Y, point3.Y
});
//2 triangles per column
var adjustedColumnNumber = PixelsPerRowOrColumn / 2;
//have to add one to the odd number triangle as we rounded it up with the interger division above
int triangleNameNumber = isOddTriangleNumber ? rightAngleCoordinates.X / adjustedColumnNumber + 1
: rightAngleCoordinates.X / adjustedColumnNumber;
int triangleNameLetterOrder = isOddTriangleNumber ? (TotalNumberOfRows - rightAngleCoordinates.Y / PixelsPerRowOrColumn) :
(TotalNumberOfRows + 1 - rightAngleCoordinates.Y / PixelsPerRowOrColumn);
char triangleNameLetter = NameNumberConverter.ConvertNumberToLetter(triangleNameLetterOrder);
return(NameNumberConverter.ConvertToTriangleName(triangleNameLetter, triangleNameNumber));
}
