控制台图表绘图

Question

我需要一种方法来绘制Dictionary<int,int>一个控制台应用程序,如

Dictionary<int, int> chartList = new Dictionary<int, int>()
{
        {50,31}, // x = 50, y = 31
        {71,87},
        {25,66},
        {94,15},
        {33,94}
};
DrawChart(chartList);

应该导致类似的东西

我已经走到这一步了但是我坚持使用这个IsHit方法,它决定了当前坐标是否应该设置一个点.在这一点上有人可以帮助我吗？它总是返回true.

public static void DrawChart(Dictionary<int, int> dict)
{
    int consoleWidth = 78;
    int consoleHeight = 20;

    Console.WriteLine(dict.Max(x => x.Key).ToString());

    Func<int, int, bool> IsHit = (hx, hy) => dict.Any(dct => dct.Key / dict.Max(x => x.Key) == hx / dict.Max(x => x.Key) && dct.Value / dict.Max(x => x.Value) == hy / dict.Max(x => x.Value));

    for (int i = 0; i < consoleHeight; i++)
    {
        Console.Write(i == 0 ? '?' : '?');
        for (int j = 0; j < consoleWidth; j++)
        {
            int actualheight = i * 2;

            if (IsHit(j, actualheight) && IsHit(j, actualheight + 1))
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.BackgroundColor = ConsoleColor.Black;
                Console.Write('?');
            }
            else if (IsHit(j, actualheight))
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.BackgroundColor = ConsoleColor.Black;
                Console.Write('?');
            }
            else if (IsHit(j, actualheight + 1))
            {
                Console.ForegroundColor = ConsoleColor.Black;
                Console.BackgroundColor = ConsoleColor.Red;
                Console.Write('?');
            }
        }
        Console.ResetColor();
        Console.WriteLine();
    }
    Console.WriteLine('?' + new string('?', (consoleWidth / 2) - 1) + '?' + new string('?', (consoleWidth / 2) - 1) + '?');
    Console.Write((dict.Min(x => x.Key) + "/" + dict.Min(x => x.Value)).PadRight(consoleWidth / 3));
    Console.Write((dict.Max(x => x.Value) / 2).ToString().PadLeft(consoleWidth / 3 / 2).PadRight(consoleWidth / 3));
    Console.WriteLine(dict.Max(x => x.Value).ToString().PadLeft(consoleWidth / 3));
}

Answer 1

下面的代码应该给你一些想法.首先需要引进一个Point,因为有工作Dictionary,它是Key和Value性能,而不是像普通的名字X和Y是一个噩梦.此外,在字典中,您无法使用相同的X坐标存储多个点,这没有多大意义.

public struct Point {
    public Point(int x, int y) {
       this.X = x;
        this.Y = y;
    }

    public int X { get; }
    public int Y { get; }
}

然后有点修改DrawChart:

    public static void DrawChart(List<Point> dict)
    {
        int consoleWidth = 78;
        int consoleHeight = 20;
        int actualConsoleHeight = consoleHeight * 2;
        var minX = dict.Min(c => c.X);
        var minY = dict.Min(c => c.Y);            
        var maxX = dict.Max(c => c.X);
        var maxY = dict.Max(c => c.Y);

        Console.WriteLine(maxX);
        // normalize points to new coordinates
        var normalized = dict.
            Select(c => new Point(c.X - minX, c.Y - minY)).
            Select(c => new Point((int)Math.Round((float) (c.X) / (maxX - minX) * (consoleWidth - 1)), (int)Math.Round((float) (c.Y) / (maxY - minY) * (actualConsoleHeight - 1)))).ToArray();
        Func<int, int, bool> IsHit = (hx, hy) => {
            return normalized.Any(c => c.X == hx && c.Y == hy);
        };

        for (int y = actualConsoleHeight - 1; y > 0; y -= 2)
        {
            Console.Write(y == actualConsoleHeight - 1 ? '?' : '?');
            for (int x = 0; x < consoleWidth; x++)
            {
                bool hitTop = IsHit(x, y);
                bool hitBottom = IsHit(x, y - 1);                    
                if (hitBottom && hitTop)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.BackgroundColor = ConsoleColor.Black;
                    Console.Write('?');
                }
                else if (hitTop)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.BackgroundColor = ConsoleColor.Black;
                    Console.Write('?');
                }
                else if (hitBottom)
                {
                    Console.ForegroundColor = ConsoleColor.Black;
                    Console.BackgroundColor = ConsoleColor.Red;
                    Console.Write('?');
                }
                else
                {
                    Console.ForegroundColor = ConsoleColor.Black;
                    Console.BackgroundColor = ConsoleColor.Black;
                    Console.Write('?');
                }                    
            }                
            Console.ResetColor();
            Console.WriteLine();
        }
        Console.WriteLine('?' + new string('?', (consoleWidth / 2) - 1) + '?' + new string('?', (consoleWidth / 2) - 1) + '?');
        Console.Write((dict.Min(x => x.X) + "/" + dict.Min(x => x.Y)).PadRight(consoleWidth / 3));
        Console.Write((dict.Max(x => x.Y) / 2).ToString().PadLeft(consoleWidth / 3 / 2).PadRight(consoleWidth / 3));
        Console.WriteLine(dict.Max(x => x.Y).ToString().PadLeft(consoleWidth / 3));
    }

用法:

static void Main(string[] args) {
    var chartList = new List<Point> {
        new Point(50, 31), // x = 50, y = 31
        new Point(71, 87),
        new Point(71, 89),
        new Point(25, 66),
        new Point(94, 15),
        new Point(33, 94)
    };
    DrawChart(chartList);
    Console.ReadKey();
}

结果: