Question

我希望使用这样的自定义RGB比例从0到100的给定值返回RGB值：

RANGE   Ra      Ga      Ba      Rb      Gb      Bb
0       255     255     255     255     255     255
0-1     165     242     243     125     200     255
1-25    0       255     0       63      82      0
25-50   63      82      0       255     143     31
50-75   255     143     31      255     0       0
75-100  255     0       0       255     0       0

例如，

如果我发送双倍0.0我会得到255,255,255返回
如果我发送双0.5，我会得到145 221 249返回
如果我发送双1.0，我会得到0 255 0返回

我想可能需要六个不同的部分来容纳六个范围？

长形式的概念示例：

private string RGB(double value) //pass value 0.0 - 100.0
    {
        if(value == 0)
        {
            return ("255,255,255");
        }
        if(value >= 0 && value <= 1)
        {
            //calculate rgb value between  164,242,243  and   125,200,255 
            return ("something between 164,242,243 and 125,200,255");
        }
        //more if's here
        return ("nothing found");
    }

Answer 1

请尝试以下操作：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Drawing;

namespace ConsoleApp2

{

    class Program
    {

        static void Main()
        {
            Color color =  RGBScale.AverageColor(.5F);

        }
    }
    public class RGBScale
    {
        //each row is defined as follows
        //low range, high range,   Ra,      Ga,      Ba,      Rb,      Gb,      Bb,
        public static List<List<int>> table = new List<List<int>>() {
            new List<int>() {0, 1, 165, 242, 243, 125, 200, 255},
            new List<int>() {1, 25, 0, 255, 0, 63, 82, 0},
            new List<int>() {25, 50, 63, 82, 0, 255, 143, 31},
            new List<int>() {50, 75, 255, 143, 31, 255, 0, 0},
            new List<int>() {75, 100, 255, 0, 0, 255, 0,0}
        };

        public static Color AverageColor(float index)
        {
            int red = 255;
            int blue = 255;
            int green = 255;

            foreach (List<int> row in table)
            {
                if (index <= row[1])
                {
                    double start = row[0];
                    double end = row[1];
                    double scale = (index - start) / (end - start); 
                    red = (int)Math.Round(scale * (row[5] - row[2]) + row[2]);
                    green = (int)Math.Round(scale * (row[6] - row[3]) + row[3]);
                    blue = (int)Math.Round(scale * (row[7] - row[4]) + row[4]);
                    break;
                }

            }
            return Color.FromArgb(red, green, blue);
        }
    }
}

以下是在Windows窗体上运行的代码示例

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Buttons
{
    public partial class Form1 : Form
    {
        const int ROWS = 5;
        const int COLS = 20;
        public Form1()
        {
            InitializeComponent();
            this.Load += new System.EventHandler(this.Form1_Load);
        }
        public void Form1_Load(object sender, EventArgs e)
        {
            new MyButton(ROWS, COLS, this);
        }


    }
    public class MyButton : PictureBox
    {
        const int WIDTH = 50;
        const int HEIGHT = 50;
        const int SPACE = 5;
        const int BORDER = 20;

        public static List<List<MyButton>> buttons { get; set; }
        public static List<MyButton> buttonList { get; set; }
        public Form1 form1;
        public int row { get; set; }
        public int col { get; set; }
        public MyButton()
        {
        }
        public MyButton(int rows, int cols, Form1 form1)
        {
            int count = 1;
            buttons = new List<List<MyButton>>();
            buttonList = new List<MyButton>();

            this.form1 = form1;
            for(int row = 0; row < rows; row++)
            {
                List<MyButton> newRow = new List<MyButton>();
                buttons.Add(newRow);
                for (int col = 0; col < cols; col++)
                {
                    MyButton newButton = new MyButton();
                    newButton.Height = HEIGHT;
                    newButton.Width = WIDTH;
                    newButton.Top = row * (HEIGHT + SPACE) + BORDER;
                    newButton.Left = col * (WIDTH + SPACE) + BORDER;
                    newButton.row = row;
                    newButton.col = col;
                    newButton.BackColor = RGBScale.AverageColor(count++);
                    newRow.Add(newButton);
                    buttonList.Add(newButton);
                    newButton.Click += new System.EventHandler(Button_Click);
                    form1.Controls.Add(newButton);
                }
            }
        }
        public void Button_Click(object sender, EventArgs e)
        {
            MyButton button = sender as MyButton;
            MessageBox.Show(string.Format("Pressed Button Row {0} Column {1}", button.row, button.col));

        }

    }
    public class RGBScale
    {
        //each row is defined as follows
        //low range, high range,   Ra,      Ga,      Ba,      Rb,      Gb,      Bb,
        public static List<List<int>> table = new List<List<int>>() {
            new List<int>() {0, 1, 165, 242, 243, 125, 200, 255},
            new List<int>() {1, 25, 0, 255, 0, 63, 82, 0},
            new List<int>() {25, 50, 63, 82, 0, 255, 143, 31},
            new List<int>() {50, 75, 255, 143, 31, 255, 0, 0},
            new List<int>() {75, 100, 255, 0, 0, 255, 0,0}
        };

        public static Color AverageColor(float index)
        {
            int red = 255;
            int blue = 255;
            int green = 255;

            foreach (List<int> row in table)
            {
                if (index <= row[1])
                {
                    double start = row[0];
                    double end = row[1];
                    double scale = (index - start) / (end - start);
                    red = (int)Math.Round(scale * (row[5] - row[2]) + row[2]);
                    green = (int)Math.Round(scale * (row[6] - row[3]) + row[3]);
                    blue = (int)Math.Round(scale * (row[7] - row[4]) + row[4]);
                    break;
                }

            }
            return Color.FromArgb(red, green, blue);
        }
    }
}

红色太暗了。建议将表的最后一行更改为以下：75,100,255,0,0,200,0,0

使用自定义RGB比例从给定值0-100返回RGB值

1 个答案: