如何在图形中转换矩阵。PointF

发布于 2025-01-23 07:36:18 字数 802 浏览 0 评论 0原文

我需要在画布中绘制“ n”一词，但是坐标位于矩阵中，我需要乘以该值，我尝试用多边形绘制结果并保存在一系列点中。我该怎么做？因此，我需要使用该矩阵进行其他操作并将其绘制。

float[] wordN = {  0, 0 ,  0.5f, 0 , 0.5f, 6.42f ,  6, 0 ,  6, 8 ,  5.5f, 8 ,  5.5f, 1.58f,  0, 8  };

private void panelNOriginal_Paint(object sender, PaintEventArgs e){
            float[,] matriz = new float[2, 8];
            PointF[] prueba = new PointF[16];

            int conta = 0;
            for (int i = 0; i < 2; i++)
            {
                for (int j = 0; j < 8; j++)
                {
                    matriz[i, j] = wordN[conta] * 15;
                    conta++;

                    prueba[i] = new PointF(wordN[i], wordN[j]);
                }
                
            }

            e.Graphics.DrawPolygon(new Pen(Color.Black), prueba);
} ```

原文

I need to draw the word "N" in a canvas, but the coordinates are in a matrix and i need to multiply that values, i try to draw the results with polygon and save in a array of points.
how can i do that? so i need to do other operations with that matrix and graph it.

float[] wordN = {  0, 0 ,  0.5f, 0 , 0.5f, 6.42f ,  6, 0 ,  6, 8 ,  5.5f, 8 ,  5.5f, 1.58f,  0, 8  };

private void panelNOriginal_Paint(object sender, PaintEventArgs e){
            float[,] matriz = new float[2, 8];
            PointF[] prueba = new PointF[16];

            int conta = 0;
            for (int i = 0; i < 2; i++)
            {
                for (int j = 0; j < 8; j++)
                {
                    matriz[i, j] = wordN[conta] * 15;
                    conta++;

                    prueba[i] = new PointF(wordN[i], wordN[j]);
                }
                
            }

            e.Graphics.DrawPolygon(new Pen(Color.Black), prueba);
} ```

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不气馁 2025-01-30 07:36:18

我猜您想做这样的事情：

var points = new List<PointF>();
for(var i = 0; i < wordN.Length/2; i++){
    var x = wordN[i];
    var y = wordN[i*2];
    points.Add(new PointF(x * 15, y * 15));
}
e.Graphics.DrawPolygon(Pens.Black, points.ToArray());

假设原始数组包含X0，x1，.. y0，y1 ..的坐标。
您可以将其转换为单个循环的点列表，并在此时进行任何缩放。我不确定需要什么矩阵。

如果原始列表包含交织的坐标，则IE x0，y0，x1，y1 ...，而不是将循环更改为i＆lt; wordn.length-1; I+= 2和y-index to i+1。

I'm guessing you want to do something like this:

var points = new List<PointF>();
for(var i = 0; i < wordN.Length/2; i++){
    var x = wordN[i];
    var y = wordN[i*2];
    points.Add(new PointF(x * 15, y * 15));
}
e.Graphics.DrawPolygon(Pens.Black, points.ToArray());

Assuming the original array contain coordinates like x0, x1,.. y0, y1..
You can convert this to a list of points with a single loop and do any scaling at this point. I'm not sure what the matrix is needed for.

If the original list contains interleaved coordinates, i.e. x0, y0, x1, y1..., than change the loop to i < wordN.Length-1; i+=2 and the y-index to i+1.

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