C # Implementation of 3D effect complete instance _c# tutorial

This article illustrates how C # achieves the 3D effect. Share to everyone for your reference, specific as follows:

A new type of file

private static double[] Addvector (double[] A, double[] b) {return new double[] {a[0] + b[0], a[1] + b[1], a[2] + b[
2]}; private static double[] scalarproduct (double[] vector, double scalar) {return new double[] {vector[0] * scalar, ve
CTOR[1] * scalar, vector[2] * scalar};  } private static Double Dotproduct (double[] A, double[] b) {return a[0] * b[0] + a[1] * b[1] + a[2] * b[2]; Static double norm (double[] vector) {return math.sqrt (dotproduct (vector, vector));} private static double[] Normali Ze (double[] vector) {return scalarproduct (vector, 1.0/norm (vector));} private static double[] Crossproduct (double[ ] A, double[] b {return new double[] {(a[1] * b[2]-a[2] * b[1]), (a[2) * B[0]-a[
0] * b[2]), (a[0] * b[1]-a[1] * b[0])};
          private static double[] vectorproductindexed (double[] v, double[] m, int i) {return new double[] { V[i + 0] * M[0] + v[i + 1] * M[4] + V[i + 2] * M[8] + v[i + 3] * m[12], v[i + 0] * M[1] + v[i + 1] * M[5] + v[i + 2] * M[9] + v[i + 3] * m[13),  V[i + 0] * M[2] + v[i + 1] * M[6] + v[i + 2] * m[10]+ V[i + 3] * m[14], v[i + 0] * M[3] + v[i + 1] * M[7]
+ V[i + 2] * m[11]+ V[i + 3] * m[15]}; private static double[] Vectorproduct (double[] v, double[] m) {return vectorproductindexed (V, m, 0);} private Stat
    IC double[] matrixproduct (double[] A, double[] b) {double[] O1 = Vectorproductindexed (A, b, 0);
    double[] O2 = Vectorproductindexed (A, B, 4);
    double[] O3 = Vectorproductindexed (A, B, 8);
    double[] O4 = Vectorproductindexed (A, B, 12);  return new double[] {o1[0], o1[1], o1[2], o1[3], o2[0], o2[1], o2[2], o2[3], o3[0],
O3[1], o3[2], o3[3], o4[0], o4[1], o4[2], o4[3]}; private static double[] Cameratransform (double[] C, double[] A) {double[] W = normalize (Addvector (C, Scalarproduct (
    A,-1)); Double[] y = new double[] {0, 1, 0};
    double[] U = Normalize (Crossproduct (y, W));
    double[] v = crossproduct (w, u);
    double[] t = scalarproduct (C,-1); 
          return new double[] {u[0], v[0], w[0], 0, u[1], v[1], w[1], 0, u[2], v[2], w[2], 0,
Dotproduct (U, t), dotproduct (V, t), Dotproduct (W, t), 1};
    private static double[] Viewingtransform (double FoV, double n, double f) {FoV *= (math.pi/180);
    Double cot = 1.0/math.tan (FOV/2);
return new double[] {cot, 0, 0, 0, 0, cot, 0, 0, 0, 0, (f + N)/(F-n),-1, 0, 0, 2 * f * N/(F-n), 0};
    public static Image Generate (string captchatext) {int fontsize = 24;
    Font font = new Font ("Arial", fontsize);
    SizeF SizeF; using (Graphics g = graphics.fromimage (new Bitmap (1, 1)) {SizeF = g.measurestring (captchatext, font, 0, String
    Format.genericdefault);
    int image2d_x = (int) sizef.width;
int image2d_y = (int) (FontSize * 1.3);    Bitmap image2d = new Bitmap (image2d_x, image2d_y);
    Color black = Color.Black;
    Color white = Color.White;
      using (Graphics g = graphics.fromimage (image2d)) {g.clear (black);
    g.DrawString (Captchatext, Font, brushes.white, 0, 0);
    } Random rnd = new Random (); double[] T = Cameratransform (new double[] {rnd. Next ( -90, -200), Rnd.
    Next (+)}, new double[] {0, 0, 0});
    t = matrixproduct (T, Viewingtransform (60, 300, 3000));
    double[][] coord = new double[image2d_x * image2d_y][];
    int count = 0; for (int y = 0; y < image2d_y; y + 2) {for (int x = 0; x < image2d_x + +) {int XC = x-
        IMAGE2D_X/2;
        int ZC = Y-IMAGE2D_Y/2; Double YC =-(double) (image2d. GetPixel (x, y).
        ToArgb () & 0xff)/256 * 4;
        double[] xyz = new double[] {XC, YC, ZC, 1};
        XYZ = Vectorproduct (xyz, T);
        Coord[count] = xyz;
      count++;
    an int image3d_x = 256; Int image3d_y = image3d_x * 9/16;
    Bitmap Image3d = new Bitmap (image3d_x, image3d_y);
    Color fgcolor = Color.White;
    Color bgcolor = Color.Black;
      using (Graphics g = graphics.fromimage (Image3d)) {g.clear (bgcolor);
      Count = 0;
      Double scale = 1.75-(double) image2d_x/400;  for (int y = 0; y < image2d_y; y + 2) {for (int x = 0; x < image2d_x + +) {if (x
            > 0) {double x0 = coord[count-1][0] * scale + IMAGE3D_X/2;
            Double y0 = coord[count-1][1] * scale + IMAGE3D_Y/2;
            Double x1 = coord[count][0] * scale + IMAGE3D_X/2;
            Double y1 = coord[count][1] * scale + IMAGE3D_Y/2;
          G.drawline (New Pen (Fgcolor), (float) x0, (float) y0, (float) x1, (float) y1);
        } count++;
}} return Image3d;

 }

Note Referencing namespaces:

Using System.Drawing;

Second, the page calls

Response.ContentType = "Image/pjpeg";
Captcha.generate ("I am 3D content"). Save (Response.outputstream, System.Drawing.Imaging.ImageFormat.Jpeg);

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