The beauty of Fragment

The beauty of Fragment

Only when I see some websites engaged in the Fragment Art can I know that Z = z * z + C is so wonderful.
Then write it in opencv and check it out. The results are good. Haha.
In this small example, only the value of C can be modified. If you are interested, you can change the code to see if you can make some wonderful images.

Code tip: to obtain high-quality images, you can add image_w, but the performance is very low.

 

Image
 

Reference
Http://blog.csdn.net/spanzhang/
Http://www.fractal.net.cn/

Code

 

// Test. cpp: defines the entry point of the console application.
//

# Include "stdafx. H"
# Include "cv. H"
# Include "highgui. H"

Const int maid = 100;
Const double A = 0.0;
Const Double B = 0.0;
Const long Nmax = 255; // the critical value of Z attenuation (tends to be zero)
Const double rmax = 20; // The Z value increases (tends to be infinite) without boundaries

Iplimage * image = 0;
Int c_r_value = 60;
Int c_ I _value = 40;

// Return the number of iterations
Int getnum (int I, Int J)
{
Double c_realpart = (double) (c_r_value-50)/100*2*2; //-2 to + 2 // Julia set constant C
Double c_imagpart = (double) (c_ I _value-50)/100*2*2; //-2 to + 2 // Julia set constant C
Double realpart = (double) I/image_w +;
Double imagpart = (double) J/image_w + B;
Int n = 0;
While (n <Nmax)
{
// Z = z * z + C;
Double ZM = realpart * realpart + imagpart * imagpart;
If (ZM> rmax) break;
Double temp_realpart = realpart * realpart-imagpart * imagpart + c_realpart;
Double temp_imagpart = 2 * imagpart * realpart + c_imagpart;
Realpart = temp_realpart;
Imagpart = temp_imagpart;
N ++;
}
Return N;
}
Void onchangeimg (int pos)
{
Cvzero (image );
For (INT I = 0; I <image_w; I ++)
For (Int J = 0; j <image_w; j ++)
{
Int n1 = getnum (I, j );
Int n2 = getnum (J, I );
Int N3 = getnum (J, I/2 );
// Printf ("% d,", N );

Cvscalar SC1;
If (N1> Nmax-2) n1 = 0;
If (N2> Nmax-2) N2 = 0;
If (N3> Nmax-2) N3 = 0;

Sc1.val [0] = (INT) ABS (255 * (float) N1/Nmax );
Sc1.val [1] = (INT) ABS (255 * (float) N2/Nmax );
Sc1.val [2] = (INT) ABS (255 * (float) N3/Nmax );
Cvset2d (image, I, j, SC1 );

}

Double nvalue = cvnorm (image, 0, cv_c );

For (INT I = 0; I <image_w; I ++)
For (Int J = 0; j <image_w; j ++)
{
Cvscalar SC1;
Cvscalar SC2 = cvget2d (image, I, j );
Sc1.val [0] = (INT) ABS (255 * sc2.val [0]/nvalue );
Sc1.val [1] = (INT) ABS (255 * sc2.val [1]/nvalue );;
Sc1.val [2] = (INT) ABS (255 * sc2.val [2]/nvalue );;
Cvset2d (image, I, j, SC1 );
}

}
Int main (INT argc, char ** argv)
{

Cvnamedwindow ("win", 0 );
Cvcreatetrackbar ("C real", "win", & c_r_value, 100, onchangeimg );
Cvcreatetrackbar ("C imag", "win", & c_ I _value, 100, onchangeimg );

Image = cvcreateimage (cvsize (image_w, image_w), 8, 3 );
Onchangeimg (0 );

For (;;)
{

Cvshowimage ("win", image );
If (cvwaitkey (40) = 27) break;
}
Return 0;

}

 

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