這個分形實現有什麼問題？

Question

我的輸出沒有顯示分形

void mandelbrotFractal() 
{ 

    float MAX = 200; 

    float numIterations; 

    float ci; 

    float cr; 

    float zi; 

    float zr; 

    loadPixels(); 

    for(int j = 0; j < height; j++) 

    { 

    for(int i = 0; i < width; i++) 

    { 

     //H[-2.0,2.0] 
     //V[-1.5,1.5] 
     cr = - 2.0 + ((i*(2.0+2.0))/width) ; 
     ci = - 1.5 + ((j*(1.5+1.5))/height); 

     numIterations = 0; 
     zi =0; 
     zr =0; 

     while(numIterations < MAX) 
     { 
     float zrSquared = (zr*zr); 
     float ziSquared = (zi*zi); 

     zr = zrSquared - ziSquared + cr; 
     zi = 2.0*(zr*zi) + ci; 

     numIterations = numIterations + 1; 

     if((zr*zr) + (zi*zi) > 4.0) 
      break; 
     } 

     color r = int((numIterations % 32) * 7); 
     color g = int((numIterations % 16) * 14); 
     color b = int((numIterations % 128) * 2); 

     if(numIterations == MAX) 
     pixels[j*width + i] = color(0); 
     else 
     pixels[j*width + i] = color((numIterations % 32) * 7,(numIterations % 16) * 14, (numIterations % 128) * 2); 
    } 
    } 

    updatePixels(); 

    } 

Answer 1

相同的結果曼德爾布羅關鍵線是

zr = zrSquared - ziSquared + cr; 
zi = 2.0*(zr*zi) + ci; 

第二分配使用已新計算zr，因此不正確的值。你可能只是交換兩條線：

zi = 2.0*(zr*zi) + ci; 
zr = zrSquared - ziSquared + cr;