Mandelbrot fractal - color version - slow but nice :-)
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main.cpp
00001 #include "TFT_4DGL.h" 00002 00003 TFT_4DGL lcd(p9,p10,p11); 00004 00005 int main() { 00006 00007 float xmin = -2.5; 00008 float ymin = -2.0; 00009 float wh = 4; 00010 00011 int maxiterations = 100; 00012 int width = 320; 00013 int height = 320; 00014 00015 float xmax = xmin+wh; 00016 00017 float ymax = ymin+wh; 00018 00019 float dx = (xmax - xmin) / (width); 00020 float dy = (ymax - ymin) / (height); 00021 00022 float y = ymin; 00023 00024 00025 for (int j = 0; j < (height); j++) { 00026 00027 float x = xmin; 00028 for (int i = 0; i < width; i++) { 00029 00030 float a = x; 00031 float b = y; 00032 int n = 0; 00033 while (n < maxiterations) { 00034 00035 float aa = a * a; 00036 float bb = b * b; 00037 float twoab = 2.0 * a * b; 00038 a = aa - bb + x; 00039 b = twoab + y; 00040 00041 if(aa + bb > 16.0) { 00042 break; 00043 } 00044 n++; 00045 } 00046 00047 if (n == maxiterations) { 00048 00049 } else { 00050 00051 lcd.pixel(120+80*y,210+80*x,n*n*n*n*n*n*n*n); 00052 00053 } 00054 x += dx; 00055 } 00056 y += dy; 00057 } 00058 00059 }
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Kamil Ondrousek