APPENDIX A.B
Mandelbar Variation Snowflakes
Mandelbar Variation Snowflakes use Mandelbrot variations, actually Mandelbar variations.
Mandelbrot is (x+iy)² and Mandelbar is (x-iy)² which produces a three-pronged figure.
The expression (x-iy)⁵ produces a six-pronged figure with the figure not quite radially symmetric, but with a snowflake shape.
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for (i = 0; i ≤ 800; i++) { for (j = 0; j ≤ 800; j++) { x = 0.0; y = 0.0; xs = -4.0+(i / 100.0); ys = -4.0+(j / 100.0); k = 0; do { k = k+1; xnew = x⁵-10.0*x³*y²+5.0*x*y⁴+xs; ynew = -y⁵+10.0*x²*y³-5.0*x⁴*y+ys; x = xnew; y = ynew; } while ((k ≤ 255) && (x*x+y*y ≤ 16.0)); PlotPixel(i, j, color); } }Six-Pronged Mandelbar Expanded Center with Pseudocode
The center of the Six-Pronged Mandelbar is expanded to reveal the prongs.
for (i = 0; i ≤ 1200; i++) { for (j = 0; j ≤ 1200; j++) { x = 0.0; y = 0.0; xs = -1.5+(i / 400.0); ys = -1.5+(j / 400.0); k = 0; do { k = k+1; xnew = x⁵-10.0*x³*y²+5.0*x*y⁴+xs; ynew = -y⁵+10.0*x²*y³-5.0*x⁴*y+ys; x = xnew; y = ynew; } while ((k ≤ 255) && (x*x+y*y ≤ 16.0)); PlotPixel(i, j, color); } }Six-Pronged Mandelbar Snowflake with Pseudocode
To obtain this figure, pixels are plotted at iteration count increment.
for (i = 0; i ≤ 1200; i++) { oldk = 0; for (j = 0; j ≤ 1200; j++) { x = 0.0; y = 0.0; xs = -1.5+(i / 400.0); ys = -1.5+(j / 400.0); k = 0; do { k = k+1; xnew = x⁵-10.0*x³*y²+5.0*x*y⁴+xs; ynew = -y⁵+10.0*x²*y³-5.0*x⁴*y+ys; x = xnew; y = ynew; } while ((k ≤ 255) && (x*x+y*y ≤ 16.0)); if ((oldk != k) && (k > 3) && (oldk > 3)) PlotPixel(i, j, color); oldk = k; } }
Snowflake | Build: (f(x,y), g(x,y)) | Escape: h(x,y)>value |
---|---|---|
Example | (x⁵-10.0*x³*y²+5.0*x*y⁴, -y⁵+10.0*x²*y³-5.0*x⁴*y) | x²+y²>16.0 |
Snowflake #25 | (x⁵-10.0*x³*y²+5.0*x*y⁴, -y⁵+10.0*x²*y³-5.0*x⁴*y) | x²+y²+|x|+|y|>16.0 |
Snowflake #26 | (x⁵*k-10.0*x³*y²*k+5.0*x*y⁴*k-0.5*x, -y⁵*k+10.0*x²*y³*k-5.0*x⁴*y*k-0.5*y) | x²+y²>16.0 |
Snowflake #27 | (x⁵-10.0*x³*y²+5.0*x*y⁴, -y⁵+10.0*x²*y³-5.0*x⁴*y) | x²+y²+|x|>16.0/k |
Snowflake #28 | (x⁵-10.0*x³*y²+5.0*x*y⁴, -y⁵+10.0*x²*y³-5.0*x⁴*y) | x*x+|y|+|x|>16.0/k |
Snowflake #29 | (x⁵-10.0*x³*y²+5.0*x*y⁴-0.5*x, -y⁵+10.0*x²*y³-5.0*x⁴*y-0.5*y) | |x|+|y|>16.0/k |
Snowflake #30 | (x⁵-10.0*x³*y²+5.0*x*y⁴+x/k, -y⁵+10.0*x²*y³-5.0*x⁴*y+y/k) | y*y+0.25*|x| >16.0/k |
Snowflake #31 | (x⁵-10.0*x³*y²+5.0*x*y⁴+0.25*x, -y⁵+10.0*x²*y³-5.0*x⁴*y+0.25*y) | y*y+0.25*|x| >16.0/k |
Snowflake #32 | (x⁵-10.0*x³*y²+5.0*x*y⁴+x/3.0, -y⁵+10.0*x²*y³-5.0*x⁴*y+y/3.0) | y*y+0.25*|x| >16.0/k |
Snowflake #33 | (x⁵-10.0*x³*y²+5.0*x*y⁴-x*0.25, -y⁵+10.0*x²*y³-5.0*x⁴*y-y*0.25) | y*y+0.25*|x| >16.0/k |
Snowflake #34 | (x⁵-10.0*x³*y²+5.0*x*y⁴-x/1.2, -y⁵+10.0*x²*y³-5.0*x⁴*y-y/1.2) | x²+y²>16.0/k |
Snowflake #35 | (x⁵-10.0*x³*y²+5.0*x*y⁴-x/10.0, -y⁵+10.0*x²*y³-5.0*x⁴*y-y/10.0) | 0.125*|y|+0.25*|x|+y*y>16.0/k |
Snowflake #36 | (x⁵-10.0*x³*y²+5.0*x*y⁴+x/20.0, -y⁵+10.0*x²*y³-5.0*x⁴*y+y/20.0) | x²+y²+|x|+|y|>16.0/k |
Snowflake #37 | (x⁵-10.0*x³*y²+5.0*x*y⁴-x/20.0, -y⁵+10.0*x²*y³-5.0*x⁴*y+y/4.0) | x²+y²-0.25*|y|>16.0/k |
Snowflake #38 | (x⁵-10.0*x³*y²+5.0*x*y⁴+x/k, -y⁵+10.0*x²*y³-5.0*x⁴*y)+y/k) | x*x+y*y-0.2*|y|>16.0/k |
Snowflake #39 | (x⁵-10.0*x³*y²+5.0*x*y⁴+x/k, -y⁵+10.0*x²*y³-5.0*x⁴*y)+y/k) | x*x-0.8*|y|>16.0/k |
Snowflake #40 | (x⁵-10.0*x³*y²+5.0*x*y⁴+x/k, -y⁵+10.0*x²*y³-5.0*x⁴*y)+y/k) | 0.5*|x|>16.0/k |
Snowflake #41 | (x⁵-10.0*x³*y²+5.0*x*y⁴+x/2.0, -y⁵+10.0*x²*y³-5.0*x⁴*y+y/2.0) | |x|>16.0/k |
Snowflake #42 | (x⁵-10.0*x³*y²+5.0*x*y⁴+x*k/12.0, -y⁵+10.0*x²*y³-5.0*x⁴*y+y*k/12.0) | 0.75*|x|>16.0/k |
Snowflake #43 | (x⁵-10.0*x³*y²+5.0*x*y⁴-x*k/12.0, -y⁵+10.0*x²*y³-5.0*x⁴*y-y*k/12.0) | 0.5*|x|>16.0/k |
Snowflake #44 | (x⁵*k-10.0*x³*y²*k+5.0*x*y⁴*k-x/k, -y⁵*k+10.0*x²*y³*k-5.0*x⁴*y*k-y/k) | 2.0*|x|>16.0/k |
Snowflake #45 | (x⁵*k-10.0*x³*y²*k+5.0*x*y⁴*k-x/k³, -y⁵*k+10.0*x²*y³*k-5.0*x⁴*y*k-y/k³) | 0.5*x*x+|y*y*x|>16.0/k |
Snowflake #46 | (x⁵-10.0*x³*y²+5.0*x*y⁴-x/k, -y⁵+10.0*x²*y³-5.0*x⁴*y -y/k) | x²+0.5*y²>16.0/k |
Snowflake #47 | (x⁵-10.0*x³*y²+5.0*x*y⁴-x/k², -y⁵+10.0*x²*y³-5.0*x⁴*y-y/k²) | 0.4*x²+0.3*y²+|x|+|y|>16.0/k |
Snowflake #48 | (2.0*(x⁵/k-10.0*x³*y²/k+5.0*x*y⁴)/k, 2.0*(-y⁵/k+10.0*x²*y³/k-5.0*x⁴*y)/k) | x²+y²>16.0/k |
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