Letters by K3DSurf
Abdelhamid Belaid (abdelhamid3920@gmail.com)
Web page: http://www.flickr.com/photos/43056454@N04/sets/72157622368691449/
It's so simple I'm the man who likes mathematics.
Web page: http://www.flickr.com/photos/43056454@N04/sets/72157622368691449/
It's so simple I'm the man who likes mathematics.

K3DSurf

F(x,y,z)= 4*min( abs(y+0.8) , (-abs(x)*cos(pi/10)-y*sin(pi/10)+1) )^2+(2*z)^200+(y/3)^200-1
[x]: -2.6 , 2.6
[y]: -3 , 3
[z]: -0.5001 , 0.5001
[x]: -2.6 , 2.6
[y]: -3 , 3
[z]: -0.5001 , 0.5001
A

F(x,y,z)= 4*min( abs( ((abs(x)-1)^4+(y+1.25)^4)^(1/4)-1.25) , min( x , abs(((abs(x)-0.5)^4+(y-1.25)^4)^(1/4)-1.25) ))^2+(2*z)^100+(y/2.9)^200-1
[x]: -3 , 3
[y]: -3 , 3
[z]: -0.5001 , 0.5001
B

F(x,y,z)= max( ( 4*( (y^4+4*x^2)^(1/2)-2.5 )^2+(2*z)^100-1 ) ,-( (x-1)^2+(1.2*y)^100-1) )
[x]: -3 , 3
[y]: -3 , 3
[z]: -0.5001 , 0.5001
[x]: -3 , 3
[y]: -3 , 3
[z]: -0.5001 , 0.5001
C

F(x,y,z)= max( y , ( x^4+y^4)^0.25-6 )^2+z^100-1
[x]: -7 , 7
[y]: -8 , 1.01
[z]: -1 , 1
[x]: -7 , 7
[y]: -8 , 1.01
[z]: -1 , 1
D

F(x,y,z)= 4*min( abs(-(abs(abs(y)-1.25)-1.25)) , x+0.25 )^2+(2*z)^100+(y/2.9)^200+(x/2)^200-1
[x]: -1 , 2
[y]: -3 , 3
[z]: -0.501 , 0.501
[x]: -1 , 2
[y]: -3 , 3
[z]: -0.501 , 0.501
E

F(x,y,z)= 4*min( abs(-(abs(y-1.5)-1)) , x+0.25 )^2+(2*z)^100+(y/2.9)^200+(x/2)^200-1
[x]: -1 , 2
[y]: -3 , 3
[z]: -0.501 , 0.501
[x]: -1 , 2
[y]: -3 , 3
[z]: -0.501 , 0.501
F

F(x,y,z)=min( min( (2*(x-1))^100+(4*(y+0.8))^100+(2*z)^100-1 ,(4*(x-1.25))^100+(2*(y+1.05))^100+(2*z)^100-1 ) ,max( ( 4*( (y^4+4*x^2)^(1/2)-2.5 )^2+(2*z)^100-1 ) ,-( (x-1)^2+(1.2*y)^100-1) ) )
[x]: -2.5 , 3
[y]: -3.0001 , 3.0001
[z]: -0.50001 , 0.50001
[x]: -2.5 , 3
[y]: -3.0001 , 3.0001
[z]: -0.50001 , 0.50001
G

F(x,y,z)= 4*min( abs(y) , -abs(x)+2 )^2+(2*z)^100+(y/3)^200-1
[x]: -2.501 , 2.501
[y]: -3 , 3
[z]: -0.501 , 0.501
[x]: -2.501 , 2.501
[y]: -3 , 3
[z]: -0.501 , 0.501
H

F(x,y,z)= (2*x)^100+(y/3)^100+(2*z)^100-1
[x]: -0.5001 , 0.5001
[y]: -3.0001 , 3.0001
[z]: -0.5001 , 0.5001
[x]: -0.5001 , 0.5001
[y]: -3.0001 , 3.0001
[z]: -0.5001 , 0.5001
I

F(x,y,z)= min( max( y+1.5 , 4*(sqrt((x+1)^2+(y+1.5)^2)-1)^2+(2*z)^100-1 ) ,(2*x)^100+((y-1.5/2)/(4.5/2))^100+(2*z)^100-1 )
[x]: -2.5 , 0.50001
[y]: -3.0001 , 3.0001
[z]: -0.50001 , 0.50001
[x]: -2.5 , 0.50001
[y]: -3.0001 , 3.0001
[z]: -0.50001 , 0.50001
J

min( min( (2*x)^51+(y/3)^50 , 2*abs(y*cos(pi/3)-x*sin(pi/3)+1) ) ,2*abs(x*cos(pi/7)+y*sin(pi/7)-1)+((y+1.5)/1.5)^50 )^2+(y/3)^100+(2*z)^100-1
[x]: -0.51 , 3.5
[y]: -3.0001 , 3.0001
[z]: -0.50001 , 0.50001
[x]: -0.51 , 3.5
[y]: -3.0001 , 3.0001
[z]: -0.50001 , 0.50001
K

F(x,y,z)= 4*min( y+2.5 , x+0.25 )^2+(2*z)^100+(y/3)^200+(x/2)^200-1
[x]: -1 , 2
[y]: -3 , 3
[z]: -0.501 , 0.501
[x]: -1 , 2
[y]: -3 , 3
[z]: -0.501 , 0.501
L

F(x,y,z)= 4*min( -(-abs(x)*cos(pi/4)+y*sin(pi/4)) , -abs(x)+1.75 )^2+(2*z)^200+(y/3)^200-1
[x]: -2.3 , 2.3
[y]: -3.001 , 3.001
[z]: -0.501 , 0.501
[x]: -2.3 , 2.3
[y]: -3.001 , 3.001
[z]: -0.501 , 0.501
M

F(x,y,z)= 4*max( -(x+2) , min( -( x-2) , x*cos(pi/5)+y*sin(pi/5) ))^2+(2*z)^100+(y/3)^300-1
[x]: -2.5001 , 2.5001
[y]: -3 , 3.001
[z]: -0.501 , 0.501
[x]: -2.5001 , 2.5001
[y]: -3 , 3.001
[z]: -0.501 , 0.501
N

F(x,y,z)= 4*( (y^4+4*x^2)^(1/2)-2.5 )^2+(2*z)^100-1
[x]: -3 , 3
[y]: -3 , 3
[z]: -0.5001 , 0.5001
[x]: -3 , 3
[y]: -3 , 3
[z]: -0.5001 , 0.5001
O

F(x,y,z)= 4*min( x , abs(((abs(x)-0.8)^4+(y-1.25)^4)^(1/4)-1.25) )^2+(2*z)^100+(y/2.9)^200-1
[x]: -3 , 3
[y]: -3 , 3
[z]: -0.5001 , 0.5001
[x]: -3 , 3
[y]: -3 , 3
[z]: -0.5001 , 0.5001
P

F(x,y,z)= min( ( 4*( (y^4/4+4*x^2)^(1/2)-3.5 )^2 ) ,16*(x*cos(pi/5)+y*sin(pi/5) )^2+((y+2)/0.8)^200 )+(2*z)^100-1
[x]: -3 , 3
[y]: -3 , 3
[z]: -0.5001 , 0.5001
[x]: -3 , 3
[y]: -3 , 3
[z]: -0.5001 , 0.5001
Q

F(x,y,z)= min( 4*min( x , abs(((abs(x)-0.8)^4+(y-1.25)^4)^(1/4)-1.25) )^2+(2*z)^100+(y/2.9)^200-1 ,4*(x*cos(pi/10)+y*sin(pi/10)-1.2 )^2+((y+1.5)/1.5)^200+(2*z)^100-1 )
[x]: -3 , 3
[y]: -3 , 3
[z]: -0.5001 , 0.5001
[x]: -3 , 3
[y]: -3 , 3
[z]: -0.5001 , 0.5001
R

F(x,y,z)= 9*min( max( ( sqrt(x^2+(y-1.25)^2)-1.25 )^2 , min(x,-y+1.5) ) , max( ( sqrt(x^2+(-y-1.25)^2)-1.25 )^2 , min(-x,y+1.5) ) ) +(2*z)^100-1
[x]: -1.75 , 1.75
[y]: -3 , 3
[z]: -0.5001 , 0.5001
[x]: -1.75 , 1.75
[y]: -3 , 3
[z]: -0.5001 , 0.5001
S

F(x,y,z)= 4*min( abs(x) , -y+2.5 )^2+(2*z)^100+(y/3)^200+(x/1.5)^200-1
[x]: -1.5 , 1.5
[y]: -3 , 3.001
[z]: -0.501 , 0.501
[x]: -1.5 , 1.5
[y]: -3 , 3.001
[z]: -0.501 , 0.501
T

F(x,y,z)= 4*max(abs(x)-2 , sqrt(x^2+(y-2.6)^2)-5 )^2+(2*z)^100+(y/3)^200-1
[x]: -3.6 , 3.6
[y]: -3.001 , 3.001
[z]: -0.501 , 0.501
[x]: -3.6 , 3.6
[y]: -3.001 , 3.001
[z]: -0.501 , 0.501
U

F(x,y,z)= 4*(-abs(x)*cos(pi/10)+y*sin(pi/10)+1)^2+(2*z)^200+(y/3)^200-1
[x]: -2.6 , 2.6
[y]: -3.001 , 3.001
[z]: -0.501 , 0.501
[x]: -2.6 , 2.6
[y]: -3.001 , 3.001
[z]: -0.501 , 0.501
V

F(x,y,z)= 4*(-abs(abs(x)-1)*cos(pi/10)+y*sin(pi/10)+1)^2+(2*z)^200+(y/3)^200-1
[x]: -3.6 , 3.6
[y]: -3.001 , 3.001
[z]: -0.501 , 0.501
[x]: -3.6 , 3.6
[y]: -3.001 , 3.001
[z]: -0.501 , 0.501
W

F(x,y,z)= 4*min( abs(y*cos(pi/3)-x*sin(pi/3)) , abs(y*cos(-pi/3)-x*sin(-pi/3)) )^2+(2*z)^200+(y/3)^200-1
[x]: -2.3 , 2.3
[y]: -3.001 , 3.001
[z]: -0.501 , 0.501
[x]: -2.3 , 2.3
[y]: -3.001 , 3.001
[z]: -0.501 , 0.501
X

F(x,y,z)= 4*min( y*cos(pi/3)-x*sin(pi/3) , abs(y*cos(-pi/3)-x*sin(-pi/3)) )^2+(2*z)^200+(y/3)^200-1
[x]: -2.3 , 2.3
[y]: -3.001 , 3.001
[z]: -0.501 , 0.501
[x]: -2.3 , 2.3
[y]: -3.001 , 3.001
[z]: -0.501 , 0.501
Y

F(x,y,z)= 4*max( -(-y+2.5) , min( -( -y-2.5) , -y*cos(pi/3)+x*sin(pi/3) ))^2+(2*z)^100+(x/2)^300-1
[x]: -2.0001 , 2.0001
[y]: -3.0001 , 3.0001
[z]: -0.501 , 0.501
[x]: -2.0001 , 2.0001
[y]: -3.0001 , 3.0001
[z]: -0.501 , 0.501
Z
