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input boxes;
beginfig(1)
pair A, B, C;
A:=(0,0); B:=(1cm,0); C:=(0,1cm);
draw A--B--C;
endfig;
beginfig(2)
pair A, B, C;
A:=(0,0); B:=(1cm,0); C:=(0,1cm);
draw A--B--C--cycle;
endfig;
beginfig(4)
pair A;
A:=(0,0); B:=(1cm,0); C:=(0,1cm);
draw A withpen pencircle scaled 4bp;
endfig;
beginfig(5)
pair A, B, C;
A:=(0,0); B:=(1cm,0); C:=(0,1cm);
draw A--B--C--cycle;
draw A withpen pencircle scaled 4bp;
draw B withpen pencircle scaled 4bp;
draw C withpen pencircle scaled 4bp;
endfig;
beginfig(7)
pair A, B, C;
A:=(0,0); B:=(1cm,0); C:=(0,1cm);
draw A--B--C--cycle;
draw 1/2[A,B] -- C;
draw 1/2[B,C] -- A;
draw 1/2[C,A] -- B;
endfig;
beginfig(12)
pair A, B, C;
A:=(0,0); B:=(1cm,0); C:=(0,1cm);
draw A--B withpen pencircle scaled 2bp withcolor .8white;
draw B--C withpen pencircle scaled 2bp withcolor .6white;
draw C--A withpen pencircle scaled 2bp withcolor .4white;
endfig;
beginfig(20)
pair A, B, C;
A:=(0,0); B:=(1cm,0); C:=(0,1cm);
fill A--B--C--cycle withcolor .8 white;
endfig;
beginfig(21)
pair A, B, C;
A:=(0,0); B:=(1cm,0); C:=(0,1cm);
fill A--B--C--cycle withcolor .8 white;
draw A--B--C--cycle;
endfig;
beginfig(22)
pair A, B, C;
A:=(0,0); B:=(1cm,0); C:=(0,1cm);
fill A--B--C--cycle withcolor .8 white;
draw A--B--C--cycle withpen pencircle scaled 2bp;
endfig;
beginfig(23)
pair A, B, C;
A:=(0,0); B:=(1cm,0); C:=(0,1cm);
draw A--B--C--cycle withpen pencircle scaled 2bp;
fill A--B--C--cycle withcolor .8 white;
endfig;
beginfig(60)
u:=.5cm;
pair A,B,C,D;
A:=(0,0); B:=(-u,2u);
C:=(4u,3u); D:=(3u,0);
draw A.. controls B and C .. D
withpen pencircle scaled 2pt;
% draw B--C dashed evenly;
draw B--C withcolor .8 white;
drawarrow A--B;
drawarrow D--C;
endfig;
beginfig(111)
path a,b,c;
a = fullcircle scaled 2cm shifted (.5cm,0);
b = a rotated (360/3);
c = b rotated (360/3);
fill a withcolor red;
fill b withcolor green;
fill c withcolor blue;
fill buildcycle(a,b) withcolor red + green;
fill buildcycle(b,c) withcolor green + blue;
fill buildcycle(c,a) withcolor blue + red;
fill buildcycle(a,b,c) withcolor white;
draw a; draw b; draw c;
endfig;
beginfig(130)
transform T;
u:=1cm;
z0=(0,0); z1=(2u,0); z3 = z1 rotated 90; z2 = z1+z3;
z0 transformed T = .1[z0,z1];
z1 transformed T = .1[z1,z2];
z2 transformed T = .1[z2,z3];
path p;
p = z0--z1--z2--z3--cycle;
for i=0 upto 50:
fill p withcolor .8*white;
p := p transformed T;
fill p withcolor white;
p := p transformed T;
endfor;
endfig;
beginfig(140)
for i=1 step -.01 until 0:
fill fullcircle scaled (i*2cm) withcolor i*white;
endfor;
draw fullcircle scaled 2cm withpen pencircle scaled 2bp;
endfig;
% beginfig(141)
% u:=5mm;
% path p;
% p = (0,0) .. (-1,1) .. (2,0) .. (0,-3) .. cycle;
% p := p shifted (-1,0);
% for i=1 step -.01 until 0:
% fill p scaled (i*u) withcolor i*white;
% endfor;
% draw p scaled u withpen pencircle scaled 2bp;
% endfig;
beginfig(149)
def couleur(expr x) =
if x>.5: (2*(1-x)) [red, blue];
else: (1-2x) [blue, red]
fi
enddef;
for i=0 step .5 until 360:
draw 2cm* (sind(2*i), cosd(3*i))
withpen pencircle scaled 2bp
withcolor couleur(i/360);
endfor;
endfig;
beginfig(195)
n:=8;
u:=5mm;
for i=0 upto n-1:
for j=0 upto n-1:
if odd(i+j):
for k=0 step u/5 until 4/5 u:
if odd(k*5/u):
fill ( (k,0)--(u,u-k)--(u,u-k-u/5)--
(k+u/5,0)--cycle )
shifted (i*u,j*u) withcolor .8white;
else:
fill ( (0,k)--(u-k,u)--(u-k-u/5,u)--
(0,k+u/5)--cycle )
shifted (i*u,j*u) withcolor .8white;
fi;
endfor;
fi;
endfor;
endfor;
for i=0 upto n:
draw (0,i*u)--(n*u,i*u);
draw (i*u,0)--(i*u,n*u);
endfor;
endfig;
beginfig(267)
def drawredboxed(text t) =
forsuffixes a=t:
fill bpath a withcolor .5[red,white];
endfor;
drawboxed(t);
enddef;
circleit.a(btex D\'ebut etex);
a.c = (0,0);
a.dx = a.dy;
circleit.b(btex Fin etex);
b.c = (2cm,0);
b.dx = b.dy;
drawredboxed(a,b);
drawarrow a.c {dir 45} .. b.c {dir -45}
cutbefore bpath.a cutafter bpath.b;
drawarrow b.c {dir -135} .. a.c {dir 135}
cutbefore bpath.b cutafter bpath.a;
endfig;
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