3D plotter

fastgraphics

clg : font "arial",15,100

graphsize 600,600

zoom=5 : max=5 : point=0

for z = -max to max step .1

for y = -max to max step .1

for x = -max to max step .1

Rem change this bit

if (x^2+y^2<1+z^2)then

if abs(x)>(max-.1) or abs(y)>(max-.1) or abs(z)>(max-.1) then rc=0

color rgb( 100+x*(100/max)+rand*rc,100+y*(100/max)+rand*rc,100+z*(100/max)+rand*rc)

point=point+1

gosub graph

else

if (abs(z)<0.01 and abs(y)<0.01) or (abs(x)<0.01 and abs(y)<0.01) or (abs(x)<0.01 and abs(z)<0.01) then

color black

if z>max-.1 then text sx+5,sy-10,"z="+max

if x>max-.1 then text sx+5,sy-10,"x="+max

if y>max-.1 then text sx+5,sy-10,"y="+max

refresh

gosub graph

end if

end if

next x

next y

refresh

next z

print "Aproximate volume ="+point/1000

graph:

prespective=1+(-3*max+x+y+z)/50

sx = 300+ (x*7-y*7)*zoom*prespective

sy = 300+ (-z*7+y*3+x*3)*zoom*prespective

circle sx,sy,2

rc=50

return