# Simple bouncing molecules in a 3-D system
# test of ifdefine statements

define SHOWBLUE
#undefine SHOWBLUE

graphics opengl

dim 3
species red green blue
max_mol 200

difc red 3
difc green 1
difc blue 2

color red 1 0 0
color green 0 1 0
color blue 0 0 1

time_start 0
time_stop 100
time_step 0.01

boundaries 0 0 100 r
boundaries 1 0 100 r
boundaries 2 0 100 r

ifdefine SHOWBLUE
  mol 50 blue u 90-100 u
else
  mol 30 green u u u
endif
mol 100 red 20 30 20

end_file