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eFFview parameters

Tables 4.1 and 4.2 list eFFview parameters that can be set by placing into a file effview.params lines of the form:

  electron_scale = 0.5
  electron_up_color = 0.0 1.0 0.0
The above example scales electrons to half their usual size, and makes up spin electrons green. The color is specified as a red/green/blue triplet, where each color coefficient ranges from zero to one.

The parameter nuc_property is different from the others in that it can be set multiple times. It takes as arguments Z, the nuclear charge; r/g/b, the nucleus color; the covalent radius in bohr; and the mass in atomic mass units. For example, the lines below make both hydrogen and carbon grey in color, while leaving unaffected the default values for the other nuclei:

  nuc_property = 1 0.5 0.5 0.5 1.0 1.008
  nuc_property = 6 0.5 0.5 0.5 1.5 12.01

Any parameters not explicitly set in effview.params will be set to the default values listed in the Tables 4.1 and 4.2.

If the file effview.params is not present, eFFview will create a new file listing all the parameters and their default values.


Table 4.1: eFFview settable parameters in effview.params, part 1 of 2.
Parameter Default value Comments
Nucleus display    
nucleus_scale 0.5  
     
Electron display    
electron_scale 1.0  
electron_up_color 1.0 0.4 0.4  
electron_down_color 0.4 0.4 1.0  
electron_pair_color 0.7 0.7 0.7  
electron_opacity 0.5 when both nuclei/electrons displayed
electron_max_size 5.0 ionization threshold
electron_min_size 0.5 very small electrons not displayed
electron_scale_1 1.0 key preset 1
electron_scale_2 0.5 key preset 2
electron_scale_3 0.2 key preset 3
electron_scale_4 0.1 key preset 4
electron_make_pairs yes key s
     
Bond display    
show_bonds yes key b
bond_threshold 1.2 times sum of covalent radii
dotted_bond_threshold 1.5 times sum of covalent radii
bond_cylinder_width 1.0  
bond_line_width 4.0 for lowest level of detail
bond_line_color 0.5 0.5 0.5  
     
Velocity arrow display    
show_velocity_arrows no key v
velocity_arrow_threshold 0.1  
velocity_arrow_length_scale 10.0  
velocity_arrow_width 1.0  



Table 4.2: eFFview settable parameters in effview.params, part 2 of 2.
Parameter Default value  
Possible graphics glitches    
fast_frame_graphics yes set to no if graphics glitches
front_buffer_bug no set to yes if graphics glitches
     
Periodic bounding box    
bound_box_line_width 1.0  
bound_box_color 0.0 0.0 0.0  
bound_box_2d_numlines 4.0 for 2D periodic boundary cage
     
Frame display    
frames_per_sec 500  
min_all_frame_display 3.0 total seconds minimum display time
auto_center no automatically keeps system centered
     
Movie controls    
num_movie_frames 200 number of frames to put in movie
movie_start_frame 1 start frame
movie_end_frame 0 end frame (0 to use whole length)
make_rotate_movie no do 360o rotation of one frame
rotate_movie_axis 1.0 0.0 0.0 axis of rotation
     
User interface    
mouse_widget_color 0.5 0.5 1.0 spaceball and translation
mouse_widget_opacity 0.2  
timer_area_color 0.0 0.0 0.0  
timer_area_opacity 0.6  
timer_shaded_color 0.0 0.0 0.0  
timer_shaded_opacity 0.3  
timer_text_color 0.0 0.0 0.0  
spaceball_fraction 0.8 spaceball size
translate_fraction 0.8 translate pad size
zoom_multiplier 1.05 per scroll wheel click
message_fade_time 0.7 in seconds
message_text_foreground 1.0 1.0 1.0  
message_text_background 0.0 0.0 0.0  
help_text_foreground 0.0 0.0 0.0  
help_text_foreground_opacity 1  
help_text_background 1.0 1.0 1.0  
help_text_background_opacity 0.75  
     
Nucleus Z, color, radius, mass    
(radius in bohr, mass in amu)    
nucleus_property 1 0.93 1.0 1.0  
  1.0 1.00794  



next up previous contents index
Next: Possible graphics glitches Up: The eFFview visualizer Previous: Saving snapshots and movies   Contents   Index
Julius 2008-04-29