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{alias:opa} |
Name
opa — Opacity
Syntax
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opa opacity [l] [all] |
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Set opacity to one or more displayed objects.
Arguments
opacity
A number between 0 and 1, where 1 is no opacity. With no further arguments, this will be applied to current actor list.
l from to
Actorlist from from to to, from and to are actor list numbers (integers).
all
All actor lists are given the opacity.
Examples
Ex.1: Opacity for display lists
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z ;# Erase screen
win demo ;# Get demo window (450000 460000 6450000 6460000 1000 4000)
spe bgc whi ;# Specify background color to white
mak ran 11 ;# Make 11 random points
grp 222 222 ;# Make grid
oco frq 14 col bla liw 2 ;# Draw orthogonal contours
oco dar ;# Calculate drainage areas
map drain ;# Map the drainage areas
cln 2 ;# Shift to display list 2
gen 44 44 44 ;# Generate a dummy cube
mak ras ;# Make random scalars
dis ;# Display the cube
opa .4 ;# Set opacity 0.4 in display list 2
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