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Name

opa — Opacity

Syntax

Panel
bgColor#FFFFAA
borderWidth1
borderStylesolid

opa opacity [l] [all]

Description

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 tofrom and to are actor list numbers (integers).

all

All actor lists are given the opacity.

Examples

Ex.1: Opacity for display lists

No Format
bgColor#eeeeee
borderWidth1
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
{noformat}

The

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above

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example

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produces

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image.

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Image Added
Opacity in cube

See also

acp opa , dis opa , map opa , amb - Ambient light