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{alias:tub}
h2. Name

*tub* — Tube generation

h2. Syntax
{panel:|borderStyle=solid|borderWidth=1|bgColor=#FFFFAA}

*tub* \[_size_] \[*las*] \[*col*] \[*dra*] \[*sav*] 

{panel}

h2. Description

Polygon display in tube mode. 

h2. Arguments

{indent}No argument. Draw a tube for polydata using default settings.{indent} 
_size_ 
{indent}Apply size of tube, relative to 1.{indent} 
*sav* 
{indent}Will save the graphics of the tube as a dataset.{indent} 
*las* 
{indent}Draw the last line back to first point in the cell.{indent} 
*cel* 
{indent}Tube the cells independently.{indent} 
*col* \[*ran*] 
{indent}Tube the cells with color shift (at random).{indent} 

h2. Examples

h3. Ex.1: Random lines displayed as tubes

{noformat:|borderWidth=1|bgColor=#eeeeee}
        z                            ;# Erase screen
        win demo                     ;# Get demo window (450000 460000 6450000 6460000 1000 4000)
        spe bgc whi                  ;# Specify background color to white
        mak ran 6                    ;# Make random points
        cur sav nodraw               ;# Generate spline curve
        col red                      ;# Red color
        tub 10                       ;# Tube the line
        mak ran 7                    ;# Make random points
        cur sav nodraw               ;# Generate spline curve
        col gre                      ;# Green color
        tub 15                       ;# Tube the line
        mak ran 5                    ;# Make random points
        cur sav nodraw               ;# Generate spline curve
        col tur                      ;# Turqouise color
        tub 23                       ;# Tube the line
{noformat}
The above example produces this image. 

!att:_img_ref^cmd_tub.png!
_Random lines displayed as tubes_

h2. See also

[cur - Curve display], [dis - Display active dataset], [pot - Polygon with tube]
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