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{alias:c3d}
h2. Name

*c3d* — Contour with 3D surfaces

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

*c3d* *i* | *v* | *s* | *n* | *l* \[*col*] \[*map*] \[*csh*] \[*sav*] \[*bsu*] \[*bou*] \[*nor*] \[*eli* _limit_] 

{panel}

h2. Description

Map 3D grid (cube) with contour surfaces representing the same iso value. 

h2. Arguments

*i* _increment_ 
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Enter increment value 
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*v* _c_val1_ \[_c_val2_ _c_val3_ ...] 
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Enter distinct contour level values 
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*s* _start_ _increment_ _stop_ 
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Enter start increment stop values 
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*n* _number_of_levels_ 
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Enter number_of_levels
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*col* \[*red* | *gre* |...] 
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Use the same colour \[*red* | *gre* |...] on all surfaces. 
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*map* 
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Map the iso surfaces wth the *map* command. 
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*csh* 
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Color the iso surfaces with shifting colors. 
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*sav* 
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Color the iso surfaces with shifting colors. 
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*csh* 
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Surface(s) will be saved in ^c3d0, ^c3d1, ^c3d2, .... 
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*bsu* 
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Boundary surface around defined data. 
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*nor* 
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Smooth display with normal (Gouraud) vectors. 
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*eli* _limit_ 
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Eliminate isosurfaces with number of points lower than _limit_. 
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h2. Examples

h3. Ex.1: Contouring of 3d surfaces in a cube

{noformat:|borderWidth=1|bgColor=#eeeeee}
        # generate cube and display 3D contours
        mak ran 11   ;#  make 11 random points
        gr3 12 12 12 ;#  make cube of dimension 12 x 12 x 12
        dis opa .3   ;#  display cube with opacity .3
        c3d n 4      ;#  contour 4 iso surfaces
{noformat}

The above example produces this image.

!att:_img_ref^cmd_c3d.png|border=1!
_3D contours in a cube_

h2. See also

[acm - Color band mapping], [ima sla|ima - Image handling], [sma - Spline map], [map - Map display]
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