Options

Options
Technical Article

Options may be set to modify the behavior of ACIS. An option's value may be a flag (indicating an on/off state), a number (integer or real number), or a string. Options may be set in a Scheme application (such as Scheme AIDE) using the Scheme extension option:set; or in a C++ application using one of several API functions.

ihl_lines
ihl_lines_style
ihl_occlusion
ihl_occlusion_tol
ihl_wire

ihl_lines

Action

Sets the drawing of hidden lines on or off.

Name String

ihl_lines

Scheme

Type	Values	Default
boolean	#f,#t	#f

Description
This option turns the drawing of hidden lines on or off.

; ihl_lines ; Turn option on (option:set "ihl_lines" #t) ;; #f

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ihl_lines_style

Action

Sets the drawing line style of hidden lines.

Name String

ihl_lines_style

Scheme

Type	Values	Default
integer	-7 . . .7	0

Description The ihl_lines_style option determines how hidden lines are drawn. This option is valid only if the ihl_lines option is on. The possible values and there meaning are:: 0 hidden lines are drawn as dashed lines with the same color as visible lines. This setting works with X Windows driver graphics only.; +n hidden lines are drawn as solid lines with the color specified by n, where n is between 1 and 7, inclusive.; -n hidden lines are drawn as dashed lines with the color specified by n, where n is between 1 and 7, inclusive.

The color values 1 through 7 are red, green, blue, cyan, yellow, magenta, and white.

; ihl_lines_style ; Turn on drawing of hidden lines (option:set "ihl_lines" #t) ;; #f ; Tell IHL to draw solid hidden lines (option:set "ihl_lines_style" 2) ;; 0

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ihl_occlusion

Action

Sets the removal of overlapping segments in a viewing configuration on or off.

Name String

ihl_occlusion

Scheme

Type	Values	Default
boolean	#f,#t	#f

C++

Type	Values	Default
logical	FALSE,TRUE	FALSE

Description
If this option is set on (TRUE) it will turn occlusion on. If this option is set off (FALSE) it will turn occlusion off.

; ihl_occlusion ; Turn on removal of overlapping segments (option:set "ihl_occlusion" #t) ;; #f

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ihl_occlusion_tol

Action

Sets the tolerance for occlusion.

Name String

ihl_occlusion_tol

Scheme

Type	Values	Default
real	SPAresabs	SPAresfit

C++

Type	Values	Default
double	SPAresabs	SPAresfit

Description
This option sets up the tolerance for occlusion to SPAresfit. The valid values for occlusion tolerance must be greater than SPAresabs.

; ihl_occlusion_tol ; Set the tolerance for removal of overlapping segments (option:set "ihl_occlusion_tol" 0.001) ;; 0.001

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ihl_wire

Action

Sets hidden line removal for wires.

Name String

ihl_wire

Scheme

Type	Values	Default
boolean	#f,#t	#t

C++

Type	Values	Default
logical	FALSE, TRUE	TRUE

Description
This option turns on hidden line removal for wires when set to TRUE, and turns off hidden line removal for wires when set to FALSE.

; ihl_wire ; Set hidden line removal for wires (option:set "ihl_wire" #f) ;; #t

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