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3PTARB(nged)		     BRL-CAD User Commands		  3PTARB(nged)

NAME
       3ptarb -	Build an ARB8 shape by extruding a quadrilateral through a
       given thickness.

SYNOPSIS
       3ptarb [arb_name] [x1] [y1] [z1]	[x2] [y2] [z2] [x3] [y3] [z3] [x/y/z]
	      [coord1] [coord2]	[thickness]

DESCRIPTION
       Build an	ARB8 shape by extruding	a quadrilateral	through	a given
       thickness. The arguments	may be provided	on the command line; if	they
       are not,	they will be prompted for. The x1, y1, and z1 are the
       coordinates of one corner of the	quadrilateral. x2, y2, z2, and x3, y3,
       z3 are the coordinates of two other corners. Only two coordinates of
       the fourth point	are specified, and the code calculates the third
       coordinate to ensure all	four points are	coplanar. The x|y|z parameter
       indicates which coordinate of the fourth	point will be calculated by
       the code. The coord1 and	coord2 parameters supply the other two
       coordinates. The	direction of extrusion for the quadrilateral is
       determined from the order of the	four resulting points by the
       right-hand rule;	the quadrilateral is extruded toward a viewer for whom
       the points appear in counter-clockwise order.

EXAMPLES
       The following are run from the MGED command prompt:

       Example 1. 3ptarb example with BRL-CAD prompting	for information

       mged> 3ptarb
	   Start the 3ptarb command.

       Enter name for this arb:	thing
	   The new ARB8	will be	named thing.

       Enter X,	Y, Z for point 1: 0 0 0
	   Point one is	at the origin.

       Enter X,	Y, Z for point 2: 1 0 0
	   Point two is	at (1, 0, 0).

       Enter X,	Y, Z for point 3: 1 1 0
	   Point three is at (1, 1, 0).

       Enter coordinate	to solve for (x, y, or z): z
	   The code will calculate the z coordinate of the fourth point.

       Enter the X, Y coordinate values: 0 1
	   The x and y coordinates of the fourth point are 0 and 1.

       Enter thickness for this	arb: 3
	   The new ARB8	will be	3 units	thick.

       Example 2. 3ptarb command as single line	input

       mged>3ptarb thing 0 0 0 1 0 0 1 1 0 z 0 1 3

       Same as above example, but with all arguments supplied on the command
       line.

AUTHOR
       BRL-CAD Team

BUG REPORTS
       Reports of bugs or problems should be submitted via electronic mail to
       devs@brlcad.org

BRL-CAD				  03/02/2021			  3PTARB(nged)

NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | AUTHOR | BUG REPORTS

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