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Man Pages


Manual Reference Pages  -  ARCED (n)

.ds Aq ’

NAME

arced - Provides a means for directly editing transformation matrices of Boolean tree leaves.

CONTENTS

SYNOPSIS

arced {comb/memb} {anim_command}

DESCRIPTION

The objects in a BRL-CAD model are stored as Boolean combinations of primitive shapes and/or other combinations. These combinations are stored as Boolean trees, with each leaf of the tree including a corresponding transformation matrix. The arced command provides a means for directly editing these matrices. The first argument to the arced command must identify the combination and which members matrix is to be edited. The comb/memb argument indicates that member memb of combination comb has the matrix to be edited. The remainder of the arcedcommand line consists of an animation command to be applied to that matrix. The available animation commands are:

matrix rarc <xlate|rot> matrix elements

Replace the members matrix with the given matrix.

matrix lmul <xlate|rot> matrix elements

Left multiply the members matrix with the given matrix.

matrix rmul <xlate|rot> matrix elements

Right multiply the members matrix with the given matrix.

EXAMPLES

Example 1. Rotate body/head 45 degrees about Z axis

mged> arced body/head matrix rot 0 0 45

Rotates member head (in combination body) about the z axis through a 45° angle. By default, the matrix commands expect a list of 16 matrix elements to define a matrix. The xlate option may be used along with three translation distances in the x, y, and z directions (in mm) as a shorthand notation for a matrix that is pure translation. Similarly, the rot option along with rotation angles (degrees) about the x, y, and z axes may be used as shorthand for a matrix that is pure rotation.

AUTHOR

BRL-CAD Team

BUG REPORTS

Reports of bugs or problems should be submitted via electronic mail to <devs@brlcad.org>, or via the "cadbug.sh" script.

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BRL-CAD ARCED (nged) 04/04/2016

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