GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  ANIM_OFFSET (n)

.ds Aq ’

NAME

anim_offset - create an animation table for an object rigidly attached to another object.

CONTENTS

SYNOPSIS

anim_offset -o # # # [-r] in.table out.table

DESCRIPTION

This filter operates on animation tables of the type used by tabsub and anim_script. Given a table specifying the position and orientation of one object at every applicable time, anim_offset calculates the position of another object which is rigidly attached to it.

The columns of the input table should be time, three columns of position, followed by yaw, pitch, and roll. The output will normally be a four-column file specifying time and position. If the -r option is used, the output is a seven-column file in which the last three columns are copies of the orientation information from the input file.

The position of the object relative to the rigid body should be given on the command line in the order x, y, z, with the -o # # # option. These offset values should be as measured from the centroid of the rigid body.

EXAMPLES

This filter could be used, for example, to do an animation where the camera is placed inside a moving vehicle.

Suppose that truck.table contains the desired position of the center of the front axle of the truck as well as its orientation at each time. One row of the table might look like this:

35.2    12450   -140    600     90.0    0.0     0.0

Thus 35.2 seconds into the animation, the center of the front axle will be at (12450, -140, 600), and the truck will be pointed in the positive y direction. (yaw = 90).

Now, suppose we want the camera to ride along in the cab, above and behind the front axle and somewhat to the left. To specify this offset, we use the coordinate frame of the truck, with the origin at the center of the front axle, the x-axis to the front, y to the left, and z pointing up. Let the exact offset from the axle to the desired camera position in this case be (-600, 900, 1200), in units of mm. Now we use the routine:

anim_offset -o -600 900 1200 < truck.table > camera.table

The result is a four-column table giving the desired position of the virtual camera at each time. The row corresponding to the sample row above would be:

35.2    11550   -740    1800

With the -r option, the output would have been:

35.2    11550   -740    1800    90.0    0.0     0.0

Now tabsub and/or anim_script can be used to process these two animation tables into an animation script.

BUGS

The program will only use orientations specified as yaw, pitch, and roll. You can get around this using anim_orient, which converts between different orientation representations.

AUTHOR

Carl J. Nuzman

COPYRIGHT

This software is Copyright (c) 1993-2013 by the United States Government as represented by U.S. Army Research Laboratory.

BUG REPORTS

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

Search for    or go to Top of page |  Section n |  Main Index


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

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.