The GIF movie was composed by regenerating the GIFs at a reduced size and combining using the ImageMagick convert utility.
The MPEG movie was directly encoded from reduced-sized (320x320) GIFs using the mpeg_encode program. For some reason the full-size GIFs encoded funny. MPEG is weird.
Go to: [Movie Page| Details Index]
The GIFs were converted into PICT format using the ImageMagick convert program, and then combined into a QuickTime movie on a Mac Performa using MooVer v1.3. The movie was composed at 24 frames/second with video compression.
The GIF movie was composed by regenerating the GIFs at a reduced size and combining using the ImageMagick convert utility.
The MPEG movie was directly encoded from reduced-sized (480x360) GIFs using the mpeg_encode program.
Go to: [Movie Page| Details Index]
A 3-rd order Keplerian orbit calculator was used, with user input for the eccentricity, inclination with respect to the line of sight, and the apsidal angle (angle of the long-axis of the orbits with respect to the plane of the sky). A green dot is used to mark the location of the center-of-mass of the system.
The first movie is of a circular orbit (e=0) seen with the plane of the orbit in the plane of the sky.
The second movie is of an elliptical orbit (e=0.4) also with the orbital plane in the sky plane, but with the angle of apsides rotated 45°.
The GIFs were converted into uncompressed PICT files using the GraphicConverter program on a Mac Performa, and then combined into a QuickTime movie using MooVer v1.3. Each movie was composed at 12 frames/second with video compression.
The MPEG movies were directly encoded from the GIFs using the mpeg_encode program (using on-the-fly conversion to PPM with giftoppm). The encoding is still jumpier than I'd like, and I hope to refine them over time.
The GIF movies were composed by regenerating the GIFs at a reduced size and combining using the ImageMagick convert utility. The quality of the stellar photosphere rendering is noticeably superior to that in the QT movies.
Go to: [Movie Page| Details Index]
The spectral line shifts were computed using the projected velocity along the plot's X-axis. The relative Doppler shift is greatly exaggerated to aid visibility. The color bar in the background of the spectrum was generated from 65 RGB points across a standard "rainbow" color lookup table.
The GIFs were converted into uncompressed PICT files using the GraphicConverter program on a Mac Performa, and then combined into a QuickTime movie using MooVer v1.3. The movie was composed at 12 frames/second with video compression.
The MPEG movie was directly encoded from the GIFs using the mpeg_encode program (using on-the-fly conversion to PPM with giftoppm). The encoding is still jumpier than I'd like, suggestions are welcome.
The GIF movie was composed by regenerating the GIFs at a reduced size and combining using the ImageMagick convert utility. The quality of the stellar photosphere rendering is noticeably superior to that in the QT movie.
Go to: [Movie Page| Details Index]
Some of the smoothness of this rendering is lost in the video compression for the QuickTime movie, but appears in the animated GIF. The light-curve was computed directly assuming uniform surface-brightness stellar disks (no limb darkening) for simplicity.
The GIFs were converted into uncompressed PICT files using the GraphicConverter program on a Mac Performa, and then combined into a QuickTime movie using MooVer v1.3. The movie was composed at 12 frames/second with video compression.
The MPEG movie was directly encoded from the GIFs using the mpeg_encode program (using on-the-fly conversion to PPM with giftoppm). The encoding is still jumpier than I'd like, suggestions are welcome.
The GIF movie was composed by regenerating the GIFs at a reduced size and combining using the ImageMagick convert utility. The quality of the stellar photosphere rendering is noticeably superior to that in the QT movie.
Go to: [Movie Page| Details Index]
Updated: 2016 May 14 [rwp]