rgl (version 0.77)

play3d: Play animation of rgl scene

Description

play3d calls a function repeatedly, passing it the elapsed time in seconds, and using the result of the function to reset the viewpoint. movie3d does the same, but records each frame to a file to make a movie.

Usage

play3d(f, duration = Inf, dev = rgl.cur(), ...)
movie3d(f, duration, dev = rgl.cur(), ..., fps = 10, 
                    movie = "movie", frames = movie, dir = tempdir(), 
                    convert = TRUE, clean = TRUE, verbose=TRUE,
                    top = TRUE)

Arguments

f

A function returning a list that may be passed to par3d

duration

The duration of the animation

dev

Which rgl device to select

...

Additional parameters to pass to f.

fps

Number of frames per second

movie

The base of the output filename, not including .gif

frames

The base of the name for each frame

dir

A directory in which to create temporary files for each frame of the movie

convert

Whether to try to convert the frames to a single GIF movie, or a command to do so

clean

If convert is TRUE, whether to delete the individual frames

verbose

Whether to report the convert command and the output filename

top

Whether to call rgl.bringtotop before each frame

Value

• This function is called for the side effect of its repeated calls to f. It returns NULL invisibly.

Details

The function f will be called in a loop with the first argument being the time in seconds since the start (where the start is measured after all arguments have been evaluated). play3d is likely to place a high load on the CPU; if this is a problem, calls to Sys.sleep should be made within the function to release time to other processes. movie3d saves each frame to disk in a filename of the form "framesXXX.png", where XXX is the frame number, starting from 0. If convert is TRUE, it uses ImageMagick to convert them to an animated GIF. Alternatively, convert can be a command to execute in the standard shell (wildcards are allowed). All work is done in the directory dir, so paths are not needed in the command. The top=TRUE default is designed to work around an OpenGL limitation: in some implementations, rgl.snapshot will fail if the window is not topmost.

See Also

spin3d and par3dinterp return functions suitable to use as f. See demo(flag) for an example that modifies the scene in f.

Examples

open3d()
plot3d( cube3d(col="green") )
M <- par3d("userMatrix")
play3d( par3dinterp( userMatrix=list(M,
                                     rotate3d(M, pi/2, 1, 0, 0),
                                     rotate3d(M, pi/2, 0, 1, 0) ) ), 
        duration=4 )
movie3d( spin3d(), duration=5 )