Renders a movie using the av or gifski packages. Moves the camera around a 3D visualization using either a standard orbit, or accepts vectors listing user-defined values for each camera parameter. If the latter, the values must be equal in length to `frames` (or of length `1`, in which the value will be fixed).

  type = "orbit",
  frames = 360,
  fps = 30,
  phi = 30,
  theta = 0,
  zoom = NULL,
  fov = NULL,
  width = NULL,
  height = NULL,
  title_text = NULL,
  title_offset = c(20, 20),
  title_color = "black",
  title_size = 30,
  title_font = "sans",
  title_bar_color = NULL,
  title_bar_alpha = 0.5,
  image_overlay = NULL,
  vignette = FALSE,
  vignette_color = "black",
  vignette_radius = 1.3,
  title_position = "northwest",
  audio = NULL,
  progbar = interactive(),



Filename. If not appended with `.mp4`, it will be appended automatically. If the file extension is `gif`, the gifski package will be used to generate the animation.


Default `orbit`, which orbits the 3D object at the user-set camera settings `phi`, `zoom`, and `fov`. Other options are `oscillate` (sine wave around `theta` value, covering 90 degrees), or `custom` (which uses the values from the `theta`, `phi`, `zoom`, and `fov` vectors passed in by the user).


Default `360`. Number of frames to render.


Default `30`. Frames per second. Recommmend either 30 or 60 for web.


Defaults to current view. Azimuth values, in degrees.


Default to current view. Theta values, in degrees.


Defaults to the current view. Zoom value, between `0` and `1`.


Defaults to the current view. Field of view values, in degrees.


Default `NULL`, uses the window size by default. Width of the movie. Note that the frames will still be captured at the resolution (and aspect ratio) of the rgl window.


Default `NULL`, uses the window size by default. Height of the movie. Note that the frames will still be captured at the resolution (and aspect ratio) of the rgl window.


Default `NULL`. Text. Adds a title to the movie, using magick::image_annotate.


Default `c(20,20)`. Distance from the top-left (default, `gravity` direction in image_annotate) corner to offset the title.


Default `black`. Font color.


Default `30`. Font size in pixels.


Default `sans`. String with font family such as "sans", "mono", "serif", "Times", "Helvetica", "Trebuchet", "Georgia", "Palatino" or "Comic Sans".


Default `NULL`. If a color, this will create a colored bar under the title.


Default `0.5`. Transparency of the title bar.


Default `NULL`. Either a string indicating the location of a png image to overlay over the whole movie (transparency included), or a 4-layer RGBA array. This image will be resized to the dimension of the movie if it does not match exactly.


Default `FALSE`. If `TRUE` or numeric, a camera vignetting effect will be added to the image. `1` is the darkest vignetting, while `0` is no vignetting. If vignette is a length-2 vector, the second entry will control the blurriness of the vignette effect.


Default `"black"`. Color of the vignette.


Default `1.3`. Radius of the vignette, as a porportion of the image dimensions.


Default `northwest`. Position of the title.


Default `NULL`. Optional file with audio to add to the video.


Default `TRUE` if interactive, `FALSE` otherwise. If `FALSE`, turns off progress bar. Will display a progress bar when adding an overlay or title.


Additional parameters to pass to magick::image_annotate.


if(interactive()) {
filename_movie = tempfile()

#By default, the function produces a 12 second orbit at 30 frames per second, at 30 degrees azimuth.
# \donttest{
montereybay %>%
 sphere_shade(texture="imhof1") %>%
 plot_3d(montereybay, zscale=50, water = TRUE, watercolor="imhof1", 
         waterlinecolor="white", waterlinealpha=0.5)
#Un-comment the following to run:
#render_movie(filename = filename_movie)
# }    
filename_movie = tempfile()

#You can change to an oscillating orbit. The magnification is increased and azimuth angle set to 30.
#A title has also been added using the title_text argument.
# \donttest{
#Un-comment the following to run:
#render_movie(filename = filename_movie, type = "oscillate", 
#             frames = 60,  phi = 30, zoom = 0.8, theta = -90,
#             title_text = "Monterey Bay: Oscillating")
# }             
filename_movie = tempfile()

#Finally, you can pass your own set of values to the 
#camera parameters as a vector with type = "custom".

phivechalf = 30 + 60 * 1/(1 + exp(seq(-7, 20, length.out = 180)/2))
phivecfull = c(phivechalf, rev(phivechalf))
thetavec = -90 + 45 * sin(seq(0,359,length.out = 360) * pi/180)
zoomvec = 0.45 + 0.2 * 1/(1 + exp(seq(-5, 20, length.out = 180)))
zoomvecfull = c(zoomvec, rev(zoomvec))
# \donttest{
#Un-comment the following to run
#render_movie(filename = filename_movie, type = "custom", 
#             frames = 360,  phi = phivecfull, zoom = zoomvecfull, theta = thetavec)
# }