render_snapshot: Render Snapshot of 3D Visualization

In rayshader: Create Maps and Visualize Data in 2D and 3D

Render Snapshot of 3D Visualization

Description

Either captures the current rgl view and displays, or saves the current view to disk.

Usage

render_snapshot(
  filename,
  clear = FALSE,
  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,
  title_position = "northwest",
  image_overlay = NULL,
  vignette = FALSE,
  vignette_color = "black",
  vignette_radius = 1.3,
  instant_capture = interactive(),
  bring_to_front = FALSE,
  webshot = FALSE,
  width = NULL,
  height = NULL,
  software_render = FALSE,
  camera_location = NULL,
  camera_lookat = c(0, 0, 0),
  background = NULL,
  text_angle = NULL,
  text_size = 30,
  text_offset = c(0, 0, 0),
  point_radius = 2,
  line_offset = 1e-07,
  thick_lines = TRUE,
  line_radius = 0.5,
  cache_scene = FALSE,
  reset_scene_cache = FALSE,
  new_page = TRUE,
  print_scene_info = FALSE,
  fsaa = 1,
  rayvertex_lighting = FALSE,
  rayvertex_lights = NULL,
  rayvertex_shadow_map = FALSE,
  ...
)

Arguments

filename	Filename of snapshot. If missing, will display to current device.
clear	Default 'FALSE'. If 'TRUE', the current 'rgl' device will be cleared.
title_text	Default 'NULL'. Text. Adds a title to the image, using magick::image_annotate.
title_offset	Default 'c(20,20)'. Distance from the top-left (default, 'gravity' direction in image_annotate) corner to offset the title.
title_color	Default 'black'. Font color.
title_size	Default '30'. Font size in pixels.
title_font	Default 'sans'. String with font family such as "sans", "mono", "serif", "Times", "Helvetica", "Trebuchet", "Georgia", "Palatino" or "Comic Sans".
title_bar_color	Default 'NULL'. If a color, this will create a colored bar under the title.
title_bar_alpha	Default '0.5'. Transparency of the title bar.
title_position	Default 'northwest'. Position of the title.
image_overlay	Default 'NULL'. Either a string indicating the location of a png image to overlay over the image (transparency included), or a 4-layer RGBA array. This image will be resized to the dimension of the image if it does not match exactly.
vignette	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.
vignette_color	Default '"black"'. Color of the vignette.
vignette_radius	Default '1.3'. Radius of the vignette, as a porportion of the image dimensions.
instant_capture	Default 'TRUE' if interactive, 'FALSE' otherwise. If 'FALSE', a slight delay is added before taking the snapshot. This can help stop prevent rendering issues when running scripts.
bring_to_front	Default 'FALSE'. Whether to bring the window to the front when taking the snapshot.
webshot	Default 'FALSE'. Set to 'TRUE' to have rgl use the 'webshot2' package to take images, which can be used when 'rgl.useNULL = TRUE'.
width	Default 'NULL'. Optional argument to pass to 'rgl::snapshot3d()' to specify the width when 'software_render = TRUE'..
height	Default 'NULL'. Optional argument to pass to 'rgl::snapshot3d()' to specify the height when 'software_render = TRUE'.
software_render	Default 'FALSE'. If 'TRUE', rayshader will use the rayvertex package to render the snapshot, which is not constrained by the screen size or requires OpenGL.
camera_location	Default 'NULL'. Custom position of the camera. The 'FOV', 'width', and 'height' arguments will still be derived from the rgl window.
camera_lookat	Default 'NULL'. Custom point at which the camera is directed. The 'FOV', 'width', and 'height' arguments will still be derived from the rgl window.
background	Default 'NULL', defaults to device background. Background color when 'software_render = TRUE'.
text_angle	Default 'NULL', which forces the text always to face the camera. If a single angle (degrees), will specify the absolute angle all the labels are facing. If three angles, this will specify all three orientations (relative to the x,y, and z axes) of the text labels.
text_size	Default '30'. Height of the text.
text_offset	Default 'c(0,0,0)'. Offset to be applied to all text labels.
point_radius	Default '2'. Radius of 3D points (rendered with 'render_points()'.
line_offset	Default '1e-7'. Small number indicating the offset in the scene to apply to lines if using software rendering. Increase this if your lines aren't showing up, or decrease it if lines are appearing through solid objects.
thick_lines	Default 'TRUE'. If 'software_render = TRUE', this will render path segments as thick cylinders. Otherwise, it will render the lines using a single-pixel anti-aliased line algorithm.
line_radius	Default '0.5'. The radius of the thick cylinders if 'thick_lines = TRUE' and 'software_render = TRUE'.
cache_scene	Default 'FALSE'. Whether to cache the current scene to memory so it does not have to be converted to a 'raymesh' object each time 'render_snapshot()' is called. If 'TRUE' and a scene has been cached, it will be used when rendering.
reset_scene_cache	Default 'FALSE'. Resets the scene cache before rendering.
new_page	Default 'TRUE'. Whether to call 'grid::grid.newpage()' before plotting the image.
print_scene_info	Default 'FALSE'. If 'TRUE', it will print the position and lookat point of the camera.
fsaa	Default '1'. Integer specifying the amount of anti-aliasing applied 'software_render = TRUE'.
rayvertex_lighting	Default 'FALSE'. If 'TRUE' and 'software_render = TRUE', the scene will use rayvertex lighting when rendering the scene, using the lights specified in 'rayvertex_lights'. If no lights are specified there, they will be pulled from 'light' objects in the 'rgl' scene.
rayvertex_lights	Default 'NULL'. Use 'rayvertex::directional_light()' and 'rayvertex::point_light()' along with the 'rayvertex::add_light()' function to specify lighting for your scene when 'rayvertex_lighting = TRUE'.
rayvertex_shadow_map	Default 'FALSE'. If 'TRUE' and 'rayvertex_lighting = TRUE' along with 'software_render = TRUE', shadow mapping will also be applied to the rendered scene.
...	Additional parameters to pass to 'rayvertex::rasterize_scene()'.

Value

Displays snapshot of current rgl plot (or saves to disk).

Examples

if(run_documentation()) {
montereybay %>%
 sphere_shade() %>%
 plot_3d(montereybay,zscale=50,zoom=0.6,theta=-90,phi=30)
}
 
if(run_documentation()) {
render_snapshot()
}
 
#Create a title
if(run_documentation()) {
render_snapshot(title_text = "Monterey Bay, California", title_offset=c(0,20),
               title_color = "white", title_bar_color = "black",
               title_font = "Helvetica", title_position = "north")
               
#Add a vignette effect
render_camera(zoom=0.8)
render_snapshot(title_text = "Monterey Bay, California", 
               title_color = "white", title_bar_color = "darkgreen",
               vignette = TRUE, title_offset=c(0,20),
               title_font = "Helvetica", title_position = "north")
}
#Use software rendering to render a scene with shadow mapping
if(run_documentation()) {
montereybay |> 
 height_shade() |> 
 plot_3d(montereybay, shadow=FALSE, solidlinecolor = NULL)
#No shadows
render_snapshot(software_render = TRUE)
}
if(run_documentation()) {
#Now with shadow mapped shadows, calculated in rayvertex
render_snapshot(rayvertex_lighting = TRUE, 
               rayvertex_lights = rayvertex::directional_light(intensity = 1.2, 
                                                               direction = c(-1, 1, -1)), 
               rayvertex_shadow_map = TRUE, software_render = TRUE)
}

rayshader documentation built on May 29, 2024, 3:03 a.m.