Takes the scene description and renders an image, either to the device or to a filename.

render_scene(scene, width = 400, height = 400, fov = 20,
samples = 100, ambient_light = FALSE, lookfrom = c(0, 1, 10),
lookat = c(0, 0, 0), camera_up = c(0, 1, 0), aperture = 0.1,
clamp_value = Inf, filename = NULL, backgroundhigh = "#80b4ff",
backgroundlow = "#ffffff", shutteropen = 0, shutterclose = 1,
focal_distance = NULL, ortho_dimensions = c(1, 1),
tonemap = "gamma", parallel = TRUE, environment_light = NULL,
rotate_env = 0, progress = interactive(), verbose = FALSE,
debug = NULL)

## Arguments

scene Tibble of object locations and properties. Default 400. Width of the render, in pixels. Default 400. Height of the render, in pixels. Default 20. Field of view, in degrees. If this is zero, the camera will use an orthographic projection. The size of the plane used to create the orthographic projection is given in argument ortho_dimensions. Default 100. Number of samples for each pixel. Default FALSE, unless there are no emitting objects in the scene. If TRUE, the background will be a gradient varying from backgroundhigh directly up (+y) to backgroundlow directly down (-y). Default c(0,1,10). Location of the camera. Default c(0,0,0). Location where the camera is pointed. Default c(0,1,0). Vector indicating the "up" position of the camera. Default 0.1. Aperture of the camera. Smaller numbers will increase depth of field, causing less blurring in areas not in focus. Default Inf. If a bright light or a reflective material is in the scene, occasionally there will be bright spots that will not go away even with a large number of samples. These can be removed (at the cost of slightly darkening the image) by setting this to a small number greater than 1. Default NULL. If present, the renderer will write to the filename instead of the current device. Default #80b4ff. The "high" color in the background gradient. Can be either a hexadecimal code, or a numeric rgb vector listing three intensities between 0 and 1. Default #ffffff. The "low" color in the background gradient. Can be either a hexadecimal code, or a numeric rgb vector listing three intensities between 0 and 1. Default 0. Time at which the shutter is open. Only affects moving objects. Default 1. Time at which the shutter is open. Only affects moving objects. Default NULL, automatically set to the lookfrom-lookat distance unless otherwise specified. Default c(1,1). Width and height of the orthographic camera. Will only be used if fov = 0. Default gamma. Choose the tone mapping function, Default gamma solely adjusts for gamma and clamps values greater than 1 to 1. reinhold scales values by their individual color channels color/(1+color) and then performs the gamma adjustment. uncharted uses the mapping developed for Uncharted 2 by John Hable. hbd uses an optimized formula by Jim Hejl and Richard Burgess-Dawson. Default FALSE. If TRUE, it will use all available cores to render the image (or the number specified in options("cores") if that option is not NULL). Default NULL. An image to be used for the background for rays that escape the scene. Supports both HDR (.hdr) and low-dynamic range (.png, .jpg) images. Default 0. The number of degrees to rotate the environment map around the scene. Default TRUE if interactive session, FALSE otherwise. Default FALSE. Prints information and timing information about scene construction and raytracing progress. Default NULL. If bvh, will return an image indicated the number of BVH lookups.

## Value

Raytraced plot to current device, or an image saved to a file.

## Examples

#Generate a large checkered sphere as the ground
scene = generate_ground(depth=-0.5, material = diffuse(color="white", checkercolor="darkgreen"))render_scene(scene,parallel=TRUE,samples=500)
#Add a sphere to the center
scene = scene %>%
scene = scene %>%
scene = scene %>%
#Lower the number of samples to render more quickly (here, we also use only one core).
render_scene(scene, samples=4)
#Add a floating R plot using the iris dataset as a png onto a floating 2D rectangle

tempfileplot = tempfile()
png(filename=tempfileplot,height=400,width=800)
plot(iris$Petal.Length,iris$Sepal.Width,col=iris\$Species,pch=18,cex=4)
dev.off()#> pdf
#>   2
scene = scene %>%
material = diffuse(image = image_array)))
render_scene(scene,fov=20,parallel=TRUE,samples=500)
#Move the camera
render_scene(scene,lookfrom = c(7,1.5,10),lookat = c(0,0.5,0),fov=15,parallel=TRUE)
#Change the background gradient to a night time ambiance
render_scene(scene,lookfrom = c(7,1.5,10),lookat = c(0,0.5,0),fov=15,
backgroundhigh = "#282375", backgroundlow = "#7e77ea", parallel=TRUE,
samples=500)
#Increase the aperture to blur objects that are further from the focal plane.
render_scene(scene,lookfrom = c(7,1.5,10),lookat = c(0,0.5,0),fov=15,
aperture = 0.5,parallel=TRUE,samples=500)
#Spin the camera around the scene, decreasing the number of samples to render faster. To make
#an animation, specify the a filename in render_scene for each frame and use the av package
#or ffmpeg to combine them all into a movie.

t=1:30
xpos = 10 * sin(t*12*pi/180+pi/2)
zpos = 10 * cos(t*12*pi/180+pi/2)#Save old par() settings
}