plot_3d: Plot 3D

View source: R/plot_3d.R

plot_3dR Documentation

Plot 3D

Description

Displays the shaded map in 3D with the 'rgl' package.

Note: Calling 'plot_3d()' resets the scene cache for the 'render_snapshot()', 'render_depth()', and 'render_highquality()'

Usage

plot_3d(
  hillshade,
  heightmap,
  zscale = 1,
  baseshape = "rectangle",
  solid = TRUE,
  soliddepth = "auto",
  solidcolor = "grey20",
  solidlinecolor = "grey30",
  shadow = TRUE,
  shadowdepth = "auto",
  shadowcolor = "auto",
  shadow_darkness = 0.5,
  shadowwidth = "auto",
  water = FALSE,
  waterdepth = 0,
  watercolor = "dodgerblue",
  wateralpha = 0.5,
  waterlinecolor = NULL,
  waterlinealpha = 1,
  linewidth = 2,
  lineantialias = FALSE,
  soil = FALSE,
  soil_freq = 0.1,
  soil_levels = 16,
  soil_color_light = "#b39474",
  soil_color_dark = "#8a623b",
  soil_gradient = 2,
  soil_gradient_darken = 4,
  theta = 45,
  phi = 45,
  fov = 0,
  zoom = 1,
  background = "white",
  windowsize = 600,
  precomputed_normals = NULL,
  asp = 1,
  triangulate = FALSE,
  max_error = 0,
  max_tri = 0,
  verbose = FALSE,
  plot_new = TRUE,
  close_previous = TRUE,
  clear_previous = TRUE
)

Arguments

hillshade

Hillshade/image to be added to 3D surface map.

heightmap

A two-dimensional matrix, where each entry in the matrix is the elevation at that point. All points are assumed to be evenly spaced.

zscale

Default '1'. The ratio between the x and y spacing (which are assumed to be equal) and the z axis. For example, if the elevation levels are in units of 1 meter and the grid values are separated by 10 meters, 'zscale' would be 10. Adjust the zscale down to exaggerate elevation features.

baseshape

Default 'rectangle'. Shape of the base. Options are 'c("rectangle","circle","hex")'.

solid

Default 'TRUE'. If 'FALSE', just the surface is rendered.

soliddepth

Default 'auto', which sets it to the lowest elevation in the matrix minus one unit (scaled by zscale). Depth of the solid base. If heightmap is uniform and set on 'auto', this is automatically set to a slightly lower level than the uniform elevation.

solidcolor

Default 'grey20'. Base color.

solidlinecolor

Default 'grey30'. Base edge line color.

shadow

Default 'TRUE'. If 'FALSE', no shadow is rendered.

shadowdepth

Default 'auto', which sets it to 'soliddepth - soliddepth/10'. Depth of the shadow layer.

shadowcolor

Default 'auto'. Color of the shadow, automatically computed as 'shadow_darkness' the luminance of the 'background' color in the CIELuv colorspace if not specified.

shadow_darkness

Default '0.5'. Darkness of the shadow, if 'shadowcolor = "auto"'.

shadowwidth

Default 'auto', which sizes it to 1/10th the smallest dimension of 'heightmap'. Width of the shadow in units of the matrix.

water

Default 'FALSE'. If 'TRUE', a water layer is rendered.

waterdepth

Default '0'. Water level.

watercolor

Default 'lightblue'. Color of the water.

wateralpha

Default '0.5'. Water transparency.

waterlinecolor

Default 'NULL'. Color of the lines around the edges of the water layer.

waterlinealpha

Default '1'. Water line tranparency.

linewidth

Default '2'. Width of the edge lines in the scene.

lineantialias

Default 'FALSE'. Whether to anti-alias the lines in the scene.

soil

Default 'FALSE'. Whether to draw the solid base with a textured soil layer.

soil_freq

Default '0.1'. Frequency of soil clumps. Higher frequency values give smaller soil clumps.

soil_levels

Default '16'. Fractal level of the soil.

soil_color_light

Default '"#b39474"'. Light tint of soil.

soil_color_dark

Default '"#8a623b"'. Dark tint of soil.

soil_gradient

Default '2'. Sharpness of the soil darkening gradient. '0' turns off the gradient entirely.

soil_gradient_darken

Default '4'. Amount to darken the 'soil_color_dark' value for the deepest soil layers. Higher numbers increase the darkening effect.

theta

Default '45'. Rotation around z-axis.

phi

Default '45'. Azimuth angle.

fov

Default '0'–isometric. Field-of-view angle.

zoom

Default '1'. Zoom factor.

background

Default 'grey10'. Color of the background.

windowsize

Default '600'. Position, width, and height of the 'rgl' device displaying the plot. If a single number, viewport will be a square and located in upper left corner. If two numbers, (e.g. 'c(600,800)'), user will specify width and height separately. If four numbers (e.g. 'c(200,0,600,800)'), the first two coordinates specify the location of the x-y coordinates of the bottom-left corner of the viewport on the screen, and the next two (or one, if square) specify the window size. NOTE: The absolute positioning of the window does not currently work on macOS (tested on Mojave), but the size can still be specified.

precomputed_normals

Default 'NULL'. Takes the output of 'calculate_normals()' to save computing normals internally.

asp

Default '1'. Aspect ratio of the resulting plot. Use 'asp = 1/cospi(mean_latitude/180)' to rescale lat/long at higher latitudes to the correct the aspect ratio.

triangulate

Default 'FALSE'. Reduce the size of the 3D model by triangulating the height map. Set this to 'TRUE' if generating the model is slow, or moving it is choppy. Will also reduce the size of 3D models saved to disk.

max_error

Default '0.001'. Maximum allowable error when triangulating the height map, when 'triangulate = TRUE'. Increase this if you encounter problems with 3D performance, want to decrease render time with 'render_highquality()', or need to save a smaller 3D OBJ file to disk with 'save_obj()',

max_tri

Default '0', which turns this setting off and uses 'max_error'. Maximum number of triangles allowed with triangulating the height map, when 'triangulate = TRUE'. Increase this if you encounter problems with 3D performance, want to decrease render time with 'render_highquality()', or need to save a smaller 3D OBJ file to disk with 'save_obj()',

verbose

Default 'TRUE', if 'interactive()'. Prints information about the mesh triangulation if 'triangulate = TRUE'.

plot_new

Default 'TRUE', opens new window with each 'plot_3d()' call. If 'FALSE', the data will be plotted in the same window.

close_previous

Default 'TRUE'. Closes any previously open 'rgl' window. If 'FALSE', old windows will be kept open.

clear_previous

Default 'TRUE'. Clears the previously open 'rgl' window if 'plot_new = FALSE'.

Examples

#Plotting a spherical texture map of the built-in `montereybay` dataset.
if(run_documentation()) {
montereybay %>%
 sphere_shade(texture="desert") %>%
 plot_3d(montereybay,zscale=50)
render_snapshot()
}

#With a water layer  
if(run_documentation()) {
montereybay %>%
 sphere_shade(texture="imhof2") %>%
 plot_3d(montereybay, zscale=50, water = TRUE, watercolor="imhof2", 
         waterlinecolor="white", waterlinealpha=0.5)
render_snapshot()
}

#With a soil texture to the base  
if(run_documentation()) {
montereybay %>%
 sphere_shade(texture="imhof3") %>%
 plot_3d(montereybay, zscale=50, water = TRUE,  watercolor="imhof4", 
         waterlinecolor="white", waterlinealpha=0.5, soil=TRUE)
render_camera(theta=225, phi=7, zoom=0.5, fov=67)
render_snapshot()
}

#We can also change the base by setting "baseshape" to "hex" or "circle"
if(run_documentation()) {
montereybay %>%
 sphere_shade(texture="imhof1") %>%
 plot_3d(montereybay, zscale=50, water = TRUE, watercolor="imhof1", theta=-45, zoom=0.7,
         waterlinecolor="white", waterlinealpha=0.5,baseshape="circle")
render_snapshot()
}

if(run_documentation()) {
montereybay %>%
 sphere_shade(texture="imhof1") %>%
 plot_3d(montereybay, zscale=50, water = TRUE, watercolor="imhof1", theta=-45, zoom=0.7,
         waterlinecolor="white", waterlinealpha=0.5,baseshape="hex")
render_snapshot()
}



#Or we can carve out the region of interest ourselves, by setting those entries to NA
#to the elevation map passed into `plot_3d`

#Here, we only include the deep bathymetry data by setting all points greater than -10
#in the copied elevation matrix to NA.

mb_water = montereybay
mb_water[mb_water > -10] = NA

if(run_documentation()) {
montereybay %>%
 sphere_shade(texture="imhof1") %>%
 plot_3d(mb_water, zscale=50, water = TRUE, watercolor="imhof1", theta=-45,
         waterlinecolor="white", waterlinealpha=0.5)
render_snapshot()
}

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

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