plot_3d: 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,
  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.
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

Run this code

#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()
}

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