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Plot 3D map of elevation generated by an OCN

draw_elev3D_OCN.Rd

Function that plots the 3D elevation map generated by an OCN.

Usage

draw_elev3D_OCN(OCN, coarseGrain = c(1,1), colPalette = terrain.colors(1000, alpha = 1),
  addColorbar = TRUE, drawRiver = TRUE, thrADraw = 0.002 *
  OCN$FD$nNodes * OCN$cellsize^2, riverColor = "#00CCFF",
  theta = -20, phi = 30, expand = 0.05, shade = 0.5, min_lwd = 0.5, max_lwd = 5, 
  args_imagePlot = list())

Arguments

OCN

A river object as produced by landscape_OCN.

coarseGrain

2x1 vector (only effective if chooseCM = FALSE). For aesthetic purposes, the elevation map can be coarse-grained into a OCN$dimX/coarseGrain[1]-by-OCN$dimX/coarseGrain[2] domain, where each cell's elevation is the average of elevations of the corresponding coarseGrain[1]-by-coarseGrain[2] cells of the original elevation field. coarseGrain[1] and coarseGrain[2] must be divisors of OCN$dimX and OCN$dimY, respectively. coarseGrain = c(2,2) is often sufficient to achieve a good graphical results for large (i.e. at least 100x100 nodes) OCNs.

colPalette

Color palette used for the plot.

addColorbar

If TRUE, add colorbar to the plot.

drawRiver

If TRUE, draw the OCN on top of the elevation field.

thrADraw

Threshold drainage area value used to display the network.

riverColor

Color used to plot the river.

theta, phi, expand, shade

Additional parameters passed to the perspective plotting function persp. theta expresses azimuthal direction; phi gives colatitude; expand is the expansion factor for the Z coordinates; shade controls the shade at a surface facet.

min_lwd, max_lwd

Minimum and maximum values of line width used to display the OCN (actual line width is proportional to the square root of drainage area).

args_imagePlot

Only effective if addColorbar = TRUE. List of arguments passed to imagePlot for drawing a continuous legend. For example, argument smallplot can be used to specify the plot coordinates for the legend.

Value

No output is returned.

Examples

# draw 3D representation of a 20x20 OCN with default options
draw_elev3D_OCN(landscape_OCN(OCN_20))


if (FALSE) {
# 1a) draw the 3D representation of the OCN (without displaying the river  
# and the colorbar) and enhance the aspect ratio of Z coordinates 
# with respect to the default value (the final result will be ugly):
OCN <- landscape_OCN(OCN_400_Allout, displayUpdates = 2) # this takes some minutes  
draw_elev3D_OCN(OCN, expand = 0.2, addColorbar = FALSE, drawRiver = FALSE)

# 1b) same as above, but operate coarse graining  and modify shade for better aesthetics: 
draw_elev3D_OCN(OCN, coarseGrain = c(5,5), expand = 0.2, 
    shade = 0.25, addColorbar = FALSE, drawRiver = FALSE)
}