ray_shade2: Vectorized Base R Versions of 'rayshader::ray_shade'

In brodieG/shadow: Experimental R-only Implementation of Rayshader

Description

This is derived from the Wolf Vollprecht's adaptation of the original pure R implementation from Tyler Morgan Wall's blog post.

Usage

ray_shade2(heightmap, anglebreaks = seq(40, 50, 1), sunangle = 315,
  maxsearch = 100)

ray_shade3(heightmap, anglebreaks = seq(40, 50, 1), sunangle = 315,
  maxsearch = 100)

Arguments

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.
anglebreaks	Default 'seq(40,50,1)'. The azimuth angle(s), in degrees, as measured from the horizon from which the light originates.
sunangle	Default '315' (NW). The angle, in degrees, around the matrix from which the light originates. Zero degrees is North, increasing clockwise.
maxsearch	Default '100'. The maximum distance that the system should propogate rays to check. For longer

Details

• ray_shade2: vectorized version with bilinear height interpolation

• ray_shade3: vectorized version with closest point height approx

Value

numeric matrix of shadow intensities between with values in &91;0,1&93;.

brodieG/shadow documentation built on Aug. 12, 2019, 1:50 p.m.