This is the command r.out.povgrass that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
r.out.pov - Converts a raster map layer into a height-field file for POV-Ray.
KEYWORDS
raster, export
SYNOPSIS
r.out.pov
r.out.pov --help
r.out.pov input=name output=name [hftype=integer] [bias=float] [scale=float]
[--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
--overwrite
Allow output files to overwrite existing files
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog
Parameters:
input=name [required]
Name of input raster map
output=name [required]
Name of output povray file (TGA height field file)
hftype=integer
Height-field type (0=actual heights 1=normalized)
bias=float
Elevation bias
scale=float
Vertical scaling factor
DESCRIPTION
r.out.pov converts a user-specified raster map layer (map==name) into a height-field file
for POVray (tga==name). The hftype==value option (where value is either 0 or 1) specifies
the height-field type. When the user enters 0 the output will be actual heights. If
entered 1 the cell-values will be normalized. If hftype is 0 (actual heights) the
bias==value can be used to add or substract a value from heights. Use scale==value to
scale your heights by value. The GRASS program r.out.pov can be used to create height-
field files for Persistence of Vision (POV) raytracer. POV can use a height-field defined
in Targa (.TGA) image file format where the RGB pixel values are 24 bits (3 bytes). A 16
bit unsigned integer height-field value is assigned as follows: RED = high byte, GREEN =
low byte, BLUE = empty.
EXAMPLE
An example Povray script file may look like this:
#include "shapes.inc"
#include "colors.inc"
#include "textures.inc"
#declare Scale = 7;
light_source { <40000, Scale*3000, 5000> color MainLight }
camera {
location < 23000, Scale*2000, 0>
angle 90
look_at < 23000, Scale*1400, 5000>
}
height_field {
tga "dem.lr.tga"
smooth
water_level 0.11 // 726 / 6553.6 = 0.111
texture {
pigment {
image_map { // image is always projected from -z, with front facing +z, top to +Y
ppm "map.lr.ppm"
once
}
rotate x*90 // align map to height_field
}
}
finish {
ambient 0.2 // Very dark shadows
diffuse 0.8 // Whiten the whites
phong 0.2 // shiny
phong_size 100.0 // with tight highlights
specular 0.5
roughness 0.05
}
scale < 14500, Scale*6553.6, 13000 >
translate <18300, 0, 1100>
}
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