NAME
r.out.pov - Converts a raster map layer into a height-field file for POV-Ray.
KEYWORDS
raster,
export,
output
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
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 subtract 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.
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>
}
Klaus D. Meyer, GEUM.tec GbR, eMail:
GEUM.tec@geum.de
SOURCE CODE
Available at:
r.out.pov source code
(history)
Latest change: Tuesday Dec 17 20:17:20 2024 in commit: ab90c5e5a9b668894da360fa97ffd4a51a38931e
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GRASS Development Team,
GRASS GIS 8.5.0dev Reference Manual