 
Note: A new GRASS GIS stable version has been released: GRASS GIS 7.6, available here.
 Updated manual page: here
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
 
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
Last changed: $Date: 2016-06-30 15:17:58 -0700 (Thu, 30 Jun 2016) $
SOURCE CODE
Available at: r.out.pov source code (history)
Note: A new GRASS GIS stable version has been released: GRASS GIS 7.6, available here.
 Updated manual page: here
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GRASS GIS 7.2.4svn Reference Manual