Photo-panoramic scene for the model-airplane flight simulator CCCRSIM
Author :
Joël Liénard joel.lienard@laposte.net
See procedure of installation and technical elements at the bottom of page
News:
may, 2013 : "Les Busards"
april, 2013 : "Mont Clocher"
nov, 2012 : improvement of models of
ground of the hidden parts (for more realistic wind)
on most of the scenes
may, 2012: special French cup F3F 2012 versions for "Col des Faïsses" and "Alpe de Valbonnais".
Prerequisites :
CRRCSIM version 09.11, preferably 0.9.12 (for "Brié" scenery, rather compiled with option WINDDATA3D=1 and lib CGAL)
download of the simulator
Installation :
- Download the zip file
- Transfer its contents (decompressed) in the sub-directory "scenery"
of the installation directory of CRRSIM (usually "C:\Program
Files\CRRCSim\scenery\" under Windows)
- The panoramas are available in several resolutions. The use of a
high resolution allows to obtain a better quality of image. The
inconvenience is a bigger request of the graphic processor. If this one
is not rather powerful, he can occur one stuttering of the image or, in
the worst, the display will not be made. It is thus advisable to try
several resolutions to find the best compromise.
- The choice of the resolution is made since the dialogue of
location selection, by "Select sky graphic" or "Select sky or
resolution". (With CRRCSim 0.9.12, this choice is memorized)
- Attention: the initialization of these scenes is a little bit slow. Be patient.
Technical elements :
The panorama is a complete panorama (360 ° x 180 °)
The assembly of photos (approximately 80) and the calculation of the
heights of the terrain were realized by means of several software
- For the manual definition of control points, the geometrical
transformations and the assembly : Hugin : http://hugin.sourceforge.net)
- For the enchainement of the tasks and the determination of the heights: software specifically developed.
- For the triangulation of the model of terrain : Triangle (http://www.cs.cmu.edu/~quake/triangle.htm).
The determination of the heights is made by stereoscopy from two panoramas taken at two different heights.
It is be completed by the use of map.
Detailed explanations (only in French)...
How is calculated the vertical component of wind?
CRRCSim uses a generator of updraft according to the relief. This
very rudimentary generator in version 0.9.11 was improved in 0.9.12.
For the slope of Brié, a precalculation of the values of the wind speed
and orientation was made. (http://jugiraud1.free.fr/brie.htm). At
present only in 2D, 3D in project. To use these values, it is necessary
to use CRRCSIM compiled with option WINDDATA3D=1 and library CGAL
Known problems:
- Brié: the altitudes are determined well only to short distance. Do
not try to to land too low!! It is the first realized scene, a new
version with the last technique is in preparation.
-
Sornin: it sometimes appears of false shadows. It is a problem of CRRCSIM.(fixed on 0.9.12)
In projects :
- Several points of view of the slope of Brié. In particular South side to be able to practise the DS (Dynamic Soaring).
- Other slope in the region or somewhere else...
