I will try to explain the meaning of each number. Your English is perfect for me because I am a Hungarian.
There is not too much to do with FMSXYZ in your case. It is displaying the "ground" of normal 3D landscapes where the pictures are attributes of QUDRANT command, and the position of objects which are denoted by, AIRCRAFT, PILOT, and POSITION commands.
If you open your .scn file using FMSXYZ you will see the Pilot and Aircraft symbols.
If you open my Telki you will see a lot of red circles pointing to the “Crash†objects.
AIRCRAFT_POSITION 3 0 0 0
PILOT_POSITION 0 0 1.7 FIXED
The first two numbers are x, y coordinates the third is the height position of aircraft, pilot and the camera. In this example the aircraft if loaded will stand at the x=3 y=0 position the pilot is at the center. The 1.7 (be careful always “.†should be used as decimal point.) the camera position at the head of the pilot.
FIXED is a very important command. If used the camera remain fixed, the “View†can not be “chaseâ€. In my test Landscapes FIXED is deleted, but normally “chase†can not be used if the .scn file is similar to yours.
In your case the QUADS command is used.
QUADS
-1000 -1000 30
-1000 1000 -30
1000 1000 -30
1000 -1000 30
This is a transparent “virtual†ground sheet. The shadow of the flying or taxiing model is visible on this sheet.
It should be transparent because the mapping (explained) later is projecting the lower part of your pictures below this sheet. The bottom picture and the lower parts of the four side picture can be seen through his transparent sheet.
If this is missing the loaded aircraft will fall down to the “bottom. It is a 2000m*2000m square. It is tilted. This was necessary for the designer of your sample Landscape. If the horizon of your pictures is properly set the height values should be 0. It is possible to tilt, push up or down the sheet as needed. The example above is tilted with 30m’s at the borders, but at the aircraft position the height is “0â€.
Pushing up, for instance deleting the “-‘ sign before the 30numbers is possible but the aircraft and pilot must be higher than this sheet. If pushed up with 30 the third number of pilot position should be 31.7.
3D_LANDSCAPE 3d , This command can be deleted in your case. If 3D landscape were created this should refer to a picture name which is the Gray coded height picture.
LIGHTNING OFF . I don’t know exactly, it should be “on†(this is the default setting) if COLOR command is used to define the color of various objects. If it is “OFF†the objects are white.
TEXTURE droite
254.75 254.75 -1024 -1024 -1024
254.75 0.25 -1024 -1024 1024
0.25 0.25 1024 -1024 1024
0.25 254.75 1024 -1024 -1024
TEXTURE command refers to a BMP picture. The size of the pictures must be binary, I don’t know the limits. I have tested pictures with the size of 512*512 and works.
This is the mapping command. FMS accepts only squares, which means four line command should be used.
If triangle is needed like at Telki sky pictures mapping, the triangles which are near the zenith in fact squares where the coordinate values are the same accordingly. (This mapping have been designed by TreeHugger.)
This SKYBOX mapping is the simplest one.
The points on the picture (droite) should be mapped to a point in the virtual space of the FMS landscape.
The first two numbers are the so called U, V coordinates. In the first line U=254.75 , V= 254.75 is a corner point of the picture, this point (PIXEL) should be positioned to the lower left and back corner of a cube (BOX) . The U,V coordinates are between 0 and 255.
The 0.25 correction is needed to overcome the fitting problem of the pictures. If it is not applied white stripes are visible.
The SKYBOX mapping is the simplest because the four corner points of the picture are enough to be defined, and those are mapped to the corner points of a virtual cube with the size of 2048 m.
The positioning of points (pixels) in between are computed by FMS and the graphic processor.
The pictures should be Rectiliear panorama pictures.
You should know that the order of the four lines is very important (this is the case with QUADS as well) If it is clock wise or counter clock wise (1,2,3,4 > 4, 3, 2, 1) is defining if the front or back side of the square is visible.
To create panorama landscape using FMSXYZ for the time being is not possible or recommended.
I have made one using FMS_PL and FMSXYZ one after other, but it is not easy. First of all for distortion free mapping Cylindrical panorama photo is needed.
The sky picture is not fitting. I have posted something about this under “FMS_PL and FMSXYZ†you can see the problems there. The result can be downloaded.