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Reference original document date : Jan. 31, 2010. This document is translated the original Japanese document Mr. Honda made.
About Photo Scenery Editor SimScence.exe for FMS, RSPSim
Function
It outputs the scene file (.scn) for FMS.
It outputs the image file for FMS or other flight simulator from the equirectangular projection image file which is made by Hugin or other software.
It can outputs the scene file (xscn, X file type) for RCPsim which is developed by V-Tails too. Here is RCPsim page. http://www.ac.cyberhome.ne.jp/~v-tails/delphi/rcpsim.html
Usage of SimScene.exe - Projection tab
Image file name
Set the equirectanglar image file name which is made by Hugin or other software.
When the equirectanglar image file is created, the width (pixel) of the image should be multiples of 8. If it isn't multiples of 8, SimScene.exe takes long time for changing it's size.
This file isn't needed to create or edit the scene file only.
Scene file name
Set the scene file name for making.
If there already has been the scene file, parameter are read from existing scene file.
SimScene.exe writes parameter as comment header in the scene file. If comment header exists, it is used. If comment header dosen't exist, the data other than space and angle of scene is read.
It can't read the parameter from following scene file. If it is read, error is displayed and clear parameter.
Scene file with 3D_LANDSCAPE section
TEXTURE section file image name aren't _left, _front, ... format.
TEXTURE section file image name aren't _0, _1, ... format.
TEXTURE section file image name aren't _11, _12, ... format.
Please backup the existing .scn file before it is read.
SimScene.exe read the parameter which is needed itself only, therefore it ignores collision polygon data. Collision polygon is set after crating scene file, if it's needed.
* Divided images from panorama image are output into this folder.
Base name of output images
Set base name of divided file. (ex. :"takikawa" of "takikawa_left.bmp" ).
Scene type
Set Cube (6 faces) or Sphere (20 faces).
Naming method
Set identifier after base name for cube (6 faces) type.
ex. _left.._bottom, _0.._5
FMS, RCPSim
Set for FMS or RCPsim.
X, Y, Z direction picture is shown, because FMS and RCPSim are different each other.
fms_X?@=?@xfile_X * -1
fms_Y?@=?@xfile_Z?@* -1
fms_Z?@=?@xfile_Y
These are relational expression.
Following explanation are based on FMS. If you use RCPSim, set transferred axis and direction by above method for RCPSim (X file tye).
Space (Radius of sphere)
Initial value is 1000. Set all space of photo scenery by radius of sphere.
Angle of scene
Initial value is 0. It is changed when takeoff direction isn't fit with photo scenery.
Plus value rotate photo scenery in a clockwise direction. (ex.: 25.3) Rotation function moves polygons which is mapped with image, therefore scenery rotates but takeoff position dosen't rotate.
Ground angle X
Initial value is 0. Set X axis angle of ground. Plus value raises up area of takeoff direction (area of plus Y). Minus value is oppositional angle.
Ground angle Y
Initial value is 0. Set Y axis angle of ground. Plus value raises up left area of takeoff direction (area of minus X). Minus value is oppositional angle.
In case of RCPSim, set ground angle Z. Rising up area is same by plus value, but RCPSim version 0.24 doesn't support ground angle, therefore output scene file doesn't apply ground angle.
Pilot position
Initial value is 0. Initial value which is origin of scene = camera position of panorama picture is recommended. By changing relation with Pilot position Z, you can feel like Choi Hong Man or on a stepladder, but 0 is recommended.
Aircraft position X
Initial value is -5. If this value is increased for minus direction, aircraft position becomes far from pilot. If this value is plus, aircraft position is behind pilot position. If scene angle is 180 and this value is plus, takeoff direction is reverse.
Aircraft position Y
Initial value is 0. When aircraft position X is minus, plus aircraft position Y moves aircraft right. Minus aircraft position Y moves aircraft left. When aircraft position X is plus, results opposite direction.
Aircraft position Z
Initial value is -1.7. Set height of aircraft position from camera position = origin of scene. If aircraft size on the ground is bigger than scenery, this value is set in minus. (ex.: -2.3) Eextreme value result collapse of scnery. Especially cube (6 faces) type has small margin. Feeling is change by Pilot position too.
Return reading value button
It can use when the scene file was read and the parameter could be gotten. Click to return data to reading value when reading scene file.
Initialize button
Set initial value to "Space (Radius of Sphere)","Angle of scene","Pilot position","Aircraft position X Y Z","Ground angle X Y".
Output divided images checkbox
When this is checked, divided images which are created from panorama image which is set in Image file name is output to folder which is set in Scene file name.
Output file names are the name which is set in base name of output + following text.
When Sphere (20 Face) is selected in type.
_11, _12, _13, _14, _21, _22, _23, _24, _25, _26, _27, _28, _31, _32, _33, _34, _35, _36, _37, _38
When cube (6 face) is selected in type, it names following by naming method.
_left, _front, _right, _back, _top, _bottom
_3, _0, _1, _2, _4, _5
When cube (6 face) is selected in type, it takes long time for converting to flat images from equirectangular projection image.
Error is appeared in case of following.
Image file name isn't set.
Image file doesn't exist.
Scene file name isn't set.
Folder which is set in scene file name doesn't exist.
Base name of output isn't set.
Output image size
When sphere (20 face) is selected in type, 512, 1024, 2048 can be selected.
When cube (6 face) is selected in type, 1024, 2048, 4096 can be selected.
When you select 4096, 16,384 * 8,192 pixels or more size of panorama image is recommended.
Output image type
Select Bitmap or Jpeg.
Output scene file
When this is checked, the scene file which is set in scene file name is output.
Error is appeared in case of following.
Scene file name isn't set.
Folder which is set in scene file name doesn't exist.
Base name of output isn't set.
Execute output button
Execute process by output divided image checkbox, output scene file checkbox.
While processing, console tab is activated and it shows process.
When process finishes, the page of project tab is activated.
If process is to output scene file only, process is very short.
Usage SimScene.exe - Image tab
State of displaying image and guide for cube (6 faces)
State of displaying image and guide for sphere (20 faces)
Show image
When image file name is set in project tab and this checkbox is checked, image file is read. It takes long time in case of large image.
When image file name is set and this checkbox is checked and image file exists, image file is read as above.
When clicking Execute output button in project tab, image is clear in this tab for saving memory. If you want to see image again, you clear this checkbox and check again.
Shoe guide
When this is checked, guide line for dividing image is displayed.
Displayed guide line is changed by type.
Guide line for sphere (20 faces) means not to use 1/4 bottom of image.
Type
Select cube (6 face) or sphere (20 face).
This is linked with project tab.
Width
Display image to fit width of page. When image is read at first time, this mode is applyed.
Height
Display image to fit height of page.
100%
Display image in 100% size.
Guide follows image
If display mode is changed or page is resized, guide follows image.
About photo scenery type (cube and sphere)
Cube (6 faces) type
Sphere (20 faces) type
Sphere type (20 faces)
Photo scenery of FMS supports 2 type of image; sphere and cube.
Sphere type consists of 384 faces polygon. 128 faces placed on each sky, upper, lower part which are shows right side of above picture.
4 images are mapped on sky portion, 8 images are mapped on each upper and lower portion.
Mapping image can be cut out simply from equirectangular projection image.
UV value of FMS are set 0 - 255,
// u v x y z
0 0 -707 -0 682
255 255 -707 707 -25
Using from edge to edge of image as above example, seam is appear.
// u v x y z
0.50 0.75 -707 -0 682
254.50 254.25 -707 707 -25
Therefore it is good to use inside in 1 pixel from edge of image.
But when above way is applied on simply cutting out image, continuity in a juncture is lost. Therefore overlap should be made when cutting out image.
This work is very hard manually with PhotoShop or other image software.
And conversion of coordinate for rotating scene can't be proceed manually because polygon has 384 faces. Trigger of developing SimScene.exe was to automate these process.
Cube (6 faces)
It seems that cube type represented by Schneeszenerie.scn is mainstream now. Polygon number is few 6 (actually 7 including ground), and mapping is easy because faces correspond with images one by one. It is same with sphere type that UV Value should applied inside value from edge of image, but continuity in a juncture isn't lost because each faces are perpendicular.
But images cutting out from equirectangular projection image simply can't be used.
When mapping directly, the area around vertex of cube is shown small because it's far from origin, and you feel to flight in the box. And barreled deformation curve is shown.
Therefore to transfer coordinate to cube from sphere is needed. This transfer can be do by Pano2QTVR, but also SimScene.exe. Transferring time of Scene.exe is a little faster than Pano2QTVR. (It's self-praise, and taking most long-term in this developing.) Transferring logic will be write in other chance.
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Original Japanese document © 2009-2010 katsuhiko honda. all rights reserved.
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