kolibrios-fun/programs/demos/view3ds

View3ds 0.077 - tiny viewer to .3ds and .asc files with several graphics
                effects implementation.

Whats new?
1. More divs elimination comparing to ver 0.076, - grd_cat.inc file.
2. Some 3ds object I have, reads with invalid normals - fixed.
3. Invalid submit edition bug - fixed. Smaller size of adjcent proc.
4. Edges detection fix.


Buttons description:
1.  rotary: choosing rotary axle: x, y, x+y, keys - for object custom rotate
    using keyboard - keys <, >, PgUp, PgDown.
2.  shd. model: choosing shading model: flat, grd (smooth), env (spherical
    environment mapping, bump (bump mapping), tex (texture mapping),
    pos (position shading depend), dots (app draws only points - nodes of object),
    txgrd (texture mapping + smooth shading),  2tex (texture mapping + spherical
    environment mapping), bmap (bump + texture mapping),  cenv (cubic environment
    mapping), grdl (Gouraud lines - edges only), rphg (real Phong), glas (glass effect),
    ptex (real Phong + texturing + transparency).
3.  speed: idle, full.
4,5. zoom in, out: no comment.
6.  ray shadow: calc ray casted shadows.
7.  culling: backface culling on/ off.
8.  rand. light: Randomize 3 unlinear lights( so called Phong's illumination).
9.  blur: blur N times; N=0,1,2,3,4,5
10.11,12,13. loseless operations (rotary 90, 180 degrees).
12. emboss: Do emboss effect( flat bumps ), use 'bumps deep' button to do edges
     more deep.
13. fire: do motion blur ( looks like fire ).
14. move: changes meaning x,y,z +/- buttons  ->  obj: moving object, camr: moving
      camera, wave: x,y +/- increase, decrease wave effect frequency and amplitude.
15. generate: Generates some objects: node, Thorn Crown, heart...
16. bumps: random, according to texture.
17. bumps deep -> create bumps deeper or lighter.
18. re-map tex -> re-map texture and bump map coordinates, to change spherical
     mapping  around axle use 'xchg' and 'mirror' buttons, then press 're-map tex' button.
19. bright + -> increase picture brightness.
20. bright - -> decrease picture brightness.
21. wav effect -> do effect based sine function.
22. editor -> setting editing option. If is "on" then red bars are draw according to each
    vertex, Pressing  and moving left mouse button (cursor must be on handler)- change
    vertex position. If left mouse button is released apply current position. You may also
    decrease whole handlers count by enable culling (using appropriate button) - some
    back handlers become hidden.

                         Maciej Guba   march 2022