perm filename 4.5[0,BGB]1 blob
sn#078588 filedate 1974-02-14 generic text, type C, neo UTF8
COMMENT ā VALID 00011 PAGES
C REC PAGE DESCRIPTION
C00001 00001
C00003 00002 4.5 GEOMED Node Formats.
C00006 00003 2 U Universe
C00008 00004 4 C Camera
C00010 00005 6 D Window
C00012 00006 10 T Text
C00014 00007 12 Y Ynode (Currently general purpose node)
C00016 00008 14 B Body
C00018 00009 16 E Edge
C00021 00010 Type Bits (0-11)
C00026 00011 Type Bits 14-35
C00033 ENDMK
Cā;
4.5 GEOMED Node Formats.
---------------------------------------------------------------------
0 R Frame
----------------------------
-3 | xwc | X
-2 | ywc | Y World coordinates
-1 | zwc | Z
0 | ix | X
1 | iy | Y i Unit vector
2 | iz | Z
3 | jx | X
4 | jy | Y j Unit vector
5 | jz | Z
6 | kx | X
7 | ky | Y k Unit vector
8 | kz | Z
----------------------------
The frame node contains the location and orientation of an
entity with repect to world coordinates. The locus coordinates are in
centimeters. The world origin and orientation, of course, are defined
outside of GEOMED - for the cart project the world origin is at the
center of the laboratory building's circular arc 440 feet above sea
level, the Z axis is striaght up... For the hand/eye project the
origin is at the corner of the table nearest the golden arm, the Z
axis points up the X axis points towards the blue Sierra camera, the
Y axis points towards the blue arm.
---------------------------------------------------------------------
1 M Empty
----------------------------
-3 | 0 or ptr |
-2 | |
-1 | |
0 | type 1 |
1 | (Avail) |
2 | |
3 | |
4 | |
5 | |
6 | |
7 | |
8 | |
----------------------------
The list of empty nodes is maintained in the -3 cdr link.
The last empty node contains a zero address pointer. All the word
of the empty node besides -3 and 0 contain zero.
---------------------------------------------------------------------
2 U Universe
----------------------------
-3 | (Coresize) |
-2 | Avail |
-1 | Block Count |
0 | type 2 |
1 | (Avail) |
2 | | Contains base of free storage for I/O
3 | |
4 | son | World Ring
5 | |
6 | |
7 | |
8 | |
----------------------------
The universe node is unique; it is the first node in a GEOMED
address space. Immediately accessible from the universe node is the ring
of world, the empty node list, and the ring of displays.
---------------------------------------------------------------------
3 S SUN
----------------------------
-3 | |
-2 | |
-1 | |
0 | type 3 |
1 | |
2 | |
3 | |
4 | pwrld |
5 | bro (sun ring) sis |
6 | alt frame |
7 | 0 |
8 | |
----------------------------
The sun node represents a light source, however it is very much
like a camera.
---------------------------------------------------------------------
4 C Camera
----------------------------
-3 | scalex |
-2 | scaley |
-1 | scalez |
0 | type 4 |
1 | pdx ldx |
2 | pdy ldy | Physical and logical raster size
3 | focal ldz |
4 | DAD SON | DAD(camera)=universe
5 | BRO SIS | World ring
6 | FRAME | Camera frame of reference
7 | |
8 | |
----------------------------
---------------------------------------------------------------------
5 W World
----------------------------
-3 | |
-2 | pname1 |
-1 | pname2 |
0 | type 5 |
1 | PFACE | Potentially visible face list
2 | NED PED | Ends of potentionally visible edge list
3 | | After SHOW, PED is head of visible edge list
4 | DAD SON | DAD(world)=universe
5 | BRO SIS | World ring
6 | FRAME | World frame
7 | CW CCW | Body ring (all bodies in this world)
8 | |
----------------------------
6 D Window
----------------------------
-3 | sx sy | Source origin
-2 | ox oy | Object origin
-1 | mag | Magnification
0 | type 6 |
1 | XL XH | 2D Clipper window
2 | YL YH |
3 | |
4 | DAD SON | DAD(window)=universe
5 | BRO SIS | World ring
6 | ALT ALT2 | ALT(window)=camera, ALT2(window)=world or image
7 | |
8 | |
----------------------------
7 I Image
----------------------------
-3 | |
-2 | |
-1 | |
0 | type 7 |
1 | NFACE PFACE | Face ring
2 | NED PED | Edge ring
3 | NVT PVT | Vertex ring
4 | DAD SON | DAD(image)=universe
5 | BRO DAD | World ring
6 | |
7 | |
8 | |
----------------------------
10 T Text
----------------------------
-3 | --- |
-2 | --- |
-1 | TCW TCCW |
0 | type 10 |
1 | ASCIZ/Text goes here/ |
2 | |
3 | |
4 | |
5 | |
6 | |
7 | |
8 | |
----------------------------
If CONBIT is on, the line is continued in the next text node.
---------------------------------------------------------------------
11 X Xnode (User node)
(never touched by GEM)
----------------------------
-3 | |
-2 | |
-1 | |
0 | type 11 |
1 | |
2 | |
3 | |
4 | |
5 | |
6 | |
7 | |
8 | |
----------------------------
12 Y Ynode (Currently general purpose node)
(See Y-0 thru Y-1)
----------------------------
-3 | |
-2 | |
-1 | |
0 | type 12 |
1 | |
2 | PY NY |
3 | |
4 | |
5 | |
6 | |
7 | ytype reloc | Ytype in bits 0-5, reloc in 6-17,23-35
8 | CAR8 CDR8 |
----------------------------
At present Y-nodes are used to contain
arrowhead parameters and text headers.
---------------------------------------------------------------------
13 Z Znode (Data node)
(currently not used, reserved for NEWTON)
----------------------------
-3 | |
-2 | |
-1 | |
0 | type 13 |
1 | |
2 | |
3 | |
4 | |
5 | |
6 | |
7 | |
8 | |
----------------------------
14 B Body
----------------------------
-3 | |
-2 | pname1 |
-1 | pname2 |
0 | type 14 |
1 | NFACE PFACE | Face ring
2 | NED PED | Edge ring
3 | NVT PVT | Vertex ring
4 | DAD SON | Parts tree
5 | BRO SIS | Parts tree
6 | ALT FRAME | ALT temporary, FRAME is body frame of reference
7 | CW CCW | Body ring
8 | CAR8 CDR8 | Reserved for users
----------------------------
---------------------------------------------------------------------
15 F Face
----------------------------
-3 | AA | Face coefficients (Perspective coordinates)
-2 | BB |
-1 | CC | AA x + BB Y + CC Z = KK
0 | type 15 |
1 | NFACE PFACE | Face ring
2 | (NCNT) PED | PED: First Edge
3 | KK | [Face coefficient]
4 | (DAD) (SON) | (Nested polygon tree)
5 | (BRO) (SIS) |
6 | ALT POTEN | ALT temporary,,Potentially visible face list
7 | QQ | Photometric characteristics (4 9-bit bytes, CRBG)
8 | CAR8 CDR8 | Reserved for users
----------------------------
16 E Edge
----------------------------
-3 | x1dc AA y1dc | 2D Clipper: Edge display coordinates
-2 | x2dc BB x2dc | OCCULT: 2D Edge coefficients AA Xpp + BB Ypp + CC = 0
-1 | naf CC paf | Body Intersection: Temperaries
0 | type 16 |
1 | NFACE PFACE | Two Faces of the edge
2 | NED PED | Edge ring
3 | NVT PVT | Two vertices of the edge
4 | NCW PCW | Wings: Negative and positive clockwise
5 | NCCW PCCW | Wings: Negative and postive counter-clockwise
6 | ALT ALT2 | Temperaries, ALT2 is visible edge list
7 | UFACE PBODY | [OCCULT, BIN] Under[Over]face
8 | CAR8 CDR8 | Reserved for users
----------------------------
---------------------------------------------------------------------
17 V Vertex
----------------------------
-3 | Xwc | X
-2 | Ywc | Y World coordinates
-1 | Zwc | Z
0 | type 17 |
1 | xdc ydc | Display coordinates (currently REAL)
2 | TJOINT/PY PED | OCCULT: TJOINT, GEOMED: PY,,First edge
3 | NVT PVT | Vertex ring
4 | Xpp | X
5 | Ypp | Y Perspective projected
6 | ALT Zpp ALT2 | Z or temperary
7 | CAR7 CDR7 | Temperary
8 | CAR8 CDR8 | Reserved for users
----------------------------
Type Bits (0-11)
___________________________________________________________________
| | | | | | |
| | BODY | FACE | EDGE | VERTEX | COMMENTS |
|__|________|________|________|________|____________________________|
| | | | | | Must be zero to destingish |
| 0| 0 | 0 | 0 | 0 | frame nodes. |
|__|________|________|________|________|____________________________|
| | | | | | BDL Body Disable Frame |
| 1|(BDLBIT)| PZZ | PZZ | PZZ | PZZ Pos. Zpp(behind camera)|
|__|________|________|________|________|____________________________|
| | | | | | |
| 2| TMPBIT | TMPBIT | TMPBIT | TMPBIT | Temperary structure |
|__|________|________|________|________|____________________________|
| | | | | | BDV Body Disable Vertices |
| 3|(BDVBIT)| | DARKEN | JUTBIT | JUT Joint under TJOINT |
|__|________|________|________|________|____________________________|
| | | | | | BDP Body Disable Parts, |
| 4|(BDPBIT)| | SHARP | JOTBIT | JOT Joint over TJOINT |
|__|________|________|________|________|____________________________|
| | | | | | WASP(see EEGLUE, EULER.FAI)|
| 5| | | WASP | NORTH | NORTH - Above window |
|__|________|________|________|________|____________________________|
| | | | | | |
| 6| | | | SOUTH | SOUTH - Below window |
|__|________|________|________|________|____________________________|
| | | | | | |
| 7| | | | EAST | EAST - Right of window |
|__|________|________|________|________|____________________________|
| | | | | | |
| 8| | | | WEST | WEST - Left of window |
|__|________|________|________|________|____________________________|
| | | | | | Must be zero to destingish |
| 9| 0 | 0 | 0 | 0 | frame nodes. |
|__|________|________|________|________|____________________________|
| | | | | | |
|10| | NZZ | NZZ | NZZ | NZZ Neg. Zpp(before camera)|
|__|________|________|________|________|____________________________|
| | | | | | |
|11| | | FOLDED | | |
|__|________|________|________|________|____________________________|
| | | | | | [OCCULT] |
|12| VISIBLE| VISIBLE| VISIBLE| VISIBLE| Really visible |
|__|________|________|________|________|____________________________|
| | | | | | [OCCULT] |
|13| POTENT | POTENT | POTENT | POTENT | Potentially visible |
|__|________|________|________|________|____________________________|
Type Bits 14-35
___________________________________________________________________
| | | | | | |
| | BODY | FACE | EDGE | VERTEX | COMMENTS |
|__|________|________|________|________|____________________________|
| | | | | | |
|14| 0 | 0 | 0 | VBIT | This is a VERTEX |
|15| 0 | 0 | EBIT | 0 | This is a EDGE |
|16| 0 | FBIT | 0 | 0 | This is a FACE |
|17| BBIT | 0 | 0 | 0 | This is a BODY
|__|________|________|________|________|____________________________|
| | | | | | |
|18| TBIT1 | TBIT1 | TBIT1 | TBIT1 | |
|191 TBIT2 | TBIT2 | TBIT2 | TBIT2 | GEM general purpose temp. |
|20| TBIT3 | TBIT3 | TBIT3 | TBIT3 | |
|__|________|________|________|________|____________________________|
| | | | | | |
|21| UBIT1 | UBIT1 | UBIT1 | UBIT1 | |
|221 UBIT2 | UBIT2 | UBIT2 | UBIT2 | User general purpose bits |
|23| UBIT3 | UBIT3 | UBIT3 | UBIT3 | |
|__|________|________|________|________|____________________________|
| | | | | | |
|24| | | | | |
|25| | | | | |
|26| | | | | Reserved for GEM |
|27| | | | | |
|28| | | | | |
|29| | | | | |
|__|________|________|________|________|____________________________|
| | | | | | |
|30| PBIT | (PBIT) | 0 | 0 | May be in a parts tree |
|__|________|________|________|________|____________________________|
| | | | | | |
|31| GCBIT | GCBIT | GCBIT | GCBIT | Garbage collector's mark |
|__|________|________|________|________|____________________________|
| | | | | | |
|32| 1 | 1 | 1 | 1 | T |
|33| 1 | 1 | 1 | 1 | Y |
|34| 0 | 0 | 1 | 1 | P |
|35| 0 | 1 | 0 | 1 | E |
|__|________|________|________|________|____________________________|