TopWare 18: Liquid/Image.iso/liquid/top1026/flash.exe/LESSN010.MSG

Text File | 1993-08-31 | 15.6 KB | 372 lines

************ CREATING AND MODIFYING 3D OBJECTS *************

THIS TUTORIAL EXPLAINS THE PROCESS OF CREATING AND MODIFYING
3D OBJECTS THROUGH USE OF FUNCTIONS:
             3D BLOCKS (CONSTRUCTION AREA)
             3D EDITING (GROUPS AREA)
<end>
AS LEARNED IN TUTORIAL 009 FIRST LET US CREATE A VIEW POINT.
SET HEIGHT TO 1.5 METERS AND THE ANGLE TO ZERO.
<end>
THE EASIEST WAY TO CREATE 3D MODELS IS TO CREATE A PLAN AT
GROUND ZERO THEN ASSIGN TO IT A THICKNESS (OR DEPTH).
LET US DRAW AN OUTLINE OF A WOULD BE PLAN THEN SELECT THE
FUNCTION "3D BLOCKS" TO ASSIGN THE 3D ATTRIBUTES.
<end>
NOTICE THE INFORMATION ON THE DATA LINE ABOVE.  THE ZAXIS
IS ZERO (GROUND LEVEL) AND THE HEIGHT (THICKNESS OF OBJECTS)
IS 2.5 METERS.  THIS THICKNESS IS AN EXTRUSION AS SELECTED
BELOW WITH OPTION "EXTRU".  LET US DRAW A WINDOW AROUND THE
YELLOW OUTLINE & CREATE THE MODEL WITH THESE SPECIFICATIONS.
<end>
NOW PRESS "F2" TO SEE THE MODEL FORM THE CURRENT POSITION OF
THE VIEW POINT AS DRAWN EARLIER. TO CHANGE THE PERSPECTIVE
VIEW BACK TO THE PLAN VIEW PRESS "6".
<end>
NOW LET US MOVE THE OBSERVER OR THE VIEW POINT USING GROUPS
AREA'S SINGLE MOVE. THEN CREATE A PERSPECTIVE WITH "F2".
<end>
THE PERSPECTIVES THAT WE HAVE LOOK AT SO FAR ARE CALLED:
WIRE FRAME PERSPECTIVES. TO OBTAIN A PERSPECTIVE WITH ITS
HIDDEN LINES REMOVED (A SOLID LOOK) PRESS ALT F2.
<end>
LET US CHANGE SOME OF THE PARAMETERS OF THIS SIMPLE MODEL
USING THE FUNCTION "3D EDITING" IN THE GROUPS AREA.
<end>
NOTICE THAT THE SUBMENU IS IDENTICAL TO THAT OF "3D BLOCKS"
IN THE CONSTRUCTION AREA.  NOW TO CHANGE A MODEL'S 3D
ATTRIBUTES FIRST IDENTIFY THE MODEL. (THERE CAN BE 100S OF
MODELS ON THE SCREEN).
<end>
THE SELECTED MODEL HAS BEEN IDENTIFIED IN WHITE.  NOTICE TWO
DIRECTIONAL ARROW AT THE ORIGIN (IN THIS CASE THE CENTER) OF
THE OBJECT.  THE ORIGIN MARKER IS VERY IMPORTANT LATER WHEN
WE EXPLORE OPTIONS "PROFI" AND "ELEVA".
NOW LET US CHANGE SOME OF THE MODEL'S PARAMETERS.  MODEL'S
CURRENT PARAMETERS ARE INDICATED ON THE SUBMENU & DATA LINE.
<end>
LET US DRAW ANOTHER OBJECT. NOTICE AS THE OBJECT IS DRAWN,
THEN IT IS MADE INTO A 3D BLOCK (OR GROUP) WITH A HEIGHT
(OR THICKNESS) OF 1. METER.
<end>
LET US CHANGE THE 3D ATTRIBUTES OF THE GREEN 3D GROUP. USING
THE FUNCTION "3D EDITING" OF GROUPS AREA CHANGE THE HEIGHT
OF THE GROUP TO 0.5 METERS AND LOOK AT THE RESULTS IN 3D.
<end>
SO FAR WE HAVE LOOK AT 3D OBJECTS BUILT FROM GROUND ZERO UP.
NOW LET US MOVE THE GREEN BLOCK UP INTO THE AIR BY CHANGING
ITS ZAXIS VALUE FROM ZERO (GROUND LEVEL) TO 1. METER THEN
3. METERS.  OBSERVE THE PROCESS CAREFULLY.
<end>
WHEN A 3D BLOCK IS COPIED EACH COPY MAINTAINS THE 3D VALUES
OF THE ORIGINAL UNLESS CHANGED.  LET US MAKE 3 MORE COPIES
THEN CHANGE THE ZAXIS VALUES OF ONE TO ZERO AND THE OTHER
TO 1.5 METERS.
<end>
AS YOU NOTICED WHEN THE MIDDLE GREEN BLOCK WAS MOVED UP AND
LEFT IN IT ALSO MOVED IN THE PERSPECTIVE WHILE IT REMAINED
AT THE SAME ZAXIS LEVEL OF 1.5 METERS. NOW LET US LEARN
OPTION "ELEVA" OR ELEVATION.  THE LEFT MOST BLOCK CAN BE
MADE TO STAND UP (AN ELEVATION) ON ITS SIDE BY SIMPLY IDENT-
IFYING IT THEN SELECTING "ELEVA". "F2" SHOWS THE RESULT.
<end>
NOW LET US ELEVATE THE OTHER TWO BLOCKS. CAREFULLY WATCH
THE PROCEDURE AS EACH 3D BLOCK IS FIRST SELECTED THEN
OPTION "ELEVA" IS SELECTED.  UPON SELECTION THE ATTRIBUTE
"ELEVA" IS IMMEDIATELY ASSIGNED TO THE BLOCK.  HERE WE GO.
<end>
A 2D PLAN IS DRAWN IN THE XY PLANE. CHOOSING "ELEVA" CHANGES
THE PLAN TO XZ.  THEREFORE IT IS VERY EASY TO REINTERPRET A
DRAWING WITH SUCH POWERFUL FEATURES.
<end>
LET US DRAW ANOTHER MODEL AT THE CEILING LEVEL.  HERE IS A
TECHNIQUE FOR DRAWING 3D MODELS.  WE SHALL DRAW A VERTICAL
SECTION OF THIS CEILING FEATURE THEN STAND IT UP AND PROJECT
ITS DEPTH.
<end>
HERE IS THE VERTICAL SECTION.  SINCE THE TOP OF THE YELLOW
OUTLINE WAS AT 3.5 METERS LET US SET THE ZAXIS TO 3.5 ALSO.
<end>
THE SUBMENU TELLS US THAT THE RED LINES (VERTICAL SECTION)
ARE TO BE ELEVATED ("ELEVA") THEN EXTRUDED ("EXTRU") BASED
ON THE VALUE SPECIFIED BY HEIGHT ON THE DATA LINE SET TO
0.5 METERS.  THIS SHOULD CHANGE.  THE DEPTH SHOULD MATCH THE
DEPTH OF THE OUTLINE.  LET US MEASURE THE DEPTH OF OUTLINE.
<end>
LOWER LEFT CORNER OF THE YELLOW MODEL WAS SET TO ZERO THEN
THE VERTICAL COORDINATE (BOTTOM NUMBER) OF THE CURSOR WAS
READ TO BE 9.25 METERS WHEN CURSOR WAS PLACED AT THE BACK
OF THE SPACE. AS A RESULT THE OPTION "HIGHT" WAS SELECTED
AND SET TO 9.25 METERS. LET US DRAW A WINDOW AROUND RED
LINES (VERTICAL SECTION OF THE CEILING FEATURE).
<end>
OPTION "ELEVA" TREATS THIS PLAN VIEW OF OBJECT AS AN ELEVA-
TION. NOW FLASH! NEEDS TO KNOW WHICH POINT ON THIS VERTICAL
SECTION (ONCE STOOD UP) WILL BE AT THE ZAXIS OF 3.5 METERS
AS SPECIFIED EARLIER. (SEE ZAXIS VALUE ON DATA LINE ABOVE).
LET US PUT ON THE HOOKS WITH "9" AND SELECT THE LOWER LEFT
CORNER OF THE LEFT MOST LINE.
<end>
IN EFFECT WE HAVE IDENTIFIED TO FLASH! THIS POINT TO BE
PLACED AT 3.5 METERS.

PRESSING "F2" WILL SHOW US THE PERSPECTIVE WIREFRAME AND
"ALT F2" THE MODEL WITH HIDDEN LINES REMOVED.
<end>
LET US CHANGE THE ZAXIS OF THE CEILING FEATURE TO 2.5 METERS
AND SEE IT IN 3D BELOW THE CEILING LEVEL.  THEN CHANGE ZAXIS
TO ZERO AND SEE IN ON THE GROUND LEVEL ZERO.
<end>
LET US SEE WHAT HAPPENS IF THE OPTION "ELEVA" IS TURNED OFF.
<end>
AS YOU SAW THE LINES WERE NOT STOOD UP ON THEIR ENDS THEN
PROJECTED BACK 9.25 METERS.  THEY WERE SIMPLY PROJECTED
9.25 METERS UP.
THEREFORE "ELEVA" SERVES TO TELL FLASH! IF A MODEL IS TO BE
REPRESENTED AS A PLAN OR ELEVATION.  REMEMBER AN ELEVATION
IS ALWAYS FRONTAL AND UPRIGHT NEVER AT AN ANGLE OR OBLIQUE.
<end>
TO DRAW AN ELEVATION THAT IS AT AN ANGLE AND NOT FRONTAL
SIMPLY CREATE A FRONTAL 3D ELEVATION THEN ROTATE THE OBJECT.
LET US RESTORE THE CEILING FEATURE TO ITS INTENDED ORIEN-
TATION THEN MOVE IT AND ROTATE IT TO SEE THE DIFFERENT
RESULTS.
THEN WE SHALL DEMONSTRATE THE SAME USING THE GREEN BLOCKS.
<end>
NOW LET US DEMONSTRATE TWO OTHER OPTIONS "XY" AND "XY @Z".
OPTION "XY" MEANS A 2 DIMENSIONAL PLANE ALONG THE X AND Y
AXIS.  OPTION "XY @Z" REFERS TO THE SAME XY PLANE BUT AT
A PARTICULAR ZAXIS (ZAXIS=0 MEANS GROUND LEVEL).
<end>
WE HAVE CREATED AN OUTLINE ALONG THE XY PLANE AT GROUND
LEVEL ZERO (ZAXIS=0).
NOW LET US COPY IS OUTLINE AND CHANGE ITS ZAXIS VALUE
PLACING THE NEW COPY SLIGHTLY HIGHER ABOVE GROUND (0.5
METERS ABOVE GROUND).  THEN MAKE MORE COPIES EACH 0.5
METERS ABOVE THE PREVIOUS COPY.
<end>
NOW LET US CHANGE THE HEIGHT AND THE ANGLE OF THE VIEW
POINT TO 6. METERS LOOKING DOWN -30 DEGREES.
<end>
THE SIMPLEST 3D MODEL HAS THE "XY" ATTRIBUTE.  HERE ARE
SOME MORE SOPHISTICATED APPLICATIONS OF THE "XY" OPTION.
<end>
HERE IS A PLANE ALONG THE X & Y AXIS ELEVATED WITH "ELEVA".
LET US CHANGE THE 3D ATTRIBUTES OF THE VIEW POINT.
<end>
NOW MAKE SOME COPIES OF THIS SIMPLE 3D BLOCK.

THEN OBSERVE AS THE COPIES ARE MANIPULATED IN VARIOUS
<end>
AS YOU HAVE NOTICED THE INSIDE RECTANGLES WITHIN EACH OF THE
THREE GROUPS ACT AS HOLES ON A PLANE.
<end>
NOW CHANGE THIS ELEVATED PLANE TO A FLAT PLANE ALONG THE XY.
<end>
THE OPTION "XY @Z" HAS JUST BEEN ADDED TO THE PLANE.REMEMBER
THAT OUR CURRENT HEIGHT IS 2.5 METERS AS INDICATED ON THE
DATA LINE ABOVE.
<end>
FLASH! HAS DRAWN THE ORIGINAL PLANE AT ZAXIS OF ZERO AND
THE OPTION "XY @Z" CAUSE IT TO DRAW ANOTHER PLANE IDENTICAL
TO THE ORIGINAL @2.5 METERS ABOVE THE ORIGINAL COPY.
NOW LET US MOVE THE OTHER COPY TO 3. METERS BELOW GROUND 0.
<end>
NOW CHANGE THE HEIGHT TO 0.5 METERS.
<end>
THE OPTION "EXTRU" (EXTRUDE) HAS BEEN SELECTED LET US SEE
THE DIFFERENCE IT MAKES IN THE APPEARANCE OF THE 3D BLOCK.
<end>
NOW CHANGE THE HEIGHT OF THE VIEW POINT TO 6 METERS FOLLOWED
BY CHOOSING THE "ELEVA" OPTION TO STAND UP THE 3D MODEL.
<end>
LET US EXPLORE WHAT HAPPENS IF OTHER POLYGONS ARE PLACED
INSIDE THE EXISTING HOLES.
<end>
DISABLING THE OPTION "XY @Z" IS EQUAL TO REMOVING THE TOP
COVER OF THIS EXTRUDED SHAPE.
<end>
AS USUAL THE LAST PERSPECTIVE SHOT WITH ITS HIDDEN LINES
REMOVED IS ON THE OTHER TABLE.  LET US LOOK AT IT USING "/"
TWICE. ONCE TO GO TO TV02 (AS INDICATED ON THE STATUS LINE)
AND A SECOND TIME TO RETURN BACK TO TV01 AND CONTINUE.
<end>
DISABLING THE OPTION  "XY" IS EQUAL TO REMOVING THE BOTTOM
COVER OF THIS EXTRUDED SHAPE.
<end>
TO SEE THE EFFECT OF THE ABSENCE OF "XY" & "XY @Z" LET US
DRAW A GRID 2. METERS BELOW THE GROUND ZERO LEVEL.  WATCH
EACH STEP CAREFULLY AS VARIOUS FUNCTIONS ARE USED TO ACHIEVE
THE GRID.  ONCE THE GRID IS COMPLETED A 3D PERSPECTIVE IS
GENERATED AND ON TV02 IT IS CLOSELY LOOKED AT. NOTICE THAT
THE HOW THE SHAPE WITHOUT TOP AND BOTTOM COVER APPEARS.
<end>
LET US PUT BACK THE BOTTOM COVER BY SELECTING OPTION "XY".
<end>
NOW LET US PUT BACK THE TOP COVER BY SELECTING OPTION "XY@Z"
<end>
IT IS TIME TO EXPLORE A VERY INTERESTING 3D OPTION "PROFI"
(PROFILE).  A PLAN AND A SECTION (PROFILE) OF AN OBJECT CAN
MERGE TO CREATE THE 3D MODEL. A COLUMN MAY HAVE A SQUARE
PLAN AND A MORE COMPLEX PROFILE.  FROM THIS INFORMATION
"PROFI" (PROFILE) OPTION AUTOMATICALLY BUILDS THE COLUMN.
<end>
TO BEGIN WITH, AS A REFERENCE LET US DRAW A FLOOR PATTERN.
<end>
THE YELLOW LINE REPRESENTS A PLAN VIEW OF ONE EDGE OF A WALL
AND THE MAGENTA SHAPE REPRESENTS THE VERTICAL SECTION OR THE
PROFILE OF THAT WALL.
TO HAVE FLASH! BUILD A 3D MODEL OF THIS WALL SELECT THE
FUNCTION 3D BLOCKS AND THEN THE OPTION "PROFI" PROFILE.
<end>
NOW DRAW A WINDOW AROUND THE TWO SHAPES.
<end>
NOW LET US TELL FLASH! WHERE ON THE MAGENTA VERTICAL PROFILE
THE YELLOW PLAN LINE WOULD BE.  SINCE THE MAGENTA PROFILE
MEETS THE GROUND LEVEL ZERO AT ITS LOWEST POINT AND THAT IS
WHERE THE YELLOW LINE OF WALL IS, THE LOWEST POINT OF THE
MAGENTA PROFILE IS SELECTED.
<end>
NOW LET US LOOK AT THIS 3D MODEL. PRESS "F2".
<end>
LET US MOVE THE VIEW POINT AND LOOK AT IT FROM A DIFFERENT
POINT OF VIEW.
<end>
NOW THAT THE BASIC CONCEPT HAS BEEN DEMONSTRATED LET US
SEE A MORE COMPLEX OUTLINE.
<end>
LOOK ON THE DATA LINE ABOVE THE PARAMETER OF THIS SHAPE IS
"+",  IT COULD HAVE BEEN "-".  THE "+/-" TURNS A PROFILE
INSIDE OUT.  FLASH! ASSIGNS EITHER "+" OR A "-" TO A
BLOCK. IT IS UP TO YOU TO DECIDE WHICH PARAMETER CORRECTLY
REPRESENTS THE 3D SHAPE.  HERE IS THE SAME WALL WITH A
"-" PARAMETER.  NOTICE THE WALL IS TURNED INSIDE OUT.
<end>
HERE IS ANOTHER ILLUSTRATION OF THE SIGNIFICANCE OF THIS
PARAMETER.  LET US DRAW A COLUMN  WITH A SIMPLE SQUARE
BASE (YELLOW) AND A PROFILE (VERTICAL SECTION) IN MAGENTA.
THIS COLUMN IS THEN MADE INTO A 3D BLOCK WITH "PROFI" USING
A "+" PARAMETER.
<end>
NOW CHANGE THE PARAMETER TO "-". NOTICE HOW THE COLUMN IS
TURNED INSIDE OUT.
<end>
THE PROFILE (VERTICAL SECTION) MUST BE DRAWN IN MAGENTA.
THE PLAN MAY BE DRAWN IN ANY COLOR BUT MAGENTA.  BOTH THE
PROFILE AND THE PLAN MAY BE MUCH MORE COMPLEX. LET US
CHANGE THE OUTLINE SLIGHTLY.
<end>
HERE ARE SOME MORE INTERESTING EXAMPLES OF WHAT CAN BE
DONE WITH THIS POWERFUL OPTION.  SIT BACK AND ENJOY THE
DEMONSTRATION.
<end>
THE OPTION "PROFI" (PROFILE OR VERTICAL SECTION) CAN BE
USED IN CONJUNCTION WITH OTHER OPTIONS SUCH AS "ELEVA"
(ELEVATION).  HERE ARE SOME EXAMPLES.
<end>
NEXT IS THE ALL POWERFUL OPTION CALLED "SLOPE".  AS ITS
NAME SUGGESTS IT IS USED TO CREATE SLOPED SURFACES SUCH
AS A CATHEDRAL CEILING OR A PITCHED ROOF.
LET US DRAW A 3 DIMENSIONAL ROOF. HERE IS THE BASE OF
THE ROOF.
<end>
THEN LET US DRAW THE PLAN VIEW OF THE SLOPING LINES OF THE
ROOF.  THE SLOPE LINES MUST BE DRAWN IN MAGENTA.
<end>
NOTICE THAT ONE LINE WAS LEFT OUT ON PURPOSE.  THIS WILL
CAUSE THE WRONG DISPLAY AS WILL SOON BECOME EVIDENT.  IN
THE 3 DIMENSIONAL SPACE IT IS EASY TO FORGET SMALL DETAILS.
THERE IS ALSO ANOTHER ERROR NOT YET EVIDENT IN THIS MODEL.
BUT LET US CONTINUE AND LATER SHOW YOU HOW EASILY PROBLEMS
ARE CORRECTED.
<end>
THE OUT LINE (YELLOW) WILL REMAIN AT THE ZAXIS OF ZERO AS
INDICATED.  THE HEIGHT HOWEVER IS CHANGED TO 3. METERS. AS
A RESULT THE TIP OF THE ROOF WILL BE 3. METERS ABOVE ITS
BASE.
<end>
HERE IS ONE OF THE TWO ERRORS. THE TIP OF THE MAGENTA SLOPE
DOES NOT MEET THE YELLOW CORNER. THIS IS BECAUSE THE HOOKS
(KEY "9") WAS NOT USED TO AUTOMATICALLY CAPTURE THIS CORNER
WHEN THE MAGENTA LINE WAS BEING DRAWN.  THIS IS A COMMON
MISTAKE. MAKE A NOTE OF IT.  NOW LET US CORRECT THIS ERROR.
THE MODEL IS FIRST SENT TO THE CONSTRUCTION AREA.
<end>
TO CORRECT THE PROBLEM THAT THE MISSING SLOPE LINE CREATED
TRANSFER (EXPLODE) THE MODEL TO THE CONSTRUCTION AREA AND
ADD THE LINE THEN RECREATE THE 3D BLOCK "USING 3D BLOCKS".
OBSERVE THE PROCEDURE AND THE RESULT.
<end>
NOW TO LOWER THE TOP OF THE ROOF FROM 3. METERS TO 1.5
METERS JUST USE "3D EDITING" AND SPECIFY THE NEW HEIGHT.
<end>
NOW LET US DRAW A DIFFERENT KIND OF ROOF USING SOME VERY
INTERESTING TECHNIQUES SUCH AS PROJECTING INWARD AND SMALLER
A COPY OF THE OUT LINE TWICE AT DIFFERENT SIZES.
<end>
LET US PUT A COVER ON TOP USING THE "XY @Z" FUNCTION.  THIS
PUTS A PLANE (XY) AT THE HEIGHT (@Z) SPECIFIED ABOVE (1.5).
<end>
IT IS POSSIBLE TO USE THE OPTION "ELEVA" IN CONJUNCTION WITH
WHAT WE HAVE USED THUS FAR.  LET US EXPERIMENT.
<end>
THE ROOF WAS STOOD UP (ELEVATED) ON ITS SIDE WITH ITS LOWER
HALF UNDER THE TILES.  NOTICE THE ORIGIN OF THIS 3D BLOCK.
WHEN "ELEVA" WAS APPLIED THE ROOF WAS STOOD UP (ROTATED)
ABOUT ITS ORIGIN.  NOW YOU SEE HOW IMPORTANT THE LOCATION
OF THE ORIGIN CAN BE.  LET US MOVE THE ORIGIN BY EXPLODING
AND THEN RE-BLOCKING THE ROOF SPECIFYING A LOWER ORIGIN.
<end>
NOW LET US STUDY THE EFFECTS OF THE OPTION "TRANS" WITH
WHICH 3D BLOCKS BECOME TRANSPARENT.  AT THE TIME OF HIDDEN
LINE REMOVAL TRANSPARENT OBJECTS DO NOT COVER OTHER OBJECTS.
HERE ARE SOME EXAMPLES.
<end>
LET US MAKE SOME OF THESE GROUPS TRANSPARENT USING "TRANS"
AND SEE THE EFFECT OF THIS FUNCTION IN HIDDEN LINE REMOVAL
USING KEY "ALT F2"
<end>
MOST OFTEN "TRANS" IS USED WITH "XY" (PLANE ATTRIBUTE) TO
CREATE ANY FLOOR PATTERN UNDER WHICH THERE IS NOTHING ELSE.
KEEPING SUCH ELEMENT TRANSPARENT ENHANCES THE SYSTEMS OVER-
ALL RESPONSE. ANOTHER EXAMPLE WOULD BE ELEVATIONS AT THE
PERIMETER OF A MODEL OUTSIDE OF WHICH THERE IS NO OTHER
3D OBJECT.  HERE ARE SOME EXAMPLES.
<end>
THIS GRID IS NOT MADE FROM CLOSED POLYGONS.  IT IS MADE
FROM A NUMBER OF PARALLEL LINES IN TWO DIRECTIONS.  IF
"TRANS" IS NOT ASSIGNED TO THIS PLANE WHEN DOING A HIDDEN
LINE REMOVAL THE SYSTEM WOULD GENERATE ERRORS.
<end>
A VERY USEFUL 3D OPTION WITHIN BOTH "3D BLOCKS" OF CONST-
RUCTION AREA AND "3D EDITING" IN THE GROUPS AREA IS THE
OPTION "MATCH".  THIS OPTION ASSIGNS ALL 3D ATTRIBUTES OF
AN EXISTING 3D BLOCK TO ANOTHER BLOCK.  THIS FUNCTION
SAVES A LOT OF DATA ENTRY AND ELIMINATE THE POSSIBILITY OF
OPERATOR ERROR.  IT ALSO ALLOWS YOU TO MAKE CHANGES FAST.
<end>
A NUMBER OF 3D BLOCKS HAVE BEEN CREATED EACH WITH ITS OWN
UNIQUE 3D ATTRIBUTES.
<end>
BETWEEN THE YELLOW CEILING BEAMS
LET US DRAW SOME CEILING BRACES WHOSE ZAXIS VALUE AND HEIGHT
IS EQUAL TO THE BEAMS.
<end>
TO ASSIGN THE 3D ATTRIBUTES OF THE BEAMS TO THE RED BRACES
SELECT THE OPTION "MATCH" THEN PICK ONE OF THE BEAMS WITH
THE CURSOR. ZAXIS AND HEIGHT VALUE CHANGE TO 4. & 0.4 RESPE-
CTIVELY. NOW DRAW A WINDOW AROUND THE BRACES AND THE SAME
3D VALUES ARE ASSIGNED TO THE BRACES.
<end>
LET US MAKE THE 3D ATTRIBUTES OF THIS YELLOW RECTANGLE EQUAL
TO THAT OF THE CYAN RECTANGLE FURTHER TO ITS LEFT.
<end>
IN "3D EDITING" OF THE GROUPS AREA THE IDENTICAL FUNCTION
EXISTS AND IT IS USED FOR THE SAME PURPOSE.  THE DIFFERENCE
BEING THAT YOU SELECT THE 3D BLOCK TO BE MATCHED FIRST, THE
"MATCH" OPTION SECOND AND THE 3D BLOCK TO MATCH THIRD.  HERE
ARE SOME EXAMPLES.
<end>
                 THIS IS THE END OF TUTORIAL 010
<end>