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lessn015.msg
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1996-11-15
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58 lines
*********************** RANDOM COPY ********************
THERE ARE THREE DIFFERENT WINDOWS WITH WHICH GEOMETRY CAN BE
COPIED AND COPIES PLACED IN A RANDOM FASHION. COMPLETELY
CONTAINED (CC), PARTIALLY CONTAINED (PC), & CUTTING WINDOW
(CUT). THE SUBMENUS OF ALL THREE RANDOM COPY FUNCTIONS ARE
THE SAME. TO DEMONSTRATE RANDOM COPY LET'S DRAW A RECTANGLE.
<end>
PRESS "1" FOR THE MAIN MENU.
SELECT "RANDOM C.C." FROM THE MAIN MENU.
<end>
THIS FUNCTION COPIES VECTORS USING A COMPLETELY CONTAINED
WINDOW.
\
ACTIVATE CURSOR TWICE TO ENCOMPASS THE RECTANGLE IN
A WHITE WINDOW.
<end>
ALL FOUR VECTORS OF THE RECTANGLE ARE IN THE WINDOW.
ACTIVATE CURSOR TO CREATE A HANDLE.
<end>
ACTIVATE CURSOR AT A NEW LOCATION TO INSERT THE COPY.
<end>
TO MAKE ANOTHER COPY, MOVE, THEN ACTIVATE CURSOR .
<end>
LET US CREATE AN ARROW USING THE "RANDOM C.C." COPY.
<end>
BELOW APPEARS THE RIGHT HALF OF AN ARROW. LET US COMPLETELY
CONTAIN ALL FOUR LINES & MAKE COPIES USING AN ARBITRARY
HANDLE POINT.
<end>
NOW LET US DEMONSTRATE THE IMPORTANCE OF THE HANDLE POINT.
\
RESELECT THE FOUR LINES & SELECT THE TIP OF THE ARROW AS
IT'S HANDLE POINT.
<end>
NOW CHOOSE THE YELLOW SUBMENU FUNCTION "MIR Y" TO MAKE A
MIRROR COPY OF THE HALF-ARROW ABOUT THE VERTICAL AXIS.
THIS POINT IS ALSO THE HANDLE POINT.
<end>
*********************** IMPORTANT **********************
\
SELECTING A SUBMENU FUNCTION INSERTS A WHITE BAR OVER IT.
<end>
SELECT THE TIP OF THE ARROW TO INSERT THE MIRRORED COPY.
<end>
PRESS "." TO UNSELECT THE HALF-ARROW.
<end>
NOW DRAW A WINDOW AROUND THE ARROW.
<end>
SELECT THE HANDLE AT IT'S UPPER TIP.
<end>
SELECT THE RED SUBMENU "-90". THIS CAUSES THE SUBSEQUENT
COPIES OF THE ARROW TO ROTATE 90 DEGREES CLOCKWISE.
<end>
ACTIVATE CURSOR TO INSERT A ROTATED COPY ON THE SCREEN.
<end>
********************* END OF LESSON ********************
<end>