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- ************************* POLYGONS *************************
- \
- THIS TUTORIAL EXPLORES THE VARIOUS ASPECTS OF DRAWING
- POLYGONS.
- \
- TO START WITH LET US SELECT "POLYGON" FROM THE MENU.
- <end>
- DEFAULT VALUE "HEX" DRAWS HEXAGONS, "CE 1P" DRAWS POLYGONS
- FROM CENTER TO ONE POINT AND "RPEAT" KEEPS THE FUNCTION
- ACTIVE UNTIL THE KEY "." IS PRESSED.
- LET US DRAW A HEXAGON WITH THE CURRENT DEFAULT SETTINGS.
- <end>
- TO DRAW POLYGONS OTHER THAN HEXAGONS ENTER THE NUMBER OF
- SIDES USING THE OPTION "SIDES". LET US SELECT THIS OPTION
- AND ENTER THE NUMBER 3 FOR THE NUMBER OF SIDES.
- <end>
- THIS TIME USING "SIDES" LET US ENTER THE NUMBER 12.
- <end>
- LET US SELECT THE OPTION "HEX" TO DRAW HEXAGONS.
- <end>
- OPTION "1P 1P" DRAWS POLYGONS FROM ONE POINT TO ONE POINT.
- <end>
- THE OPTION "UNDO" ERASES THE LAST POLYGON.
- <end>
- THE OPTION "CONCN" DRAWS CONCENTRIC POLYGONS.
- <end>
- THE OPTION "ELIPT" CREATES OBLONG OR ELLIPTICAL POLYGONS IN
- CONJUNCTION WITH THE OPTION "RATIO". THE OPTION "RATIO"
- TREATS THE POLYGON AS IF IT HAD A MAJOR AND A MINOR AXES.
- CHANGING THE RATIO BETWEEN THE AXES ELONGATES THE POLYGON.
- <end>
- SELECT THE OPTION "RATIO".
- <end>
- SELECT A POINT ON THE SCREEN AS THE INTERSECTION OF AXES.
- <end>
- MOVE CURSOR THEN ACTIVATE IT TO DEFINE THE MAJOR AXIS.
- <end>
- MOVE CURSOR THEN ACTIVATE IT TO DEFINE THE MINOR AXES.
- <end>
- USING THE DEFAULTS OF "HEX" AND "CE 1P" PLUS "ELIPT" WE
- SHALL NOW DRAW AN ELLIPTICAL HEXAGON FROM CENTER TO ONE
- POINT. LET US SELECT "ELIPT" AND DRAW THE POLYGON.
- <end>
- ************************ END OF LESSON *********************
- <end>