Power of Polygons
Polygon Star:
ERASE "PStar
TO PStar :n :Size
REPEAT :n [
LT 60 FD :Size RT
120 FD :size LT 60
RT 360/:n
]
END
PStar 8 100 ; 8 pointed star
Super Polygons - Polygons Outside:
We can use the following procedures to draw
designs in Figure 12-7 and Figure 12-8.
ERASE "L.Polygon
TO L.Polygon :Size :N
REPEAT :N [
FD :Size LT
360/:N
]
END
ERASE "Super.Polygon
TO Super.Polygon :Size :N1 :N2
REPEAT :N1 [
L.Polygon :Size :N2
FD :Size RT
360/:N1
]
END
The following instructions will produce the
required designs.
Super.polygon 50 8 3 ; Octagon surrounded
by a triangles
Super.polygon 50 6 6 ; Honeycomb design
Super Polygons - Polygons Inside:
We can use the following procedure to draw
polygons with polygons on the inside as shown in Figure 12-11.
ERASE "Super.Polygon.In
TO Super.Polygon.In :Size :N1
:N2
REPEAT :N1 [
Polygon :N2 :Size
FD :Size
RT 360/:N1
]
END
The following instructions will produce the
required designs.
Super.Polygon.In 100 10 4
PE Polygon 100 10 PPT
Super.Polygon.In 100 12 6
PE Polygon 100 12 PPT
Super.Polygon.In 100 10 5
Designs using spikes:
We can use the following instructions to create the designs shown in Figure 12-14.
12 pointed star using spikes:
REPEAT 12 [Spike 80 100 RT 360/12]
36 pointed star using spikes:
REPEAT 36 [Spike 85 50 RT 360/36]
Hexagon of
fingers:
We can create the fingers pattern shown here using the Spike procedure created above.
REPEAT 5 [Spike 83 100]
We can then rotate this Fingers pattern to get a hexagon of fingers!
REPEAT 6 [
REPEAT 5 [
Spike 83 80
]
RT 60
]
Design using Letter I:
We can use the following procedure to draw a letter i.
ERASE "LetterI
TO LetterI :size
FD :size PU FD :size*20/50 PD
FD :size*10/50 PU BK :size*80/50 PD
END
We will now rotate this basic pattern to draw the required design using TRT principle.
REPEAT 50 [LetterI 50 RT 360/50]
Chain of Letter H:
We will use the following procedure to draw a letter H of given size.
ERASE "LetterH
TO LetterH :m
FD :m*100 BK :m*50
RT 90 FD :m*50
LT 90 FD :m*50 BK :m*100
END
The following instructions will draw an octagon with Letter H on each side.
PU FD 100 PD
REPEAT 8 [LetterH 1 RT 360/8]
The basic shape of
a “person” can be drawn using the following procedure.
ERASE
"Person
TO
Person :Size
FD
3*:Size LT 90 FD :Size/2 RT 90
REPEAT
4 [FD :Size RT 90]
RT
90 FD :Size/2 RT 90
FD :Size/2
LT 90
FD :Size/2
RT 90 FD 1.5*:Size BK 1.5*:Size
LT
90 BK :Size RT 90 FD 1.5*:Size BK 1.5*:Size
RT
90 BK :Size/2 RT 90 BK 2.5*:Size
END
The following instructions will draw an octagon with a Person figure on each side.
REPEAT
8 [
FD 50/2
LT 90 PERSON 30 RT 90
FD 50/2 RT 360/8
]
We now make the polygon in the design invisible to obtain the required design.
CS
REPEAT 8 [
PU FD 50/2 PD
LT 90 PERSON 30 RT 90
PU FD 50/2 PD
RT 360/8
]
Polygon Rings:
We can use the following instructions to create the designs shown in Figure 12-20.
Ring of Circles:
Here the existing dCircle procedure is used to draw circles of given diameter.
CS REPEAT 36 [dCircle 50 PU FD 25 PD RT 10]
Pentagon of Pentagons:
CS
REPEAT 5 [
Polygon 5 150 ; Pentagon on the side
SETPENSIZE 8
FD 50 RT 360/5 ; Base pentagon
SETPENSIZE 3
]