Challenge: Faking 3D extrusion of a polygon
Hi
This is a challenge of making a fake 3D extrusion of a random shaped polygon.
In very simple cases you can just copy the polygon, put it behind with a little
offset and shade it a little darker than the front polygon.
But if the offset gets a little larger then one can see that the two polygons
doesn't form one object.
This is a far as I have come:
Make a random polygon and name it P1
Make the color fx light green and set the lineSize to 0
Make two copies of P1 and send them behind P1
Name the two copies P2 and P3
Color them both the same darker shade of the green color.
Now make a Button with this script:
on mouseUp
lock screen
put points of grc P1 into points1
set points of grc P2 to points1
move grc P2 relative 25,0
put points of grc P2 into points2
put line 1 of points1 & return after newPoints
put line 1 of points2 & return after newPoints
repeat with i = 2 to number of lines of points1-1
if not within(grc P2,line i of points1) then put line i of points1 &
return after newPoints
if not within(grc P1,line i of points2) then put line i of points2 &
return after newPoints
if within(grc P1,line i of points2) and within(grc P2,line i of points1)
then put line i of points2 & return after newPoints
end repeat
put line 1 of points1 & return after newPoints2
put line 1 of points2 & return after newPoints2
repeat with i = 2 to number of lines of points1-1
if not within(grc P1,line i of points2) then put line i of points2 &
return after newPoints2
if not within(grc P2,line i of points1) then put line i of points1 &
return after newPoints2
if within(grc P1,line i of points2) and within(grc P2,line i of points1)
then put line i of points2 & return after newPoints2
end repeat
set points of grc P2 to newpoints
set points of grc P3 to newpoints2
end mouseUp
Clicking the Button should give you an extruded looking object.
BUT…..
Both P2 and P3 are faulty.
Only together on top of each other they look right.
Can you make it better?
Can you make the extruded look with only one extra object (apart from the
original)?
Mic
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