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Tillering Tree Build-a-long?
Timo:
Paul, have you ever tried to project the elliptical circles on the wall with your tiller tree? I was thinking about that the other day and was wondering how. I saw a program years ago about how to figure and draw elliptical, with 2 nails and a string? Can't remember.
The paint program really helps to see tiller. We need to figure out how to draw it on the wall.
I found a link for a how to draw ellipticals, but not sure if I can post it here?
El Destructo:
OK..here Goes............Draw a line AB that equals the length .......and a line CD that equals the width of the required ellipse .......so that the mid points intersect and they are perpendicular to each other....... These are the blue lines.... Drive a finishing nail at point A and point B.... using a type of string that will not stretch...... tie a loop in the end and loop it around the nail at A....... pull it across and tie another loop in it so it is tight when looped around nail at B........ Remove the nails and drive one in at C.... loop both ends around this nail..... pull the double ply of string back toward the line AB with a nail in the loop and drive a nail in the spot where it intersects line AB at E...... Do the same to establish point F and drive another nail there....... this is represented by the red lines..... Remove the nail at C and loop the ends of the string around the nails at E and F...... place the point of a pencil in the loop formed by the string and starting at A draw an arc around the top ending at B...... move the loop in the string to the other side of F and draw an arc from B around the bottom to end at A....now wasn't that easy......... :P
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El Destructo:
But this is slick as Owl Scat..............
metacafe.com/watch/399991/draw_a_perfect_ellipse/
Josh:
--- Quote from: El Destructo on February 14, 2010, 01:51:18 pm ---OK..here Goes............Draw a line AB that equals the length .......and a line CD that equals the width of the required ellipse .......so that the mid points intersect and they are perpendicular to each other....... These are the blue lines.... Drive a finishing nail at point A and point B.... using a type of string that will not stretch...... tie a loop in the end and loop it around the nail at A....... pull it across and tie another loop in it so it is tight when looped around nail at B........ Remove the nails and drive one in at C.... loop both ends around this nail..... pull the double ply of string back toward the line AB with a nail in the loop and drive a nail in the spot where it intersects line AB at E...... Do the same to establish point F and drive another nail there....... this is represented by the red lines..... Remove the nail at C and loop the ends of the string around the nails at E and F...... place the point of a pencil in the loop formed by the string and starting at A draw an arc around the top ending at B...... move the loop in the string to the other side of F and draw an arc from B around the bottom to end at A....now wasn't that easy......... :P
--- End quote ---
El Destructo:
OK Josh...this one is a lot simpler............... :P
ehow.com/how_5798075_draw-specific-size-oval-ellipse.html
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