On second thought I suspect you have that much down and you fail to see how to branch of into the right direction at 1/n of the length and to the left at 1/k for k < n with different angles.
On Nov 13, 2010, at 10:09 AM, Matthias Felleisen wrote: > > Here is a hint I posted some N years ago for my freshmen: > > Recall the hint: "Think of the problem as drawing a straight line, given > its starting point and an angle in, say, radians." Graphically the situation > looks like this: > <savanah.png> > > Your given the starting point (x0,y0) the _length_ and the angle _a_ and you > want to add the red line to the picture. To do so, you need to figure out the > length of the _green_ and _black_ lines. And they are: (* length (sin a)) and > (* length (cos a)) respectively. Note that radian means > fractions of pi, e.g., (/ pi 6) for 30 degrees. > > > > On Nov 12, 2010, at 10:00 PM, Ken Hegeland wrote: > >> I have a nearly working code, it draws the tree, but it is slightly off. I >> realize what is wrong that is causing the problem, for each recursive call I >> used a set angle. The tree draws all the left branches at the same angle and >> all right branches at the same angle. I end up with a picture of a tree with >> the left branch not having any more left branches, only right branches. The >> right side of the tree has only left branches, no right branches. >> >> My first thought for gradually changing the angle is to use something like >> (- a 10) for the angle in one recursive call, and (+ a 10) in the next, but >> this produces a straight line with other lines way off to the right side. I >> am using a helper function which converts an angle from degrees in radians >> to help me more easily visualize where the branches should point. Is my >> thought process going in the correct direction? If anyone wants to see the >> code I have feel free to email me, as always, thanks in advance for any help. >> >> _________________________________________________ >> For list-related administrative tasks: >> http://lists.racket-lang.org/listinfo/users > > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/users
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