The Origami Forum

How exactly do I make an angle bisector or trisector in the center of the paper? Whenever I try to do this, I have trouble getting a precise fold... there's just no real reference for it, nothing to line the edge up with. I'm good at boxpleats because all of their folds are typically 45-90, but the circle-packed models with multiple center points are giving me trouble.

Also, how do you make folds parallel to a certain line? For instance, in the CP for Kamiya's phoenix, there are alternating mountain/valley folds parallel to the diagonal of the square. How would I fold something like that?
Here's the link for the phoenix: http://www.folders.jp/g/2002/0231.html

Thanks,
Ben

For the angle bisectors in the middle of a square, I usually make the edge folds of the angle I want to bisect mountain folds. Then I bring those mountain folds together through the shared point. The remaining paper behind this point will slightly curve above the area where I do this manoeuvre.

The long parallel lines in the middle of the phoenix CP are made by first folding the angle bisectors on the sides inward. Leaving them folded you precrease through both layers.