The Origami Forum

I've recently downloaded "Robert Lang's' treemaker, So i could get some idea's on how to design insect cp's. But whenever I hit 'build crease pattern' something pops up not allowing me to build the cp. I don't understand the message, and need help.

a screenshot , or what the message says would be helpful. all i can think of is that you haven't edited all your points correctly, and the crease pattern is actually impossible to create from the points you have given

treemaker wasn't able to construct all polygons possibly because a polygon was non-convex or contained one or more nodes in its interior.

Boonwagon wrote:treemaker wasn't able to construct all polygons possibly because a polygon was non-convex or contained one or more nodes in its interior.

OK, that's the error message. Here's what it means with annotation.

TreeMaker wasn't able to construct all polygons [meaning, all of the creases that go inside each of the active polygons], possibly because a polygon was non-convex [meaning one of the polygons that it was trying make creases for has a corner whose angle is greater than 180 degrees] or contained one or more nodes in its interior [which means that a polygon has a node, i.e., a circle, rattling around inside of it].

Usually, it's the last issue: when you've done the "scale everything" command, there are one or more nodes (circles) that can still "rattle around" inside all of the other rigidly packed circles and rivers. If that's the case, the usual best solution is to select all nodes and edges (use the menu command), then use the Action>Scale Selection command, which will "inflate" anything that's rattling around until it is pinned rigidly. You may need to do this 2 or 3 times until everything is rigidly pinned. But once everything is rigid, you should be able to build creases.

Hope this helps!

This is my new account because I lost the password to my old one. And yeah, it helps Thank you so much Dr. Lang!

What happens if I get the error message that says "Treemaker wasn't able to fully compute the facet ordering because there were multiple zero-depth local root networks or a local root network was not connectable to lower-depth root networks. This means that the direct algorithm for facet ordering and crease assignment won't work. While you may still be able to find a flat-foldable crease assignment, this usually means that the initial configuration was far from optimal. Try moving some leaf nodes so that the disconnected parts of the corridor wall formed by the selected vertices creases will be forced closer together and re-optimize." ?

What happens if I get the error message that says "Treemaker wasn't able to fully compute the facet ordering...Try moving some leaf nodes so that the disconnected parts of the corridor wall formed by the selected vertices creases will be forced closer together and re-optimize." ?

What happens is that the optimization process stops unless you make some changes along the lines of the suggested course of action. Or you can just find the facet ordering by hand (by actual manipulation of the paper); usually a valid ordering, if it exists, is fairly easy to find.

Any suggestions on how to make the scale larger? It doesn't really say much in the tutorial...

In the Inspector window, you can set the value of the scale to be anything you want.

Normally, though, the scale is the parameter than you optimize. So when you "Scale Everything," TM will try to make the scale as large as possible, subject to the tree dimensions that you've entered and the conditions you've placed on your tree.