Full Version: Lots of unkown

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I wonder if it will possible to hide edges between faces with same continuity* ex: fillet

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Hi Tudor, can you show an example?

- Michael

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left all in
right - desired

Image Attachments:
compare.png 

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Hi Tudor, there is a new function for edge curves in the next beta: edge.getIsTangentEdge() , it should help for making a script that would hide things like you want.

The way you will be able to use it is like this:

 var breps = moi.geometryDatabase.getObjects().getBReps();
 for ( var i = 0; i < breps.length; ++i )
 {
	var edges = breps[i].getEdges();
	for ( var j = 0; j < edges.length; ++j )
	{
		if ( edges[j].getIsTangentEdge() )
			edges[j].hidden = true;
	}
 }

- Michael

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awesome ! thanks !

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Ohayo
I have a modelling question (used sweep to spiral)
needs to be spiral, i've tried different shapes, all awkward

Attachments:
test.3dm

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Generally when you use the Sweep function it's a good thing to put 2 rails for control each side of the profil on the Helix...

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Hi Tudor, I think you want the "Twist = Flat" option and also use "Set flat direction" along your axis:





The "Twist = Flat" option means the profile will not rotate freely around the rail tangent, it will be limited to only pivot around the "flat direction".

The default "Flat direction" is the world z axis, so when you have some other direction you need to click "Set flat direction" to set it.

Another way you can make this kind of thing is by extruding your profile out straight and then use Transform > Deform > Twist on it.

- Michael

Image Attachments:
tudor_sweep_flat1.jpg  tudor_sweep_flat2.jpg 

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@PILOU
i need Mike result, the way u are showing come to same issue that I have

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@Michael Gibson
I haven't used twist modifier so deeply, can u explain step by step how I can reach such result ?
mb gif animation

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Hi Tudor, the Twist way goes like this - you start out with a straight extrusion:



Select the straight extursion block and then run Transform > Deform > Twist .


At the prompts where it asks you for the start and end point of the twist access, pick these 2 points on your cylinder's axis:


Then you input an angle value, each 360 degrees will be one turn, so you could type in 5*360 to do 5 turns for example:



- Michael

Image Attachments:
tudor_twist1.jpg  tudor_twist2.jpg  tudor_twist3.jpg 

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Will be the same with only one turn...depending of what result you want...
In fact the "Flat Direction"
= the Rotation of the Profil depending of it's original position: the Flat Direction change artificially it's position! :)
Here Horizontal or Vertical



A Twist or a Sweep to an Helix will give the same result...in this case...

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thanks both !
I always tried to avoid twist or flow, unpredictable results .. Boolean or fillets could not execute (since v3 haven't tried new ones)

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you can also explore placing a centerline up a helix, then lofting the 2. Shell the result and pipe the centerline with what you wish.

So easier to create the 2 curves and flow those into a shape, that can then be made into a solid with the other steps.

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))) can u make a gif for that ! I'd appreciate 3'd method

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From Burmann method :)
Draw an Arc-cicle for the future Flow

Draw a vertical line, Draw an Helix,
Loft them

Draw another vertical Line
Call Flow
Select Surface
Select Second vertical Line , Select Arc Line
Flow

@ Michael : why we can't retake the first vertical line as Base Line for the Flow Function ?



PS

I have forgotten to make a Tube but that is trivial :)
and a Shell but that will be exactly the same except a thickness to the Helicoïd surface! :)

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Doing the surface creation and shelling "after" tge flow, allows me to monitor the validity of the solid better. I would expect the loft or shell to fail if i had created a "to tight to bend" situation, where flowing the solid result, could more easily allow me to create some type of "bad" geometry (folding over on itself, etc.)

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u are moi monsters, perfect results !
thanks !

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Hi Pilou,

re:
@ Michael : why we can't retake the first vertical line as Base Line for the Flow Function ?

You can, but it's a little difficult to select it since it's in the same location as a surface edge and the edge is getting priority.

Use Edit > Hide to hide the surface so you can then click select the first vertical line for the Flow base line.

- Michael

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Thx for the Info!
I was not enough perceiving! :)

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