Відео

Not sure what your setup is exactly, but the way it works for me, is, I left click and drag to rotate around the cross hairs, and I right click and drag to move the cross hairs to a different location. There is also a reset button on the tool bar at the bottom of the 3d viewing window that will reset the cross hairs to the origin of the x,y,z, axes. Also middle mouse button scrolling will zoom in and out, and holding down the middle mouse button and dragging will move the cross hairs forward and back in the "line of sight" direction.

It's my pleasure, I hope they've been useful.

My pleasure.

I believe that the for loop provides an implicit union over the shapes created within it which is why the intersection_for loop is needed. It is mentioned on this page if you search for "union" en.wikibooks.org/wiki/OpenSCAD_User_Manual/Conditional_and_Iterator_Functions

That's pretty cool, thank you for the info.

I'm not sure what you mean by "all in one". Would you mind elaborating?

@@CharthuliusWheezer By an all-in-one, I mean one upload for you. One intro, one outro, whether it takes you several days or several weeks, whether it's five hours or fifty hours, just all one video compounding and building up on itself.

Not that I know of. There are some other things that can be tried though. 1) you can go to view -> show edges and select that option and then make the model transparent by either putting a % before it eg %sphere(r = 10, $fn = 20); or making it transparent using the color operator eg color([1, 1, 1, 0.3]) sphere(r = 10, $fn = 20); the last channel in the color vector ([1, 1, 1, 0.3]) (ie the 0.3 part) is the alpha channel which can be changed to alter the transparency of the object. 2) you could define the points and connect the edges yourself using either (cubes and hulls) or (angled cubes/cylinders) , but this can be complicated and in some cases requires reinventing the wheel if any boolean operations have been applied. let me know if you need more detail about this option.

@@CharthuliusWheezer Hello. Thank you for advice! 1) Models, to which i apply % are not fully transparent. At least on my vesrion. They are a little bit grey. With transparent thing it works better, but the thing is that edges are not wireframe. =( I can't explain it formally. You can see it with example: color(alpha = 0) translate([10,10,10]) difference() { sphere(100, $fn = 30); cube(95); } New "edges" that came with difference are not edges actually, but you can see them in wireframe view. 2) It is very complicated. It requires refactoring all the code and reinventing, for example, boolean operations, as you said. Imagine reinventing Minkowski sum. Or hull. I'm not sure, if it possible. =) As i understand, hull is something like intrinsic. It is impossible to write it in OpenSCAD therms. Anyway, thank you. I got a view that is close to one I expected. I have 1 more question. Is it possible to make animation not from previews, but renders?

So one thing you could do, for the example of the difference you provided, is to render the shape, export it as an stl or some other model, and then re-import it. but this is dependent on what you are doing and may or may not be useful or practical. I would assume that boolean operations make the previewing not work properly. also just as a note, transparency works in interesting ways. the order that the objects are defined determines if they can be seen through other objects. for the edges and points ie(part 2) here is an example of what I meant: points = [ [0, 0, 0], [1, 0, 0], [0, 1, 0], [0, 0, 1]]; edges = [ [0, 1], [0, 2], [0, 3], [1, 2], [1, 3], [2, 3] ]; for(edge = edges){ i = edge[0]; j = edge[1]; p1 = points[i]; p2 = points[j]; hull(){ translate(p1) cube(size=0.1, center=true); translate(p2) cube(size=0.1, center=true); } } the hull portion could be replaced with a piece of code that creates a cylinder, places the base at p1 and the makes the length the distance between p1 and p2 and then angles the cylinder to point at p2. I think it could be possible to implement the algorithms that are used in OpenSCAD within OpenSCAD but it would be tedious and they would likely be much slower than the ones that are used already. for the last question. I think it's not currently supported but anything is possible with enough time and effort and sometimes just knowing where to look, but I don't know. Here is a thread with the same question being asked and responded to. forum.openscad.org/Can-I-force-Animation-to-use-quot-Render-quot-instead-of-quot-Preview-quot-td14828.html

You're Welcome. I'm happy to hear they are value added.

@@CharthuliusWheezer Mr. Wheezer maybe you could help me with a design. I am trying to create a paraboloid. I have been using a 2D parabola function (x = x*x/(4*a)) and small squares to create the parabola, I then use a for loop to rotate around the z axis to create the paraboloid. However, my paraboloids surface is not at the quality I would like it to be. Do you think using the surface hull would improve the surface smoothness of my design? Would you have any other suggestions to make a finer surface?

For a simple paraboloid, the code below should work. you can play with the "steps" value and the "$fn" value in the rotate_extrude function to get the surface smoothness that you like. if your paraboloid function is more complex, as in you want different parameters for the x and y directions to get the shape to be more oblong, then a surface hull is probably the best bet in terms of writing the code in OpenSCAD. One issue with the code below is that if you comment out the rotate_extrude function and look at the cross section produced by the chained hull, you can see that the wall thickness is not consistent which may be an issue depending on your application. This is a simple way to do this. essentially just create a 2d parabola and rotate_extrude it into a paraboloid. It should be easier on computer memory and easier to render than a surface hull, but I have not tested the timing to see if that is the case. function f(X, A) = X*X / (4*A); space = 10; steps = 10; square_size = [0.001, 1]; a = 2; rotate_extrude($fn=20) for(i = [0:steps-2]){ x = space * i / (steps-1); x2 = space * (i+1) / (steps-1); hull(){ translate([x, f(x, a)]) square(size=square_size, center=false); translate([x2, f(x2, a)]) square(size=square_size, center=false); } }

Essentially the module has to produce a 2d shape. So the functions that are used in the module have to lead to a 2d shape being produced. for example: //======================== module moved_diamond(x){ translate([x, 0]) scale([1, 2]) rotate([0, 0, 45]) square(size=1, center=true); } rotate_extrude($fn=100) moved_diamond(10); //======================= The "moved_diamond" module produces a 2d shape and the rotate_extrude function can be used on it. this would not work if a 3d shape was produced instead.

Hi. I do not know of any other OpenSCAD like software specifically for Android. You could try contacting the developer of ScorchCAD and requesting that feature explicitly. A possible workaround would be if you just want to take pictures and put them in a video, you can create your own animation variable, change it slightly for each frame, and take a photo or a screenshot at each frame and then put them together in a video. However this process would be really slow.

So in this case, when performing a surface hull on spherical co-ordinates the way it is implemented in the video, it won't make too much of a difference but using cube([s, s, thickness], center=true); will be more accurate if "s" is not small. However, care must be taken to ensure that the cube starts at the right place. This sample could be used instead of doubling the code. This allows the user to input a negative thickness to get the thickness to go inwards instead of outwards. hull(){ rotate([0, 0, theta]) rotate([0, phi, 0]) translate([0, 0, Rho(phi, theta)+thickness/2]) cube([s, s, abs(thickness)], center=true); rotate([0, 0, theta2]) rotate([0, phi, 0]) translate([0, 0, Rho(phi, theta2)+thickness/2]) cube([s, s, abs(thickness)], center=true); rotate([0, 0, theta]) rotate([0, phi2, 0]) translate([0, 0, Rho(phi2, theta)+thickness/2]) cube([s, s, abs(thickness)], center=true); } So to answer your question, yes, you can use that piece of code to avoid doubling the code.

Yes, Thank you for making a point of highlighting this.

What a tricky note!

Just the editor that comes with OpenSCAD.

Hi, Thank you for the comment. I am by no means a computer security expert so any recommendation that I make may not be the best approach to keeping your files secure. For more comprehensive ways on how to protect your files, I recommend looking for tips from security youtubers or bloggers. That being said, two simple approaches that you could take are 1.) Plugging your usb device into whatever computer you are working on while you are writing your OpenSCAD code and only saving it to that usb device and not to the computer you are working on. This would be an issue, however, if you lost or damaged your usb device or if the computer is not secure while you are working on the code. and 2.) you could encrypt the .scad file using an encryption program and copy it over to the usb device when you want to take it with you. This would again be vulnerable if the computer is not secure while you are working on the code or if you use weak passwords or no passwords when encrypting your files.

@@CharthuliusWheezer I ended up finding a foolproof security system Obviously I cannot go into any details. Except to say I had to stop everything I was doing and just concentrate on this for 2 weeks , it is more complex that it looks at first ( there are 5 steps to securing and 5 for releasing ) I am happy I took the time to do this . My advice is to clear your calendar and just work on security till you have a fool proof system.

You are correct, the inputs to the function can be specified either by order or by referencing them by name. So cube([1,2,3], true); is the same as cube(size=[1,2,3], center=true); or cube([1, 2, 3], center=true); but the parameters that are ordered must come first ie. cube(size = [1, 2, 3], true); does not work correctly.

I'm not entirely sure what you mean. You can use an "if" statement to change what code is running depending on the time variable ($t). ie. if( $t < some_time ) { thing_one($t); } else{ thing_one($t); thing_two($t); }

@@CharthuliusWheezer i solved it with ' function= (condition)? Yes:No; And worked For me

You could, it would just take some more work to determine how the points are ordered to create the faces. Essentially it's easier to use the hull module. One thing to note , however, is that, depending on how you use polyhedron, you could run into issues where two objects share an edge, which is not allowed and would cause manifold issues.

I'm not sure I understand exactly what you mean. If you mean the distances between different points on an object you are importing I have to say I don't know a way to do that. There is a way to resize an stl with the resize function so that the x y and z dimensions are known. You can read about it here : en.wikibooks.org/wiki/OpenSCAD_User_Manual/Transformations#resize There is also a way to find the bounding box of an object although it doesn't always work : en.wikibooks.org/wiki/OpenSCAD_User_Manual/Commented_Example_Projects

@@CharthuliusWheezer If you put one of the dimensions, I guess it can adapt the rest itself

In 2023 you could use PrusaSlicer's measuring tool on exported STLs. I believe it's available from version 2.6 but I may be wrong