Rhino 8 Multilayer gradual recessing - how?

Doing favor for family, learning Rhino on my own, requested project and specs shown in picture. Where can I go to get instructions for this specific project? Plan is to work the 3 different depths on 3 different levels, big question is how to GRADUALLY RECESS

if the curves are on a planar surface you can use the pushpull command then simply drag the portion in or out

I have no training in drafting or drafting terms. I don’t know what curves you are talking about. I am only dealing with the cross design to be recessed, not the column. I know what a planar surface is, but to my understanding of curves there are none within the cross design. The column itself is not involved with the recessing or the project at all.

PushPull / gumball usage with curves to create recesses:

The curves can be created with the _Rectangle command for your case.

Then select outer curve and click the small horizontal line (cut widget) on the blue gumball axis and type -0.5, hit enter. See how the first recess is made.

Then select the four inner curves (rectangles), click the cut widget on the blue gumball axis and type -1.0. You’ll see how the set of curves creates the second set of recesses.

create_recesses_with_curves.3dm (2.9 MB)

Thank you. I will try to follow the steps. I appreciate your time and expertise.

I am doing the learning lessons included in the Rhino 8 program and am on Level 1. I have run across the gumball and did the exercises with that. I have entered the _rectangle command on the outside lines but I don’t see anything happening with that command unless I’m supposed to be actually creating the lines instead of using the lines that came in with 2D design sent to me by my family. Bottom line is that I have been unable to create a recess background. I have tried to find online courses; however, udemy and domestika both have serious complaints lodged against them. Cademy classes seem to be connected with McNeels but the price is rather prohibitive as I am not receiving payment for training or even for the final product as I am doing this as a favor for family. What I am needing I guess is a step-by-step explanation of what to do or find out where to get that. In the meantime I will continue on with the included lessons and hopefully a lightbulb will go off;. Thank you for responding.

It seems to me that these instructions are to create a box then within that box create the rectangles that make up the cross but I need the design to gradually recess from no depth at the bottom of the design to 3 different depths with the outside rectangle eventually being 1/2 inch, the next line eventually going down to 1 inch, and then the last depth outlining the cross and arms eventually being 1.5 inches at the top, but all of them starting at a depth of 0 at the bottom. I don’t see how that can be done with the instructions on the create_recesses_with_curves. I was not successful in the gumball mode to do anything with the PushPull because I was unable to select a surface to push/pull. If any of this makes sense to you and you have any further suggestions for me please let me know. Thank you

I probably should have not used the PushPull word in the first message. When you read the rest of my message you’ll notice that I am talking about clicking the small line on the gumball axis, the cut line, then entering the depth to which the recess should go. The cut line is highlighted with orange:

And obviously you’ll need to add the numbers that are required for your design.

Hi Valerie,

I’m afraid it isn’t entirely clear from your brief exactly what you are looking for. I think it might be this:

Let me know if that is correct and I’ll add an explanation.

Regards
Jeremy

That is exactly the way it should look. Thank you for your help.

Thank you for explaining what the cut line is. It mentions the cut line in the level 1 training manual but I didn’t find any mention of where it was located or what it was. Thank you; that bit of knowledge helps a lot.

I have included the drawing with the measurements for the cross; height and width of the different components; depth is as previously stated. The final product that I produce must be of these dimensions. I don’t know if that will make a difference in what you are doing for me or not. I truly do appreciate you taking the time to help me with this.

Thank you
Valerie Karsjens

(attachments)

Hi Valerie,

Here is one way to get what you need. I produced the illustrations from your original post so my model isn’t dimensionally accurate to the information you have subsequently added. You shouldn’t have any difficulty producing your own work to these later dimensions though.

I’m assuming you still don’t know a lot about Rhino, but also that you are prepared to look at the tutorials and read the help file to learn how to do the basics like drawing a line of the right size, in the right place.

Start by creating a new Rhino document using one of the inches templates. Then in the front view draw the outline of the stone:

Select the outline and in the top view use the gumball to extrude it into a solid object. Click on the gumball dot and type a negative distance into the resulting field (so that the extrusion direction is opposite to the arrow):

You should get a solid stone:

In the front view, draw outlines of each of the shapes that will form the decoration. I’ve done this on different layers, using the same colours as your original diagram to keep identities clear. For the cross layer there are four rectangular outlines:

.
Select the blue outline and in the top view use the gumball with a positive value to extrude it 1/2" away from the stone. Do the same for the red outline, then the four green ones (do not try to combine the outlines from the different colours into a single extrude step as Rhino will assume that you want the inner line to punch a hole in the outer):

in the right view select all these extruded boxes:

and use the _rotate command to swing them into the stone. To do this, set the centre of rotation to the lower right corner of the blue box, the first reference point to the top left corner and the second reference point to the top right corner:

This should have made blue, red and green objects rotate. Now deselect the blue box (or deselect everything and reselect the red and green boxes) and in the right view rotate the red and green items, placing the centre of rotation at the bottom right of the red box, the first reference point at its top left and the second reference point at its top right.

Next, deselect the red box (or deselect everything and reselect the four green boxes). In the right view rotate them by placing the centre of rotation at the bottom right corner of the lower green boxes, the first point at the top left of the upper green boxes and the second point at their top right.

You should now see this in the right view:

Select the stone and use the _BooleanDifference command to subtract the blue box from it. Reselect the modified stone and use _BooleanDifference to subtract the red box from it. Reselect the modified stone and use _BooleanDifference to subtract the four green boxes from it.

You should now have this:

Note that when you are making the rotations you should have Osnaps turned on and SmartTrack off to make it easy to be accurate:

HTH
Jeremy

I have the design done and enclosed it, The dm file is to proper real-life measurements of the monument. However, I don’t have the lines at the bottom to enclose the design into boxes like on your email. Is that necessary to do and if so do I just delete the bottom lines so the design will look like what you sent (shown below) which is the way my sister needs it to look.

image.png

(attachments)

1carlcolumnvk.3dm (50.4 KB)

Hi Valerie,

To be honest, I’m not sure I properly understand the question, however…

…If you are intending to use the curves you have drawn to extrude the various shapes in my previous explanation, then each shape will need its curves to be closed boxes.

To explain what I mean, I’ve made a copy of your file and added four layers, J_0 to J_3, corresponding to the stone, the blue, red and green recesses. You can use the Layer Panel to turn these off and on one at a time to see, alongside your curves, the curves necessary to make the various extrusions. You should be able to see from these the changes you need to make to your curves.

A couple of additional hints: First, use colour to distinguish the sets of curves for each extrusion. It makes it easier to know which is which, especially where they overlap, as at the bottom of the stone. Placing each set on its own layer and utilising the layer colour, as I have done, is the easiest way to do this. Secondly, join the curves for an extrusion together so they make a closed box so that thereafter you only need to make one selection to get the complete outline. That makes it easier to select and removes the risk you might miss a curve.

1carlcolumnvk_annotated.3dm (75.2 KB)

HTH
Jeremy

Hello again,
I am now hung up on “and use the _rotate command to swing them into the stone. To do this, set the centre of rotation to the lower right corner of the blue box, the first reference point to the top left corner and the second reference point to the top right corner” The learning manual does not mention of “centre of rotation” and I don’t know what it is supposed to look like when I am done and in the
“right” view I cannot make out the different (blue, red, green) boxes.

There is a time deadline on this monument project and I am beginning to despair of being able to do it within that time frame. When the small company my sister works for bought the Rhino program, one of their employees received training in the program. Unfortunately, he has now developed fast progressing dementia and cannot remember, teach, or show anything within Rhino anymore. My sister has sent 2D drawings, pictures and instructions to the foreign company who will do the actual recessing of the cross design. However, the specifications they send back to show what they will do is not what the client wants and my sister feels that if she could just get a rendering using Rhino to them that they would then hopefully understand. My small (area population of 4,600 so limited resources) local community college is offering a beginner’s CAD class this spring and I have enrolled in it. My sister approached me and I took this on because over the years I have taught myself Adobe Photoshop, various web design programs, publishing programs and made my living with those so we thought there might be at least a chance of making this work. However, I don’t know if the intervening events of cancer and heart problems with associated chemo, radiation, pacemaker placement and heart ablation has decreased my mental acuity or perhaps just being 69 but I am finding this program to be a bearcat and the instructions leaving me with more questions and moments of “huh?”. Since I do have the program on my computer and there will be future projects that she will want done in the program, I will go to the CAD class and keep on with the learning manuals with simpler projects but this project I am afraid is out of my depth at this time.

I do appreciate all your help but I fear I must tell my sister that I am unable to do this project in the timeframe she needs. I have included the project done to the stage that I got to.

Valerie Karsjens

(attachments)

1carlcolumnvk.3dm (71.1 KB)

Hi Valerie,

I’m sorry to see you struggling with this. I understand the pressure to complete it quickly mean that you have plunged straight in, but you need to understand the basics of Rhino to begin to produce results effectively. If you are going to use Rhino further, start out with the introductory tutorials available from the Help menu in Rhino:

For example, you would then know that “centre of rotation” is a prompt that appears in the command line when you use the Rotate command (you can answer this prompt by clicking on the point you wish to rotate about). [Edit: I have, perhaps naively, assumed your Rhino is set up with English commands - if you are using a different language then of course “centre of rotation” will likely not appear. My apologies.]

In the meantime, to help you forward with your model, I have completed the extrusions and boolean subtractions for you, using the geometry supplied in your latest upload, and attach a new file with that done. I also attach a simple render of the result.
1carlcolumnvk_recessed.3dm (2.4 MB)

Regards
Jeremy

I am going through the Learn Rhino Level 1 and in English but I’m just not getting through the lessons fast enough to get this done within the time frame. Thank you for doing this, you are a blessing. I will continue working with the lessons and tutorials and learn this software. Thank you, thank you, thank you.