Terrance Egolf

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  • in reply to: Adding a Fillet of a set radius between two surfaces #44254
    Terrance Egolf
    Participant

    Hello, Hull.01.

    I don’t believe the construction you are seeking is possible using DELFTship because it uses a subdivision process to create the hull surface. In other words, the surface is mathematically interpolated in 3D space using the positions of control curves. To transition from a planar to a cylindrical surface at the edge of a fillet results in the departure from a plane before the juncture and/or the deformation of the cylindrical fillet surface.

    Here are the two possible scenarios in DELFTship:

    1. Use a crease edge at the juncture with a cylindrical cross section for the fillet. The surface shows a sharp break at the crease edge (these images used a 12-point cylinder).

    Fillet-12-Point

    2. Removing the crease edge, using a 12-point fillet cylinder:

    Fillet-12-point-No-Crease

    The only option you have is to increase the number of points in the fillet cylinder section. With crease edges at the joint between the plates and the cylinder section, you can approach (but never achieve) a smooth tangent with the fillet surface (this one is based on a 24-point cylinder).

    Fillet-24-point

    Hope this helps.

    Terry

    Attachments:
    in reply to: Layers Bug #44226
    Terrance Egolf
    Participant

    Yes, and the Layers dropdown is no longer limited to 10 entries!

    Thank you from those of us who create a layer for every little widget! 😕

    Terry

    Attachments:
    in reply to: Attachment functionality fixed #44225
    Terrance Egolf
    Participant

    Bravo!

    Much appreciated!

    I noted yesterday—briefly—that the attachment size had been increased to 1 Mb, but now has reverted back to 512 kb. Any chance of the larger attachment size?

    Terry

    in reply to: a cusp between two sides #44171
    Terrance Egolf
    Participant

    Iggy wrote:

    But now, an inverse question arises… Can you divide this smooth (non-symmetric) surface into two halves in such a way that the tangents stay smooth?

    The short answer is ‘no.’ The program is not able to simply “disappear” the right half of a nonsymmetrical object in either the viewport or in the lines plan. If you try to split the nonsymmetric deck object in half, you reintroduce the centerline crease edge, and then you are back to where you started. Crease edges always create tangent-discontinuous surfaces, no matter where they are located (page 19 of Manual_13_mc0.pdf).

    I would suggest just living with the deck and any other objects that need to be ‘nonsymmetrical,’ then deal with them in the lines plan when it comes time to create your half-hull plans.

    The lines plan can be exported as a 2D DXF file. Most modern 2D CAD programs can import these DXF files as vector polylines. (I use CorelDraw.) With care, you can delete the unwanted far side of the nonsymmetric objects when cleaning up the plan image.

    Hope this helps. If anyone reading this can add to or correct this response, please do!

    Terry

    in reply to: a cusp between two sides #44168
    Terrance Egolf
    Participant

    And, as usual, the image file didn’t attach…

    in reply to: a cusp between two sides #44166
    Terrance Egolf
    Participant

    Hi Iggy.

    The ridge or cusp you see is the result of the crease edge at the centerline of the model. It is almost impossible to create a smooth tangent at the crease edge with viewing the model with Both Sides selected in Hull Display.

    If having a smooth foredeck is important, I suggest building the entire deck as a non-symmetrical object on its own layer. That way you can eliminate the crease edge along the centerline.

    To avoid rebuilding the right side of the deck, you can use the program’s Mirror feature:

    1. Select all the faces that make up the deck and assign them to a new layer in the Layers Menu Group on the Home Ribbon. I suggest renaming the new layer “Deck” or something meaningful to you.
    2. In the Layers Edit window, first uncheck the Hydrostatics check box for the Deck layer, then uncheck its Symmetric checkbox. Then click Accept.
    3. Turn off the visibility of all layers other than the Deck layer in the Layers dropdown list.
    4. With the Control Net visible, select the entire deck object so that everything is highlighted yellow.
    5. Switch to the Tools Ribbon, then click on Mirror in the Transform Menu Group. A dialog box will appear.
    6. In the 3D Mirror plane section of the dialog box, click on the Vertical Plane radio button. This mirrors an object across the vertical longitudinal plane. Verify the (offset) Distance is 0.0, and the “Connect to existing points” checkbox is checked.
    7. Click OK to create the right side of the deck.

    Most of the time this will create the right side of the object connected to the original left side. However, if there is some extra edges that weren’t connected properly in the original object, then the two sides won’t be connected along the centerline. If that happens, you will have to delete faces (one at a time is best) at the centerline and then manually connect the adjoining faces to obtain an interior edge along the centerline.

    When the two sides have been joined properly, the deck surface should form a smooth camber from side to side.

    I used this technique to create a smooth elliptical coamings for my model of a c. 1905 naphtha launch. The hull is on a symmetrical layer while the coamings are not.

    Hope this helps.

    Terry

     

    • This reply was modified 2 months, 2 weeks ago by Terrance Egolf. Reason: Image didn't attach
    in reply to: Making angles in a tube (cilinder) #44160
    Terrance Egolf
    Participant

    Hi ketelbinkie.

    This forum’s web client is pretty broken, so I won’t even try to post images in my response. If you want to contact me directly by email so I can share some useful images, please use the address I included in my response #44109 under the topic “Introduction of a newcomer!” on May 3, 2021 at 15:18.

    Here goes:

    I assume you have created a cylinder for the rail using the 3D primitive tool found on the Tools Ribbon (located all the way to the right on the ribbon). It should be oriented parallel to the X-axis of the model.

    Next, using the same start and end radii used in the railing cylinder, and the number of points (6 is the minimum—I usually use 12—but the number of points has to match), orient the new cylinder’s Startpoint and Endpoint parallel to the y-axis. This means you only change the middle set of coordinates (the Y-coordinates) for each point in the Cylinder dialog. The other Startpoint and Endpoint coordinates remain the same. I would enter the Startpoint Y-coordinate at, say, 10 feet or 3 meters, and the Endpoint Y-coordinate at, say 9 feet or 2 meters (the actual numbers don’t matter at this point in the process—the second number should just be smaller than the first). Then click OK.

    When the new cylinder is visible, it should be perpendicular to the railing cylinder. You may have to select and drag it to the vicinity of the railing cylinder to help make the connection.

    Next, you will have to cut matching 45-degree bevels in the corresponding ends of the rail cylinder and the new one you just created. This will require creating an X-Z or Y-Z vertical plane that is placed on a separate layer from the other geometry visible in the model. (I usually call this the Auxiliary layer—use the Add button in the Layers Menu Group to create a new layer.) The vertical plane needs to be large enough to completely intersect the cross-section of the cylinders when rotated to make the cut.

    Using the Rotate Transform on the Tools ribbon, rotate the vertical plane so that it swings 45 degrees around the Z-axis. (There isn’t enough space or time to describe how to do that in this post! Email me for instructions, if needed.)

    After rotation, move the plane so that it completely intersects the new cylinder near one end. It MUST intersect all the side edges of the cylinder for the intersection to work.

    Go back to the Home Ribbon and click on the Intersect button in the Point Menu Group. For the “Insert new points in” box, select the layer the cylinder is in. For the “Find intersection with” box, select the layer the Auxiliary cutting plane is in. Click OK to insert the new points and edges in the cylinder. If it works correctly (many times it doesn’t!), there should be a new edge oriented at 45 degrees from the axis of the cylinder. Important! ESCAPE TO DESELECT ALL EDGES. Then delete the unwanted faces to create the 45-degree bevel.

    Repeat this process for the railing cylinder (assuming it is exactly parallel to the model’s x-axis). Delete the appropriate faces to match the short cylinder’s bevel.

    Select and drag the short cylinder over to the railing cylinder, and align it perfectly to the corresponding edges and control points along the bevel.

    Making sure that both cylinders are assigned to the same layer, delete (only) one of the adjacent faces on one of the cylinders, then rebuild it by connecting to the other cylinder’s corresponding control points. Repeat until all the faces are joined at their shared edge.

    When you are finished connecting the two cylinders, make sure that the edge defining the bevel joint is turned into a crease edge so that the bevel forms a sharp corner.

    Sorry that this explanation is so long-winded. If there is an easier method to do this, I hope someone else jumps in to provide it.

    Terry

    P.S. For the moderators, videos demonstrating how to rotate objects and to create intersections would be good topics.

    in reply to: edges turning pink…sometimes #44151
    Terrance Egolf
    Participant

    Hello, Iggy.

    I am by no means an expert on these things but I do use the program on a regular basis for a ship-modeling project.

    Where I have found persistent crease edges to occur is when the new surface just created does not share the existing edge but is actually parallel to it. This can happen when the new surface uses a control point not on the original creased edge. You can often detect this problem by zooming in on either end of the edge you are trying to un-crease to see if there are actually two points at one end or the other, or there are two parallel edges close together.

    Another issue is that, occasionally, after creating the new surface, the edge will not automatically un-crease. To correct this, select the edge and click on the unlabled Crease button in the Edge menu group on the Home ribbon. If the edge doesn’t un-crease, then the first situation is likely the problem.

    Hope this helps.

    Terry

     

    in reply to: Introduction of a newcomer !… #44133
    Terrance Egolf
    Participant

    Fernando said: “Looks like you have to do this for every view (profile, plan, body plan) individually.”

    As far as I know, yes. I think an earlier version allowed you to import the different views from the same source diagram and you could designate them as the same scale. That sometimes worked and sometimes not. And you still had to position them properly.

    I think after you practice with the new Background Images (or Reference Images) feature a few times, you will see that this method is actually easier and more reliable when using a good set of quality images. (This latter issue is one of the topics I address in my tutorial.) I’ve built several models in the past 6 months, and this feature is much faster and less frustrating than the earlier methods. It usually takes me less than 5 minutes to import and size the image accurately. Since the final model depends on getting the reference images right, this isn’t wasted of time.

    Terry

     

    in reply to: Introduction of a newcomer !… #44126
    Terrance Egolf
    Participant

    Hi Maarten.

    “Pictures are worth a thousand words.” Good videos are worth 10,000 words.

    I think these videos would be useful. In the Model Ship World forum, our members are frequently seeking information on various aspects of DELFTship that could be explained in such videos.

    I have a few comments about this one that might help:

    First, I learned that you can precisely set the coordinates for the reference point in the 2D viewer by clicking on it. I don’t think this is mentioned in the manual.

    Second, the video combines actions with instructive text that (for me) moves too quickly through the steps. I was trying to watch what buttons were pushed and missed the explanatory text at the bottom. It might be more effective if the explanatory text was displayed first, then the action was taken.

    Third, this video assumes that you already have a model to align an background image to. In my experience and those of ship modelers who are just starting a model, there is no model. It would be helpful if you could show the process to insert and resize a background image when just starting a model, and assuming the viewer is a novice user of the program. I have found aligning and resizing the image to the “main particulars” as set in the Project Settings works for me.

    If you wish, I can send you the tutorial PDFs that I created for this specific purpose to give you some ideas for other videos.

    Terry

    in reply to: Introduction of a newcomer !… #44111
    Terrance Egolf
    Participant

    Hello, Fernando.

    I would be happy to try and assist. The trick with the new Background Images feature is that after you load the new image in the Background Images menu item, there are number of things in a particular order to do:

    1. First, click on Edit in the Background Images menu item in the Home ribbon. Then select the Editor General tab, which is the default tab when the Editor opens.
    2. With the 2D viewer selected, expand the File menu item dropdown in the ribbon, then click on the image to be positioned and resized.
    3. For a profile view image, drag the little red box to the intersection of the Aft Perpendicular and the model Baseline. If image is a body view, drag the little red box to the intersection of the Centerline and Baseline. If image is a plan view, then drag the box to the intersection of the Centerline and Aft Perpendicular. This establishes the “origin” for positioning and resizing the image.
    4. Next, switch to the orange Edit tab. This window includes a thin red line with two handles. Grab the handles and position them on a known horizontal reference line in the image. Normally, this will be a waterline in a ship’s plan. You may have to add a horizontal reference line to the image in a separate 2D software. This line needs to be parallel to the vessel’s waterline.
    5. Note that if the red horizontal line is not horizontal to the model baseline, the Align button in the Rotate menu group in the ribbon will be active. Click on the button to level the image. This aligns your image to the model baseline in DELFTship.
    6. Next, click on the 3D tab above the image window.
    7. Your image will be highlighted in yellow. Select the viewport that displays the new image face on. For a profile image, this will normally the Left viewport (or it can be the Right). For a body plan view, select either the Aft or Front viewports. For a plan view, select the Top viewport.
    8. You will see eight “handles surrounding the edge of the highlighted image and one in the middle. These are used to reposition and scale the image. Also, the origin of the image (see Step 3 above) will be positioned at the origin of the model.
    9. If the padlock symbol on the selected file in the ribbon File dropdown is locked, then moving any of the outside handles will rescale the entire image proportionately from the image origin. Select a handle that is farthest from the origin for the best control. See Step 11 below for guidance for resizing the image.
    10. If the padlock symbol is unlocked, then any of the outside handles with resize the image but only in the direction you drag the handle.
    11. Resizing the image to the dimensions required by the model is most easily done by matching key lines in the image to corresponding “intersections” you have entered in the DELFTship model. Also, the types of intersections must be visible. (You can select the intersections to display in the top row of the Hull menu group in the main program Home ribbon.) You should enter the appropriate intersections in the program before scaling or positioning the image using this method. For a profile view, adjust the image to match the Fore and Aft Perpendiculars for length, and Baseline and Waterlines for the vertical height. For a body plan image, use Buttock lines for the width and Waterlines for the height; for plan views, use Buttock lines for width and Station lines for length. You can zoom in while adjusting dimensions to make sure the plan lines and intersections exactly overlap. Note that the center handle of the highlighted image can be used for recentering the image if it requires regardless of whether the image is locked or unlocked.

    If you want illustrations of the above steps, I can email my five tutorial PDFs to you if you contact me at the address I provided in my previous message to Jean-Pierre. The tutorial goes through the whole process of setting up to create a new model, with reference to the current DELFTship manual.

    Colorado Springs is a great town, especially with five grandchildren here!

    Terry

    in reply to: Introduction of a newcomer !… #44109
    Terrance Egolf
    Participant

    Good morning, Jean-Pierre.

    DELFTship should be appropriate for your projects and I would like to follow your progress in both. Since these models are left/right symmetrical, the program can display both sides while modeling only one side.

    I think this website is underutilized by both the users of the program and the owners themselves. Sometimes one receives a quick response and other times—as in your case—”all you hear is crickets,” as they say here in the US.

    I looked at Marseille website, and in particular, the related DELFTship instructions, and they seem to be no longer applicable after the DELFTship version 13.10 (324) update this past winter. If you wish, I could email you a useful tutorial on setting up Background Images using the latest version of the program. My personal email is txtbkauthor[@]gmail.com (remove the brackets). I also think communicating by email will be more effective, considering the technical issues with this forum’s programming.

    Terry

     

    in reply to: Introduction of a newcomer !… #44105
    Terrance Egolf
    Participant

    Hello, Jean-Pierre.

    I have zero fluency in French (the product of a standard 1960s American high school education), so thank you for your efforts. And it’s not our job to approve anyone in this forum. Most of us are “in the same boat,” if you will. 😕

    So, do you have any particular project in which you are interested? Have you downloaded the Free version DELFTship? Be sure to get the manual as well. The manual will introduce you to what the program can do and the many features it has, but it is a little light on explaining the process of performing various tasks.

    Feel free to ask any questions you like. You will often get a response within a day or less, especially if it is a technical issue.

    Terry Egolf

    Colorado Springs, Colorado, USA

    in reply to: Missing Control Points #44085
    Terrance Egolf
    Participant

    Since the image didn’t insert into the post, I sent a separate email to Maarten containing the screenshot and the model file to examine.

    Terry

    in reply to: Is this a bug? #44070
    Terrance Egolf
    Participant

    Maarten,

    I emailed you my response. This client will not accept images.

    Terry

Viewing 15 posts - 1 through 15 (of 41 total)