Axel

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  • in reply to: Background Images in v.310 (324) #44026
    AvatarAxel
    Participant

    Hi Terry,

    thank you again. This is a way I tried once, only to see if the offset table I prepared really works. And it worked. I did not bother to start creating the hull, but I saw by the structure of the points from a distance that it looked right. The next step was to add surface by surface and then fairing until the hull was properly built. I usually do have WLs, buttocks and stations on drawings, then I can also use another software, but as soon as I cannot get a proper full set of lines I use delftship but haven’t used it for long, so I had this trouble with the background image adjustment.

    Delftship seems to be really nice when you even have a GA plan only and pictures of the hull, so you can define some rough control points along the outlines and then start shifting the points to the appropriate shape. Of course it needs a while and you need some ideas how the hull shape is in real, therefore is good to have pictures of the original hull which on historic ships is not so easy.

    Cheers,

    Axel

     

     

    in reply to: Background Images in v.310 (324) #44023
    AvatarAxel
    Participant

    Hello Terry,

    many thanks for your input again. This guideline is really helpful. I set up the arrangement completely from scratch and that was the difficulty with trial and error until I got the image correctly aligned to the size fitting on AP and FP (in the top/bottom view due to missing FP/AP marks, rest was ok). Using a parent hull I thought makes more mess than doing all from scratch. It is maybe compared to reading and do corrections on someone’s text than rather writing it from the beginning by yourself ๐Ÿ˜‰ I am presently creating the hull using a body plan view without waterlines and buttocks and from scratch. But I will also try with the basis of a parent hull and setting up the desired intersections for the image adjustment.

     

    Cheers,

    Axel

     

    in reply to: Background Images in v.310 (324) #44019
    AvatarAxel
    Participant

    Hello Terry,

    thank you. That’s tricky with the stations, I was aware of that feature but did not think about trying it in the beginning before modelling a hull, just for the purpose of scaling the image. No question, the new image editor is nice, an undo button there would be great but this is something for the feature request in the other site of this forum. If the developers could make it possible to see the red AP and FP line in the top and bottom view and a margin line of the beam which we entered before starting at all would be also very handy. Your last point sounds logical. It is also good that they separated the image editing from the main tools windows.

     

    Cheers,

    Axel

    in reply to: Background Images in v.310 (324) #44016
    AvatarAxel
    Participant

    Hello Terry,

    thanks for your reply and help. I see that the profile (side) view of your project looks same as mine. Also in the 3D view of the background editor it’s ok, since the FP and AP marks are visible. There it is possible to scale and adjust the image to the FP/AP marks. But in the front and aft view (3D background editor) the draft mark, center line and base line are visible which is also fine since I can scale it along these lines. The problem is in the top/bottom view where only a center line is visible. There should be the FP and AP marks at least as a reference. How is it in your project? Do you have the AP/FP in top and bottom view?

    It would be also fantastic if the control points can be seen in the background editor to have reference points for scaling. Otherwise it’s a hell of a trial and error until I found the image is adjusted and scaled properly.

    Best regards,

    Axel

     

    in reply to: Background Images in v.310 (324) #44009
    AvatarAxel
    Participant

    And, in the normal Home tab I can even not see the FP/AP and any beam marks in the top/bottom view. But at least the control points are visible which I set at the beam and AP/FP position.

    in reply to: Background Images in v.310 (324) #44006
    AvatarAxel
    Participant

    Hello,

    I would like to continue on this topic. I use the latest version built 331. Background image editor 3D view: in the top/bottom view I cannot see any markings of the AP and FP, any lines that show the beam are also not visible. In the front/aft view the beam is also not marked. In all views the control points are not visible. All these markings are really vital to properly position and scale the background image. In the older versions I remember it was possible to edit the background image (scale and move) in the normal Home tab. Did I forget to activate or did I overlook anything that makes these items visible in the background image editor?ย 

    Thanks,

    Axelย 

     

     

     

     

    Attachments:
    in reply to: Hull Modelling with stations only #39485
    AvatarAxel
    Participant

    Hi! Many thanks for these steps how you got to the good result! I think I can try it the same way. Good to see such tutorial as a guide ๐Ÿ™‚

    Cheers,

    Axel

    in reply to: Hull Modelling with stations only #39467
    AvatarAxel
    Participant

    Very odd and uncommon, then is better to have the station arrangement on a top view as shown there or you align the stations according to the outline if no station markers.

    in reply to: Hull Modelling with stations only #39464
    AvatarAxel
    Participant

    Hi Icare,

    thanks for the input again and well what you mentioned to Maryak, correct, an odd distance is not common and if it happened you can adjust it on the forcastle outline.
    Looking forward seeing your screenshots ๐Ÿ™‚

    Cheers,
    Axel

    in reply to: Hull Modelling with stations only #39462
    AvatarAxel
    Participant

    Commonly, if you have a bodyplan with the transversal section from a shipyard, it is divided always in the same distance based on the LPP. As you said, fore and aft part is rather complicated designed hence they sub-divide the stations by half, but always the exact distance.
    If you have a final framing plan where all frames are shown (can be 200 or more depending on the vessel’s length) then you have to stick with the frame distances shown on each general arrangement plan.

    But as above mentioned, the bodyplan for initial construction of a hull, they have either 10 or 20 stations with same distance (and fore / aft half stations or even quartered) I guess this is why they call it stations and not frames, because frames are rather on the final framing plan which indeed show each single frame in shape.

    Cheers,

    Axel

    in reply to: Hull Modelling with stations only #39461
    AvatarAxel
    Participant

    Hi Icare,

    thanks for your explanation or brief tutorial how you did. It does not sound completely clear, but not weird at all ๐Ÿ˜†
    So I will try to get it same way..

    Cheers,

    Axel

    in reply to: Hull Modelling with stations only #39457
    AvatarAxel
    Participant

    Thanks! What I mean is, I use a bodyplan with transversals only as a background image. Would that be possible to build a hull from that only? I saw tutorials which all have full linesplan with buttocks and waterlines as well as the transversal bodylines.

    in reply to: Question – starting here #39078
    AvatarAxel
    Participant

    Hi,
    thank you! These are part of the control net and you ca control the lines by it, but I haven’t figured out how to draw a model from scratch. I think this is the basis I need at least to start with, the outlines of a hull. That second line from top defines a knuckle line on that example model from the download database.
    Not that easy to start with Delftship. It is totally different than working with a NURBS program, but here you will have much smoother hulls if you do it right I guess. I think once understood how Delftshp works it is not that difficult to construct a hull.
    Cheers!

Viewing 13 posts - 1 through 13 (of 13 total)