Automatically generate NAPA patch model

Discussion in 'Software' started by bingli, Jan 7, 2020.

  1. bingli
    Joined: Jan 2020
    Posts: 5
    Likes: 1, Points: 3
    Location: China

    bingli Junior Member

    Hello every one,

    Good day!
    This article is about NAPA, and the generation of NAPA patch model.

    NAPA is popular in ship design industry, however, we spend most of our time to describe the ship as stated in the software's user manual:
    Now we have developed a software and an interface to automatically generate NAPA Macro which can be directly executed and run in NAPA to generate NAPA patch hull. It takes only several seconds to generate a NAPA hull even if you are not familiar with NAPA at all.

    The following are two ships I have tested :

    01: KCS ship:

    Hull (IGES file) displayed in Rhino:
    标准船模曲面 犀牛.png

    Software and interface to generate NAPA Hull
    线型建模.jpg

    Hull Surface displayed in NAPA:
    NAPA曲面.png

    Hull Surface displayed in NAPA with control points and patch:
    控制点和曲线.png

    02: Boat

    a auto-generated boat hull
    3分钟创建NAPA船体模型.png

    Now I am still testing our software, if you have any requirements please feel free to let me know.
    Maybe we can further cooperate and do something interesting together.

    The IGS file and NAPA macro file for KCS ship please see the attachment.
     

    Attached Files:

  2. pafurijaz
    Joined: Dec 2016
    Posts: 118
    Likes: 14, Points: 28, Legacy Rep: 18
    Location: Italy

    pafurijaz Senior Member

    Hi I checked your hull, but has some errors and is impossible join the surfaces into one, here in the attached image is visible the overlapping of the igs model.

    Hull_errors.jpg
    Hull_errors_02.jpg
     
  3. bingli
    Joined: Jan 2020
    Posts: 5
    Likes: 1, Points: 3
    Location: China

    bingli Junior Member

    Dear Sir,

    Thanks for your feedback.

    The igs file is from the website:T2015 Workshop https://t2015.nmri.go.jp/

    It is not a perfect hull indeed and actually have some errors as you mentioned.

    For my software I only need those hull lines, I do not directly use the igs file as an input, and I have written some codes to cut the surface so as to get hull lines.
     
    pafurijaz likes this.

  4. pafurijaz
    Joined: Dec 2016
    Posts: 118
    Likes: 14, Points: 28, Legacy Rep: 18
    Location: Italy

    pafurijaz Senior Member

    thanks, I thought also the IGS file was generated by your software, anyway it generates an excellent surface from what I see in the orange shaded image.
     
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