есть такая прога Rhino, к ней есть дополнение Marine design, прога позволяет создавать чертежи корпуса в различных плоскостях, а также обьемную модель корпуса. но есть одна проблема - она платная.
есть и другая прога Carene, она бесплатная но попроще чем Rhino
Carene хорошая программа, сам пользовался для постройки лодки:
Можно легко спроектировать отроскулый корпус, прикинуть водоизмещение, осадку. Но, по мне, Карене больше заточена для лодок, а не для судов, есть ограничения на форму корпуса.
Кстати, FreeShip легко импортирует кареновские файлы.
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