Q. 浚渫船の表示機能について(Dredgepack Shapes in the Profile Screen)[英語]


A recent development in Dredgepack is the ability to show the shape of the vessel in the Profile window. This image (right) was captured during a recent visit to the Dredge George McWallace. There are several items displayed here. In the Profile there are two sections. The section to the left is the view looking forward through the dredge. The arm of the suction is displayed. In this case the suction was a 30 foot wide dustpan dredge. The section to the right is the view looking across the path of the dredge or perpendicular to the vessel. In the perpendicular view the operator has the ability to see what material is ahead of the dredge.

The distance that is viewed in these windows are set by the operator in the Profile window setup menu.

In the next image we have a Degroot Cutter Dredger CZ 400. The plan of the dredge was scanned and forwarded to Coastal Oceanographics. The image was taken and cleaned so that small details are removed. This is because in a large drawing a small detail is nice but when the image is reduced to the size drawn below, the detail makes the image appear blurred. As the image below shows, enough detail was left to make the dredge readily identifiable to anyone that has worked on this type of dredge.

Also the plans of an Ellicot 370 were sent as part of a current project. This is the image from the Ellicot dredge. Most of the detail is removed to make the image appear clean and then colored in to enhance the display.

To change the image that is displayed in the Profile window the user is required to modify a configuration file. Configuration files are also known as ini files. This should sound familiar to anyone that has used an earlier version of HYPACK®. HYPACK® Max 2.12 includes a shapes folder where the BMP images and the associated configuration files are stored.  Included in the shapes folder are images for the Default shape, Degroot dredge and an Ellicot 370.  The current version of Dredgepack supports several items in the Profile window for the differing types of dredges. It is possible to show the Cutter Suction, Hopper Left, Hopper Center and Hopper Right. For every mobile with depth the user has a Profile window. That is why there are so many Hopper displays.

The next display is the Profile setup. The items on this display have been highlighted to show what applies to the Profile view.

The Paintshop Pro program was used to modify the shape image.  Any graphics program that works with bitmaps can be used.  The nice part of Paintshop is that the actual pixel position of the cursor is displayed. This is important for modifying the configuration settings.

A sample of the data that is stored in the configuration file is shown below. This data is modified to properly display the shape in the window. The same data is in the configuration file for the perpendicular and forward looking files. The file to modify the perpendicular view is the …prof.ini file and the forward view is the …cross.ini file. The "…" should be the cutter or hopper as the case may be.

Level is the water level on the image. This is where 0 will be.
Arm X is the distance from the left edge of the bitmap in pixels to the point the arm attaches.
Arm Y is the distance from the top edge of the bitmap in pixels to the point the arm attaches.
BMPFile is the image to display.
By modifying these items the Profile window can be adjusted to display a custom shape corresponding to any dredge.

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