Chain Offset Contour

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22 minutes ago, JKLINE said:

If you create a box around all the geometry, and use 'area' upon selection, everything turns out correctly 

I don't see a way to capture area as a chain.             System.Console.CursorLeft? 

I'm sorry, I don't understand the question

[JKLINE]

In your earlier post, you said I can not get the outcome I desire because they are not closed chains.

That gave me the idea of using the 'area' method in the Chain Selection UI. (Inside a bounding box).

Since there's no 'area' method in the ChainManager, I'm thinking I could automate the user input portion.

ex. Hotkey "a" then Mouse.LeftButton = pressed

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32 minutes ago, JKLINE said:

In your earlier post, you said I can not get the outcome I desire because they are not closed chains.

That gave me the idea of using the 'area' method in the Chain Selection UI. (Inside a bounding box).

Since there's no 'area' method in the ChainManager, I'm thinking I could automate the user input portion.

ex. Hotkey "a" then Mouse.LeftButton = pressed

There is an area member of chain, if its a closed chain

You can attempt to convert your open chains into closed chains by drawing a line from the first and last endpoint, which would give you a closed chain you could use to get a direction, see drawing

public : property double Area { get; }
    Member of Mastercam::Database::Chain

Summary:
Gets the area within the chain, assuming it's closed.

 

[JKLINE]

That is definitely a clever idea! FirstID & LastID with isFlipped, add it to a list and then later delete it. Very clever indeed.

Thank you

[Roger Martin from CNC Software]

Quote

Since there's no 'area' method in the ChainManager,

In the NET-Hook API there is a Area property on a Chain

Chain.Area Property
Gets the area within the chain, assuming it's closed.
Namespace:  Mastercam.Database

public double Area { get; }

 

Edited December 9, 2022 by Roger Martin from CNC Software

[JKLINE]

I was more interested in selecting an area for the chaining portion.

GetMultipleGeometry() -- but have it select instead of prompt

 

 

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Just get the entities in the chain then get the bounding box of the entities & see if it falls inside the area you want, 

After re-reading your post I think this is what you are after 

 

Mastercam::IO::SelectionManager::BoxSelectGeometry(System::String^, Mastercam::Database::Types::GeometryMask, Mastercam::IO::Types::BoxSelectionType)

[JKLINE]

Solution.

It's about as ugly as it gets. 

            void offsetCutchain80(){
                var commonParams = new BoundingBoxCommonParams { CreateLinesArcs = true };
                var rectangularParams = new BoundingBoxRectangularParams {ExpandXMinus = 2.0,ExpandXPlus = 2.0,ExpandYMinus = 2.0,ExpandYPlus = 2.0};
                var boundingBox = Mastercam.GeometryUtility.GeometryCreationManager.RectangularBoundingBox(commonParams, rectangularParams);
                var boundingBoxChain = ChainManager.ChainGeometry(boundingBox);
                GraphicsManager.FitScreen();
                void SendLeftClick(int posX, int posY){
                    Cursor.Position = new Point(posX, posY);
                    mouse_event(MouseEventLeftDown, 0, 0, 0, new System.IntPtr());
                    Thread.Sleep(100);
                    mouse_event(MouseEventLeftUp, 0, 0, 0, new System.IntPtr());
                }
                new System.Threading.Timer((x) => { GraphicsManager.SetFocusToGraphicsWindow(); }, null, 1000, Timeout.Infinite);
                new System.Threading.Timer((x) => { SendKeys.SendWait("{A}"); }, null, 2000, Timeout.Infinite);
                new System.Threading.Timer((x) => { SendLeftClick(1200,600); }, null, 3000, Timeout.Infinite);
                new System.Threading.Timer((x) => { SendKeys.SendWait("{ENTER}"); }, null, 6000, Timeout.Infinite);
                var selectedCutChain = ChainManager.GetMultipleChains("");
                foreach (var chain in selectedCutChain){
                    foreach (var t in boundingBoxChain){
                        if (chain.Area != t.Area){
                            chain.Direction = ChainDirectionType.Clockwise;
                            chain.OffsetChain2D(OffsetSideType.Right, .0225, OffsetRollCornerType.None, .5, false, .0001, false);
                            GraphicsManager.ClearColors(new GroupSelectionMask(true));
                        }
                    }
                }
                foreach (var entity in boundingBox){
                    entity.Retrieve();
                    entity.Delete(true);
                }
                GraphicsManager.Repaint(true);
            } 
            offsetCutchain80();
            return MCamReturn.NoErrors;

 

[JKLINE]

Ever seen anything like this? I've ran out of debug ideas 

Original geo is the white line. Chained it and offset with OffsetChain2D both directions.

Input chain has 4 entities, meanwhile one of the results has 5 entities and the other has 6 entities.

I've verified that the chain going into the OffsetChain2D method has only 4 entities. I've also offset the chains by hand and that worked as intended. I extracted the geometry to a fresh Mastercam file and ran only the OffsetChain2D method on it and it worked as intended. Meaning my code works and the geometry isn't the problem.

Why would my result have more entities than the starting chain?