Selecting origin plane and two points

[Anonymous]

Is there a way to turn on the selection command from a python script, so that the user is asked to select a plane and two points? What I want to achieve is very similar to the flow for rectangle, but instead of rectangle I need my script to consume the two points for something else.

Is this possible?

[BrianEkins · Accepted solution]

You'll need to create a command.  This is described here.  In the case you described, you don't want selections.  A selection is a user picking an existing entity.  In your case, you just want to them click to specify a location on the screen.  You can do that by listening to mouse events and getting the mouse position when a click event happens.  Mouse events are accessed through the Command object.

[dikovm]

One follow up question, since I have not worked with mouse events. How can I convert the  click location into 

Point3D?

[BrianEkins]

Unfortunately, this isn't very straightforward.  We should have had the click event return a default 3D point.  The problem is that you're clicking on a 2D plan to specify a point in 3D space.  This means that really you're specifying a line that goes from the click point into the model and any point along that line is potentially valid.  The API is currently returning the 2D click information.  It's possible to use this along with camera information from the view to compute the direction of the bore line and then you would need to intersect that with whatever is defining the plan or surface of selection to get the actual 3D point.

[Anonymous]

Yes, I came to the same conclusion. So I decided to calculate define the points relative to objects in the model.

[kandennti]

Hi mdikov.

In the past, using MouseMoveEvent and BRepFace
I have created sample code that displays the 3D coordinates of the mouse cursor in real time.
(But it is Japanese)

http://kantoku.hatenablog.com/entry/2018/06/04/191443

It may be helpful for MouseClickEvent.

[MichaelT_123]

Hio Kandennti-san,

Howevero youro ideo iso brillianto.

MichaelTo