07-06-2018, 01:54 AM
Suppose I have a programmatically constructed 3D model containing some geometries that tessellate together.
I'm retrieving data from a SQL Server database as WKT from geometry-type fields, getting the co-ordinates, creating List<Point> objects, extruding them, then performing subtractions based on chronological order.
The "Slice" related methods in Ab3d.Utilities all deal with returning 3D data that exists in front of and/or behind the plane in question, which gets me part-way where I want to go, but what I'd really like to do is return a 2D representation of the geometry that exists at the exact location of the plane. A zero-thickness slice, if that makes sense.
E.g.
Start with a shape having a recess.
[Image: https://i.imgur.com/LavF8XW.png]
Add a shape that tessellates into that recess.
[Image: https://i.imgur.com/kNzYLOo.png]
I need to select an arbitrary plane (elevation planes in my application)...
[Image: https://i.imgur.com/FH4ylVf.png]
...and get back a list of 2D geometry based on where the 3D geometry cross the plane.
[Image: https://i.imgur.com/9vwed7s.png]
Ideally the result is a collection of 2D shape objects that contain references back to the original 3D objects. I have a custom class that extends ModelVisual3D and stores metadata from the SQL Server database about what the shapes represent.
Any ideas?
I'm retrieving data from a SQL Server database as WKT from geometry-type fields, getting the co-ordinates, creating List<Point> objects, extruding them, then performing subtractions based on chronological order.
The "Slice" related methods in Ab3d.Utilities all deal with returning 3D data that exists in front of and/or behind the plane in question, which gets me part-way where I want to go, but what I'd really like to do is return a 2D representation of the geometry that exists at the exact location of the plane. A zero-thickness slice, if that makes sense.
E.g.
Start with a shape having a recess.
[Image: https://i.imgur.com/LavF8XW.png]
Add a shape that tessellates into that recess.
[Image: https://i.imgur.com/kNzYLOo.png]
I need to select an arbitrary plane (elevation planes in my application)...
[Image: https://i.imgur.com/FH4ylVf.png]
...and get back a list of 2D geometry based on where the 3D geometry cross the plane.
[Image: https://i.imgur.com/9vwed7s.png]
Ideally the result is a collection of 2D shape objects that contain references back to the original 3D objects. I have a custom class that extends ModelVisual3D and stores metadata from the SQL Server database about what the shapes represent.
Any ideas?