In order to handle the cloud points a trace lines algorithm has been developed. The same algorithm exists and in the mobile app. The editor provides extra option to define the maximum allowed distance of the real point from the theoretical line. Once the checkbox is selected, a polyline in red will be displayed in the drawing with straight segments generated by interpolating the measured points, and whose ends will be automatically connected to form the corners. This represents a simplified polyline with fewer points. The points that belong to a theoretical straight line have been removed.
Data to Use
This is automatically handed by the mobile application. Still to cover all possible scenarios of use the editor let’s the user to choose which set of points he needs. If 2dscanner is perfectly leveled the 2 set of points should be identical. There is no need to perfectly level 2dscanner since the measurements are auto corrected digitally using the accelerometer. In horizontal scans just use the corrected set of points. For inclined scans or vertical scans the raw data is needed.
Delete points that belong to a line
All the points that belong to a line will be deleted. There is no actual need for such action since in the DXF lines and points are exported in different layers. Still if the user desires he can get rid of all the points that are not needed and get a cleaner dxf file.
General information
The Trace Lines algorithm is using the Least Square statistical method to deliver the most probable theoretical line. The laser rangefinders have also a statistical error in measurements. 2Dscanner might has 2mm deviation when measuring the same spot in Normal mode. In Precision mode it is more accurate and this deviation is usually zero. Using the statistical theory in many cases the traced lines could be more precise than the scanned points.
Tips
- For demanding constructions touching walls lower the Trace Lines Max Distance and use the generated lines. Keep in mind that there is not one 100% straight wall.
- For floorplan drawings trace Lines Max Distance can be set to a large number, 20 for example, in order to give you long straight walls.