Measuring tool

[bb1950328]

A tool to measure various distances can be very useful. The user selects two points and BrickSim outputs the distance between them. These points can be:

• Edges
• Triangles
• Center of axle holes, studs or other circles

Algorithm to get the point under the mouse probably will be something like:

1. Get the etree::Node under the mouse using the selection buffer
2. Cast a ray and check for intersections of LdrTriangles or LdrLines or primitives like studs
3. Display the currently chosen point so the user sees what he will be clicking.

And angle or area measurement can be useful too. The possibility to restrict the measuring to one or two dimensions would be nice too (for example to measure the X difference between two points without taking Y and Z into account)