[Up: Auxiliary]

Clipping


Independent of whether the grid is on or off, FeynGame will do additional kinds of clipping when objects are moved by mouse or curved by mouse wheel:

Vertex clipping. If the end of a line is moved closer to another line (or to its other end) than a certain minimal distance, it will be connected with that line through a vertex.
Curvature clipping. If the curvature of a line is decreased below a certain minimal value via the mouse wheel, it will be set to zero. Angle clipping. If the slope of a straight line is close to a multiple of π/2, it will be replaced by that multiple of &pi/2;. Via the menu item Edit > Clipping angles or by repeatedly pressing "c", that value can be changed to π/4 or π16, or zero.

This kind of clipping is introduced for the user's convenience, because otherwise it would be rather clumsy to connect lines, or to turn a curved line into a completely straight line. In order to overrule such clipping, one can use EditFrame to do a pixel-wise modification of the position or the curvature.