Geometry
Mirror
Mirrors along the axes, folding the frame onto itself.
Controls
- axis
- Both folds the frame twice and fills it with a quarter of the picture, large; quad fits the whole picture into each of four copies
- origin
- Which half survives the fold whole: the left and top, or the right and bottom
- offset
- Slides the mirror axis off centre. At either end of the scale it stands on the frame border and there is nothing left to fold
- angle
- Tilts the mirror axis. Half a turn covers every distinct line, so the scale has no dead tail
- contrast
- A number from -1 to 1, 0 by default.