This section contains general information about system wide parameters:
The Atlantis projections (except the φ/η projection) are chosen in such a way that detector volumes do not overlap. Therefore, one can replace transparent wire frame images by filled areas surrounded by frames, which are easier to perceive intuitively. The fill colors of the various detectors and of the background may be modified.
N.B.:
Small points, lines or cells are better distinguished from background with high intensity contrast. The intensity I of colors can be very roughly estimated, by:
I = 4×Igreen + 2×Ired + b×Iblue with b between 0.5 and 1.
N.B.:
Blue or magenta backgrounds change colors of very small objects: yellow to white, green to cyan and red to magenta.
When printing on normal quality color printers it is advisable to avoid muted colors for areas onto which small objects are drawn. Therefore printed files have their own color set, which takes this into account. Print colors may therefore be different from display colors.
N.B.:
The background color of the φ/η projection (5.2 φ/η Projection) is controlled by the projection and may be modified there.
In general point-like hit data are displayed as symbols which may be chosen from
filled square
horizontal line
vertical line
plus
and drawn with a size determined by the symbol size.
Tracks and non-point-like hit data are displayed as lines with a selectable line width. For non-point-like hit data (e.g. TRT) under certain zooming conditions it is possible for the two ends of the line representing each hit to be separated by very small distances, i.e., less than one pixel on the screen. In such cases hit data may not be visible if drawn as lines. To avoid this situation a MinSize may be specified such that if all the lines from a given detector have a length in screen coordinates (pixels) smaller than MinSize then the data from this detector are drawn as symbols (squares by default) with a size MinSize. Furthermore the user may force non-point-like hit data to be drawn as symbol with size MinSize using Force Symbols.
For noise hits, where noise hits are those which are not connected to simulated or reconstructed tracks (and in the case of S3D hits are ungrouped by the filter), either a special noise symbol with a special noise size or a special noise width can be selected. By default unconnected or ungrouped hits are white and not easy to distinguish from yellow hits. It is easier to distinguish noise and yellow hits when a different symbol for noise hits is set.
To better distinguish hits from tracks of the same color or from a colored background, they may get a frame, where the color can be selected, with a frame width which can be modified.