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Reference Guide |
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Scales and tick labels for a projected view, the REve counterpart of TEveProjectionAxes.
In kValue mode the ticks sit at round numbers in the original space and are placed at their projected positions, so under a non-linear projection their screen spacing is uneven. The projection exists only on the server, so the mapping from original to projected coordinates is done here and the ticks are streamed in projected coordinates. The client maps them to the screen, which for the orthographic camera of a projected view is affine.
The tick set covers fRangeFactor times the projection manager's extent. The client discards ticks outside the view and labels that overlap, so zooming and panning need no server round trip. Ticks are recomputed only when the projection or the scene extent changes.
The projection manager is held as an aunt and is not owned.
Inherits REveText for its style: font, size, hinting, weight and text colour apply to the labels, and the line colour to the ticks. fText, fPosition, fMode, fResizable, the alignment and the frame are not used.
