Custom Query (95 matches)

The terrain is rendered with a Z-prepass, which is supposed to achieve the desired effect.

This actually worked on my netbook running a rather ancient Ubuntu version and with a hand-built wxWidgets 2.9.5 (though the wx version seems less likely to matter), but not since upgrading it, and not on two other Debian machines I have tried.

I modified the glxgears program to use a Z-prepass, and that seems to work, so I just need to determine what's different in aven.

Currently the altitude of GPS fixes and hence of cave entrances attached to them doesn't match the altitude of terrain from DEM files very well - the difference seems to be a few 10s of metres.

Newer versions of proj have support for geoids, which should solve this:

​https://trac.osgeo.org/proj/wiki/VerticalDatums

I think proj >= 4.8.0 is needed - the release announcement for it includes "Added preliminary vertical datum support". That was released 2012-03-14, so shouldn't be an unreasonable requirement.

It would be good to coordinate how vertical datums are handled with therion, but they didn't respond to my email to their list about doing so.

Currently the calibrate adjusts for the offset then multiplies by the scale factor, which works for a stretched tape with the end missing *calibrate tape 0.05 0.752

But of things like mounting a DistoX in a waterproof case the offset will be measured with another device so will not want scaling

Suggestion is to allow the addition of units to the offset if the scale factor should not be applied, this should allow the original format to continue to work while adding functionality.

if not units

real = ( reading - offset) * scale

If units eg *calibrate tape -0.05m 0.752

real = reading * scale - offset