QGraphicsView and very small scale values

[Vladimir]

I've thought that limits of double (and float) datatypes are quite higher, on my system DBL_MIN=2.22507e-308, FLT_MIN=1.17549e-38. And in Qt4.2 it worked quite better.

I can't just divide all values by fixed number since they are not known in advance. It seems that I have to forget about scale() method and use manual scaling.

[wysota]

It's about the resolution, not the highest/lowest possible value. Floating point types can't represent each and every possible value between in its range.

You don't have to know anything in advance, you can calculate the divisor dynamically.

[Vladimir]

You don't have to know anything in advance, you can calculate the divisor dynamically.

I'm thinking about going this way. In essential this is manual scaling.

Actually you can just take a look at my program: http://edu.kde.org/step. This screenshot was made with Qt4.2, with 4.3 it shows only several planets at the center.