[Liblas-devel] GetClassification() et al.

[Peder Axensten]

I ran the following:

	liblas::Point p;
	liblas::Classification c1( 7, true /*synthetic*/, false /*keypoint*/, true /*withheld*/ ); // set all bits of classification
	p.SetClassification( c1 ); // set point with classification
	liblas::Classification		c2;
	c2 = p.GetClassification();
	std::cout	<< "TEST:\n"
				<< "1 Synthetic: " << c1.IsSynthetic() << "\n"
				<< "1 Keypoint:  " << c1.IsKeyPoint() << "\n"
				<< "1 Withheld:  " << c1.IsWithheld() << "\n"
				<< "2 Synthetic: " << c2.IsSynthetic() << "\n"
				<< "2 Keypoint:  " << c2.IsKeyPoint() << "\n"
				<< "2 Withheld:  " << c2.IsWithheld() << "\n"
				;


And I got:
TEST:
1 Synthetic: 1
1 Keypoint:  0
1 Withheld:  1
2 Synthetic: 0
2 Keypoint:  0
2 Withheld:  0

My conclusion is that SetClassification() filters the Classification, so that only the lower 5 bits remain.
I'd be happy if someone could correct me, but to me it seems that there is no way to set the higher bits of a Point's Classification.

Also, I'd suggest a GetRawClassification() member function to Point, to retrieve all the eight bits at once.

Very best regards,
/Peder





On 24 okt 2011, at 16:49, Mateusz Łoskot wrote:

> On 24 October 2011 15:21, Peder Axensten <Peder.Axensten at slu.se> wrote:
>> I'm interested in retrieving and setting all the eight bits at once.
> 
> Point p;
> Classification c(7, true /*synthetic*/, false /*keypoint*/, true
> /*withheld*/); // set all bits of classification

Yes, it does.

> p.SetClassification(c); // set point with classification

No, it only sets the "7" -- synthetic, key point, and withheld values are ignored.

> 
> You can also modify:
> 
> c.SetKeyPoint(true); // modify classification
> p.SetClassification(c); // set point with modified classification
> 
> Best regards,
> -- 
> Mateusz Loskot, http://mateusz.loskot.net
> Charter Member of OSGeo, http://osgeo.org
> Member of ACCU, http://accu.org
> _______________________________________________
> Liblas-devel mailing list
> Liblas-devel at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/liblas-devel