Re: [Flightgear-devel] lamp-post appearance depends on camera tilt angle
John Denker wrote: 1) I closed the bug-tracker issue concerning the taxiway signs. That's all good. 2) Alas there are other scenery elements that still exhibit an improper dependence on camera tilt angle. Example: http://www.av8n.com/fly/fgfs/img48/pole-dark.png in contrast to http://www.av8n.com/fly/fgfs/img48/pole-red-white.png I have a hard time seeing any difference between the two images. In particular, look at the lamp post just to the right of the tan building, directly above the aircraft compass. Its appearance changes dramatically as a function of camera tilt angle. The only thing I see is that in one of the images the screen resolution removes a row of pixels at the left of the pole. That's the problem with any digital representation of an analogue world. Maybe activating filtering will solve this. Erik -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] lamp-post appearance depends on camera tilt angle
Could the poster be referring to the pole in the middle distance on the right directly above the compass, it changes from bright whites into greys, or even transparence. Pretty subtle. I have a hard time seeing any difference between the two images. -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] lamp-post appearance depends on camera tilt angle
- James Sleeman a écrit : Could the poster be referring to the pole in the middle distance on the right directly above the compass, it changes from bright whites into greys, or even transparence. Pretty subtle. I have a hard time seeing any difference between the two images. This is an aliasing problem inherent to texture filtering and mipmapping. Fully transparent pixel are usually black and they smear inside the visible one as the mipmap combine adjacent texel into a semi transparent one. To avoid that, the modeller should assign the same color for all texel before making them transparent. -Fred -- Frédéric Bouvier http://my.fotolia.com/frfoto/ Photo gallery - album photo http://fgsd.sourceforge.net/ FlightGear Scenery Designer -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] lamp-post appearance depends on camera tilt angle
1) I closed the bug-tracker issue concerning the taxiway signs. That's all good. 2) Alas there are other scenery elements that still exhibit an improper dependence on camera tilt angle. Example: http://www.av8n.com/fly/fgfs/img48/pole-dark.png in contrast to http://www.av8n.com/fly/fgfs/img48/pole-red-white.png In particular, look at the lamp post just to the right of the tan building, directly above the aircraft compass. Its appearance changes dramatically as a function of camera tilt angle. Note that I have gone to some trouble to control for variables that might _properly_ affect the appearance. The illumination is not changing, and the point-of-view location is not changing. Only the camera tilt angle is changing in the example screenshots cited above. Object appearance should not depend on this. I don't have any first-hand understanding of what's going on, but it is easy to hypothesize that the lamp-posts are afflicted by the same disease the afflicted the taxiway signs. Or not. In any case, this is a definite opportunity for improvement, since the unstable appearance is quite noticeable to pilots who are just taxiing along, minding their own business. -- Download Intel#174; Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
