Ed P

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  • in reply to: 3D Ray Tracing #20224
    Ed PEd P
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      @edps
      Forumite Points: 39

      Just a follow-up comment, while of course your comment about texture detail is correct it really only applies to background LoD work where probably an average normal map is burn into the textures, but for foreground action work that HAS to be done with polygons and where necessary distorted by skeletons and whatever process is used to transfer the result to the game engine (e.g. Maya->Cry Engine)

      in reply to: 3D Ray Tracing #20217
      Ed PEd P
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        @edps
        Forumite Points: 39

        Dan, you may be interested in this technical article for Kingdom Come Deliverance (Google the title for some quite stunning eye-candy You-tube RT porn). This game is ‘old-school’ but sets a pretty high bar for realism. As said in this article, they used a texel (pixel texture) count of 256 texels/sq metre of scene. While that requires a lot of work, it requires even better database design to be able to build up scenes from a palette of texel objects.

        Where I anticipate the M$ api benefiting is that it will make the 512 texels/metre target more achievable.

        in reply to: How-to Pwn HMS Queen Elizabeth! #20215
        Ed PEd P
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          @edps
          Forumite Points: 39

          Dave, this was just a thought exercise, in my initial sentence I said that I doubted if it was possible. However with nearly every controller having a PIC chip or some form of intelligence that can be compromised (say after a number of clock cycles pass) then it would have required a verification that every bit of electro-mechanical equipment certifies that all its components come from verifiable sources and don’t for example have an Apple logo on them. (a generic reference for a company that sources from China), you could just as well substitute Intel’s OEM locations in Turkey or Israel as ones that are also open to compromise.

          The advent of Software Defined Radio raises new possibilities in ways of breaching a diode-protected system. (It was recently discovered that a system commonly used within nuclear power plant control systems has a built-in, hard-coded backdoor!)

          In the same way Stuxnet was a multilevel multi-system attack I cannot imagine that any diode system  breach will be accomplished by a single system being compromised.

          *diode-protected. Information flow is one way only.

          [edit] If a ship’s radio system is compromised the ‘script’ or code could come from anywhere in the world. There were for example rumours that Russia had done something similar to The Donald Cook an Aegis destroyer in the Black Sea.

          in reply to: How-to Pwn HMS Queen Elizabeth! #20207
          Ed PEd P
          Participant
            @edps
            Forumite Points: 39

            The chip in question does not have to be on an Internet connected computer system Dave, for example it could be on the radio or any other bit of electronic kit that has a connection to both the on-board and outside world and forms a part of the integrated system. That is the intrinsic nastiness of this potential exploit.

            in reply to: Present state of meself. #20197
            Ed PEd P
            Participant
              @edps
              Forumite Points: 39

              I agree with Richard wrt  becoming knowledgeable and ‘helping others to help you’.  Unfortunately despite what the Tory propaganda machine says about NHS funding, the system is close to becoming unravelled. I have a good relationship with my GP and she said that she had reluctantly been forced to halve her hours as there was a stark choice between her family and her job. She just could not do justice to one without screwing up the other. I cannot say I blame her as she was working a 60 hour week for most of the year including the greater part of school holidays.

              Luckily I live in an area that has an excellent IT system and the well trained admin staff know how to feed it and wheedle out mobile phone contacts etc from patients to the extent I get a pretty seamless automated system of call-ups, reminders and prescription renewals which has taken some load off the GPs, but obviously not enough to balance all job/family pressures.

              I hate to think what happens in less attractive inner city areas with carp systems.

              in reply to: Open3D #20190
              Ed PEd P
              Participant
                @edps
                Forumite Points: 39

                On a quick read the library looks good for translating point clouds into meshes (can otherwise be quite difficult to program) and handles 3D graphics visualisation of mathematical objects. Where it appears lacking is in file import handling. I could not see any functions for importing (say) .obj, or 3DS etc. You may need to use something like Meshlab to get an existing model in a form it can use.

                in reply to: Leader Board #20186
                Ed PEd P
                Participant
                  @edps
                  Forumite Points: 39

                  I’m not sure it serves much purpose to most posters. I did not even know it was there until John raised the topic. I guess it is a bit like Forum Coins – I’m not sure of their purpose either.

                  in reply to: Shortcodes not parsing in tech forum section #20177
                  Ed PEd P
                  Participant
                    @edps
                    Forumite Points: 39

                    Strange one that. Your link certainly generates the bug, but if you enter the forum via ‘Latest Replies’ it renders correctly!

                    in reply to: 3D Ray Tracing #20176
                    Ed PEd P
                    Participant
                      @edps
                      Forumite Points: 39

                      I need to read the api again, but to me the api did not seem to require improved modelling, triangulation or uv mapping its main focus appears to be that of providing more efficient culling so that only the rays that will appear in a scene actually need to be traced, thus making ray tracing more affordable.

                      The way I think of it that old school rasterization works from the viewer towards the object and culls the z-map as it goes. The M$ api ray traces only the visible pixels back from the object to the viewer.  This incidentally ought to automatically comprehend occlusion effects – the sort of fuzzy edges that objects can have. It should also automatically generate shadow maps.

                      My guess would be that its first impact will be on very much improved in-game graphics.

                      in reply to: Freeview Recorder #20166
                      Ed PEd P
                      Participant
                        @edps
                        Forumite Points: 39

                        As you still have the Sky Box, the cost of Freesat+PVR(using Sky Box) may be ~£100 for dish+fixing. It could be a better option than a new terrestrial aerial+cable, and not much difference in cost. Depending on your line of sight towards SSE and around 20 degrees azimuth (link) you may even be able to get an outside wall fixing in which case DIY is not impossible.

                        in reply to: Freeview Recorder #20155
                        Ed PEd P
                        Participant
                          @edps
                          Forumite Points: 39

                          Leading question – when you got rid of Sky, what happened to your satellite dish?  Freesat may be an attractive option to investigate for improving your signal.

                          in reply to: Beer from other countries #20154
                          Ed PEd P
                          Participant
                            @edps
                            Forumite Points: 39

                            Its not the temperatures Dave, it is the time it takes to acclimatise.  When you live in the tropics for more than three months your body changes dramatically (in essence you become a bit of a camel and carry more water inside). Going from here to 30 degrees is tough wherever it is!

                            Incidentally I wanted to add a warning to imbibing wheat beer. It is ‘alive’ and over imbibing can give you a nasty run for your money if you are not used to it!

                            in reply to: LONG Term Use, Proton Pump Inhibitor(PPI) #20107
                            Ed PEd P
                            Participant
                              @edps
                              Forumite Points: 39

                              Richard if you get a near constant cough that is one of the symptoms of B12 deficiencies. Often confused with BP pill side effects — been there been through the process!

                              It may be useful if a Mod could change PPI to “Proton Pump Inhibitor(PPI)” — thanks!

                              in reply to: Pi #20101
                              Ed PEd P
                              Participant
                                @edps
                                Forumite Points: 39

                                Could you make a Blender render farm from such a build?

                                in reply to: LONG Term Use, Proton Pump Inhibitor(PPI) #20100
                                Ed PEd P
                                Participant
                                  @edps
                                  Forumite Points: 39

                                  Sorry about that Boris, I guess it is one of those medications that users get to know by the generic PPI term rather than the lexicon of different names from the various Pharma companies. Hopefully long term users will realise that the context of Health->Supplements  will eliminate the irritating Payment Protection Insurance epithet!

                                  in reply to: Arthritis? #20077
                                  Ed PEd P
                                  Participant
                                    @edps
                                    Forumite Points: 39

                                    I guess that latter statement I made could be inferred to say that there is a 20% mixed placebo/real effect for painkillers with but only 10% of pain killers really work without some sort of placebo effect.

                                    Sorry for the divert, I have always found placebos fascinating ever since the time when I was a 10 yr old child and my GP used it to eradicate a wart using something akin to a witch-doctor’s trick of telling me the painful consequences of what he would do if his painless fakery failed. (it worked of course)

                                    Missing link

                                     

                                    in reply to: Arthritis? #20074
                                    Ed PEd P
                                    Participant
                                      @edps
                                      Forumite Points: 39

                                      Too damned logical for  the placebo effect to work!

                                      Outside the US — In 1996, a painkiller relieved symptoms in 73 percent more patients than a placebo. i.e. there is roughly a 30% placebo effect. Tough luck – you just have to BELIEVE that the mind is stronger than the body, a little more than you do, then you could BELIEVE aspirin cures all. (incidentally the placebo effect for that most dangerous drug, paracetamol is very high)

                                      Why outside the US ? basically because of the heavy drug marketing that goes on – there the placebo effect is now only about 10%

                                      in reply to: PC doing silly things #20072
                                      Ed PEd P
                                      Participant
                                        @edps
                                        Forumite Points: 39

                                        Oldie but goodie! . . .

                                        Admin mode SFC /scannow from an Admin mode command line.

                                        in reply to: PC doing silly things #20062
                                        Ed PEd P
                                        Participant
                                          @edps
                                          Forumite Points: 39

                                          Ask him if he has a USB PVR stick permanently plugged in. The older ones drew a LOT of amps and could not only bring down the associated USB bus but cause voltage spikes triggering resets etc. Nasty little bits of kit.

                                          in reply to: Pi #20049
                                          Ed PEd P
                                          Participant
                                            @edps
                                            Forumite Points: 39

                                            Steve, my Nintendo-like Pi enclosure arrived – it is extremely well designed with ‘working’ buttons that connect up to most full-blown Pi’s (not the zero without some effort). If I wasn’t busy trying to get the official  7 inch screen touch screen working for my ‘school’ demo. I’d be at it like a rat down a drainpipe.

                                            I’ve decided to base my show and tell on “Adventures in Minecraft” by O’Hanlon/Whale. Lots of good projects in there which could cover a lot of the TEM parts of STEAM. Some Science could be cobbled up with ball rolling, and a cannon game, and I guess Minecraft makes ‘pretty’ terrains for the Arts bit.Ditto maybe a bit of geology could be cobbled up but I don’t think I have the time to do it!

                                            However I’m totally stuck on any Chemistry demos as all the fun (bangs, stinks and an element of danger) have been totally removed by the Elf &Safety Mafia. Ditto Biology. I’m not sure that I would ever have gravitated towards my degree courses in today’s zero risk environment!

                                          Viewing 20 posts - 3,361 through 3,380 (of 4,843 total)