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Floating Point Math

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  • E Ennis Ray Lynch Jr

    We do have both, their are libraries that allow for infinite precision just peeps don't use them because they are slow. (Infinite subject to limits of hardware)

    Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting. "And they, since they Were not the one dead, turned to their affairs" -- Robert Frost "All users always want Excel" --Ennis Lynch

    L Offline
    L Offline
    Lost User
    wrote on last edited by
    #7

    Right, so why ask us to choose?

    1 Reply Last reply
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    • E Ennis Ray Lynch Jr

      Query for all the naysayers ... which would you rather have fast floating point operations or 15 places of accurate precision? Most of my work four places is good enough and I wrote a hurricane damage simulator.

      Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting. "And they, since they Were not the one dead, turned to their affairs" -- Robert Frost "All users always want Excel" --Ennis Lynch

      T Offline
      T Offline
      thrakazog
      wrote on last edited by
      #8

      Ennis Ray Lynch, Jr. wrote:

      I wrote a hurricane damage simulator

      I didn't know you worked on Sim City.

      Play my game Gravity: Android[^], Windows Phone 7[^]

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      • C CPallini

        I would like to have a bunch of smart developers, you know the ones able to write hurricane damage simulators using only four places of precision.

        THESE PEOPLE REALLY BOTHER ME!! How can they know what you should do without knowing what you want done?!?! -- C++ FQA Lite

        OriginalGriffO Offline
        OriginalGriffO Offline
        OriginalGriff
        wrote on last edited by
        #9

        I can to it with 8 bit integers! It won't be a even slightly accurate simulation, of course, but... :laugh:

        Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952) Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)

        "I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
        "Common sense is so rare these days, it should be classified as a super power" - Random T-shirt

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        • C Chris Losinger

          i have a couple of image processing fns which input and output BYTEs but need to convert the input to doubles for the internals because even floats run out of precision well within reasonable parameters. i'd love to be able to not have to use 24 bytes per pixel, but...

          image processing toolkits | batch image processing

          enhzflepE Offline
          enhzflepE Offline
          enhzflep
          wrote on last edited by
          #10

          Chris Losinger wrote:

          i'd love to be able to not have to use 24 bytes per pixel,

          er, bits? But, as we all know - palletized images suck when it comes to performing any real manipulation on them, since you're stuck with looking-up the 24 bit values anyway. Alpha-blending images with a pallette? :shudder: Uhhhrgh! Please dont make me do that again. Recomputing a new pallete is more effort than the image processing itself.

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          • T thrakazog

            Ennis Ray Lynch, Jr. wrote:

            I wrote a hurricane damage simulator

            I didn't know you worked on Sim City.

            Play my game Gravity: Android[^], Windows Phone 7[^]

            E Offline
            E Offline
            Ennis Ray Lynch Jr
            wrote on last edited by
            #11

            Mine isn't nearly as accurate. Wind fields in real-life are surprisingly non-deterministic and literally change with the phase of the moon.

            Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting. "And they, since they Were not the one dead, turned to their affairs" -- Robert Frost "All users always want Excel" --Ennis Lynch

            Sander RosselS J 2 Replies Last reply
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            • enhzflepE enhzflep

              Chris Losinger wrote:

              i'd love to be able to not have to use 24 bytes per pixel,

              er, bits? But, as we all know - palletized images suck when it comes to performing any real manipulation on them, since you're stuck with looking-up the 24 bit values anyway. Alpha-blending images with a pallette? :shudder: Uhhhrgh! Please dont make me do that again. Recomputing a new pallete is more effort than the image processing itself.

              C Offline
              C Offline
              Chris Losinger
              wrote on last edited by
              #12

              no, BYTEs. doubles are 8 bytes each. 3x8 = 24 bytes.

              image processing toolkits | batch image processing

              enhzflepE 1 Reply Last reply
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              • OriginalGriffO OriginalGriff

                I can to it with 8 bit integers! It won't be a even slightly accurate simulation, of course, but... :laugh:

                Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952) Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)

                P Offline
                P Offline
                PIEBALDconsult
                wrote on last edited by
                #13

                You find yourself in a small Sailboat 10 miles East of Cuba. There is a Class 5 Hurricane approaching from the South at 10 miles per hour.

                You'll never get very far if all you do is follow instructions.

                OriginalGriffO 1 Reply Last reply
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                • E Ennis Ray Lynch Jr

                  Query for all the naysayers ... which would you rather have fast floating point operations or 15 places of accurate precision? Most of my work four places is good enough and I wrote a hurricane damage simulator.

                  Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting. "And they, since they Were not the one dead, turned to their affairs" -- Robert Frost "All users always want Excel" --Ennis Lynch

                  M Offline
                  M Offline
                  Marc Clifton
                  wrote on last edited by
                  #14

                  Ennis Ray Lynch, Jr. wrote:

                  Most of my work four places is good enough and I wrote a hurricane damage simulator.

                  Well, how much precision do you need to say $15 billion (or whatever the number is in billions of dollar?) Marc

                  Latest Articles - APOD Scraper and Hunt the Wumpus Short video on Membrane Computing Hunt the Wumpus (A HOPE video)

                  E 1 Reply Last reply
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                  • E Ennis Ray Lynch Jr

                    Query for all the naysayers ... which would you rather have fast floating point operations or 15 places of accurate precision? Most of my work four places is good enough and I wrote a hurricane damage simulator.

                    Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting. "And they, since they Were not the one dead, turned to their affairs" -- Robert Frost "All users always want Excel" --Ennis Lynch

                    C Offline
                    C Offline
                    Chris Maunder
                    wrote on last edited by
                    #15

                    Someone, somewhere, is thinking "I am a hurricane damage simulator".

                    cheers Chris Maunder

                    N 1 Reply Last reply
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                    • P PIEBALDconsult

                      You find yourself in a small Sailboat 10 miles East of Cuba. There is a Class 5 Hurricane approaching from the South at 10 miles per hour.

                      You'll never get very far if all you do is follow instructions.

                      OriginalGriffO Offline
                      OriginalGriffO Offline
                      OriginalGriff
                      wrote on last edited by
                      #16

                      So, provided I can do 11 mph due north, I'm fine and dandy! (I don't want to go to Cuba today - I don't smoke)

                      Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952) Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)

                      "I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
                      "Common sense is so rare these days, it should be classified as a super power" - Random T-shirt

                      L 1 Reply Last reply
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                      • OriginalGriffO OriginalGriff

                        So, provided I can do 11 mph due north, I'm fine and dandy! (I don't want to go to Cuba today - I don't smoke)

                        Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952) Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)

                        L Offline
                        L Offline
                        Lost User
                        wrote on last edited by
                        #17

                        Instead of running before a speeding object, I'd recommend stepping aside. Go West.

                        Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^]

                        OriginalGriffO 1 Reply Last reply
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                        • M Marc Clifton

                          Ennis Ray Lynch, Jr. wrote:

                          Most of my work four places is good enough and I wrote a hurricane damage simulator.

                          Well, how much precision do you need to say $15 billion (or whatever the number is in billions of dollar?) Marc

                          Latest Articles - APOD Scraper and Hunt the Wumpus Short video on Membrane Computing Hunt the Wumpus (A HOPE video)

                          E Offline
                          E Offline
                          Ennis Ray Lynch Jr
                          wrote on last edited by
                          #18

                          You are not supposed to point out flaws in my argument!

                          Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting. "And they, since they Were not the one dead, turned to their affairs" -- Robert Frost "All users always want Excel" --Ennis Lynch

                          1 Reply Last reply
                          0
                          • L Lost User

                            Instead of running before a speeding object, I'd recommend stepping aside. Go West.

                            Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^]

                            OriginalGriffO Offline
                            OriginalGriffO Offline
                            OriginalGriff
                            wrote on last edited by
                            #19

                            Depends how fast I can move, and the size and initial distance to the storm. Going west means I need to move faster than running directly away.

                            Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952) Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)

                            "I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
                            "Common sense is so rare these days, it should be classified as a super power" - Random T-shirt

                            L 1 Reply Last reply
                            0
                            • OriginalGriffO OriginalGriff

                              Depends how fast I can move, and the size and initial distance to the storm. Going west means I need to move faster than running directly away.

                              Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952) Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)

                              L Offline
                              L Offline
                              Lost User
                              wrote on last edited by
                              #20

                              OriginalGriff wrote:

                              Depends how fast I can move, and the size and initial distance to the storm.

                              Size! ..that's the thing I did not take into account. Ah, just a small bug :laugh:

                              Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^]

                              OriginalGriffO M 2 Replies Last reply
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                              • L Lost User

                                OriginalGriff wrote:

                                Depends how fast I can move, and the size and initial distance to the storm.

                                Size! ..that's the thing I did not take into account. Ah, just a small bug :laugh:

                                Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^]

                                OriginalGriffO Offline
                                OriginalGriffO Offline
                                OriginalGriff
                                wrote on last edited by
                                #21

                                There's always something, isn't there? :laugh:

                                Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952) Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)

                                "I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
                                "Common sense is so rare these days, it should be classified as a super power" - Random T-shirt

                                L 1 Reply Last reply
                                0
                                • OriginalGriffO OriginalGriff

                                  There's always something, isn't there? :laugh:

                                  Those who fail to learn history are doomed to repeat it. --- George Santayana (December 16, 1863 – September 26, 1952) Those who fail to clear history are doomed to explain it. --- OriginalGriff (February 24, 1959 – ∞)

                                  L Offline
                                  L Offline
                                  Lost User
                                  wrote on last edited by
                                  #22

                                  Not always, but very often :rolleyes:

                                  1 Reply Last reply
                                  0
                                  • C Chris Losinger

                                    no, BYTEs. doubles are 8 bytes each. 3x8 = 24 bytes.

                                    image processing toolkits | batch image processing

                                    enhzflepE Offline
                                    enhzflepE Offline
                                    enhzflep
                                    wrote on last edited by
                                    #23

                                    Chris Losinger wrote:

                                    but need to convert the input to doubles for the internals

                                    :doh: Of course. Must be about time for bed for me... Those images sure do get pretty big, pretty quick, at that rate of memory consumption.

                                    1 Reply Last reply
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                                    • E Ennis Ray Lynch Jr

                                      Query for all the naysayers ... which would you rather have fast floating point operations or 15 places of accurate precision? Most of my work four places is good enough and I wrote a hurricane damage simulator.

                                      Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting. "And they, since they Were not the one dead, turned to their affairs" -- Robert Frost "All users always want Excel" --Ennis Lynch

                                      D Offline
                                      D Offline
                                      Dr Walt Fair PE
                                      wrote on last edited by
                                      #24

                                      I work on stuff where 15 digits is marginally OK, using plenty of trickery.

                                      CQ de W5ALT

                                      Walt Fair, Jr., P. E. Comport Computing Specializing in Technical Engineering Software

                                      1 Reply Last reply
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                                      • L Lost User

                                        OriginalGriff wrote:

                                        Depends how fast I can move, and the size and initial distance to the storm.

                                        Size! ..that's the thing I did not take into account. Ah, just a small bug :laugh:

                                        Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^]

                                        M Offline
                                        M Offline
                                        Mycroft Holmes
                                        wrote on last edited by
                                        #25

                                        Eddy Vluggen wrote:

                                        Size!

                                        It does matter apparently!

                                        Eddy Vluggen wrote:

                                        Ah, just a small bug

                                        That's what she said.

                                        Never underestimate the power of human stupidity RAH

                                        1 Reply Last reply
                                        0
                                        • C Chris Maunder

                                          Someone, somewhere, is thinking "I am a hurricane damage simulator".

                                          cheers Chris Maunder

                                          N Offline
                                          N Offline
                                          Nagy Vilmos
                                          wrote on last edited by
                                          #26

                                          Sean been at the hamsters' sunflower hooch again?

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