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???
01/17/08 09:46
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 		 #149630 - Scaling
Responding to: ???'s previous message
Jeroen Wilbers said:
But there a tricks in multiplying it all with a factor 10 or hunderd.

Christoph Franck said:
Multiplying with a power of 2 instead of a power of 10 will give you fixed-point numbers that have the point at full binary places, not fractions of them.


Multiplying by (powers of) 10 may make life easiest if the primary aim is to display the result in decimal;

Multiplying by (powers of) 2 may make life easiest for the processor;

Other multipliers might be advantageous in other situations...

List of 32 messages in thread
TopicAuthorDate
Global positioning algorithm            01/01/70 00:00      
   Global?            01/01/70 00:00      
   Ehm what do you receive?            01/01/70 00:00      
      coordinates            01/01/70 00:00      
         Length/absolute value of a vector ?            01/01/70 00:00      
         How do they know?            01/01/70 00:00      
         An old greek...            01/01/70 00:00      
            What about doppler            01/01/70 00:00      
               not doppler & math            01/01/70 00:00      
                  Haversine formula is it accurate for short distanc            01/01/70 00:00      
               Are you thinking of D-VOR            01/01/70 00:00      
            An old greek... not accurate enough for            01/01/70 00:00      
               Well, you're stating that it's a 2D space.            01/01/70 00:00      
                  Well, you're stating that it's a 2D space.            01/01/70 00:00      
                     So how wide are your roads?!            01/01/70 00:00      
               You said approximate            01/01/70 00:00      
               Some questions            01/01/70 00:00      
                  Answers to Cooper            01/01/70 00:00      
                     Plane should be fine, then            01/01/70 00:00      
                        Plane should be fine, then            01/01/70 00:00      
                           If you have cartesian coordinates ...            01/01/70 00:00      
                           complex math trough LUT            01/01/70 00:00      
                              Fixed point            01/01/70 00:00      
                                 Scaling            01/01/70 00:00      
                     You have wide roads, then!            01/01/70 00:00      
                        That's still wide!            01/01/70 00:00      
                     Much better            01/01/70 00:00      
                         Much better            01/01/70 00:00      
                           Adjusting for latitude            01/01/70 00:00      
                              Thanks            01/01/70 00:00      
                  Not entirely true            01/01/70 00:00      
                     You\'re right            01/01/70 00:00      

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