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Newcomers DBPro Corner / Generation of a random REAL number?

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Monzi
20
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Joined: 10th May 2004
Location: Denmark
Posted: 7th Jan 2005 02:14
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How do i generate a random REAL number...
I tried this:

Speed#=Rnd(1.0)+1.0

But it only returns 1 and 2.

How do i do it?

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David T
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Posted: 7th Jan 2005 02:17 Edited at: 7th Jan 2005 02:18
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You could do this:



To get a random real between 0 and 67?



Think that works To get different numbers of decimal places change the 10,000.

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Monzi
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Location: Denmark
Posted: 7th Jan 2005 02:30
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Thanks for the inspiration

But i cooked it down to one line:
Speed#=1.0/(RND(9.0)+1.0)+RND(1.0)

This Generates a random number between 1.0 and 2.0 which is what i needed for my game

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Mnemonix
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Location: Skaro
Posted: 7th Jan 2005 02:48
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Putting complex equations within a single statement is generally a bad idea. Its known as cryptic programming and makes your code harder to read. Besides, there is no way to make a real random number because of the way computers work.

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Monzi
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Posted: 7th Jan 2005 03:07
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I know its not possible to make real random numbers on a computer. Nothing new there. But when i said REAL numbers i meant a number with decimals, 1.2 or 6.95 for example.

And i dont agree with you on the "complex equations" issue. I find it much more easy to read my code if an equation is fitted into one line instead of 10 lines. It makes it easier to navigate around the code if it can fill 100 lines instead of 500 lines.

What i do to make it easier to understand is to put in a few REM remarks instead.

And by the way, this code isnt really complex. Its perfectly straight forward.

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David T
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Posted: 7th Jan 2005 05:35
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I like to make equations as similar to their prototypes as possible, ie:

speed = distance / time

I'd probably write:



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IanM
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Posted: 7th Jan 2005 05:41 Edited at: 7th Jan 2005 05:42
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I have a random number generator posted in the codebase (not really random as Mnem just had to point out )

http://www.thegamecreators.com/?m=codebase_view_code&i=ec03b2ee8108c389ddf7072e24f770c3

You can use it to generate ranges easily, such as from 1.0 to 2.0:

x# = FloatRndRange(1.0, 2.0)

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Sven B
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Joined: 5th Jan 2005
Location: Belgium
Posted: 8th Jan 2005 05:24
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speed#=(10+rnd(10))/100
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