Galton box animation: Difference between revisions
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m (→{{header|REXX}}: implemented a better method to abvoid collisions.) |
(→{{header|REXX}}: added code to automatically freeze the REXX program to enable to capture a point in time (for a screenshot); also changed wording in the REXX section header.) |
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Balls are dropped continuously (up to a number specified or the default), the default is enough rows of |
Balls are dropped continuously (up to a number specified or the default), the default is enough rows of |
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<br> |
<br>pins to fill the top <big><sup>1</sup>/<sub>3</sub></big> rows of the terminal screen. |
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Extra code could've been added to check for which OS (operating system) is being used and which REXX is |
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<br>running to determine which program to clear the terminal (screen). Currently, it is |
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hard-coded to '''CLS'''. |
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<lang rexx>/*REXX pgm simulates Sir Francis Galton's box, aka: Galton Board, quincunx, bean machine*/ |
<lang rexx>/*REXX pgm simulates Sir Francis Galton's box, aka: Galton Board, quincunx, bean machine*/ |
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trace off /*suppress error messages from a HALT. */ |
trace off /*suppress error messages from a HALT. */ |
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signal on halt /*allow the user to halt the program.*/ |
signal on halt /*allow the user to halt the program.*/ |
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parse arg rows balls seed . |
parse arg rows balls freez seed . /*obtain optional arguments from the CL*/ |
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if rows =='' | rows=="," then rows= 0 /*Not specified? Then use the default.*/ |
if rows =='' | rows=="," then rows= 0 /*Not specified? Then use the default.*/ |
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if balls=='' | balls=="," then balls= 100 /* " " " " " " */ |
if balls=='' | balls=="," then balls= 100 /* " " " " " " */ |
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if freez=='' | freez=="," then freez= 0 /* " " " " " " */ |
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if datatype(seed, 'W') then call random ,,seed /*Was a seed specified? Then use seed.*/ |
if datatype(seed, 'W') then call random ,,seed /*Was a seed specified? Then use seed.*/ |
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parse value scrsize() with sd sw . /*obtain the terminal depth and width. */ |
parse value scrsize() with sd sw . /*obtain the terminal depth and width. */ |
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end /*g*/ |
end /*g*/ |
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do r=1 for g; _= strip(@.r, 'T'); if r==2 then _= _ left('', 9) info; say _ |
do r=1 for g; _= strip(@.r, 'T'); if r==2 then _= _ left('', 9) info; say _ |
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end /*r*/; |
end /*r*/; if step==freez then pull; return /* [↑] show a row.*/</lang> |
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This REXX program makes use of '''SCRSIZE''' REXX program (or |
This REXX program makes use of '''SCRSIZE''' REXX program (or |
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BIF) which is used to determine the screen |
BIF) which is used to determine the screen |
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The terminal size used for this display was '''64'''<small>x</small>'''96'''. |
The terminal size used for this display was '''64'''<small>x</small>'''96'''. |
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{{out|output|text= when using the |
{{out|output|text= when the REXX program was "stopped" by using the inputs of <tt> , , 100 </tt> so as to freeze the program to capture a screenshot:}} |
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<pre> |
<pre> |
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{{out|output|text= when using the default inputs; this is the final screenshot:}} |
{{out|output|text= when using the default inputs; this is the final screenshot:}} |
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<pre> |
<pre> |
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· step 353 |
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· step 148 |
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</pre> |
</pre> |
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