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Re: wishlist for NXC
Posted: 19 Jan 2011, 14:52
by HaWe
indeed I was thinking of arrays of any type to be sorted, single dimensional arrays of integer as well as floats, maybe even 2-dim arrays of floats (= [x,y] coordinates, sorted to the x or the y value)
for this task having a function overloading surely would be helpful
I was asking because a qsort normally is already implemented in most of C libraries coming with the compilers, so I wouldn't have to try to write something like it on my own.
Re: wishlist for NXC
Posted: 19 Jan 2011, 15:54
by mightor
You would need a mechanism to create a pointer to a function that provides a comparison for the type in question. Otherwise there is no generic way of doing this.
- Xander
Re: wishlist for NXC
Posted: 19 Jan 2011, 16:25
by afanofosc
The enhanced NBC/NXC firmware does provide a way to sort a 1d array of any scalar type. It is exposed as the ArraySort NXC API function.
http://bricxcc.sourceforge.net/nbc/nxcd ... index.html
Search for ArraySort.
http://bricxcc.sourceforge.net/nbc/nxcd ... ample.html
John Hansen
Re: wishlist for NXC
Posted: 19 Jan 2011, 16:34
by HaWe
That's really great, thanks!
Even the ArrayOp is excellent ! :)
maybe you also wish to implement an ArrayMed and an OPARR_MED for the median? ;)
(edit: although it's simple, as it's just variant[(1+array_len)/2] of the sorted array (start counting at 1) or
variant[array_len/2] (start counting at 0))
Re: wishlist for NXC
Posted: 26 Jan 2011, 17:59
by HaWe
hi,
could we have a well working function for synched motor control which works less faulty than the current RotateMotorEx together with the current FW (OFW/EFW)?
e.g.
Code: Select all
void RotateMotorSync ( // sync is always true!
byte output_0, // Master: targets absolute value
byte output_1, // Slave: targets relative value
char pwr,
long angle,
char turnpct,
bool stop
)
Code: Select all
----------------- settings ----------------|------------- results ------------------
output_0, output_1, pwr angle turnpct stop | target_0 target_1 // comment
OUT_A OUT_B 75 400 100 true | 400 400 // 2nd: 100% = 400
OUT_A OUT_B 75 400 -100 true | 400 -400 // 2nd: -100% = -400
OUT_A OUT_B 75 400 0 true | 400 0 // 2nd: 0% 0f 400 = 0
OUT_A OUT_B 75 400 50 true | 400 200 // 2nd: 50% of 400 = 200
OUT_A OUT_B 75 400 -30 true | 400 -120 // 2nd: -30% of 400 = -120
OUT_A OUT_B 75 400 -3 true | 400 -12 // 2nd: -3% of 400 = -12
Re: wishlist for NXC
Posted: 26 Jan 2011, 20:36
by muntoo
Can we have a "ptr" alias for "unsigned long"?
Code: Select all
unsigned long addr = addressOf(??);
vs
Re: wishlist for NXC
Posted: 26 Jan 2011, 22:28
by schodet
doc-helmut wrote:hi,
could we have a well working function for synched motor control which works less faulty than the current RotateMotorEx together with the current FW (OFW/EFW)?
Code: Select all
----------------- settings ----------------|------------- results ------------------
output_0, output_1, pwr angle turnpct stop | target_0 target_1 // comment
OUT_A OUT_B 75 400 100 true | 400 400 // 2nd: 100% = 400
OUT_A OUT_B 75 400 -100 true | 400 -400 // 2nd: -100% = -400
OUT_A OUT_B 75 400 0 true | 400 0 // 2nd: 0% 0f 400 = 0
OUT_A OUT_B 75 400 50 true | 400 200 // 2nd: 50% of 400 = 200
OUT_A OUT_B 75 400 -30 true | 400 -120 // 2nd: -30% of 400 = -120
OUT_A OUT_B 75 400 -3 true | 400 -12 // 2nd: -3% of 400 = -12
What would be different compared to starting both motor with a different speed and angle?
Re: wishlist for NXC
Posted: 27 Jan 2011, 09:08
by HaWe
the sync mode.
both motors run during the same time until they finally have reached their individual target concurrently,
i.e. with turnpct=100% the difference between both counters must not exceed more than e.g. 1 degree ever
and with small turnpcts it's simultaneously the proportional value +/-1:
Code: Select all
angle=400, turnpct=50
motor_0 0 50 100 150 200 250 300 350 400 // absolute
motor_1 0 25 50 75 100 125 150 175 200 // simultaneously proportionally +-1
Re: wishlist for NXC?
Posted: 29 Jan 2011, 14:25
by HaWe
afanofosc wrote:One thing I know Xander has wished for is support for overloaded functions so that you could write:
Code: Select all
int foobar(int x, int y) { return x+y; }
string foobar(string x, string y) { return x + y; }
are there (hopefully) already any news about this subject?
Re: wishlist for NXC
Posted: 30 Jan 2011, 13:38
by HaWe
doc-helmut wrote:can we have more kinds of formatting parameters for FormatString or printf except %d or %f
...
hi,
I just observed that FomatNum already works in the 20101103 release with fmt="%x", "%04x" as well as with "%s" .
No idea why I couldn't make it work so far.
Unfortunately I still couldn't find a hint about fmt string parameters in the help (FormatNum topic).
Just e.g. "%9s" for flush right tabulator string formatting does not work, but I'm not sure if this is standard anyway.
Code: Select all
#define printf1( _x, _y, _format1, _value1) { \
string sval1 = FormatNum(_format1, _value1); \
TextOut(_x, _y, sval1); \
}
printf1( 0,LCDline[0], "seed=%8d dc",RAND_SEED);
printf1( 0,LCDline[1], "seed=%08x hx",RAND_SEED); // nums flush right
printf1( 0,LCDline[2], "%9s", "press"); // strings flush left
printf1( 0,LCDline[3], "%9s", "any");
printf1( 0,LCDline[4], "%9s", "btn");
printf1( 0,LCDline[5], "%9s", "to");
printf1( 0,LCDline[6], "%9s", "continue");
But it's fine that fmt works already not only for numbers but also for strings. Now that it's possible to display both numbers and strings with one universal ANSI-like printf function! :)