Using VarPtr in Play staement - Printable Version

Using VarPtr in Play staement - Printable Version

+- QB64 Phoenix Edition (https://qb64phoenix.com/forum)
+-- Forum: QB64 Rising (https://qb64phoenix.com/forum/forumdisplay.php?fid=1)
+--- Forum: Code and Stuff (https://qb64phoenix.com/forum/forumdisplay.php?fid=3)
+---- Forum: Help Me! (https://qb64phoenix.com/forum/forumdisplay.php?fid=10)
+---- Thread: Using VarPtr in Play staement (/showthread.php?tid=3250)

Using VarPtr in Play staement - PhilOfPerth - 12-05-2024

I'm trying to set the length of notes in a Play statement using a loop and Varptr, but can't hit on the correct syntax. This is what I'm currently trying:

Code: (Select All)
For D% = 1 To 3

    Play "L" + "X" + VarPtr$(D%) + "o3cdefgab"

Next

What am I doing wrong?

RE: Using VarPtr in Play staement - grymmjack - 12-06-2024

(12-05-2024, 11:39 PM)PhilOfPerth Wrote: I'm trying to set the length of notes in a Play statement using a loop and Varptr, but can't hit on the correct syntax. This is what I'm currently trying:

Code: (Select All)
For D% = 1 To 3 Play "L" + "X" + VarPtr$(D%) + "o3cdefgab" Next

What am I doing wrong?

I think you need to pass PLAY the whole string - the docs here show that:

Code: (Select All)
'Play scale in 7 different octaves

scale$ = "CDEFGAB"

play$ = "L16O=" + VARPTR$(i%) + "X" + VARPTR$(scale$)

FOR i% = 0 TO 6

    PLAY play$

NEXT

From: https://qb64phoenix.com/qb64wiki/index.php/PLAY

RE: Using VarPtr in Play staement - PhilOfPerth - 12-06-2024

(12-06-2024, 04:25 AM)grymmjack Wrote:
(12-05-2024, 11:39 PM)PhilOfPerth Wrote: I'm trying to set the length of notes in a Play statement using a loop and Varptr, but can't hit on the correct syntax. This is what I'm currently trying:

Code: (Select All)
For D% = 1 To 3 Play "L" + "X" + VarPtr$(D%) + "o3cdefgab" Next

What am I doing wrong?

I think you need to pass PLAY the whole string - the docs here show that:

Code: (Select All)
'Play scale in 7 different octaves scale$ = "CDEFGAB" play$ = "L16O=" + VARPTR$(i%) + "X" + VARPTR$(scale$) FOR i% = 0 TO 6 PLAY play$ NEXT

From: https://qb64phoenix.com/qb64wiki/index.php/PLAY

Thanks @grymmjack. I'll play around with that and see what I can figure out.
(as you can see, I'm not the quickest at absorbing new info)!

RE: Using VarPtr in Play staement - grymmjack - 12-06-2024

(12-06-2024, 09:05 AM)PhilOfPerth Wrote:
(12-06-2024, 04:25 AM)grymmjack Wrote:
(12-05-2024, 11:39 PM)PhilOfPerth Wrote: I'm trying to set the length of notes in a Play statement using a loop and Varptr, but can't hit on the correct syntax. This is what I'm currently trying:

Code: (Select All)
For D% = 1 To 3 Play "L" + "X" + VarPtr$(D%) + "o3cdefgab" Next

What am I doing wrong?

I think you need to pass PLAY the whole string - the docs here show that:

Code: (Select All)
'Play scale in 7 different octaves scale$ = "CDEFGAB" play$ = "L16O=" + VARPTR$(i%) + "X" + VARPTR$(scale$) FOR i% = 0 TO 6 PLAY play$ NEXT

From: https://qb64phoenix.com/qb64wiki/index.php/PLAY

Thanks @grymmjack. I'll play around with that and see what I can figure out.
(as you can see, I'm not the quickest at absorbing new info)!

OK good luck! Let us know how it goes Smile