DRAW sequence m option

[CharlieJV]

Can someone please elaborate a bit on the m x,y (and its related +/- options)  in the draw command? It doesn't get a mention (that I can find) in the Help file, and the Wiki one is pretty unclear. How is it fitted into a draw string, and does it need parentheses, or commas etc? 

Sample code if you want to play around:

Code: (Select All)

screen _newimage(200, 200, 12)

xf = 150
yf = 150

do
x = int(rnd*200)
y = int(rnd*200)
draw "B M" + str$(x) + "," + str$(y)
draw "d15 r15 u15 l15 m " + str$(xf) + "," + str$(yf)
_display
_delay 1.25
loop

[Dimster]

Ok, one more shot at this 

This seems to work

Screen 9
PSet (10, 10), 2

Draw "D50"
Draw "r100"
Draw "u50"
Draw "l100"
Draw "M25,50"
Draw "M" + "25,-10"

At least it doesn't error out

[CharlieJV]

Can someone please elaborate a bit on the m x,y (and its related +/- options)  in the draw command? It doesn't get a mention (that I can find) in the Help file, and the Wiki one is pretty unclear. How is it fitted into a draw string, and does it need parentheses, or commas etc? 

Sample code if you want to play around:

Code: (Select All)

screen _newimage(200, 200, 12)

xf = 150
yf = 150

do
x = int(rnd*200)
y = int(rnd*200)
draw "B M" + str$(x) + "," + str$(y)
draw "d15 r15 u15 l15 m " + str$(xf) + "," + str$(yf)
_display
_delay 1.25
loop

And now, for the giggles, try the same program with a little tweak so that the second M command is a relative coordinate instead of a fixed coordinate:

Code: (Select All)

screen _newimage(200, 200, 12)

xf = 150
yf = 150

do
x = int(rnd*200)
y = int(rnd*200)
draw "B M" + str$(x) + "," + str$(y)
draw "d15 r15 u15 l15 m -" + str$(xf) + ",-" + str$(yf)
_display
_delay 1.25
loop

[PhilOfPerth]

Thanks Charlie and Dimster. It's much clearer now. Time to go play!
The question was related to a little exercise I'm doing at the moment, involving pi.
(no, Bplus, not that pie)!

[bplus]

I hope it's apple! :-))

[Pete]

Does Apple Pi run on Windows?

Pete

[PhilOfPerth]

Does Apple Pi run on Windows?

Pete

Apple pi doesn't run!  Lemonade runs!

[mnrvovrfc]

:
Draw "M" + "25,-10"

At least it doesn't error out

The plus sign needs to be inside the quoted string like:

Code: (Select All)

Draw "M+25,-10"

so the processor knows it's a relative draw. You wouldn't be able to change the plus to minus in that line of code of yours because it would give out a syntax error.

[Pete]

Does Apple Pi run on Windows?

Pete

Apple pi doesn't run!  Lemonade runs!

I tried putting Lemonade on my Windows, once, but my keyboard shorted out. I guess I made a pour choice.

Pete

[PhilOfPerth]

Does Apple Pi run on Windows?

Pete

Apple pi doesn't run!  Lemonade runs!

I tried putting Lemonade on my Windows, once, but my keyboard shorted out. I guess I made a pour choice.

Pete

Sounds like you'll need a new keyboard, if your liquid assets allow it!