Vertical Line Clear

[Jedd]

With the Line( command you can draw a line or erase it by placing a 0 after the X,Y,X,Y coordinates. If i want to clear an entire vertical (or horizontal) line, do I have to use a really big line (Line(30,-100,30,100,0) or can I somehow use the Vertical line command to do this? I tried Vertical 30, 0, but it didn't work.

[DarkerLine]

I think the only way is Line(30,Ymin,30,Ymax,0). Oh, and are the Vertical/Horizontal commands faster than corresponding Line( commands?

[Jedd]

I never even thought of using Xmax and Ymax to draw lines. Pretty obvious now that you mention it. Thanks robin!

[Spyderbyte]

[Arcane Wizard]

With the Line statement the calc has to use 4 inputted variables, with the Vertical or Horizontal statements there is only 1, the rest is part of the function (assembly code). In most cases this means the latter is faster.

[DarkerLine]

I checked it: the Line command is 55% slower... But it can turn off the pixels!

[Jedd]

How did you get 55%?

[Arcane Wizard]

Time both methods and calculate how much of the faster the slower is slower.

example:
line: 15,5 secs
horizontal: 10 secs

15,5/10*100%=155% hence line is 55% slower.

[Jedd]

Oh ok. But im assuming you obviously drew line and horizontal multiple times? Because it doesnt take my calculator 15 seconds to draw a horizontal line...

[Arcane Wizard]

For(X,1,250
Line(0,31,94,31
End

For(X,1,250
Vertical 31
End

[Jedd]

gotcha

[DarkerLine]

I never said anything about 15 seconds. I just drew each once, estimated the Line( speed at 51,67 milliseconds and the Vertical speed at 33,33 milliseconds, then divided and converted to a percent.

[Arcane Wizard]

[DarkerLine]

I was talking about Jedd's post.