drawimage problems

-=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- (c) WidthPadding Industries 1987 0\|53\|0 -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=- -=+=-
Socoder -> Blitz -> drawimage problems
Mon, 22 Dec 2008, 15:13
:-}	Graphics 800,600 AutoMidHandle True SetBuffer BackBuffer() Global background = LoadImage("smile.bmp") Global l = 0 While Not l = 1 Cls drawsmile() Wend End Function drawsmile() DrawImage background, 400,300 ; ; ; End Function --v For some reason beyond my knowledge, when i run this program all i get is a black screen. I am not new to BB and don't see a probllem with this code. Maybe I am not looking correctly coudl someone help me?
Mon, 22 Dec 2008, 15:24
Phoenix	Works fine over here. You sure you supplied the correct file path? Is it in the right format; BMP, JPG or PNG? Try adding Flip() just before Cls, or add this right after the LoadImage line: If(background = 0) Then RuntimeError("Failed to load background.") --v See if it produces an error.
Mon, 22 Dec 2008, 15:34
Evil Roy Ferguso	As Phoenix said, you need a Flip either before your Cls or before your Wend. With double buffered graphics, nothing will be displayed on-screen until Flip. On some computers, when a program is run windowed, the display might update even when Flip is absent - which may be why the program worked for Phoenix. Just add it and you've nothing to worry about. A minor style point -- in some fonts, 'l' and '1' look practically the same. I spent a moment myself trying to figure out why you were comparing 1 with itself.
Mon, 22 Dec 2008, 15:40
:-}	The flip worked wonderfully. Looking at my past programs I do have that in there. My mistake. Many thanks. as for my variable l. This is just a rough outline of a program to come many things will change. Thanks again i look forward to learning alot here.
Mon, 22 Dec 2008, 17:03
JL235	I is ok to use but it's a convention to use i (and j and k) for the index value in a loop. i.e. for i = 0 to 10 next --v You'll find this convention used right across programming languages so I would suggest you follow it. In the place where your using i I'd also suggest calling it 'running' or 'isRunning' instead and set it to true. i.e. global isRunning = true while isRunning runMyCode() wend --v IMHO: 'while isRunning' expresses what the code is doing in a more natural way then 'while not i = 1'.
Mon, 22 Dec 2008, 19:52
:-}	actually i was using a lowercase "L" and as I said before this is just a rough beginning of a future function for a project I am working on.