PLAYMUSIC WITH LAG and IMAGE BORDERS

[galiksoft]

Hi people.

I'm developping a bombs game but I found 2 problems.

I use a background music (mp3), a clock tik-tok when the bomb's time remaing counter is above 2 seconds, but when it reaches 2 seconds, the music must change to a fast alarm, i.e, another mp3 file. The sounds changes well, but at the change's moment, the mouse pointer disappear for a while and after that, it appear in another screen position. It seems like a lag caused by the music change.
I used STOPMUSIC before PLAYMUSIC "second_file.mp3" and I thought the problem was it; after I removed STOPMUSIC command, and the problem wasn't solved.
To make sure, the problem is not caused by my game code, I has a version with no sounds, so no calls to playmusic...and there are no problems!
How can I solve this problem?


Second Problem:
I use polyvector commands to draw the sprites. My sprites are pngs with transparency. I use this function:

Code (glbasic) Select Expand


FUNCTION draw: polis%, xxx%, yyy%, mode, dimx%=0, dimy%=0
LOCAL originx%, originy%

GETSPRITESIZE polis, originx, originy

IF mode>0
dimx=mode*originx/100
dimy=mode*originy/100
ENDIF

STARTPOLY polis
POLYVECTOR xxx, yyy, 0, 0, RGB(255, 255, 255)
POLYVECTOR xxx, yyy + dimy, 0, originy, RGB (255, 255, 255)
POLYVECTOR xxx + dimx, yyy + dimy, originx, originy, RGB(255, 255, 255)
POLYVECTOR xxx + dimx, yyy,  originx,  0, RGB(255, 255, 255)
ENDPOLY
ENDFUNCTION


The images are drawn at right positions with right zoom, but they appear with a white border. I removed the ", RGB(255, 255, 255)" part, but the borders are still there... I don't want any border. I just want the visible part of the png, with no borders!
Help me please

[Ian Price]

Don't know about the .MP3 problem, but .MP3 files take a short time to seek as they are not loaded like .WAV files. Can you not make the last two seconds of music a .WAV file and play that as required? It gets around the issue.

Use SMOOTHSHADING FALSE before using the polyvector commands to eradicate the border.

[galiksoft]

Thanks.

I'm going to convert to wav format, and use that command.

[Hemlos]

Did smoothshading work?
Make sure the image dimensions are powers of 2(32,64,128,etc)
Opengl is picky, in both 2d and 3d.

[Wampus]

If the source image for the Polyvectors is already a power of 2, is the white border problem the same as this one? http://answers.unity3d.com/questions/10302/messy-alpha-problem-white-around-edges.html

I suspect it is, from your description. The above discussion might be helpful. If you use Photoshop then the discussion also mentions a filter you can install to help with the white borders problem.