sound panning 360 degrees in BGT working example and code
So, going to try this again. The previous code was rittled with mathematical errors, woops. Anyway, everything is fixed and I went ahead and commented out the function, if you don't understand sine cosine and arc_tangent, it won't help you much though, but it works now, I promise!
void thetaPos(double soundA, double soundB, sound@ SoundHandle, double myA, double myB, double myTheta)
{
//initialize our variables.
double absolutetheta;
double relativetheta;
double tempH;
double tempV;
double tVolume;
//find the lengths of the triangle we make to find the distance between our listener and the sound.
double temp1 = soundA-myA;
double temp2 = myB-soundB;
double d1=power(temp1, 2);
double d2=power(temp2,2);
//use distance formula
double d=square_root(d1+d2);
//if the distance we got is less than 75.
if(d<75)
{
//play our sound looped.
SoundHandle.play_looped();
if(temp1==0 && temp2==0) absolutetheta=-1;
if(temp2==0)
{
if(soundA>myA) absolutetheta=0;
if(soundA<myA) absolutetheta=180;
}
if(temp2>0)
{
absolutetheta=arc_tangent(temp1/temp2);
}
if(temp2<0)
{
absolutetheta=arc_tangent(temp1/temp2)+pi;
}
absolutetheta = (absolutetheta*180/pi)-90;
//Find our relative angle.
relativetheta = absolutetheta -myTheta-90;
if(relativetheta>359.999)
{
relativetheta+=-360;
}
if(relativetheta<0)
{
relativetheta+=360;
}
if(key_pressed(KEY_J))
{
alert("absolute", absolutetheta);
}
if(key_pressed(KEY_K))
{
alert("relative", relativetheta);
}
//Cosine is adgacent
tempH=cosine(((relativetheta-90)*pi/180));
//Use the value from above to pan our sound.
SoundHandle.pan=tempH*
100;
//Find our verticle measurement. Don't need to convert this one, <0 is in front, > is behind.
tempV=sine(((relativetheta-90)*pi/180));
tVolume=(d*-100)/75;
//if our sound is behind us.
if(tempV>0)
{
//Reduce the sound by a number between 0 and 10 based on how far to the left or right the sound is.
SoundHandle.volume=tVolume-5-(absolute(tempH)*20);
//Find the absolute value of our horizontal value and use that to pitch bend our sound as it pans across the stereo field. As the sound moves away from 0 (centered). it will gradually decrease in pitch, as it approaches centered, it will raise in pitch.
SoundHandle.pitch=100+absolute(tempH*5);
}
else
{
//Same as above, except raise the pitch as the sound is centered rather than decrease.
SoundHandle.volume=tVolume+15-(absolute(tempH)*20);
SoundHandle.pitch=120-absolute(te
mpH*20);
}
}
else
{
//If the distance is greater than 75 pause the sound.
SoundHandle.pause();
}
}
Here's the example.
const double pi=3.141592653589793;
double x=0;
double degrees=270;
double y=0;
double soundx=10;
double soundy=10;
sound test;
void main()
{
show_game_window("test");
test.load("sounds/EnemyTeamMate.ogg");
test.play_looped();
do
{
if(key_pressed(KEY_S))
{
degrees-=180;
}
if(key_pressed(KEY_SPACE))
{
alert("HI", degrees);
}
if(key_down(KEY_RIGHT))
{
degrees+=.2;
}
if(key_down(KEY_LEFT))
{
degrees+=-.2;
}
if(degrees>359.95)
{
degrees=0;
}
if(degrees<0)
{
degrees=359.95;
}
thetaPos(soundx, soundy, test, x, y, degrees);
wait(5);
}
while(!key_pressed(KEY_ESCAPE));
}
Anyway, sorry for posting a dud earlier. This has been tested, please let me know if you find anything wrong with it.
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