FGFS-4.1/simgear
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Tweaked the example a bit.

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curt 1998-09-25 16:01:19 +00:00
parent 1b99b2a25d
commit 62e85640da
1 changed files with 18 additions and 7 deletions
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23
example/example.cxx
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@ -55,8 +55,13 @@ int main ()
int tim = 0 ; /* My periodic event timer. */
slEnvelope pitch_envelope ( 3, SL_SAMPLE_LOOP ) ;
slEnvelope p_envelope ( 1, SL_SAMPLE_ONE_SHOT ) ;
slEnvelope volume_envelope ( 3, SL_SAMPLE_LOOP ) ;
while ( SL_TRUE )
{
tim++ ; /* Time passes */
if ( tim % 200 == 0 ) sched.playSample ( s1 ) ;
@ -64,16 +69,22 @@ int main ()
if ( tim % 150 == 0 ) sched.playSample ( s3 ) ;
if ( tim % 120 == 0 ) sched.playSample ( s4 ) ;
if ( tim == 300 ) {
if ( tim == 60 ) {
// introduce an envelope for our engine noise after 10 seconds
slEnvelope my_envelope ( 2, SL_SAMPLE_LOOP ) ;
my_envelope.setStep ( 0, 0.0, 1.0 ) ;
my_envelope.setStep ( 1, 10.0, 2.0 ) ;
my_envelope.setStep ( 2, 20.0, 1.0 ) ;
pitch_envelope.setStep ( 0, 0.0, 1.0 ) ;
pitch_envelope.setStep ( 1, 5.0, 2.0 ) ;
pitch_envelope.setStep ( 2, 10.0, 1.0 ) ;
p_envelope.setStep ( 0, 5.0, 2.0 ) ;
volume_envelope.setStep ( 0, 0.0, 1.0 ) ;
volume_envelope.setStep ( 1, 5.0, 2.0 ) ;
volume_envelope.setStep ( 2, 10.0, 1.0 ) ;
// scheduler -> playSample ( my_sample ) ;
sched.addSampleEnvelope ( s, 0, 0, &my_envelope, SL_PITCH_ENVELOPE ) ;
sched.addSampleEnvelope( s, 0, 0, &p_envelope, SL_PITCH_ENVELOPE );
sched.addSampleEnvelope( s, 0, 1, &volume_envelope, SL_VOLUME_ENVELOPE);
}