X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=example%2Fexample.cxx;h=f12ca2939089f7c3254c8be25f05eb695becd93c;hb=62e85640da0793941648560078d76ec68bc12608;hp=ae519786d935f8e1440c9ab5e6d60c38d67de1ac;hpb=fca7a8fa47b60fb80108d4302c11872c05020331;p=simgear.git

diff --git a/example/example.cxx b/example/example.cxx
index ae519786..f12ca293 100644
--- a/example/example.cxx
+++ b/example/example.cxx
@@ -55,15 +55,39 @@ 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 */
+
+   tim++ ;  /* Time passes */
 
     if ( tim % 200 == 0 ) sched.playSample ( s1 ) ;
     if ( tim % 180 == 0 ) sched.playSample ( s2 ) ;
     if ( tim % 150 == 0 ) sched.playSample ( s3 ) ;
     if ( tim % 120 == 0 ) sched.playSample ( s4 ) ;
 
+    if ( tim == 60 ) {
+	// introduce an envelope for our engine noise after 10 seconds
+
+	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, &p_envelope, SL_PITCH_ENVELOPE );
+	sched.addSampleEnvelope( s, 0, 1, &volume_envelope, SL_VOLUME_ENVELOPE);
+    }
+
+
     /*
       For the sake of realism, I'll delay for 1/30th second to
       simulate a graphics update process.