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pt_lights: softly fade in and out the blinking lights

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This commit is contained in:
Christian Schmitt 2012-09-14 16:31:42 +02:00
parent 2906a2d007
commit e4dacaf0d2
1 changed files with 13 additions and 13 deletions
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26
simgear/scene/tgdb/pt_lights.cxx
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@ -551,24 +551,24 @@ SGLightFactory::getHoldShort(const SGDirectionalLightBin& lights)
sg_srandom(unsigned(lights.getLight(0).position[0]));
float flashTime = 2 + 0.1 * sg_random();
osg::Sequence* sequence = new osg::Sequence;
sequence->setDefaultTime(flashTime);
Effect* effect = getLightEffect(6, osg::Vec3(1, 0.001, 0.000002),
0, 6, true);
// Lights on
EffectGeode* egeode = new EffectGeode;
for (int i = lights.getNumLights(); 0 <= i; --i) {
egeode->setEffect(effect);
egeode->addDrawable(getLightDrawable(lights.getLight(i)));
}
sequence->addChild(egeode, flashTime);
// Lights off
// start with lights off
sequence->addChild(new osg::Group, flashTime);
// ...and increase the lights in steps
for (int i = 2; i < 7; i+=2) {
Effect* effect = getLightEffect(i, osg::Vec3(1, 0.001, 0.000002),
0, i, true);
EffectGeode* egeode = new EffectGeode;
for (unsigned int j = 0; j < lights.getNumLights(); ++j) {
egeode->addDrawable(getLightDrawable(lights.getLight(j)));
egeode->setEffect(effect);
}
sequence->addChild(egeode, (i==6) ? flashTime : 0.1);
}
sequence->setInterval(osg::Sequence::LOOP, 0, -1);
sequence->setInterval(osg::Sequence::SWING, 0, -1);
sequence->setDuration(1.0f, -1);
sequence->setMode(osg::Sequence::START);
sequence->setSync(true);
return sequence;
}