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change the audio rolloff function

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This commit is contained in:
Stephen Birarda 2014-07-03 13:46:38 -07:00
parent c0d0ca5066
commit 04e7df1a3f
1 changed files with 12 additions and 6 deletions
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18
assignment-client/src/audio/AudioMixer.cpp
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@ -166,12 +166,18 @@ void AudioMixer::addBufferToMixForListeningNodeWithBuffer(PositionalAudioRingBuf
glm::vec3 rotatedSourcePosition = inverseOrientation * relativePosition; glm::vec3 rotatedSourcePosition = inverseOrientation * relativePosition;
// calculate the distance coefficient using the distance to this node if (distanceBetween >= ATTENUATION_BEGINS_AT_DISTANCE) {
float distanceCoefficient = 1 - (logf(distanceBetween / ATTENUATION_BEGINS_AT_DISTANCE) / logf(2.0f) // calculate the distance coefficient using the distance to this node
* ATTENUATION_AMOUNT_PER_DOUBLING_IN_DISTANCE); float distanceCoefficient = 1 - (logf(distanceBetween / ATTENUATION_BEGINS_AT_DISTANCE) / logf(2.0f)
* ATTENUATION_AMOUNT_PER_DOUBLING_IN_DISTANCE);
// multiply the current attenuation coefficient by the distance coefficient
attenuationCoefficient *= distanceCoefficient; if (distanceCoefficient < 0) {
distanceCoefficient = 0;
}
// multiply the current attenuation coefficient by the distance coefficient
attenuationCoefficient *= distanceCoefficient;
}
// project the rotated source position vector onto the XZ plane // project the rotated source position vector onto the XZ plane
rotatedSourcePosition.y = 0.0f; rotatedSourcePosition.y = 0.0f;