Mirrors/overte-HifiExperiments
3
0
Fork 0
mirror of https://github.com/HifiExperiments/overte.git synced 2025-08-09 04:08:55 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

correct spatialization and off-axis attenuation for a spherical source

Browse source
This commit is contained in:
Stephen Birarda 2013-06-04 16:44:01 -07:00
parent e07c55ec43
commit c5d3365f3e
1 changed files with 15 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
audio-mixer/src/main.cpp
View file

@ -150,8 +150,8 @@ int main(int argc, const char* argv[]) {
if (otherAgent != agent) {
glm::vec3 listenerPosition = agentRingBuffer->getPosition();
glm::vec3 relativePosition = otherAgentBuffer->getPosition() - agentRingBuffer->getPosition();
glm::vec3 rotatedSourcePosition = glm::inverse(agentRingBuffer->getOrientation())
* relativePosition;
glm::quat inverseOrientation = glm::inverse(agentRingBuffer->getOrientation());
glm::vec3 rotatedSourcePosition = inverseOrientation * relativePosition;
float distanceSquareToSource = glm::dot(relativePosition, relativePosition);
@ -171,14 +171,25 @@ int main(int argc, const char* argv[]) {
// and the position of the source by the radius to get the
// closest point on the boundary of the sphere to the source
glm::vec3 closestPoint = glm::normalize(relativePosition) * otherAgentBuffer->getRadius();
glm::vec3 closestPoint = glm::normalize(-relativePosition) * otherAgentBuffer->getRadius();
// for the other calculations the agent position is the closest point on the sphere
rotatedSourcePosition = closestPoint;
rotatedSourcePosition = inverseOrientation * -closestPoint;
// ovveride the distance to the agent with the distance to the point on the
// boundary of the sphere
distanceSquareToSource = glm::distance2(listenerPosition, closestPoint);
} else {
// calculate the angle delivery
glm::vec3 rotatedListenerPosition = glm::inverse(otherAgentBuffer->getOrientation())
* relativePosition;
float angleOfDelivery = glm::angle(glm::vec3(0.0f, 0.0f, 1.0f),
glm::normalize(rotatedListenerPosition));
offAxisCoefficient = MAX_OFF_AXIS_ATTENUATION +
(OFF_AXIS_ATTENUATION_FORMULA_STEP * (angleOfDelivery / 90.0f));
}
const float DISTANCE_SCALE = 2.5f;
@ -205,15 +216,6 @@ int main(int argc, const char* argv[]) {
glm::normalize(rotatedSourcePosition),
glm::vec3(0.0f, 1.0f, 0.0f));
// calculate the angle delivery
glm::vec3 rotatedListenerPosition = glm::inverse(otherAgentBuffer->getOrientation())
* relativePosition;
float angleOfDelivery = glm::angle(glm::vec3(0.0f, 0.0f, 1.0f),
glm::normalize(rotatedListenerPosition));
offAxisCoefficient = MAX_OFF_AXIS_ATTENUATION
+ (OFF_AXIS_ATTENUATION_FORMULA_STEP * (angleOfDelivery / 90.0f));
float sinRatio = fabsf(sinf(glm::radians(bearingRelativeAngleToSource)));
numSamplesDelay = PHASE_DELAY_AT_90 * sinRatio;