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Implemented KRAudioManager::setListenerOrientation

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Implemented KRAudioManager::setListenerOrientationFromModelMatrix
Implemented KRAudioManager::getListenerForward
Implemented KRAudioManager::getListenerUp
Implemented KRAudioManager::getListenerPosition

Listener position and orientation are no longer automatically coupled to the camera's model matrix, and must be set manually using these new functions.
This commit is contained in:
Kearwood Gilbert
2013-02-21 11:21:18 -08:00
parent 3e0e223b66
commit 69506798c2
3 changed files with 45 additions and 18 deletions
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53
KREngine/kraken/KRAudioManager.cpp
View File

@@ -36,6 +36,7 @@
#include "KRAudioBuffer.h"
#include "KRContext.h"
#include "KRVector2.h"
#include "KRCollider.h"
#include <Accelerate/Accelerate.h>
OSStatus alcASASetListenerProc(const ALuint property, ALvoid *data, ALuint dataSize);
@@ -1071,18 +1072,36 @@ void KRAudioManager::makeCurrentContext()
}
}
void KRAudioManager::setViewMatrix(const KRMat4 &viewMatrix)
void KRAudioManager::setListenerOrientationFromModelMatrix(const KRMat4 &modelMatrix)
{
KRMat4 invView = viewMatrix;
invView.invert();
m_listener_position = KRMat4::Dot(invView, KRVector3(0.0, 0.0, 0.0));
m_listener_forward = KRMat4::Dot(invView, KRVector3(0.0, 0.0, -1.0)) - m_listener_position;
m_listener_up = KRMat4::Dot(invView, KRVector3(0.0, 1.0, 0.0)) - m_listener_position;
m_listener_up.normalize();
m_listener_forward.normalize();
setListenerOrientation(
KRMat4::Dot(modelMatrix, KRVector3(0.0, 0.0, 0.0)),
KRVector3::Normalize(KRMat4::Dot(modelMatrix, KRVector3(0.0, 0.0, -1.0)) - m_listener_position),
KRVector3::Normalize(KRMat4::Dot(modelMatrix, KRVector3(0.0, 1.0, 0.0)) - m_listener_position)
);
}
KRVector3 &KRAudioManager::getListenerForward()
{
return m_listener_forward;
}
KRVector3 &KRAudioManager::getListenerPosition()
{
return m_listener_position;
}
KRVector3 &KRAudioManager::getListenerUp()
{
return m_listener_up;
}
void KRAudioManager::setListenerOrientation(const KRVector3 &position, const KRVector3 &forward, const KRVector3 &up)
{
m_listener_position = position;
m_listener_forward = forward;
m_listener_up = up;
makeCurrentContext();
if(m_audio_engine == KRAKEN_AUDIO_OPENAL) {
ALDEBUG(alListener3f(AL_POSITION, m_listener_position.x, m_listener_position.y, m_listener_position.z));
@@ -1253,12 +1272,20 @@ void KRAudioManager::renderHRTF()
KRAudioSource *source = *itr;
KRAudioSample *source_sample = source->getAudioSample();
if(source_sample) {
KRVector3 source_listener_space = KRMat4::Dot(inv_listener_mat, source->getWorldTranslation());
KRVector3 source_world_position = source->getWorldTranslation();
KRVector3 source_listener_space = KRMat4::Dot(inv_listener_mat, source_world_position);
KRVector3 source_dir = KRVector3::Normalize(source_listener_space);
float distance = source_listener_space.magnitude();
float gain = source->getGain() * m_global_gain / pow(KRMAX(distance / source->getReferenceDistance(), 1.0f), source->getRolloffFactor());
if(source->getEnableOcclusion() && false) {
KRHitInfo hitinfo;
if(source->getScene().lineCast(m_listener_position, source_world_position, hitinfo, KRAKEN_COLLIDER_AUDIO)) {
gain = 0.0f;
}
}
float azimuth = atan2(source_dir.x, source_dir.z);
float elevation = atan( source_dir.y / sqrt(source_dir.x * source_dir.x + source_dir.z * source_dir.z));

7
KREngine/kraken/KRAudioManager.h
View File

@@ -64,8 +64,11 @@ public:
KRAudioSample *load(const std::string &name, const std::string &extension, KRDataBlock *data);
KRAudioSample *get(const std::string &name);
void setViewMatrix(const KRMat4 &viewMatrix);
void setListenerOrientation(const KRVector3 &position, const KRVector3 &forward, const KRVector3 &up);
void setListenerOrientationFromModelMatrix(const KRMat4 &modelMatrix);
KRVector3 &getListenerForward();
KRVector3 &getListenerPosition();
KRVector3 &getListenerUp();
void makeCurrentContext();

3
KREngine/kraken/KRCamera.cpp
View File

@@ -69,9 +69,6 @@ void KRCamera::renderFrame(float deltaTime, GLint renderBufferWidth, GLint rende
KRMat4 viewMatrix = KRMat4::Invert(getModelMatrix());
getContext().getAudioManager()->setViewMatrix(viewMatrix); // FINDME, TODO - Should we support de-coupling the audio listener location from the camera?
settings.setViewportSize(KRVector2(backingWidth, backingHeight));
KRMat4 projectionMatrix;