/// <summary>
/// 初期設定する
/// </summary>
/// <param name="room"></param>
public void Start(WWRoom room)
{
var leftEarPos = room.ListenerEarPos(0);
var rightEarPos = room.ListenerEarPos(1);
var leftSpeakerPos = room.SpeakerPos(0);
var rightSpeakerPos = room.SpeakerPos(1);
// 左スピーカーから左の耳に音が届く
var ll = leftEarPos - leftSpeakerPos;
var llN = ll;
llN.Normalize();
// エネルギーは、距離の2乗に反比例する
// 振幅は、距離の1乗に反比例
// ということにする。
mLeftSpeakerToLeftEar.Add(new WWFirCoefficient(ll.Length / SoundSpeed, llN, 1.0 / ll.Length, true));
// 右スピーカーから右の耳に音が届く
var rr = rightEarPos - rightSpeakerPos;
var rrN = rr;
rrN.Normalize();
mRightSpeakerToRightEar.Add(new WWFirCoefficient(rr.Length / SoundSpeed, rrN, 1.0 / rr.Length, true));
double gain = 1.0;
if (WallReflectionType == ReflectionType.Specular)
{
// なんとなく、高音は逆の耳に届きにくい感じ。
gain = 1.0 / 1.414;
}
// 左スピーカーから右の耳に音が届く。
// 振幅が-3dBくらいになる。
double attenuationDecibel = -3.0;
double attenuationMagnitude = Math.Pow(10.0, attenuationDecibel / 20.0);
var lr = rightEarPos - leftSpeakerPos;
var lrN = lr;
lrN.Normalize();
mLeftSpeakerToRightEar.Add(new WWFirCoefficient(lr.Length / SoundSpeed, lrN, gain * attenuationMagnitude / lr.Length, true));
var rl = leftEarPos - rightSpeakerPos;
var rlN = rl;
rlN.Normalize();
mRightSpeakerToLeftEar.Add(new WWFirCoefficient(rl.Length / SoundSpeed, rlN, gain * attenuationMagnitude / rl.Length, true));
// 1本のレイがそれぞれのスピーカーリスナー組に入る。
mRouteCount[0] = 1;
mRouteCount[1] = 1;
}
private double CalcRouteDistance(WWRoom room, int speakerCh, WWRoute route, WWLineSegment lastSegment, Point3D hitPos)
{
var speakerToHitPos = hitPos - room.SpeakerPos(speakerCh);
double distance = speakerToHitPos.Length;
for (int i = 0; i < route.Count(); ++i)
{
var lineSegment = route.GetNth(i);
distance += lineSegment.Length;
}
distance += lastSegment.Length;
return(distance);
}
private void RedrawRoom()
{
DrawModel(mRoom.RoomModel, Matrix3D.Identity, new SolidColorBrush(Colors.White));
Matrix3D listenerMatrix = new Matrix3D();
listenerMatrix.Translate((Vector3D)mRoom.ListenerPos);
DrawModel(mRoom.ListenerModel, listenerMatrix, new SolidColorBrush(Colors.Gray));
for (int i = 0; i < WWRoom.NUM_OF_SPEAKERS; ++i)
{
var pos = mRoom.SpeakerPos(i);
var dir = mRoom.SpeakerDir(i);
Vector3D posV = new Vector3D(pos.X, pos.Y, pos.Z);
Vector3D at = new Vector3D(pos.X + dir.X, pos.Y + dir.Y, pos.Z + dir.Z);
Vector3D up = new Vector3D(0.0, 1.0, 0.0);
Matrix3D speakerMatrixInv = WWMatrixUtil.CalculateLookAt(posV, at, up);
var speakerMatrix = speakerMatrixInv;
speakerMatrix.Invert();
DrawModel(mRoom.SpeakerModel, speakerMatrix, new SolidColorBrush(Colors.Gray));
}
}
private double CalcReflectionGain(ReflectionType type, WWRoom room, int speakerCh, Point3D hitPos, Vector3D rayDir, Vector3D hitSurfaceNormal)
{
if (type == ReflectionType.Diffuse)
{
// Lambert's cosine law
return(Vector3D.DotProduct(-rayDir, hitSurfaceNormal));
}
// specular
var reflectionDir = SpecularReflection(rayDir, hitSurfaceNormal);
var speakerDir = room.SpeakerPos(speakerCh) - hitPos;
speakerDir.Normalize();
var dot = Vector3D.DotProduct(reflectionDir, speakerDir);
return(Math.Pow(Saturate0to1(dot), SPECULAR_HARDNESS));
}
private double CalcRouteDistance(WWRoom room, int speakerCh, WWRoute route, WWLineSegment lastSegment, Point3D hitPos)
{
var speakerToHitPos = hitPos - room.SpeakerPos(speakerCh);
double distance = speakerToHitPos.Length;
for (int i = 0; i < route.Count(); ++i) {
var lineSegment = route.GetNth(i);
distance += lineSegment.Length;
}
distance += lastSegment.Length;
return distance;
}
private double CalcReflectionGain(ReflectionType type, WWRoom room, int speakerCh, Point3D hitPos, Vector3D rayDir, Vector3D hitSurfaceNormal)
{
if (type == ReflectionType.Diffuse) {
// Lambert's cosine law
return Vector3D.DotProduct(-rayDir, hitSurfaceNormal);
}
// specular
var reflectionDir = SpecularReflection(rayDir, hitSurfaceNormal);
var speakerDir = room.SpeakerPos(speakerCh) - hitPos;
speakerDir.Normalize();
var dot = Vector3D.DotProduct(reflectionDir, speakerDir);
return Math.Pow(Saturate0to1(dot), SPECULAR_HARDNESS);
}
/// <summary>
/// 初期設定する
/// </summary>
/// <param name="room"></param>
public void Start(WWRoom room)
{
var leftEarPos = room.ListenerEarPos(0);
var rightEarPos = room.ListenerEarPos(1);
var leftSpeakerPos = room.SpeakerPos(0);
var rightSpeakerPos = room.SpeakerPos(1);
// 左スピーカーから左の耳に音が届く
var ll = leftEarPos - leftSpeakerPos;
var llN = ll;
llN.Normalize();
// エネルギーは、距離の2乗に反比例する
// 振幅は、距離の1乗に反比例
// ということにする。
mLeftSpeakerToLeftEar.Add(new WWFirCoefficient(ll.Length / SoundSpeed, llN, 1.0 / ll.Length, true));
// 右スピーカーから右の耳に音が届く
var rr = rightEarPos - rightSpeakerPos;
var rrN = rr;
rrN.Normalize();
mRightSpeakerToRightEar.Add(new WWFirCoefficient(rr.Length / SoundSpeed, rrN, 1.0 / rr.Length, true));
double gain = 1.0;
if (WallReflectionType == ReflectionType.Specular) {
// なんとなく、高音は逆の耳に届きにくい感じ。
gain = 1.0/1.414;
}
// 左スピーカーから右の耳に音が届く。
// 振幅が-3dBくらいになる。
double attenuationDecibel = -3.0;
double attenuationMagnitude = Math.Pow(10.0, attenuationDecibel / 20.0);
var lr = rightEarPos - leftSpeakerPos;
var lrN = lr;
lrN.Normalize();
mLeftSpeakerToRightEar.Add(new WWFirCoefficient(lr.Length / SoundSpeed, lrN, gain * attenuationMagnitude / lr.Length, true));
var rl = leftEarPos - rightSpeakerPos;
var rlN = rl;
rlN.Normalize();
mRightSpeakerToLeftEar.Add(new WWFirCoefficient(rl.Length / SoundSpeed, rlN, gain * attenuationMagnitude / rl.Length, true));
// 1本のレイがそれぞれのスピーカーリスナー組に入る。
mRouteCount[0] = 1;
mRouteCount[1] = 1;
}