@@ -39,7 +39,8 @@ class SpatialAudioMain: BaseViewController {
3939 }
4040
4141 func setupUI( ) {
42- infoLabel. stringValue = " 请插入耳机体验3d音效效果 " . localized
42+ infoLabel. stringValue = " Please insert headphones to experience the spatial audio effect " . localized
43+ startButton. title = " Start " . localized
4344
4445 let panGesture = NSPanGestureRecognizer ( target: self , action: #selector( panGestureChanged) )
4546 self . soundSourceView. addGestureRecognizer ( panGesture)
@@ -63,10 +64,12 @@ class SpatialAudioMain: BaseViewController {
6364 self . peopleView. isHidden = false
6465 self . soundSourceView. isHidden = false
6566 } else {
66- self . infoLabel. stringValue = " 你会听到一段音乐, \( self . downCount - timeout) 秒后这段音乐会通过空间音效的方式播放 "
67+ let text = " You will hear a piece of music, and after 10 seconds this piece of music will be played through spatial audio effects " . localized
68+ self . infoLabel. stringValue = " \( text) ( \( self . downCount - timeout) ) "
6769 }
6870 } else {
69- self . infoLabel. stringValue = " 现在您可以移动喇叭图标到不同的位置, 体验空间音效效果( \( self . downCount) ) " . localized
71+ let text = " Now you can move the speaker icon to experience the spatial audio effect " . localized
72+ self . infoLabel. stringValue = " \( text) ( \( self . downCount) ) "
7073 if self . downCount == 0 {
7174 self . agoraKit. stopEchoTest ( )
7275 self . agoraKit. enableSpatialAudio ( false )
@@ -75,56 +78,56 @@ class SpatialAudioMain: BaseViewController {
7578 self . peopleView. isHidden = true
7679 self . soundSourceView. isHidden = true
7780 self . startButton. isHidden = false
78- self . infoLabel. stringValue = " 请插入耳机体验空间音效效果 " . localized
81+ self . infoLabel. stringValue = " Please insert headphones to experience the spatial audio effect " . localized
7982 }
8083 }
8184 }
8285 }
8386
8487 @objc func panGestureChanged( gesture: NSPanGestureRecognizer ) {
85- let circleCenter = CGPoint ( x: NSMidX ( self . peopleView. frame) , y: NSMidY ( self . peopleView. frame) )
8688 let move = gesture. translation ( in: self . view)
87- var newCenter = CGPoint ( x: NSMidX ( gesture. view!. frame) , y: NSMidY ( gesture. view!. frame) )
88- newCenter = CGPoint ( x: newCenter. x + move. x, y: newCenter. y + move. y)
89-
90- let deltaX = newCenter. x - circleCenter. x
91- let deltaY = newCenter. y - circleCenter. y
92- if deltaX == 0 { return }
93-
94- // In spatial audio, angle is range [0, 360], it is angle 0 when at Y direction.
95- let tanValue = abs ( deltaY) / abs( deltaX)
96- let tanAngle = atan ( tanValue) * 180.0 / Double. pi
97- var spatialAngle = 0.0
98- if deltaX > 0 && deltaY > 0 { // scope I
99- spatialAngle = 270.0 + tanAngle
100- } else if deltaX < 0 && deltaY > 0 { // scope II
101- spatialAngle = 90.0 - tanAngle
102- } else if deltaX < 0 && deltaY < 0 { // scope III
103- spatialAngle = 90.0 + tanAngle
104- } else if deltaX > 0 && deltaY < 0 { // scope IV
105- spatialAngle = 270.0 - tanAngle
106- }
89+ var objectCenter = CGPoint ( x: NSMidX ( gesture. view!. frame) , y: NSMidY ( gesture. view!. frame) )
90+ objectCenter = CGPoint ( x: objectCenter. x + move. x, y: objectCenter. y + move. y)
10791
92+ let width = soundSourceView. frame. size. width
93+ soundSourceView. frame = CGRect ( origin: CGPoint ( x: objectCenter. x - width / 2.0 , y: objectCenter. y - width / 2.0 ) , size: CGSize ( width: width, height: width) )
94+ gesture. setTranslation ( . zero, in: self . view)
95+
10896 if gesture. state == . ended {
109- let L = sqrt ( deltaX * deltaX + deltaY * deltaY)
110- let maxL = ( NSScreen . main? . frame. height) ! / 2.0
111- let maxSpatailDistance = 30.0
112- let spatialDistance = L * maxSpatailDistance / maxL
113- currentAngle = spatialAngle
114- currentDistance = spatialDistance
115-
116- self . updateRemoteUserSpatialAudioPositon ( )
97+ updatePosition ( objectCenter: objectCenter)
11798 }
118-
119- let width : CGFloat = self . soundSourceView. frame. size. width
120- self . soundSourceView. frame = CGRect ( origin: CGPoint ( x: newCenter. x - width / 2.0 , y: newCenter. y - width / 2.0 ) , size: CGSize ( width: width, height: width) )
121- gesture. setTranslation ( . zero, in: self . view)
12299 }
123100
101+ func updatePosition( objectCenter: CGPoint ) {
102+ let circleCenter = CGPoint ( x: NSMidX ( peopleView. frame) , y: NSMidY ( peopleView. frame) )
103+ let deltaX = objectCenter. x - circleCenter. x
104+ let deltaY = objectCenter. y - circleCenter. y
105+ let R = sqrt ( deltaX * deltaX + deltaY * deltaY)
106+
107+ // In spatial audio, angle is range [0, 360], it is angle 0 when at Y direction with anti-clockwise
108+ let TwoPI = Double . pi * 2.0
109+ let cosAngle = acos ( deltaX / R)
110+ let mathAngle = deltaY > 0 ? cosAngle : ( TwoPI - cosAngle)
111+ var spatialAngle = mathAngle - TwoPI / 4.0
112+ if spatialAngle < 0 {
113+ spatialAngle = TwoPI + spatialAngle
114+ }
115+
116+ currentAngle = spatialAngle
117+ currentDistance = R
118+ self . updateRemoteUserSpatialAudioPositon ( )
119+ }
120+
124121 func updateRemoteUserSpatialAudioPositon( ) {
122+ let maxR = self . view. frame. height / 2.0
123+
124+ let maxSpatailDistance = 30.0
125+ let spatialDistance = currentDistance * maxSpatailDistance / maxR
126+ let spatialAngle = currentAngle * 180.0 / Double. pi
127+
125128 let spatialParams = AgoraSpatialAudioParams ( )
126- spatialParams. speaker_azimuth = . of( Double ( currentAngle ) )
127- spatialParams. speaker_distance = . of( currentDistance )
129+ spatialParams. speaker_azimuth = . of( spatialAngle )
130+ spatialParams. speaker_distance = . of( spatialDistance )
128131 spatialParams. speaker_elevation = . of( 0 )
129132 spatialParams. enable_blur = . of( false )
130133 spatialParams. enable_air_absorb = . of( true )
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