@@ -43,7 +43,8 @@ class SpatialAudioMain: BaseViewController {
4343 }
4444
4545 func setupUI( ) {
46- infoLabel. text = " 请插入耳机体验空间音效效果 " . localized
46+ infoLabel. text = " Please insert headphones to experience the spatial audio effect " . localized
47+ startButton. setTitle ( " Start " . localized, for: . normal)
4748
4849 let panGesture = UIPanGestureRecognizer ( target: self , action: #selector( panGestureChanged) )
4950 self . soundSourceView. addGestureRecognizer ( panGesture)
@@ -66,10 +67,12 @@ class SpatialAudioMain: BaseViewController {
6667 self . peopleView. isHidden = false
6768 self . soundSourceView. isHidden = false
6869 } else {
69- self . infoLabel. text = " 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 "
70+ 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
71+ self . infoLabel. text = " \( text) ( \( self . downCount - timeout) ) "
7072 }
7173 } else {
72- self . infoLabel. text = " 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
74+ let text = " Now you can move the speaker icon to experience the spatial audio effect " . localized
75+ self . infoLabel. text = " \( text) ( \( self . downCount) ) "
7376 if self . downCount == 0 {
7477 self . agoraKit. stopEchoTest ( )
7578 self . agoraKit. enableSpatialAudio ( false )
@@ -78,55 +81,54 @@ class SpatialAudioMain: BaseViewController {
7881 self . peopleView. isHidden = true
7982 self . soundSourceView. isHidden = true
8083 self . startButton. isHidden = false
81- self . infoLabel. text = " 请插入耳机体验空间音效效果 " . localized
84+ self . infoLabel. text = " Please insert headphones to experience the spatial audio effect " . localized
8285 }
8386 }
8487 }
8588 }
8689
8790 @objc func panGestureChanged( gesture: UIPanGestureRecognizer ) {
88- let circleCenter = self . peopleView. center
8991 let move = gesture. translation ( in: self . view)
90- var newCenter = gesture. view!. center
91- newCenter = CGPoint ( x: newCenter. x + move. x, y: newCenter. y + move. y)
92-
93- let deltaX = newCenter. x - circleCenter. x
94- let deltaY = circleCenter. y - newCenter. y
95- if deltaX == 0 { return }
96-
97- // In spatial audio, angle is range [0, 360], it is angle 0 when at Y direction.
98- let tanValue = abs ( deltaY) / abs( deltaX)
99- let tanAngle = atan ( tanValue) * 180.0 / Double. pi
100- var spatialAngle = 0.0
101- if deltaX > 0 && deltaY > 0 { // scope I
102- spatialAngle = 270.0 + tanAngle
103- } else if deltaX < 0 && deltaY > 0 { // scope II
104- spatialAngle = 90.0 - tanAngle
105- } else if deltaX < 0 && deltaY < 0 { // scope III
106- spatialAngle = 90.0 + tanAngle
107- } else if deltaX > 0 && deltaY < 0 { // scope IV
108- spatialAngle = 270.0 - tanAngle
92+ var objectCenter = gesture. view!. center
93+ objectCenter = CGPoint ( x: objectCenter. x + move. x, y: objectCenter. y + move. y)
94+ soundSourceView. center = objectCenter
95+ gesture. setTranslation ( . zero, in: self . view)
96+
97+ if gesture. state == . ended {
98+ updatePosition ( objectCenter: objectCenter)
10999 }
100+ }
101+
102+ func updatePosition( objectCenter: CGPoint ) {
103+ let circleCenter = self . peopleView. center
104+ let deltaX = objectCenter. x - circleCenter. x
105+ let deltaY = circleCenter. y - objectCenter. y
106+ let R = sqrt ( deltaX * deltaX + deltaY * deltaY)
110107
111- if gesture. state == . ended {
112- let L = sqrt ( deltaX * deltaX + deltaY * deltaY)
113- let maxL = UIScreen . main. bounds. height / 2.0
114- let maxSpatailDistance = 30.0
115- let spatialDistance = L * maxSpatailDistance / maxL
116- currentAngle = spatialAngle
117- currentDistance = spatialDistance
118-
119- self . updateRemoteUserSpatialAudioPositon ( )
108+ // In spatial audio, angle is range [0, 360], it is angle 0 when at Y direction with anti-clockwise
109+ let TwoPI = Double . pi * 2.0
110+ let cosAngle = acos ( deltaX / R)
111+ let mathAngle = deltaY > 0 ? cosAngle : ( TwoPI - cosAngle)
112+ var spatialAngle = mathAngle - TwoPI / 4.0
113+ if spatialAngle < 0 {
114+ spatialAngle = TwoPI + spatialAngle
120115 }
121116
122- self . soundSourceView. center = newCenter
123- gesture. setTranslation ( . zero, in: self . view)
117+ currentAngle = spatialAngle
118+ currentDistance = R
119+ self . updateRemoteUserSpatialAudioPositon ( )
120+ print ( " \( mathAngle) , \( spatialAngle) , \( deltaX) , \( deltaY) " )
124121 }
125122
126123 func updateRemoteUserSpatialAudioPositon( ) {
124+ let maxR = UIScreen . main. bounds. height / 2.0
125+ let maxSpatailDistance = 30.0
126+ let spatialDistance = currentDistance * maxSpatailDistance / maxR
127+ let spatialAngle = currentAngle * 180.0 / Double. pi
128+
127129 let spatialParams = AgoraSpatialAudioParams ( )
128- spatialParams. speaker_azimuth = . of( Double ( currentAngle ) )
129- spatialParams. speaker_distance = . of( currentDistance )
130+ spatialParams. speaker_azimuth = . of( spatialAngle )
131+ spatialParams. speaker_distance = . of( spatialDistance )
130132 spatialParams. speaker_elevation = . of( 0 )
131133 spatialParams. enable_blur = . of( false )
132134 spatialParams. enable_air_absorb = . of( true )
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