带有deviceorientation的Google街景视图(Full Tilt)

时间:2016-05-04 11:20:53

标签: google-maps google-street-view device-orientation

我正在尝试创建一个可以通过设备方向进行控制的Google街景。

我正在使用Full Tilt来规范设备/操作系统,它似乎做得非常好。事实上,我之后的解决方案似乎非常接近。

然而,在不同的位置,视图似乎快速跳跃(虽然它似乎解决了正确的位置)并且不像我想的那样顺利。如果将设备保持在大约90度(直立)并稍微向左或向右旋转,这似乎特别明显。

JS Fiddle有一个示例,需要在移动设备或平板电脑上查看效果。进一步向下链接只有在你可以进入允许设备方向工作的编辑模式时才有效。

有任何想法,如果有办法解决这个问题?或者如果我在这里遇到失败者?



var map;

google.maps.event.addDomListener(window, "load", function () {
	
  // Set up map
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 9,
    // Initial
    center:{
      lat: 35.6735408,
      lng: 139.570305,
    },
    disableDefaultUI: true,
    streetViewControl: true,
  });
  
  // Set up street view
  google.maps.streetViewViewer = 'photosphere';
  var street_view = new google.maps.StreetViewPanorama(document.getElementById('street-view'), {
    addressControl: false,
    fullscreenControl: false,
    zoomControl: false,
  });
  street_view.setPano('2qVB_HA94-kQCAzwffO44g');
  
  // When street view ready, update map position and pov
  street_view.addListener('status_changed', function(){
    var position = street_view.getPosition();
    if( map ){
      map.setCenter(position);
      map.setStreetView(street_view);
    }
  });
  
  // FULL TILT ORIENTATION
  var promise = new FULLTILT.getDeviceOrientation({ 'type': 'world' });

  var deviceOrientation;

  promise
  .then(function(controller) {
    deviceOrientation = controller;
  })
  .catch(function(message) {
    console.error(message);
  });

  (function draw() {

    if (deviceOrientation) {

      var euler = deviceOrientation.getScreenAdjustedEuler();

			//  debug
			console.log('alpha: %d, beta: %d, gamma: %d', euler.alpha, euler.beta, euler.gamma);
      document.getElementById('alpha').innerHTML = euler.alpha.toFixed(2);
      document.getElementById('beta').innerHTML = euler.beta.toFixed(2);
      document.getElementById('gamma').innerHTML = euler.gamma.toFixed(2);
      
      // Set POV
      if( euler.alpha != 0 && euler.beta != 0 && euler.gamma !=0 ){
      	street_view.setPov({
          heading: euler.alpha*-1,
          pitch: euler.beta-90,
        });
      }
    }
    requestAnimationFrame(draw);
  })();

});

/*! Full Tilt v0.5.2 / http://github.com/richtr/Full-Tilt */
!function(a){function b(a){return a=+a,0===a||isNaN(a)?a:a>0?1:-1}function c(a){var b=new Promise(function(b,c){var d=function(e){setTimeout(function(){a&&a.data?b():e>=20?c():d(++e)},50)};d(0)});return b}function d(){o=n?(a.screen.orientation.angle||0)*j:(a.orientation||0)*j}function e(a){l.orientation.data=a;for(var b in l.orientation.callbacks)l.orientation.callbacks[b].call(this)}function f(a){l.motion.data=a;for(var b in l.motion.callbacks)l.motion.callbacks[b].call(this)}if(void 0===a.FULLTILT||null===a.FULLTILT){var g=Math.PI,h=g/2,i=2*g,j=g/180,k=180/g,l={orientation:{active:!1,callbacks:[],data:void 0},motion:{active:!1,callbacks:[],data:void 0}},m=!1,n=a.screen&&a.screen.orientation&&void 0!==a.screen.orientation.angle&&null!==a.screen.orientation.angle?!0:!1,o=(n?a.screen.orientation.angle:a.orientation||0)*j,p=h,q=g,r=i/3,s=-h,t={};t.version="0.5.2",t.getDeviceOrientation=function(a){var b=new Promise(function(b,d){var e=new t.DeviceOrientation(a);e.start();var f=new c(l.orientation);f.then(function(){e._alphaAvailable=l.orientation.data.alpha&&null!==l.orientation.data.alpha,e._betaAvailable=l.orientation.data.beta&&null!==l.orientation.data.beta,e._gammaAvailable=l.orientation.data.gamma&&null!==l.orientation.data.gamma,b(e)}).catch(function(){e.stop(),d("DeviceOrientation is not supported")})});return b},t.getDeviceMotion=function(a){var b=new Promise(function(b,d){var e=new t.DeviceMotion(a);e.start();var f=new c(l.motion);f.then(function(){e._accelerationXAvailable=l.motion.data.acceleration&&l.motion.data.acceleration.x,e._accelerationYAvailable=l.motion.data.acceleration&&l.motion.data.acceleration.y,e._accelerationZAvailable=l.motion.data.acceleration&&l.motion.data.acceleration.z,e._accelerationIncludingGravityXAvailable=l.motion.data.accelerationIncludingGravity&&l.motion.data.accelerationIncludingGravity.x,e._accelerationIncludingGravityYAvailable=l.motion.data.accelerationIncludingGravity&&l.motion.data.accelerationIncludingGravity.y,e._accelerationIncludingGravityZAvailable=l.motion.data.accelerationIncludingGravity&&l.motion.data.accelerationIncludingGravity.z,e._rotationRateAlphaAvailable=l.motion.data.rotationRate&&l.motion.data.rotationRate.alpha,e._rotationRateBetaAvailable=l.motion.data.rotationRate&&l.motion.data.rotationRate.beta,e._rotationRateGammaAvailable=l.motion.data.rotationRate&&l.motion.data.rotationRate.gamma,b(e)}).catch(function(){e.stop(),d("DeviceMotion is not supported")})});return b},t.Quaternion=function(a,c,d,e){var f;this.set=function(a,b,c,d){this.x=a||0,this.y=b||0,this.z=c||0,this.w=d||1},this.copy=function(a){this.x=a.x,this.y=a.y,this.z=a.z,this.w=a.w},this.setFromEuler=function(){var a,b,c,d,e,f,g,h,i,k,l,m;return function(n){return n=n||{},c=(n.alpha||0)*j,a=(n.beta||0)*j,b=(n.gamma||0)*j,f=c/2,d=a/2,e=b/2,g=Math.cos(d),h=Math.cos(e),i=Math.cos(f),k=Math.sin(d),l=Math.sin(e),m=Math.sin(f),this.set(k*h*i-g*l*m,g*l*i+k*h*m,g*h*m+k*l*i,g*h*i-k*l*m),this.normalize(),this}}(),this.setFromRotationMatrix=function(){var a;return function(c){return a=c.elements,this.set(.5*Math.sqrt(1+a[0]-a[4]-a[8])*b(a[7]-a[5]),.5*Math.sqrt(1-a[0]+a[4]-a[8])*b(a[2]-a[6]),.5*Math.sqrt(1-a[0]-a[4]+a[8])*b(a[3]-a[1]),.5*Math.sqrt(1+a[0]+a[4]+a[8])),this}}(),this.multiply=function(a){return f=t.Quaternion.prototype.multiplyQuaternions(this,a),this.copy(f),this},this.rotateX=function(a){return f=t.Quaternion.prototype.rotateByAxisAngle(this,[1,0,0],a),this.copy(f),this},this.rotateY=function(a){return f=t.Quaternion.prototype.rotateByAxisAngle(this,[0,1,0],a),this.copy(f),this},this.rotateZ=function(a){return f=t.Quaternion.prototype.rotateByAxisAngle(this,[0,0,1],a),this.copy(f),this},this.normalize=function(){return t.Quaternion.prototype.normalize(this)},this.set(a,c,d,e)},t.Quaternion.prototype={constructor:t.Quaternion,multiplyQuaternions:function(){var a=new t.Quaternion;return function(b,c){var d=b.x,e=b.y,f=b.z,g=b.w,h=c.x,i=c.y,j=c.z,k=c.w;return a.set(d*k+g*h+e*j-f*i,e*k+g*i+f*h-d*j,f*k+g*j+d*i-e*h,g*k-d*h-e*i-f*j),a}}(),normalize:function(a){var b=Math.sqrt(a.x*a.x+a.y*a.y+a.z*a.z+a.w*a.w);return 0===b?(a.x=0,a.y=0,a.z=0,a.w=1):(b=1/b,a.x*=b,a.y*=b,a.z*=b,a.w*=b),a},rotateByAxisAngle:function(){var a,b,c=new t.Quaternion,d=new t.Quaternion;return function(e,f,g){return a=(g||0)/2,b=Math.sin(a),d.set((f[0]||0)*b,(f[1]||0)*b,(f[2]||0)*b,Math.cos(a)),c=t.Quaternion.prototype.multiplyQuaternions(e,d),t.Quaternion.prototype.normalize(c)}}()},t.RotationMatrix=function(a,b,c,d,e,f,g,h,i){var k;this.elements=new Float32Array(9),this.identity=function(){return this.set(1,0,0,0,1,0,0,0,1),this},this.set=function(a,b,c,d,e,f,g,h,i){this.elements[0]=a||1,this.elements[1]=b||0,this.elements[2]=c||0,this.elements[3]=d||0,this.elements[4]=e||1,this.elements[5]=f||0,this.elements[6]=g||0,this.elements[7]=h||0,this.elements[8]=i||1},this.copy=function(a){this.elements[0]=a.elements[0],this.elements[1]=a.elements[1],this.elements[2]=a.elements[2],this.elements[3]=a.elements[3],this.elements[4]=a.elements[4],this.elements[5]=a.elements[5],this.elements[6]=a.elements[6],this.elements[7]=a.elements[7],this.elements[8]=a.elements[8]},this.setFromEuler=function(){var a,b,c,d,e,f,g,h,i;return function(k){return k=k||{},c=(k.alpha||0)*j,a=(k.beta||0)*j,b=(k.gamma||0)*j,d=Math.cos(a),e=Math.cos(b),f=Math.cos(c),g=Math.sin(a),h=Math.sin(b),i=Math.sin(c),this.set(f*e-i*g*h,-d*i,e*i*g+f*h,e*i+f*g*h,f*d,i*h-f*e*g,-d*h,g,d*e),this.normalize(),this}}(),this.setFromQuaternion=function(){var a,b,c,d;return function(e){return a=e.w*e.w,b=e.x*e.x,c=e.y*e.y,d=e.z*e.z,this.set(a+b-c-d,2*(e.x*e.y-e.w*e.z),2*(e.x*e.z+e.w*e.y),2*(e.x*e.y+e.w*e.z),a-b+c-d,2*(e.y*e.z-e.w*e.x),2*(e.x*e.z-e.w*e.y),2*(e.y*e.z+e.w*e.x),a-b-c+d),this}}(),this.multiply=function(a){return k=t.RotationMatrix.prototype.multiplyMatrices(this,a),this.copy(k),this},this.rotateX=function(a){return k=t.RotationMatrix.prototype.rotateByAxisAngle(this,[1,0,0],a),this.copy(k),this},this.rotateY=function(a){return k=t.RotationMatrix.prototype.rotateByAxisAngle(this,[0,1,0],a),this.copy(k),this},this.rotateZ=function(a){return k=t.RotationMatrix.prototype.rotateByAxisAngle(this,[0,0,1],a),this.copy(k),this},this.normalize=function(){return t.RotationMatrix.prototype.normalize(this)},this.set(a,b,c,d,e,f,g,h,i)},t.RotationMatrix.prototype={constructor:t.RotationMatrix,multiplyMatrices:function(){var a,b,c=new t.RotationMatrix;return function(d,e){return a=d.elements,b=e.elements,c.set(a[0]*b[0]+a[1]*b[3]+a[2]*b[6],a[0]*b[1]+a[1]*b[4]+a[2]*b[7],a[0]*b[2]+a[1]*b[5]+a[2]*b[8],a[3]*b[0]+a[4]*b[3]+a[5]*b[6],a[3]*b[1]+a[4]*b[4]+a[5]*b[7],a[3]*b[2]+a[4]*b[5]+a[5]*b[8],a[6]*b[0]+a[7]*b[3]+a[8]*b[6],a[6]*b[1]+a[7]*b[4]+a[8]*b[7],a[6]*b[2]+a[7]*b[5]+a[8]*b[8]),c}}(),normalize:function(a){var b=a.elements,c=b[0]*b[4]*b[8]-b[0]*b[5]*b[7]-b[1]*b[3]*b[8]+b[1]*b[5]*b[6]+b[2]*b[3]*b[7]-b[2]*b[4]*b[6];return b[0]/=c,b[1]/=c,b[2]/=c,b[3]/=c,b[4]/=c,b[5]/=c,b[6]/=c,b[7]/=c,b[8]/=c,a.elements=b,a},rotateByAxisAngle:function(){var a,b,c=new t.RotationMatrix,d=new t.RotationMatrix,e=!1;return function(f,g,h){return d.identity(),e=!1,a=Math.sin(h),b=Math.cos(h),1===g[0]&&0===g[1]&&0===g[2]?(e=!0,d.elements[4]=b,d.elements[5]=-a,d.elements[7]=a,d.elements[8]=b):1===g[1]&&0===g[0]&&0===g[2]?(e=!0,d.elements[0]=b,d.elements[2]=a,d.elements[6]=-a,d.elements[8]=b):1===g[2]&&0===g[0]&&0===g[1]&&(e=!0,d.elements[0]=b,d.elements[1]=-a,d.elements[3]=a,d.elements[4]=b),e?(c=t.RotationMatrix.prototype.multiplyMatrices(f,d),c=t.RotationMatrix.prototype.normalize(c)):c=f,c}}()},t.Euler=function(a,b,c){this.set=function(a,b,c){this.alpha=a||0,this.beta=b||0,this.gamma=c||0},this.copy=function(a){this.alpha=a.alpha,this.beta=a.beta,this.gamma=a.gamma},this.setFromRotationMatrix=function(){var a,b,c,d;return function(e){a=e.elements,a[8]>0?(b=Math.atan2(-a[1],a[4]),c=Math.asin(a[7]),d=Math.atan2(-a[6],a[8])):a[8]<0?(b=Math.atan2(a[1],-a[4]),c=-Math.asin(a[7]),c+=c>=0?-g:g,d=Math.atan2(a[6],-a[8])):a[6]>0?(b=Math.atan2(-a[1],a[4]),c=Math.asin(a[7]),d=-h):a[6]<0?(b=Math.atan2(a[1],-a[4]),c=-Math.asin(a[7]),c+=c>=0?-g:g,d=-h):(b=Math.atan2(a[3],a[0]),c=a[7]>0?h:-h,d=0),0>b&&(b+=i),b*=k,c*=k,d*=k,this.set(b,c,d)}}(),this.setFromQuaternion=function(){var a,b,c;return function(d){var e=d.w*d.w,f=d.x*d.x,j=d.y*d.y,l=d.z*d.z,m=e+f+j+l,n=d.w*d.x+d.y*d.z,o=1e-6;if(n>(.5-o)*m)a=2*Math.atan2(d.y,d.w),b=h,c=0;else if((-.5+o)*m>n)a=-2*Math.atan2(d.y,d.w),b=-h,c=0;else{var p=e-f+j-l,q=2*(d.w*d.z-d.x*d.y),r=e-f-j+l,s=2*(d.w*d.y-d.x*d.z);r>0?(a=Math.atan2(q,p),b=Math.asin(2*n/m),c=Math.atan2(s,r)):(a=Math.atan2(-q,-p),b=-Math.asin(2*n/m),b+=0>b?g:-g,c=Math.atan2(-s,-r))}0>a&&(a+=i),a*=k,b*=k,c*=k,this.set(a,b,c)}}(),this.rotateX=function(a){return t.Euler.prototype.rotateByAxisAngle(this,[1,0,0],a),this},this.rotateY=function(a){return t.Euler.prototype.rotateByAxisAngle(this,[0,1,0],a),this},this.rotateZ=function(a){return t.Euler.prototype.rotateByAxisAngle(this,[0,0,1],a),this},this.set(a,b,c)},t.Euler.prototype={constructor:t.Euler,rotateByAxisAngle:function(){var a=new t.RotationMatrix;return function(b,c,d){return a.setFromEuler(b),a=t.RotationMatrix.prototype.rotateByAxisAngle(a,c,d),b.setFromRotationMatrix(a),b}}()},t.DeviceOrientation=function(b){this.options=b||{};var c=0,d=200,e=0,f=10;if(this.alphaOffsetScreen=0,this.alphaOffsetDevice=void 0,"game"===this.options.type){var g=function(b){return null!==b.alpha&&(this.alphaOffsetDevice=new t.Euler(b.alpha,0,0),this.alphaOffsetDevice.rotateZ(-o),++e>=f)?void a.removeEventListener("deviceorientation",g,!1):void(++c>=d&&a.removeEventListener("deviceorientation",g,!1))}.bind(this);a.addEventListener("deviceorientation",g,!1)}else if("world"===this.options.type){var h=function(b){return b.absolute!==!0&&void 0!==b.webkitCompassAccuracy&&null!==b.webkitCompassAccuracy&&+b.webkitCompassAccuracy>=0&&+b.webkitCompassAccuracy<50&&(this.alphaOffsetDevice=new t.Euler(b.webkitCompassHeading,0,0),this.alphaOffsetDevice.rotateZ(o),this.alphaOffsetScreen=o,++e>=f)?void a.removeEventListener("deviceorientation",h,!1):void(++c>=d&&a.removeEventListener("deviceorientation",h,!1))}.bind(this);a.addEventListener("deviceorientation",h,!1)}},t.DeviceOrientation.prototype={constructor:t.DeviceOrientation,start:function(b){b&&"[object Function]"==Object.prototype.toString.call(b)&&l.orientation.callbacks.push(b),m||(n?a.screen.orientation.addEventListener("change",d,!1):a.addEventListener("orientationchange",d,!1)),l.orientation.active||(a.addEventListener("deviceorientation",e,!1),l.orientation.active=!0)},stop:function(){l.orientation.active&&(a.removeEventListener("deviceorientation",e,!1),l.orientation.active=!1)},listen:function(a){this.start(a)},getFixedFrameQuaternion:function(){var a=new t.Euler,b=new t.RotationMatrix,c=new t.Quaternion;return function(){var d=l.orientation.data||{alpha:0,beta:0,gamma:0},e=d.alpha;return this.alphaOffsetDevice&&(b.setFromEuler(this.alphaOffsetDevice),b.rotateZ(-this.alphaOffsetScreen),a.setFromRotationMatrix(b),a.alpha<0&&(a.alpha+=360),e-=a.alpha),a.set(e,d.beta,d.gamma),c.setFromEuler(a),c}}(),getScreenAdjustedQuaternion:function(){var a;return function(){return a=this.getFixedFrameQuaternion(),a.rotateZ(-o),a}}(),getFixedFrameMatrix:function(){var a=new t.Euler,b=new t.RotationMatrix;return function(){var c=l.orientation.data||{alpha:0,beta:0,gamma:0},d=c.alpha;return this.alphaOffsetDevice&&(b.setFromEuler(this.alphaOffsetDevice),b.rotateZ(-this.alphaOffsetScreen),a.setFromRotationMatrix(b),a.alpha<0&&(a.alpha+=360),d-=a.alpha),a.set(d,c.beta,c.gamma),b.setFromEuler(a),b}}(),getScreenAdjustedMatrix:function(){var a;return function(){return a=this.getFixedFrameMatrix(),a.rotateZ(-o),a}}(),getFixedFrameEuler:function(){var a,b=new t.Euler;return function(){return a=this.getFixedFrameMatrix(),b.setFromRotationMatrix(a),b}}(),getScreenAdjustedEuler:function(){var a,b=new t.Euler;return function(){return a=this.getScreenAdjustedMatrix(),b.setFromRotationMatrix(a),b}}(),isAbsolute:function(){return l.orientation.data&&l.orientation.data.absolute===!0?!0:!1},getLastRawEventData:function(){return l.orientation.data||{}},_alphaAvailable:!1,_betaAvailable:!1,_gammaAvailable:!1,isAvailable:function(a){switch(a){case this.ALPHA:return this._alphaAvailable;case this.BETA:return this._betaAvailable;case this.GAMMA:return this._gammaAvailable}},ALPHA:"alpha",BETA:"beta",GAMMA:"gamma"},t.DeviceMotion=function(a){this.options=a||{}},t.DeviceMotion.prototype={constructor:t.DeviceMotion,start:function(b){b&&"[object Function]"==Object.prototype.toString.call(b)&&l.motion.callbacks.push(b),m||(n?a.screen.orientation.addEventListener("change",d,!1):a.addEventListener("orientationchange",d,!1)),l.motion.active||(a.addEventListener("devicemotion",f,!1),l.motion.active=!0)},stop:function(){l.motion.active&&(a.removeEventListener("devicemotion",f,!1),l.motion.active=!1)},listen:function(a){this.start(a)},getScreenAdjustedAcceleration:function(){var a=l.motion.data&&l.motion.data.acceleration?l.motion.data.acceleration:{x:0,y:0,z:0},b={};switch(o){case p:b.x=-a.y,b.y=a.x;break;case q:b.x=-a.x,b.y=-a.y;break;case r:case s:b.x=a.y,b.y=-a.x;break;default:b.x=a.x,b.y=a.y}return b.z=a.z,b},getScreenAdjustedAccelerationIncludingGravity:function(){var a=l.motion.data&&l.motion.data.accelerationIncludingGravity?l.motion.data.accelerationIncludingGravity:{x:0,y:0,z:0},b={};switch(o){case p:b.x=-a.y,b.y=a.x;break;case q:b.x=-a.x,b.y=-a.y;break;case r:case s:b.x=a.y,b.y=-a.x;break;default:b.x=a.x,b.y=a.y}return b.z=a.z,b},getScreenAdjustedRotationRate:function(){var a=l.motion.data&&l.motion.data.rotationRate?l.motion.data.rotationRate:{alpha:0,beta:0,gamma:0},b={};switch(o){case p:b.beta=-a.gamma,b.gamma=a.beta;break;case q:b.beta=-a.beta,b.gamma=-a.gamma;break;case r:case s:b.beta=a.gamma,b.gamma=-a.beta;break;default:b.beta=a.beta,b.gamma=a.gamma}return b.alpha=a.alpha,b},getLastRawEventData:function(){return l.motion.data||{}},_accelerationXAvailable:!1,_accelerationYAvailable:!1,_accelerationZAvailable:!1,_accelerationIncludingGravityXAvailable:!1,_accelerationIncludingGravityYAvailable:!1,_accelerationIncludingGravityZAvailable:!1,_rotationRateAlphaAvailable:!1,_rotationRateBetaAvailable:!1,_rotationRateGammaAvailable:!1,isAvailable:function(a){switch(a){case this.ACCELERATION_X:return this._accelerationXAvailable;case this.ACCELERATION_Y:return this._accelerationYAvailable;case this.ACCELERATION_Z:return this._accelerationZAvailable;case this.ACCELERATION_INCLUDING_GRAVITY_X:return this._accelerationIncludingGravityXAvailable;case this.ACCELERATION_INCLUDING_GRAVITY_Y:return this._accelerationIncludingGravityYAvailable;case this.ACCELERATION_INCLUDING_GRAVITY_Z:return this._accelerationIncludingGravityZAvailable;case this.ROTATION_RATE_ALPHA:return this._rotationRateAlphaAvailable;case this.ROTATION_RATE_BETA:return this._rotationRateBetaAvailable;case this.ROTATION_RATE_GAMMA:return this._rotationRateGammaAvailable}},ACCELERATION_X:"accelerationX",ACCELERATION_Y:"accelerationY",ACCELERATION_Z:"accelerationZ",ACCELERATION_INCLUDING_GRAVITY_X:"accelerationIncludingGravityX",ACCELERATION_INCLUDING_GRAVITY_Y:"accelerationIncludingGravityY",ACCELERATION_INCLUDING_GRAVITY_Z:"accelerationIncludingGravityZ",ROTATION_RATE_ALPHA:"rotationRateAlpha",ROTATION_RATE_BETA:"rotationRateBeta",ROTATION_RATE_GAMMA:"rotationRateGamma"},a.FULLTILT=t}}(window);
&#13;
#map{
  width: 200px; height: 200px; position: absolute; right: 20px; bottom: 20px;
}
#street-view{
  width: 100%; height: 100%; position: absolute; top: 0; left: 0;
}
#debug{
  position: absolute; top: 0; left: 0; padding: 10px; border: 1px solid white; color: white;
}
&#13;
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js"></script>
<div id="street-view"></div>
<div id="map"></div>
<div id="debug">
  alpha: <span id="alpha"></span> | 
  beta: <span id="beta"></span> | 
  gamma: <span id="gamma"></span>
</div>
&#13;
&#13;
&#13;

0 个答案:

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