/**
* @author mrdoob / http://mrdoob.com/
*/
import { ArrayCamera } from '../../cameras/ArrayCamera.js';
import { EventDispatcher } from '../../core/EventDispatcher.js';
import { PerspectiveCamera } from '../../cameras/PerspectiveCamera.js';
import { Vector3 } from '../../math/Vector3.js';
import { Vector4 } from '../../math/Vector4.js';
import { WebGLAnimation } from '../webgl/WebGLAnimation.js';
import { WebXRController } from './WebXRController.js';
function WebXRManager( renderer, gl ) {
var scope = this;
var session = null;
var framebufferScaleFactor = 1.0;
var referenceSpace = null;
var referenceSpaceType = 'local-floor';
var pose = null;
var controllers = [];
var inputSourcesMap = new Map();
//
var cameraL = new PerspectiveCamera();
cameraL.layers.enable( 1 );
cameraL.viewport = new Vector4();
var cameraR = new PerspectiveCamera();
cameraR.layers.enable( 2 );
cameraR.viewport = new Vector4();
var cameras = [ cameraL, cameraR ];
var cameraVR = new ArrayCamera();
cameraVR.layers.enable( 1 );
cameraVR.layers.enable( 2 );
var _currentDepthNear = null;
var _currentDepthFar = null;
//
this.enabled = false;
this.isPresenting = false;
this.getController = function ( index ) {
var controller = controllers[ index ];
if ( controller === undefined ) {
controller = new WebXRController();
controllers[ index ] = controller;
}
return controller.getTargetRaySpace();
};
this.getControllerGrip = function ( index ) {
var controller = controllers[ index ];
if ( controller === undefined ) {
controller = new WebXRController();
controllers[ index ] = controller;
}
return controller.getGripSpace();
};
//
function onSessionEvent( event ) {
var controller = inputSourcesMap.get( event.inputSource );
if ( controller ) {
controller.dispatchEvent( { type: event.type } );
}
}
function onSessionEnd() {
inputSourcesMap.forEach( function ( controller, inputSource ) {
controller.disconnect( inputSource );
} );
inputSourcesMap.clear();
//
renderer.setFramebuffer( null );
renderer.setRenderTarget( renderer.getRenderTarget() ); // Hack #15830
animation.stop();
scope.isPresenting = false;
scope.dispatchEvent( { type: 'sessionend' } );
}
function onRequestReferenceSpace( value ) {
referenceSpace = value;
animation.setContext( session );
animation.start();
scope.isPresenting = true;
scope.dispatchEvent( { type: 'sessionstart' } );
}
this.setFramebufferScaleFactor = function ( value ) {
framebufferScaleFactor = value;
if ( scope.isPresenting === true ) {
console.warn( 'THREE.WebXRManager: Cannot change framebuffer scale while presenting.' );
}
};
this.setReferenceSpaceType = function ( value ) {
referenceSpaceType = value;
if ( scope.isPresenting === true ) {
console.warn( 'THREE.WebXRManager: Cannot change reference space type while presenting.' );
}
};
this.getReferenceSpace = function () {
return referenceSpace;
};
this.getSession = function () {
return session;
};
this.setSession = function ( value ) {
session = value;
if ( session !== null ) {
session.addEventListener( 'select', onSessionEvent );
session.addEventListener( 'selectstart', onSessionEvent );
session.addEventListener( 'selectend', onSessionEvent );
session.addEventListener( 'squeeze', onSessionEvent );
session.addEventListener( 'squeezestart', onSessionEvent );
session.addEventListener( 'squeezeend', onSessionEvent );
session.addEventListener( 'end', onSessionEnd );
var attributes = gl.getContextAttributes();
var layerInit = {
antialias: attributes.antialias,
alpha: attributes.alpha,
depth: attributes.depth,
stencil: attributes.stencil,
framebufferScaleFactor: framebufferScaleFactor
};
// eslint-disable-next-line no-undef
var baseLayer = new XRWebGLLayer( session, gl, layerInit );
session.updateRenderState( { baseLayer: baseLayer } );
session.requestReferenceSpace( referenceSpaceType ).then( onRequestReferenceSpace );
//
session.addEventListener( 'inputsourceschange', updateInputSources );
}
};
function updateInputSources( event ) {
var inputSources = session.inputSources;
// Assign inputSources to available controllers
for ( var i = 0; i < controllers.length; i ++ ) {
inputSourcesMap.set( inputSources[ i ], controllers[ i ] );
}
// Notify disconnected
for ( var i = 0; i < event.removed.length; i ++ ) {
var inputSource = event.removed[ i ];
var controller = inputSourcesMap.get( inputSource );
if ( controller ) {
controller.dispatchEvent( { type: 'disconnected', data: inputSource } );
inputSourcesMap.delete( inputSource );
}
}
// Notify connected
for ( var i = 0; i < event.added.length; i ++ ) {
var inputSource = event.added[ i ];
var controller = inputSourcesMap.get( inputSource );
if ( controller ) {
controller.dispatchEvent( { type: 'connected', data: inputSource } );
}
}
}
//
var cameraLPos = new Vector3();
var cameraRPos = new Vector3();
/**
* @author jsantell / https://www.jsantell.com/
*
* Assumes 2 cameras that are parallel and share an X-axis, and that
* the cameras' projection and world matrices have already been set.
* And that near and far planes are identical for both cameras.
* Visualization of this technique: https://computergraphics.stackexchange.com/a/4765
*/
function setProjectionFromUnion( camera, cameraL, cameraR ) {
cameraLPos.setFromMatrixPosition( cameraL.matrixWorld );
cameraRPos.setFromMatrixPosition( cameraR.matrixWorld );
var ipd = cameraLPos.distanceTo( cameraRPos );
var projL = cameraL.projectionMatrix.elements;
var projR = cameraR.projectionMatrix.elements;
// VR systems will have identical far and near planes, and
// most likely identical top and bottom frustum extents.
// Use the left camera for these values.
var near = projL[ 14 ] / ( projL[ 10 ] - 1 );
var far = projL[ 14 ] / ( projL[ 10 ] + 1 );
var topFov = ( projL[ 9 ] + 1 ) / projL[ 5 ];
var bottomFov = ( projL[ 9 ] - 1 ) / projL[ 5 ];
var leftFov = ( projL[ 8 ] - 1 ) / projL[ 0 ];
var rightFov = ( projR[ 8 ] + 1 ) / projR[ 0 ];
var left = near * leftFov;
var right = near * rightFov;
// Calculate the new camera's position offset from the
// left camera. xOffset should be roughly half `ipd`.
var zOffset = ipd / ( - leftFov + rightFov );
var xOffset = zOffset * - leftFov;
// TODO: Better way to apply this offset?
cameraL.matrixWorld.decompose( camera.position, camera.quaternion, camera.scale );
camera.translateX( xOffset );
camera.translateZ( zOffset );
camera.matrixWorld.compose( camera.position, camera.quaternion, camera.scale );
camera.matrixWorldInverse.getInverse( camera.matrixWorld );
// Find the union of the frustum values of the cameras and scale
// the values so that the near plane's position does not change in world space,
// although must now be relative to the new union camera.
var near2 = near + zOffset;
var far2 = far + zOffset;
var left2 = left - xOffset;
var right2 = right + ( ipd - xOffset );
var top2 = topFov * far / far2 * near2;
var bottom2 = bottomFov * far / far2 * near2;
camera.projectionMatrix.makePerspective( left2, right2, top2, bottom2, near2, far2 );
}
function updateCamera( camera, parent ) {
if ( parent === null ) {
camera.matrixWorld.copy( camera.matrix );
} else {
camera.matrixWorld.multiplyMatrices( parent.matrixWorld, camera.matrix );
}
camera.matrixWorldInverse.getInverse( camera.matrixWorld );
}
this.getCamera = function ( camera ) {
cameraVR.near = cameraR.near = cameraL.near = camera.near;
cameraVR.far = cameraR.far = cameraL.far = camera.far;
if ( _currentDepthNear !== cameraVR.near || _currentDepthFar !== cameraVR.far ) {
// Note that the new renderState won't apply until the next frame. See #18320
session.updateRenderState( {
depthNear: cameraVR.near,
depthFar: cameraVR.far
} );
_currentDepthNear = cameraVR.near;
_currentDepthFar = cameraVR.far;
}
var parent = camera.parent;
var cameras = cameraVR.cameras;
updateCamera( cameraVR, parent );
for ( var i = 0; i < cameras.length; i ++ ) {
updateCamera( cameras[ i ], parent );
}
// update camera and its children
camera.matrixWorld.copy( cameraVR.matrixWorld );
var children = camera.children;
for ( var i = 0, l = children.length; i < l; i ++ ) {
children[ i ].updateMatrixWorld( true );
}
// update projection matrix for proper view frustum culling
if ( cameras.length === 2 ) {
setProjectionFromUnion( cameraVR, cameraL, cameraR );
} else {
// assume single camera setup (AR)
cameraVR.projectionMatrix.copy( cameraL.projectionMatrix );
}
return cameraVR;
};
// Animation Loop
var onAnimationFrameCallback = null;
function onAnimationFrame( time, frame ) {
pose = frame.getViewerPose( referenceSpace );
if ( pose !== null ) {
var views = pose.views;
var baseLayer = session.renderState.baseLayer;
renderer.setFramebuffer( baseLayer.framebuffer );
var cameraVRNeedsUpdate = false;
// check if it's necessary to rebuild cameraVR's camera list
if ( views.length !== cameraVR.cameras.length ) {
cameraVR.cameras.length = 0;
cameraVRNeedsUpdate = true;
}
for ( var i = 0; i < views.length; i ++ ) {
var view = views[ i ];
var viewport = baseLayer.getViewport( view );
var camera = cameras[ i ];
camera.matrix.fromArray( view.transform.matrix );
camera.projectionMatrix.fromArray( view.projectionMatrix );
camera.viewport.set( viewport.x, viewport.y, viewport.width, viewport.height );
if ( i === 0 ) {
cameraVR.matrix.copy( camera.matrix );
}
if ( cameraVRNeedsUpdate === true ) {
cameraVR.cameras.push( camera );
}
}
}
//
var inputSources = session.inputSources;
for ( var i = 0; i < controllers.length; i ++ ) {
var controller = controllers[ i ];
var inputSource = inputSources[ i ];
controller.update( inputSource, frame, referenceSpace );
}
if ( onAnimationFrameCallback ) onAnimationFrameCallback( time, frame );
}
var animation = new WebGLAnimation();
animation.setAnimationLoop( onAnimationFrame );
this.setAnimationLoop = function ( callback ) {
onAnimationFrameCallback = callback;
};
this.dispose = function () {};
}
Object.assign( WebXRManager.prototype, EventDispatcher.prototype );
export { WebXRManager };