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KAOKA Daisuke
/**
* @author dmarcos / https://github.com/dmarcos
* @author mrdoob / http://mrdoob.com
*
* WebVR Spec: http://mozvr.github.io/webvr-spec/webvr.html
*
* Firefox: http://mozvr.com/downloads/
* Chromium: https://webvr.info/get-chrome
*/
THREE.VREffect = function ( renderer, onError ) {
var vrDisplay, vrDisplays;
var eyeTranslationL = new THREE.Vector3();
var eyeTranslationR = new THREE.Vector3();
var renderRectL, renderRectR;
var headMatrix = new THREE.Matrix4();
var eyeMatrixL = new THREE.Matrix4();
var eyeMatrixR = new THREE.Matrix4();
var frameData = null;
if ( 'VRFrameData' in window ) {
frameData = new window.VRFrameData();
}
function gotVRDisplays( displays ) {
vrDisplays = displays;
if ( displays.length > 0 ) {
vrDisplay = displays[ 0 ];
} else {
if ( onError ) onError( 'HMD not available' );
}
}
if ( navigator.getVRDisplays ) {
navigator.getVRDisplays().then( gotVRDisplays ).catch( function () {
console.warn( 'THREE.VREffect: Unable to get VR Displays' );
} );
}
//
this.isPresenting = false;
var scope = this;
var rendererSize = renderer.getSize();
var rendererUpdateStyle = false;
var rendererPixelRatio = renderer.getPixelRatio();
this.getVRDisplay = function () {
return vrDisplay;
};
this.setVRDisplay = function ( value ) {
vrDisplay = value;
};
this.getVRDisplays = function () {
console.warn( 'THREE.VREffect: getVRDisplays() is being deprecated.' );
return vrDisplays;
};
this.setSize = function ( width, height, updateStyle ) {
rendererSize = { width: width, height: height };
rendererUpdateStyle = updateStyle;
if ( scope.isPresenting ) {
var eyeParamsL = vrDisplay.getEyeParameters( 'left' );
renderer.setPixelRatio( 1 );
renderer.setSize( eyeParamsL.renderWidth * 2, eyeParamsL.renderHeight, false );
} else {
renderer.setPixelRatio( rendererPixelRatio );
renderer.setSize( width, height, updateStyle );
}
};
// VR presentation
var canvas = renderer.domElement;
var defaultLeftBounds = [ 0.0, 0.0, 0.5, 1.0 ];
var defaultRightBounds = [ 0.5, 0.0, 0.5, 1.0 ];
function onVRDisplayPresentChange() {
var wasPresenting = scope.isPresenting;
scope.isPresenting = vrDisplay !== undefined && vrDisplay.isPresenting;
if ( scope.isPresenting ) {
var eyeParamsL = vrDisplay.getEyeParameters( 'left' );
var eyeWidth = eyeParamsL.renderWidth;
var eyeHeight = eyeParamsL.renderHeight;
if ( ! wasPresenting ) {
rendererPixelRatio = renderer.getPixelRatio();
rendererSize = renderer.getSize();
renderer.setPixelRatio( 1 );
renderer.setSize( eyeWidth * 2, eyeHeight, false );
}
} else if ( wasPresenting ) {
renderer.setPixelRatio( rendererPixelRatio );
renderer.setSize( rendererSize.width, rendererSize.height, rendererUpdateStyle );
}
}
window.addEventListener( 'vrdisplaypresentchange', onVRDisplayPresentChange, false );
this.setFullScreen = function ( boolean ) {
return new Promise( function ( resolve, reject ) {
if ( vrDisplay === undefined ) {
reject( new Error( 'No VR hardware found.' ) );
return;
}
if ( scope.isPresenting === boolean ) {
resolve();
return;
}
if ( boolean ) {
resolve( vrDisplay.requestPresent( [ { source: canvas } ] ) );
} else {
resolve( vrDisplay.exitPresent() );
}
} );
};
this.requestPresent = function () {
return this.setFullScreen( true );
};
this.exitPresent = function () {
return this.setFullScreen( false );
};
this.requestAnimationFrame = function ( f ) {
if ( vrDisplay !== undefined ) {
return vrDisplay.requestAnimationFrame( f );
} else {
return window.requestAnimationFrame( f );
}
};
this.cancelAnimationFrame = function ( h ) {
if ( vrDisplay !== undefined ) {
vrDisplay.cancelAnimationFrame( h );
} else {
window.cancelAnimationFrame( h );
}
};
this.submitFrame = function () {
if ( vrDisplay !== undefined && scope.isPresenting ) {
vrDisplay.submitFrame();
}
};
this.autoSubmitFrame = true;
// render
var cameraL = new THREE.PerspectiveCamera();
cameraL.layers.enable( 1 );
var cameraR = new THREE.PerspectiveCamera();
cameraR.layers.enable( 2 );
this.render = function ( scene, camera, renderTarget, forceClear ) {
if ( vrDisplay && scope.isPresenting ) {
var autoUpdate = scene.autoUpdate;
if ( autoUpdate ) {
scene.updateMatrixWorld();
scene.autoUpdate = false;
}
if ( Array.isArray( scene ) ) {
console.warn( 'THREE.VREffect.render() no longer supports arrays. Use object.layers instead.' );
scene = scene[ 0 ];
}
// When rendering we don't care what the recommended size is, only what the actual size
// of the backbuffer is.
var size = renderer.getSize();
var layers = vrDisplay.getLayers();
var leftBounds;
var rightBounds;
if ( layers.length ) {
var layer = layers[ 0 ];
leftBounds = layer.leftBounds !== null && layer.leftBounds.length === 4 ? layer.leftBounds : defaultLeftBounds;
rightBounds = layer.rightBounds !== null && layer.rightBounds.length === 4 ? layer.rightBounds : defaultRightBounds;
} else {
leftBounds = defaultLeftBounds;
rightBounds = defaultRightBounds;
}
renderRectL = {
x: Math.round( size.width * leftBounds[ 0 ] ),
y: Math.round( size.height * leftBounds[ 1 ] ),
width: Math.round( size.width * leftBounds[ 2 ] ),
height: Math.round( size.height * leftBounds[ 3 ] )
};
renderRectR = {
x: Math.round( size.width * rightBounds[ 0 ] ),
y: Math.round( size.height * rightBounds[ 1 ] ),
width: Math.round( size.width * rightBounds[ 2 ] ),
height: Math.round( size.height * rightBounds[ 3 ] )
};
if ( renderTarget ) {
renderer.setRenderTarget( renderTarget );
renderTarget.scissorTest = true;
} else {
renderer.setRenderTarget( null );
renderer.setScissorTest( true );
}
if ( renderer.autoClear || forceClear ) renderer.clear();
if ( camera.parent === null ) camera.updateMatrixWorld();
camera.matrixWorld.decompose( cameraL.position, cameraL.quaternion, cameraL.scale );
cameraR.position.copy( cameraL.position );
cameraR.quaternion.copy( cameraL.quaternion );
cameraR.scale.copy( cameraL.scale );
if ( vrDisplay.getFrameData ) {
vrDisplay.depthNear = camera.near;
vrDisplay.depthFar = camera.far;
vrDisplay.getFrameData( frameData );
cameraL.projectionMatrix.elements = frameData.leftProjectionMatrix;
cameraR.projectionMatrix.elements = frameData.rightProjectionMatrix;
getEyeMatrices( frameData );
cameraL.updateMatrix();
cameraL.matrix.multiply( eyeMatrixL );
cameraL.matrix.decompose( cameraL.position, cameraL.quaternion, cameraL.scale );
cameraR.updateMatrix();
cameraR.matrix.multiply( eyeMatrixR );
cameraR.matrix.decompose( cameraR.position, cameraR.quaternion, cameraR.scale );
} else {
var eyeParamsL = vrDisplay.getEyeParameters( 'left' );
var eyeParamsR = vrDisplay.getEyeParameters( 'right' );
cameraL.projectionMatrix = fovToProjection( eyeParamsL.fieldOfView, true, camera.near, camera.far );
cameraR.projectionMatrix = fovToProjection( eyeParamsR.fieldOfView, true, camera.near, camera.far );
eyeTranslationL.fromArray( eyeParamsL.offset );
eyeTranslationR.fromArray( eyeParamsR.offset );
cameraL.translateOnAxis( eyeTranslationL, cameraL.scale.x );
cameraR.translateOnAxis( eyeTranslationR, cameraR.scale.x );
}
// render left eye
if ( renderTarget ) {
renderTarget.viewport.set( renderRectL.x, renderRectL.y, renderRectL.width, renderRectL.height );
renderTarget.scissor.set( renderRectL.x, renderRectL.y, renderRectL.width, renderRectL.height );
} else {
renderer.setViewport( renderRectL.x, renderRectL.y, renderRectL.width, renderRectL.height );
renderer.setScissor( renderRectL.x, renderRectL.y, renderRectL.width, renderRectL.height );
}
renderer.render( scene, cameraL, renderTarget, forceClear );
// render right eye
if ( renderTarget ) {
renderTarget.viewport.set( renderRectR.x, renderRectR.y, renderRectR.width, renderRectR.height );
renderTarget.scissor.set( renderRectR.x, renderRectR.y, renderRectR.width, renderRectR.height );
} else {
renderer.setViewport( renderRectR.x, renderRectR.y, renderRectR.width, renderRectR.height );
renderer.setScissor( renderRectR.x, renderRectR.y, renderRectR.width, renderRectR.height );
}
renderer.render( scene, cameraR, renderTarget, forceClear );
if ( renderTarget ) {
renderTarget.viewport.set( 0, 0, size.width, size.height );
renderTarget.scissor.set( 0, 0, size.width, size.height );
renderTarget.scissorTest = false;
renderer.setRenderTarget( null );
} else {
renderer.setViewport( 0, 0, size.width, size.height );
renderer.setScissorTest( false );
}
if ( autoUpdate ) {
scene.autoUpdate = true;
}
if ( scope.autoSubmitFrame ) {
scope.submitFrame();
}
return;
}
// Regular render mode if not HMD
renderer.render( scene, camera, renderTarget, forceClear );
};
this.dispose = function () {
window.removeEventListener( 'vrdisplaypresentchange', onVRDisplayPresentChange, false );
};
//
var poseOrientation = new THREE.Quaternion();
var posePosition = new THREE.Vector3();
// Compute model matrices of the eyes with respect to the head.
function getEyeMatrices( frameData ) {
// Compute the matrix for the position of the head based on the pose
if ( frameData.pose.orientation ) {
poseOrientation.fromArray( frameData.pose.orientation );
headMatrix.makeRotationFromQuaternion( poseOrientation );
} else {
headMatrix.identity();
}
if ( frameData.pose.position ) {
posePosition.fromArray( frameData.pose.position );
headMatrix.setPosition( posePosition );
}
// The view matrix transforms vertices from sitting space to eye space. As such, the view matrix can be thought of as a product of two matrices:
// headToEyeMatrix * sittingToHeadMatrix
// The headMatrix that we've calculated above is the model matrix of the head in sitting space, which is the inverse of sittingToHeadMatrix.
// So when we multiply the view matrix with headMatrix, we're left with headToEyeMatrix:
// viewMatrix * headMatrix = headToEyeMatrix * sittingToHeadMatrix * headMatrix = headToEyeMatrix
eyeMatrixL.fromArray( frameData.leftViewMatrix );
eyeMatrixL.multiply( headMatrix );
eyeMatrixR.fromArray( frameData.rightViewMatrix );
eyeMatrixR.multiply( headMatrix );
// The eye's model matrix in head space is the inverse of headToEyeMatrix we calculated above.
eyeMatrixL.getInverse( eyeMatrixL );
eyeMatrixR.getInverse( eyeMatrixR );
}
function fovToNDCScaleOffset( fov ) {
var pxscale = 2.0 / ( fov.leftTan + fov.rightTan );
var pxoffset = ( fov.leftTan - fov.rightTan ) * pxscale * 0.5;
var pyscale = 2.0 / ( fov.upTan + fov.downTan );
var pyoffset = ( fov.upTan - fov.downTan ) * pyscale * 0.5;
return { scale: [ pxscale, pyscale ], offset: [ pxoffset, pyoffset ] };
}
function fovPortToProjection( fov, rightHanded, zNear, zFar ) {
rightHanded = rightHanded === undefined ? true : rightHanded;
zNear = zNear === undefined ? 0.01 : zNear;
zFar = zFar === undefined ? 10000.0 : zFar;
var handednessScale = rightHanded ? - 1.0 : 1.0;
// start with an identity matrix
var mobj = new THREE.Matrix4();
var m = mobj.elements;
// and with scale/offset info for normalized device coords
var scaleAndOffset = fovToNDCScaleOffset( fov );
// X result, map clip edges to [-w,+w]
m[ 0 * 4 + 0 ] = scaleAndOffset.scale[ 0 ];
m[ 0 * 4 + 1 ] = 0.0;
m[ 0 * 4 + 2 ] = scaleAndOffset.offset[ 0 ] * handednessScale;
m[ 0 * 4 + 3 ] = 0.0;
// Y result, map clip edges to [-w,+w]
// Y offset is negated because this proj matrix transforms from world coords with Y=up,
// but the NDC scaling has Y=down (thanks D3D?)
m[ 1 * 4 + 0 ] = 0.0;
m[ 1 * 4 + 1 ] = scaleAndOffset.scale[ 1 ];
m[ 1 * 4 + 2 ] = - scaleAndOffset.offset[ 1 ] * handednessScale;
m[ 1 * 4 + 3 ] = 0.0;
// Z result (up to the app)
m[ 2 * 4 + 0 ] = 0.0;
m[ 2 * 4 + 1 ] = 0.0;
m[ 2 * 4 + 2 ] = zFar / ( zNear - zFar ) * - handednessScale;
m[ 2 * 4 + 3 ] = ( zFar * zNear ) / ( zNear - zFar );
// W result (= Z in)
m[ 3 * 4 + 0 ] = 0.0;
m[ 3 * 4 + 1 ] = 0.0;
m[ 3 * 4 + 2 ] = handednessScale;
m[ 3 * 4 + 3 ] = 0.0;
mobj.transpose();
return mobj;
}
function fovToProjection( fov, rightHanded, zNear, zFar ) {
var DEG2RAD = Math.PI / 180.0;
var fovPort = {
upTan: Math.tan( fov.upDegrees * DEG2RAD ),
downTan: Math.tan( fov.downDegrees * DEG2RAD ),
leftTan: Math.tan( fov.leftDegrees * DEG2RAD ),
rightTan: Math.tan( fov.rightDegrees * DEG2RAD )
};
return fovPortToProjection( fovPort, rightHanded, zNear, zFar );
}
};