Doodle3D-Slicer/three.js-master/examples/js/effects/StereoEffect.js
2015-06-12 15:58:26 +02:00

141 lines
3.2 KiB
JavaScript
Executable File

/**
* @author alteredq / http://alteredqualia.com/
* @authod mrdoob / http://mrdoob.com/
* @authod arodic / http://aleksandarrodic.com/
* @authod fonserbc / http://fonserbc.github.io/
*
* Off-axis stereoscopic effect based on http://paulbourke.net/stereographics/stereorender/
*/
THREE.StereoEffect = function ( renderer ) {
// API
var scope = this;
this.eyeSeparation = 3;
this.focalLength = 15; // Distance to the non-parallax or projection plane
Object.defineProperties( this, {
separation: {
get: function () {
return scope.eyeSeparation;
},
set: function ( value ) {
console.warn( 'THREE.StereoEffect: .separation is now .eyeSeparation.' );
scope.eyeSeparation = value;
}
},
targetDistance: {
get: function () {
return scope.focalLength;
},
set: function ( value ) {
console.warn( 'THREE.StereoEffect: .targetDistance is now .focalLength.' );
scope.focalLength = value;
}
}
} );
// internals
var _width, _height;
var _position = new THREE.Vector3();
var _quaternion = new THREE.Quaternion();
var _scale = new THREE.Vector3();
var _cameraL = new THREE.PerspectiveCamera();
var _cameraR = new THREE.PerspectiveCamera();
var _fov;
var _outer, _inner, _top, _bottom;
var _ndfl, _halfFocalWidth, _halfFocalHeight;
var _innerFactor, _outerFactor;
// initialization
renderer.autoClear = false;
this.setSize = function ( width, height ) {
_width = width / 2;
_height = height;
renderer.setSize( width, height );
};
this.render = function ( scene, camera ) {
scene.updateMatrixWorld();
if ( camera.parent === undefined ) camera.updateMatrixWorld();
camera.matrixWorld.decompose( _position, _quaternion, _scale );
// Effective fov of the camera
_fov = THREE.Math.radToDeg( 2 * Math.atan( Math.tan( THREE.Math.degToRad( camera.fov ) * 0.5 ) / camera.zoom ) );
_ndfl = camera.near / this.focalLength;
_halfFocalHeight = Math.tan( THREE.Math.degToRad( _fov ) * 0.5 ) * this.focalLength;
_halfFocalWidth = _halfFocalHeight * 0.5 * camera.aspect;
_top = _halfFocalHeight * _ndfl;
_bottom = -_top;
_innerFactor = ( _halfFocalWidth + this.eyeSeparation / 2.0 ) / ( _halfFocalWidth * 2.0 );
_outerFactor = 1.0 - _innerFactor;
_outer = _halfFocalWidth * 2.0 * _ndfl * _outerFactor;
_inner = _halfFocalWidth * 2.0 * _ndfl * _innerFactor;
// left
_cameraL.projectionMatrix.makeFrustum(
-_outer,
_inner,
_bottom,
_top,
camera.near,
camera.far
);
_cameraL.position.copy( _position );
_cameraL.quaternion.copy( _quaternion );
_cameraL.translateX( - this.eyeSeparation / 2.0 );
// right
_cameraR.projectionMatrix.makeFrustum(
-_inner,
_outer,
_bottom,
_top,
camera.near,
camera.far
);
_cameraR.position.copy( _position );
_cameraR.quaternion.copy( _quaternion );
_cameraR.translateX( this.eyeSeparation / 2.0 );
//
renderer.clear();
renderer.enableScissorTest( true );
renderer.setScissor( 0, 0, _width, _height );
renderer.setViewport( 0, 0, _width, _height );
renderer.render( scene, _cameraL );
renderer.setScissor( _width, 0, _width, _height );
renderer.setViewport( _width, 0, _width, _height );
renderer.render( scene, _cameraR );
renderer.enableScissorTest( false );
};
};