487 lines
17 KiB
JavaScript
487 lines
17 KiB
JavaScript
(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
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/*
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* Copyright 2015 Google Inc. All Rights Reserved.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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var Distortion = require('./distortion/distortion.js');
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var Util = require('./util.js');
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function Device(params) {
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this.width = params.width || Util.getScreenWidth();
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this.height = params.height || Util.getScreenHeight();
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this.widthMeters = params.widthMeters;
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this.heightMeters = params.heightMeters;
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this.bevelMeters = params.bevelMeters;
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}
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// Fallback Android device (based on Nexus 5 measurements) for use when
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// we can't recognize an Android device.
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var DEFAULT_ANDROID = new Device({
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widthMeters: 0.110,
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heightMeters: 0.062,
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bevelMeters: 0.004
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});
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// Fallback iOS device (based on iPhone6) for use when
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// we can't recognize an Android device.
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var DEFAULT_IOS = new Device({
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widthMeters: 0.1038,
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heightMeters: 0.0584,
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bevelMeters: 0.004
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});
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var Viewers = {
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CardboardV1: new CardboardViewer({
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id: 'CardboardV1',
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label: 'Cardboard I/O 2014',
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fov: 40,
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interLensDistance: 0.060,
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baselineLensDistance: 0.035,
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screenLensDistance: 0.042,
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distortionCoefficients: [0.441, 0.156],
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inverseCoefficients: [-0.4410035, 0.42756155, -0.4804439, 0.5460139,
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-0.58821183, 0.5733938, -0.48303202, 0.33299083, -0.17573841,
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0.0651772, -0.01488963, 0.001559834]
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}),
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CardboardV2: new CardboardViewer({
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id: 'CardboardV2',
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label: 'Cardboard I/O 2015',
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fov: 60,
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interLensDistance: 0.064,
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baselineLensDistance: 0.035,
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screenLensDistance: 0.039,
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distortionCoefficients: [0.34, 0.55],
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inverseCoefficients: [-0.33836704, -0.18162185, 0.862655, -1.2462051,
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1.0560602, -0.58208317, 0.21609078, -0.05444823, 0.009177956,
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-9.904169E-4, 6.183535E-5, -1.6981803E-6]
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})
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};
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var DEFAULT_LEFT_CENTER = {x: 0.5, y: 0.5};
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var DEFAULT_RIGHT_CENTER = {x: 0.5, y: 0.5};
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/**
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* Manages information about the device and the viewer.
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*
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* deviceParams indicates the parameters of the device to use (generally
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* obtained from dpdb.getDeviceParams()). Can be null to mean no device
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* params were found.
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*/
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function DeviceInfo(deviceParams) {
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this.viewer = Viewers.CardboardV1;
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this.updateDeviceParams(deviceParams);
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}
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DeviceInfo.prototype.updateDeviceParams = function(deviceParams) {
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this.device = this.determineDevice_(deviceParams) || this.device;
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};
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DeviceInfo.prototype.getDevice = function() {
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return this.device;
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};
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DeviceInfo.prototype.setViewer = function(viewer) {
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this.viewer = viewer;
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};
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DeviceInfo.prototype.determineDevice_ = function(deviceParams) {
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if (!deviceParams) {
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// No parameters, so use a default.
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if (Util.isIOS()) {
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console.warn("Using fallback Android device measurements.");
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return DEFAULT_IOS;
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} else {
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console.warn("Using fallback iOS device measurements.");
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return DEFAULT_ANDROID;
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}
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}
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// Compute device screen dimensions based on deviceParams.
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var METERS_PER_INCH = 0.0254;
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var metersPerPixelX = METERS_PER_INCH / deviceParams.xdpi;
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var metersPerPixelY = METERS_PER_INCH / deviceParams.ydpi;
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var width = Util.getScreenWidth();
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var height = Util.getScreenHeight();
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return new Device({
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widthMeters: metersPerPixelX * width,
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heightMeters: metersPerPixelY * height,
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bevelMeters: deviceParams.bevelMm * 0.001,
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});
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};
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/**
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* Calculates field of view for the left eye.
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*/
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DeviceInfo.prototype.getDistortedFieldOfViewLeftEye = function() {
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var viewer = this.viewer;
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var device = this.device;
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var distortion = new Distortion(viewer.distortionCoefficients);
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// Device.height and device.width for device in portrait mode, so transpose.
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var eyeToScreenDistance = viewer.screenLensDistance;
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var outerDist = (device.widthMeters - viewer.interLensDistance) / 2;
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var innerDist = viewer.interLensDistance / 2;
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var bottomDist = viewer.baselineLensDistance - device.bevelMeters;
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var topDist = device.heightMeters - bottomDist;
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var outerAngle = THREE.Math.radToDeg(Math.atan(
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distortion.distort(outerDist / eyeToScreenDistance)));
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var innerAngle = THREE.Math.radToDeg(Math.atan(
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distortion.distort(innerDist / eyeToScreenDistance)));
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var bottomAngle = THREE.Math.radToDeg(Math.atan(
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distortion.distort(bottomDist / eyeToScreenDistance)));
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var topAngle = THREE.Math.radToDeg(Math.atan(
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distortion.distort(topDist / eyeToScreenDistance)));
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return {
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leftDegrees: Math.min(outerAngle, viewer.fov),
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rightDegrees: Math.min(innerAngle, viewer.fov),
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downDegrees: Math.min(bottomAngle, viewer.fov),
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upDegrees: Math.min(topAngle, viewer.fov)
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}
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};
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DeviceInfo.prototype.getFieldOfViewLeftEye = function(opt_isUndistorted) {
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return opt_isUndistorted ? this.getUndistortedFieldOfViewLeftEye() :
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this.getDistortedFieldOfViewLeftEye();
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};
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DeviceInfo.prototype.getFieldOfViewRightEye = function(opt_isUndistorted) {
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var fov = this.getFieldOfViewLeftEye(opt_isUndistorted);
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return {
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leftDegrees: fov.rightDegrees,
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rightDegrees: fov.leftDegrees,
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upDegrees: fov.upDegrees,
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downDegrees: fov.downDegrees
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};
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};
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/**
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* Calculates a projection matrix for the left eye.
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*/
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DeviceInfo.prototype.getProjectionMatrixLeftEye = function(opt_isUndistorted) {
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var fov = this.getFieldOfViewLeftEye(opt_isUndistorted);
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var projectionMatrix = new THREE.Matrix4();
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var near = 0.1;
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var far = 1000;
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var left = Math.tan(THREE.Math.degToRad(fov.leftDegrees)) * near;
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var right = Math.tan(THREE.Math.degToRad(fov.rightDegrees)) * near;
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var bottom = Math.tan(THREE.Math.degToRad(fov.downDegrees)) * near;
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var top = Math.tan(THREE.Math.degToRad(fov.upDegrees)) * near;
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// makeFrustum expects units in tan-angle space.
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projectionMatrix.makeFrustum(-left, right, -bottom, top, near, far);
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return projectionMatrix;
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};
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DeviceInfo.prototype.getUndistortedViewportLeftEye = function() {
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var p = this.getUndistortedParams_();
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var viewer = this.viewer;
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var device = this.device;
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var eyeToScreenDistance = viewer.screenLensDistance;
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var screenWidth = device.widthMeters / eyeToScreenDistance;
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var screenHeight = device.heightMeters / eyeToScreenDistance;
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var xPxPerTanAngle = device.width / screenWidth;
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var yPxPerTanAngle = device.height / screenHeight;
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var x = Math.round((p.eyePosX - p.outerDist) * xPxPerTanAngle);
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var y = Math.round((p.eyePosY - p.bottomDist) * yPxPerTanAngle);
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return {
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x: x,
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y: y,
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width: Math.round((p.eyePosX + p.innerDist) * xPxPerTanAngle) - x,
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height: Math.round((p.eyePosY + p.topDist) * yPxPerTanAngle) - y
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};
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};
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/**
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* Calculates undistorted field of view for the left eye.
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*/
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DeviceInfo.prototype.getUndistortedFieldOfViewLeftEye = function() {
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var p = this.getUndistortedParams_();
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return {
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leftDegrees: THREE.Math.radToDeg(Math.atan(p.outerDist)),
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rightDegrees: THREE.Math.radToDeg(Math.atan(p.innerDist)),
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downDegrees: THREE.Math.radToDeg(Math.atan(p.bottomDist)),
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upDegrees: THREE.Math.radToDeg(Math.atan(p.topDist))
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};
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};
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DeviceInfo.prototype.getUndistortedParams_ = function() {
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var viewer = this.viewer;
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var device = this.device;
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var distortion = new Distortion(viewer.distortionCoefficients);
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// Most of these variables in tan-angle units.
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var eyeToScreenDistance = viewer.screenLensDistance;
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var halfLensDistance = viewer.interLensDistance / 2 / eyeToScreenDistance;
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var screenWidth = device.widthMeters / eyeToScreenDistance;
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var screenHeight = device.heightMeters / eyeToScreenDistance;
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var eyePosX = screenWidth / 2 - halfLensDistance;
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var eyePosY = (viewer.baselineLensDistance - device.bevelMeters) / eyeToScreenDistance;
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var maxFov = viewer.fov;
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var viewerMax = distortion.distortInverse(Math.tan(THREE.Math.degToRad(maxFov)));
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var outerDist = Math.min(eyePosX, viewerMax);
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var innerDist = Math.min(halfLensDistance, viewerMax);
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var bottomDist = Math.min(eyePosY, viewerMax);
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var topDist = Math.min(screenHeight - eyePosY, viewerMax);
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return {
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outerDist: outerDist,
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innerDist: innerDist,
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topDist: topDist,
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bottomDist: bottomDist,
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eyePosX: eyePosX,
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eyePosY: eyePosY
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};
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};
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function CardboardViewer(params) {
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// A machine readable ID.
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this.id = params.id;
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// A human readable label.
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this.label = params.label;
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// Field of view in degrees (per side).
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this.fov = params.fov;
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// Distance between lens centers in meters.
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this.interLensDistance = params.interLensDistance;
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// Distance between viewer baseline and lens center in meters.
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this.baselineLensDistance = params.baselineLensDistance;
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// Screen-to-lens distance in meters.
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this.screenLensDistance = params.screenLensDistance;
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// Distortion coefficients.
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this.distortionCoefficients = params.distortionCoefficients;
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// Inverse distortion coefficients.
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// TODO: Calculate these from distortionCoefficients in the future.
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this.inverseCoefficients = params.inverseCoefficients;
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}
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// Export viewer information.
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DeviceInfo.Viewers = Viewers;
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module.exports = DeviceInfo;
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},{"./distortion/distortion.js":2,"./util.js":3}],2:[function(require,module,exports){
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/**
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* TODO(smus): Implement coefficient inversion.
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*/
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function Distortion(coefficients) {
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this.coefficients = coefficients;
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}
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/**
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* Calculates the inverse distortion for a radius.
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* </p><p>
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* Allows to compute the original undistorted radius from a distorted one.
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* See also getApproximateInverseDistortion() for a faster but potentially
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* less accurate method.
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*
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* @param {Number} radius Distorted radius from the lens center in tan-angle units.
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* @return {Number} The undistorted radius in tan-angle units.
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*/
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Distortion.prototype.distortInverse = function(radius) {
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// Secant method.
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var r0 = radius / 0.9;
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var r1 = radius * 0.9;
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var dr0 = radius - this.distort(r0);
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while (Math.abs(r1 - r0) > 0.0001 /** 0.1mm */) {
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var dr1 = radius - this.distort(r1);
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var r2 = r1 - dr1 * ((r1 - r0) / (dr1 - dr0));
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r0 = r1;
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r1 = r2;
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dr0 = dr1;
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}
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return r1;
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}
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/**
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* Distorts a radius by its distortion factor from the center of the lenses.
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*
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* @param {Number} radius Radius from the lens center in tan-angle units.
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* @return {Number} The distorted radius in tan-angle units.
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*/
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Distortion.prototype.distort = function(radius) {
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return radius * this.distortionFactor_(radius);
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}
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/**
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* Returns the distortion factor of a point.
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*
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* @param {Number} radius Radius of the point from the lens center in tan-angle units.
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* @return {Number} The distortion factor. Multiply by this factor to distort points.
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*/
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Distortion.prototype.distortionFactor_ = function(radius) {
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var result = 1.0;
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var rFactor = 1.0;
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var rSquared = radius * radius;
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for (var i = 0; i < this.coefficients.length; i++) {
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var ki = this.coefficients[i];
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rFactor *= rSquared;
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result += ki * rFactor;
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}
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return result;
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}
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module.exports = Distortion;
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},{}],3:[function(require,module,exports){
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/*
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* Copyright 2015 Google Inc. All Rights Reserved.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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var Util = {};
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Util.base64 = function(mimeType, base64) {
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return 'data:' + mimeType + ';base64,' + base64;
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};
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Util.isMobile = function() {
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var check = false;
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(function(a){if(/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0,4)))check = true})(navigator.userAgent||navigator.vendor||window.opera);
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return check;
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};
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Util.isFirefox = function() {
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return /firefox/i.test(navigator.userAgent);
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};
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Util.isIOS = function() {
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return /(iPad|iPhone|iPod)/g.test(navigator.userAgent);
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};
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Util.isIFrame = function() {
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try {
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return window.self !== window.top;
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} catch (e) {
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return true;
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}
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};
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Util.appendQueryParameter = function(url, key, value) {
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// Determine delimiter based on if the URL already GET parameters in it.
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var delimiter = (url.indexOf('?') < 0 ? '?' : '&');
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url += delimiter + key + '=' + value;
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return url;
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};
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// From http://goo.gl/4WX3tg
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Util.getQueryParameter = function(name) {
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name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
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var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
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results = regex.exec(location.search);
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return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
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};
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Util.isLandscapeMode = function() {
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return (window.orientation == 90 || window.orientation == -90);
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};
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Util.getScreenWidth = function() {
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return Math.max(window.screen.width, window.screen.height) *
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window.devicePixelRatio;
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};
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Util.getScreenHeight = function() {
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return Math.min(window.screen.width, window.screen.height) *
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window.devicePixelRatio;
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};
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/**
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* Utility to convert the projection matrix to a vector accepted by the shader.
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*
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* @param {Object} opt_params A rectangle to scale this vector by.
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*/
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Util.projectionMatrixToVector_ = function(matrix, opt_params) {
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var params = opt_params || {};
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var xScale = params.xScale || 1;
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var yScale = params.yScale || 1;
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var xTrans = params.xTrans || 0;
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var yTrans = params.yTrans || 0;
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var elements = matrix.elements;
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var vec = new THREE.Vector4();
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vec.set(elements[4*0 + 0] * xScale,
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elements[4*1 + 1] * yScale,
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elements[4*2 + 0] - 1 - xTrans,
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elements[4*2 + 1] - 1 - yTrans).divideScalar(2);
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return vec;
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};
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Util.leftProjectionVectorToRight_ = function(left) {
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//projectionLeft + vec4(0.0, 0.0, 1.0, 0.0)) * vec4(1.0, 1.0, -1.0, 1.0);
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var out = new THREE.Vector4(0, 0, 1, 0);
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out.add(left); // out = left + (0, 0, 1, 0).
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out.z *= -1; // Flip z.
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return out;
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};
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module.exports = Util;
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},{}],4:[function(require,module,exports){
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var DeviceInfo = require('../src/device-info.js');
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var di = new DeviceInfo();
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var centroid = di.getLeftEyeCenter();
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// Size the canvas. Render the centroid.
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var canvas = document.querySelector('canvas');
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var w = window.innerWidth;
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var h = window.innerHeight;
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var x = centroid.x * w/2;
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var y = centroid.y * h;
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var size = 10;
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canvas.width = w;
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canvas.height = h;
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var ctx = canvas.getContext('2d');
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ctx.clearRect(0, 0, w, h);
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ctx.fillStyle = 'black';
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ctx.fillRect(x - size/2, y - size/2, size, size);
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console.log('Placing eye at (%d, %d).', x, y);
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},{"../src/device-info.js":1}]},{},[4]);
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