AS3中求一条直线上点的坐标

/* note: general include to not repeat the GoogleAnalyticsAPI redirection on a _tracker property */ // ---------------------------------------- // Basic Configuration // Methods that you use for customizing all aspects of Google Analytics reporting. /** * Returns the Google Analytics tracking ID for this tracker object. * If you are tracking pages on your website in multiple accounts, * you can use this method to determine the account that is associated * with a particular tracker object. * @return the Account ID this tracker object is instantiated with. */ public function getAccount():String { return _tracker.getAccount(); } /** * Returns the GATC version number. * @return GATC version number. */ public function getVersion():String { return _tracker.getVersion(); } /** * Reset the current session clearing the utmb and utmc cookies. */ public function resetSession():void { _tracker.resetSession(); } /** * Sets the new sample rate. * If your website is particularly large and subject to heavy traffic spikes, * then setting the sample rate ensures un-interrupted report tracking. * * Sampling in Google Analytics occurs consistently across unique visitors, * so there is integrity in trending and reporting even when sampling is enabled, * because unique visitors remain included or excluded from the sample, * as set from the initiation of sampling. * * @param newRate New sample rate to set. Provide a numeric as a whole percentage, 0.1 being 10%, 1 being 100%. */ public function setSampleRate(newRate:Number):void { _tracker.setSampleRate(newRate); } /** * Sets the new session timeout in seconds. By default, session timeout is set to 30 minutes (1800 seconds). * * <p>Session timeout is used to compute visits, * since a visit ends after 30 minutes of browser inactivity or upon browser exit.</p> * <p>If you want to change the definition of a "session" for your particular needs, * you can pass in the number of seconds to define a new value.</p> * * <p>This will impact the Visits reports in every section where the number of * visits are calculated, and where visits are used in computing other values.</p> * <p>For example, the number of visits will increase if you shorten the session timeout, * and will decrease if you increase the session timeout.</p> * * @param newTimeout New session timeout to set in seconds. */ public function setSessionTimeout(newTimeout:int):void { _tracker.setSessionTimeout(newTimeout); } /** * Sets a user-defined value. * The value you supply appears as an option in the Segment pull-down for the Traffic Sources reports. * You can use this value to provide additional segmentation on users to your website. * * For example, you could have a login page or a form that triggers a value based on a visitor's input, * such as a preference the visitor chooses, or a privacy option. * This variable is then updated in the cookie for that visitor. * * @param newVal New user defined value to set. */ public function setVar(newVal:String):void { _tracker.setVar(newVal); } /** * Main logic for GATC (Google Analytic Tracker Code). * If linker functionalities are enabled, it attempts to extract cookie values from the URL. * Otherwise, it tries to extract cookie values from document.cookie. * It also updates or creates cookies as necessary, then writes them back to the document object. * Gathers all the appropriate metrics to send to the UCFE (Urchin Collector Front-end). * * @param pageURL Optional parameter to indicate what page URL to track metrics under. When using this option, use a beginning slash (/) to indicate the page URL. */ public function trackPageview(pageURL:String=""):void { _tracker.trackPageview(pageURL); } // ---------------------------------------- // Campaign Tracking // Methods that you use for setting up and customizing campaign tracking in Google Analytics reporting. /** * Allows the # sign to be used as a query string delimiter in campaign tracking. * This option is disabled by default. * * Typically, campaign tracking URLs are comprised of the question mark (?) separator * and the ampersand (&) as delimiters for the key/value pairs that make up the query. * By enabling this option, your campaign tracking URLs can use a pound (#) sign * instead of the question mark (?). * * @param enable If this parameter is set to true, then campaign will use anchors. Else, campaign will use search strings. */ public function setAllowAnchor(enable:Boolean):void { _tracker.setAllowAnchor(enable); } /** * Sets the campaign ad content key. * The campaign content key is used to retrieve the ad content (description) * of your advertising campaign from your campaign URLs. * Use this function on the landing page defined in your campaign. * * @param newCampContentKey New campaign content key to set. */ public function setCampContentKey(newCampContentKey:String):void { _tracker.setCampContentKey(newCampContentKey); } /** * Sets the campaign medium key, * which is used to retrieve the medium from your campaign URLs. * The medium appears as a segment option in the Campaigns report. * * @param newCampMedKey Campaign medium key to set. */ public function setCampMediumKey(newCampMedKey:String):void { _tracker.setCampMediumKey(newCampMedKey); } /** * Sets the campaign name key. * The campaign name key is used to retrieve the name of your advertising campaign from your campaign URLs. * You would use this function on any page that you want to track click-campaigns on. * * @param newCampNameKey Campaign name key. */ public function setCampNameKey(newCampNameKey:String):void { _tracker.setCampNameKey(newCampNameKey); } /** * Sets the campaign no-override key variable, * which is used to retrieve the campaign no-override value from the URL. * By default, this variable and its value are not set. * * For campaign tracking and conversion measurement, this means that, by default, * the most recent impression is the campaign that is credited in your conversion tracking. * If you prefer to associate the first-most impressions to a conversion, * you would set this method to a specific key, and in the situation where you use custom campaign variables, * you would use this method to set the var