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Stop Condition for constant speed motion

Source: Internet
Author: User
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********** ******************************

<! Doctype HTML>

<HTML>
<Head lang = "en">
<Meta charset = "UTF-8">
<Title> </title>
<Style type = "text/CSS">
Body {margin: 0; padding: 0 ;}
Div {width: 100px; Height: 100px; Background: red; position: absolute; left: 0 ;}
SPAN {width: 0; Height: 600px; position: fixed; left: 600px; top: 0; border-left: 1px solid red ;}
</Style>
</Head>
<Body>
<Div> </div>
<Span> </span>
</Body>
</Html>
<SCRIPT type = "text/JavaScript">
VaR odiv = Document. getelementsbytagname ("Div") [0];
Domove (odiv, 600 );
VaR timer;
VaR speed;
Function domove (OBJ, target)
{
Speed = 10;


OBJ. onclick = function (){
Timer = setinterval (function (){
OBJ. style. Left = obj. offsetleft + speed + "PX ";
If (obj. offsetleft = target) {clearinterval (timer );}
//// When you click it again, it will continue to exercise. Here = is a problem.
}, 30)
}
}

</SCRIPT>


* ************************** Constant speed motion 2 ********** ******************************

<! Doctype HTML>
<HTML>
<Head lang = "en">
<Meta charset = "UTF-8">
<Title> </title>
<Style type = "text/CSS">
Body {margin: 0; padding: 0 ;}
Div {width: 100px; Height: 100px; Background: red; position: absolute; left: 0 ;}
SPAN {width: 0; Height: 600px; position: fixed; left: 600px; top: 0; border-left: 1px solid red ;}
</Style>
</Head>
<Body>
<Input type = "button" value = "buttons" onclick = "startmove ()"/>
<Div> </div>
<Span> </span>
</Body>
</Html>
<SCRIPT type = "text/JavaScript">
VaR timer = NULL; // The timer must be placed outside the function to avoid enabling
Function startmove ()
{
VaR odiv = Document. getelementsbytagname ("Div") [0];
Clearinterval (timer); // removes all timers to enable a timer for each click.
Timer = setinterval (function (){
VaR speed = 10;
If (odiv. offsetleft> = 600) {clearinterval (timer) ;}// already arrived, the condition in if must be> =
Else {odiv. style. Left = odiv. offsetleft + speed + "PX";} // not reached
}, 30)


}
</SCRIPT>



********** ******************************

<! Doctype HTML>
<HTML>
<Head lang = "en">
<Meta charset = "UTF-8">
<Title> </title>
<Style type = "text/CSS">
Body {margin: 0; padding: 0 ;}
Div {width: 100px; Height: 100px; Background: red; position: absolute; left: 0 ;}
SPAN {width: 0; Height: 600px; position: fixed; left: 600px; top: 0; border-left: 1px solid red ;}
</Style>
</Head>
<Body>
<Input type = "button" value = "buttons" onclick = "startmove (600)"/>
<Div> </div>
<Span> </span>
</Body>
</Html>
<SCRIPT type = "text/JavaScript">
VaR timer = NULL; // The timer must be placed outside the function to avoid enabling
Function startmove (itarget)
{
VaR odiv = Document. getelementsbytagname ("Div") [0];
Clearinterval (timer); // removes all timers to enable a timer for each click.
Timer = setinterval (function (){
VaR speed = 10;
If (itarget-oDiv.offsetLeft) <speed) // if it is not enough to run the timer again when the distance, of course> = is also a stop condition, there are two common stop Conditions
{
Odiv. offsetleft = itarget;
Clearinterval (timer );
}
Else {odiv. style. Left = odiv. offsetleft + speed + "PX";} // not reached
}, 30)


}
</SCRIPT>

Stop Condition for constant speed motion

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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