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CALCMODE Attribute | calcMode Property

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This topic documents a feature of HTML+TIME 2.0, which is obsolete as of Windows Internet Explorer 9.

Sets or gets the interpolation mode for the animation.

Syntax

HTML <ELEMENT CALCMODE = sMode... >
Scripting [ sMode = ] object.calcMode [ = sMode ]

Possible Values

sMode String that specifies or receives one of the following values.
discrete
The animation jumps from one value to the next value, with no interpolation.
linear
Default. The animation uses simple linear interpolation between values to calculate the animation function.
paced
The animation defines an even pace of change across the animation. This is supported only for attribute values that define a linear numeric range, and for which a notion of distance between points can be calculated, such as width or height.
spline
The animation interpolates from one value to the next value, according to a time function defined by a cubic Bezier spline. The points of the spline are defined in the keyTimes property, and the control points for each interval are defined in the keySplines property.

The property is read/write. The property has a default value of linear.

Remarks

The default value for the t:ANIMATEMOTION element is paced.

If an attribute, for example, a string value, does not support linear interpolation; then discrete interpolation is used.

When this property is set to a value of discrete, the duration of the animation is divided into equal time periods that depend on the values assigned to one or more of the following attributes: TO, FROM, BY, VALUES, or PATH. As one time period moves to the next time period, the animation jumps to the next value with no interpolation. The following is a list of examples.

  • VALUES = "0.3;0.6;0.8"

    The animation spends one-third of its duration at each value (0.3, 0.6, and 0.8).

  • VALUES = "0.3;0.6"

    The animation spends one-half of its duration at each value (0.3 and 0.6).

  • FROM = "0" TO = "0.8"

    When the FROM attribute is used with the TO attribute or the BY attribute, one-half of its duration is spent at the value of the FROM attribute, and one-half of its duration is spent at the value of the TO attribute or the BY attribute (0 and 0.8).

  • TO = "0.8"

    When the FROM attribute is omitted, the animation spends 100 percent of its duration at the value of the TO attribute or the BY attribute (0.8).

Example

This example uses the calcMode property to demonstrate how to set the interpolation mode for an animation.

<HTML XMLNS:t="urn:schemas-microsoft-com:time">
<HEAD>
<TITLE>calcmode Property</TITLE>
<?IMPORT namespace="t" implementation="#default#time2">

<SCRIPT>
function btnEnable(){
//After element's timeline has ended, enable buttons.
    b1.disabled=false;
    b2.disabled=false;
    b3.disabled=false;
    b4.disabled=false;
}

function btnDisable(){
//Element's timeline begins; disable buttons.
    b1.disabled=true;
    b2.disabled=true;
    b3.disabled=true;
    b4.disabled=true;
}
</SCRIPT>

<STYLE>
    .time{ behavior: url(#default#time2);}
</STYLE>
</HEAD>

<BODY TOPMARGIN=0 LEFTMARGIN=0 BGPROPERTIES="FIXED" BGCOLOR="#FFFFFF"
    LINK="#000000" VLINK="#808080" ALINK="#000000">
<H2 style="position:absolute;top:35px;">Click one of the buttons below.</H2>
<P style="position:absolute;top:65px;">This example demonstrates each of the
    possible values for the calcMode property.</P>

<DIV id="t1" style="position:absolute;top:75px;left:50px;height:100px;
    width:100px;background-color:yellow;text-align:center;font-size:large;
    visibility:hidden">
</DIV>
<t:animate id="tt1" begin="b1.click + 1;" dur="4s" from="50" to="410"
    targetElement="t1" attributeName="left" fill="remove"
    onbegin="btnDisable();" onend="t1.style.visibility='hidden';btnEnable();"/>

<DIV id="t2" style="position:absolute;top:75px;left:50px;height:100px;
    width:100px;background-color:yellow;text-align:center;font-size:large;
    visibility:hidden">
</DIV>
<t:animate id="tt2" begin="b2.click + 1;" calcmode="discrete" dur="4s"
    from="50" to="410" targetElement="t2" attributeName="left" fill="remove"
    onbegin="btnDisable();" onend="t2.style.visibility='hidden';btnEnable();"/>

<DIV id="t3" style="position:absolute;top:75px;left:50px;height:100px;
    width:100px;background-color:yellow;text-align:center;font-size:large;
    visibility:hidden">
</DIV>
<t:animate id="tt3" begin="b3.click + 1" dur="4s" calcMode="paced" from="50"
    by="335" targetElement="t3" attributeName="left" fill="remove"
    onbegin="btnDisable();" onend="t3.style.visibility='hidden';btnEnable();"/>

<DIV id="t4" style="position:absolute;z-index=1;top:75px;left:50px;
    height:100px;width:100px;background-color:yellow;text-align:center;
    font-size:large;visibility:hidden">
</DIV>
<t:animate id="tt4" begin="b4.click + 1" dur="4s" calcMode="spline"
    keySplines="0 0 1 1" keyTimes="0; 1" values="200;410" targetElement="t4"
    attributeName="left" fill="freeze" onbegin="btnDisable();"
    onend="t4.style.visibility='hidden';btnEnable();"/>

<P style="position:relative;top:175px;">
<BUTTON id="b1" onclick="t1.style.visibility='visible';tt1.calcmode='linear';
    t1.innerText='Linear Example';" style="font-weight:bold;">Default Linear</BUTTON>
<BUTTON id="b2" onclick="t2.style.visibility='visible';
    t2.innerText='Discrete Example';">Show Discrete</BUTTON>
<BUTTON id="b3" onclick="t3.style.visibility='visible';
    t3.innerText='Paced Example';">Show Paced</BUTTON>
<BUTTON id="b4" onclick="t4.style.visibility='visible';
    t4.innerText='Spline Example';">Show Spline</BUTTON>
</BODY>
</HTML>

Code example: http://samples.msdn.microsoft.com/workshop/samples/author/behaviors/calcmode.htm

Applies To

t:ANIMATE, t:ANIMATECOLOR

See Also

Introduction to HTML+TIME