2020-01-28 05:39:41 +01:00
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<!--
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Copyright JS Foundation and other contributors, http://js.foundation
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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<script type="text/x-red" data-help-name="range">
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<p>将数值映射为另一个区间的数值</p>
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<h3>输入</h3>
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<dl class="message-properties">
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<dt>payload<span class="property-type">数值</span></dt>
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2020-01-29 11:21:50 +01:00
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<dd>有效荷载<i>一定</i>得是一个数值. 否则则会映射失败。</dd>
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2020-01-28 05:39:41 +01:00
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</dl>
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<h3>输出</h3>
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<dl class="message-properties">
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<dt>payload<span class="property-type">数值</span></dt>
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<dd>被映射到新区间的数值。</dd>
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</dl>
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<h3>详细</h3>
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<p>该节点将线性缩放所接收到的数值。在默认情况下，结果不限于节点中定义的范围。</p>
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<p><i>缩放并限制到目标范围</i>表示结果永远不会超出目标范围内指定的范围。</p>
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<p><i>在目标范围内缩放并折叠</i>表示结果将会被限制（折叠）在目标范围内。</p>
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<p>例如，输入0-10映射到0-100。</p>
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<table style="outline-width:#888 solid thin">
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<tr><th width="80px">模式</th><th width="80px">输入</th><th width="80px">输出</th></tr>
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<tr><td><center>scale</center></td><td><center>12</center></td><td><center>120</center></td></tr>
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<tr><td><center>limit</center></td><td><center>12</center></td><td><center>100</center></td></tr>
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<tr><td><center>wrap</center></td><td><center>12</center></td><td><center>20</center></td></tr>
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</table>
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</script>
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