Sequence Output Example

Location: examples/rappture2/sequence/

This example demonstrates the <sequence> output type – an animated series of frames (images or curves) with playback controls.

tool.xml

<?xml version="1.0"?>
<run xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:noNamespaceSchemaLocation="../../../rappture2web/contract.xsd">
<tool>
  <title>sequence (rappture2web)</title>
  <about>Example of a Rappture &lt;sequence&gt; object.

When you click Simulate, the input image is rotated several times to produce an animated sequence.
  </about>
  <command>python3 @tool/sequence.py @driver</command>
  <contract>
    <input>
      <integer id="nframes">
        <about>
          <label>Number of frames</label>
          <description>Determines the number of frames in the output sequence.</description>
        </about>
        <min>2</min>
        <max>50</max>
        <default>4</default>
      </integer>
    </input>
    <output>
      <sequence id="outs"><about><label>Image Sequence</label><description>Animated sequence of generated image frames.</description></about></sequence>
    </output>
  </contract>
</tool>
<input>
  <loader>
    <about>
      <label>Image</label>
      <description>Use this to load different images.</description>
    </about>
    <example>*.xml</example>
    <default>nanohub.xml</default>
  </loader>
  <image>
    <about><diffs>ignore</diffs></about>
    <resize>height=200</resize>
  </image>
  <integer id="nframes">
    <about>
      <label>Number of frames</label>
      <description>Determines the number of frames in the output sequence.</description>
    </about>
    <min>2</min>
    <max>50</max>
    <default>4</default>
  </integer>
</input>
</run>

Key concepts

• <image><resize>height=200</resize></image> constrains the input image preview size.

• Sequence frames can contain images, curves, or fields.

• rappture2web renders a slider and play/pause controls for animation.

Running

rappture2web examples/rappture2/sequence/