unction containing the implementation of the command as the second parameter to
`registerCommand`.

## Get up and running straight away
* press `F5` to open a new window with your extension loaded
* run your command from the command palette by pressing (`Ctrl+Shift+P` or `Cmd+Shift+P` on Mac) and typing `Hello World`
* set breakpoints in your code inside `src/extension.ts` to debug your extension
* find output from your extension in the debug console

## Make changes
* you can relaunch the extension from the debug toolbar after changing code in `src/extension.ts`
* you can also reload (`Ctrl+R` or `Cmd+R` on Mac) the VS Code window with your extension to load your changes

## Explore the API
* you can open the full set of our API when you open the file `node_modules/vscode/vscode.d.ts`

## Run tests
* open the debug viewlet (`Ctrl+Shift+D` or `Cmd+Shift+D` on Mac) and from the launch configuration dropdown pick `Launch Tests`
* press `F5` to run the tests in a new window with your extension loaded
* see the output of the test result in the debug console
* make changes to `test/extension.test.ts` or create new test files inside the `test` folder
    * by convention, the test runner will only consider files matching the name pattern `**.test.ts`
    * you can create folders inside the `test` folder to structure your tests any way you want

# PostProcessStage

The `vc-stage-process-post` component is used to run a post-process stage on either the texture rendered by the scene or the output of a previous post-process stage.

## Example

### Load a PostProcessStage

#### Preview

<doc-preview>
  <template>
    <div class="viewer">
      <vc-viewer @ready="ready" >
        <vc-stage-process-post :fragmentShader="fragmentShader"></vc-stage-process-post>
      </vc-viewer>
    </div>
  </template>
  <script>
    export default {
      data () {
        return {
          fragmentShader: `
            uniform sampler2D colorTexture;
            varying vec2 v_textureCoordinates;
            float hash(float x){
          