add post processing example

examples/PostProcessing.tsx

@@ -0,0 +1,47 @@
+import React, { useEffect } from 'react'
+
+import { getMutableState, useHookstate } from '@etherealengine/hyperflux'
+
+import { LocationIcons } from '@etherealengine/client-core/src/components/LocationIcons'
+import { PostProcessingSettingsEditor } from '@etherealengine/editor/src/components/properties/PostProcessingSettingsEditor'
+import { EditorControlFunctions } from '@etherealengine/editor/src/functions/EditorControlFunctions'
+import { SelectionState } from '@etherealengine/editor/src/services/SelectionServices'
+import { EngineState } from '@etherealengine/engine/src/ecs/classes/EngineState'
+import { Entity } from '@etherealengine/engine/src/ecs/classes/Entity'
+import { SceneState } from '@etherealengine/engine/src/ecs/classes/Scene'
+import { setComponent } from '@etherealengine/engine/src/ecs/functions/ComponentFunctions'
+import { PostProcessingComponent } from '@etherealengine/engine/src/scene/components/PostProcessingComponent'
+import { Template } from './utils/template'
+
+export default function PostProcessing() {
+  const entity = useHookstate<Entity | null>(null)
+  const sceneLoaded = useHookstate(getMutableState(EngineState).sceneLoaded)
+
+  useEffect(() => {
+    entity.set(SceneState.getRootEntity())
+    EditorControlFunctions.modifyProperty = (entities, component, properties) => {
+      setComponent(entity.value!, PostProcessingComponent, properties)
+    }
+    getMutableState(SelectionState).selectedEntities.set([entity.value!])
+  }, [sceneLoaded])
+
+  return (
+    <>
+      <Template sceneName="sky-station" />
+      <LocationIcons />
+      <div
+        style={{
+          pointerEvents: 'all',
+          position: 'absolute',
+          top: '10%',
+          left: '70%',
+          background: 'white',
+          overflowY: 'auto',
+          height: '80%'
+        }}
+      >
+        {entity.value && <PostProcessingSettingsEditor entity={entity.value} component={PostProcessingComponent} />}
+      </div>
+    </>
+  )
+}