# Interactions with environment ### OnStartHandler It invokes OnStart event and tries to Invoke View\.Handle() after server responded with world data, i.e. right before player start seeing other players. ### OnTriggerHandler It works exactly as Unity3D Trigger Events. ### OnClickHandler It works exactly as Unity3D EventSystem. In addition to this you may want to call OnClickHandler.ReplaceCursor(true/false) OnPointerEnter and OnPointerExit to provide better visual feedback when player hovers on it. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://outreal-xr.gitbook.io/holofair-sdk/development/interactions-with-environment.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.