Update instructions and Rerun version

Author: emilk

CMakeLists.txt

@@ -9,7 +9,7 @@ if(NOT DEFINED CMAKE_CXX_STANDARD)
 endif()
 
 include(FetchContent)
-FetchContent_Declare(rerun_sdk URL https://build.rerun.io/commit/f3a5ae2/rerun_cpp_sdk.zip)
+FetchContent_Declare(rerun_sdk URL https://build.rerun.io/commit/a8bb2f1/rerun_cpp_sdk.zip) # 2023-10-20
 FetchContent_MakeAvailable(rerun_sdk)
 
 find_package(Eigen3 REQUIRED)

README.md

@@ -2,13 +2,30 @@
 
 This is a minimal CMake project that shows how to use [Rerun](https://github.com/rerun-io/rerun) in your code in conjunction with [Eigen](https://eigen.tuxfamily.org/) and [OpenCV](https://opencv.org/).
 
-## How to build and run
+## Installing the Rerun viewer
+The Rerun C++ SDK works by connecting to an awaiting Rerun Viewer over TCP.
+
+#### Building from source
+* [Install `cargo`](https://rustup.rs/)
+* `cargo install rerun-cli`
+
+#### Using `pip`
+* `pip install rerun-sdk`
+
+### Running the Rerun viewer
+Just type `rerun` and the rerun viewer should show up. Then it is time to run this example!
+
+
+## Run this example
 
 ### Using `pixi`
-The easiest way to get started is to install [pixi](https://prefix.dev/docs/pixi/overview) and then run: `pixi run run`.
+The easiest way to get started is to install [pixi](https://prefix.dev/docs/pixi/overview).
 
-### Manually
+* Start the rerun viewer with `rerun` (see above)
+* Run the example with `rerun run run`
 
+
+### Manually
 First install the required dependencies:
 * `arrow-cpp`` (required by Rerun)
 * `eigen` and `opencv` (required by this example)