WriteAPI

A tool that provides an API for external programs to modify the location of the spectator camera in Echo VR.

How It Works

WriteAPI works by directly writing values to Echo's memory using memory.dll. The offsets for the multi-level pointers used are stored in the config.json file.

Usage

This program does nothing on its own, but instead provides a way for other programs to easily modify the in game camera.

For camera writing to work, Echo must be in "Free Cam" mode, activated by pressing c while in the 2d spectator view.

The camera transform consists of a vector for position and a quaternion for rotation. The position (0,0,0) is the middle of the arena, with +Y being up and +Z being towards the orange goal. The rotation (0,0,0,1) points towards the orange goal, in the +Z direction.

In order to update the camera transform, send a POST request to 127.0.0.1:6723 with a json body following the following format:

{
	"position": {
		"X":0.0,
		"Y":5.68,
		"Z":29
	},
	"rotation": {
		"X":0.0,
		"Y":-0.98,
		"Z":0.18,
		"W":0.0
	}
}

In order to get the camera transform, send a GET request to 127.0.0.1:6723. The response will be json in the same format as the above.

Development

Run with --noupdateconfig to use a modified local config without fetching one from the internet.

Sample Project

The repository includes a sample project that makes use of the API to move the camera. It is a .NET Core WPF project that interpolates the camera over a user defined path.

Disclaimer