Determining local shared origins in three-dimensional environments within multi-user communication sessions

A first electronic device comprising:

• one or more processors;
• memory;
• and
• one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing a method comprising:
• detecting an indication of a request to engage in a shared activity with a second electronic device and a third electronic device, wherein the first electronic device is collocated with the second electronic device and the third electronic device in a physical environment, and wherein the first electronic device and the second electronic device share a first origin in the physical environment according to which content is presented in a three-dimensional environment;
• and
• in response to detecting the indication, entering a communication session that includes the first electronic device, the second electronic device, and the third electronic device, including:
• obtaining first data corresponding to a second origin in the physical environment, wherein the second origin is shared between the second electronic device and the third electronic device;
• determining a shared origin in the physical environment using the first data and second data corresponding to the first origin in the physical environment;
• and
• presenting, via one or more displays, an object corresponding to the shared activity at a first location in the three-dimensional environment relative to the shared origin.

A non-transitory computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by one or more processors of a first electronic device, cause the first electronic device to perform a method comprising:

• detecting an indication of a request to engage in a shared activity with a second electronic device and a third electronic device, wherein the first electronic device is collocated with the second electronic device and the third electronic device in a physical environment, and wherein the first electronic device and the second electronic device share a first origin in the physical environment according to which content is presented in a three-dimensional environment;
• and
• in response to detecting the indication, entering a communication session that includes the first electronic device, the second electronic device, and the third electronic device, including:
• obtaining first data corresponding to a second origin in the physical environment, wherein the second origin is shared between the second electronic device and the third electronic device;
• determining a shared origin in the physical environment using the first data and second data corresponding to the first origin in the physical environment;
• and
• presenting, via one or more displays, an object corresponding to the shared activity at a first location in the three-dimensional environment relative to the shared origin.