# Input System

Input system is responsible for processing user inputs for active entities.

# touch Callback

System loops through all input events happened in current update cycle. For each input event, system loops through all active entities sequentially based on their touch callback order. For each entity touch callback is executed.

# Remarks

Due to the sequential nature of input system, it is recommended to reduce workload in touch callback to increase performance. For example, use a single dedicated entity to process input events instead, and process its result from updateParallel callback.