# Fundamentals

## Articles in This Section

- [Programming Overview](../../code/fundamentals/programming_overview/index.md)

- [Engine Architecture](../../code/fundamentals/engine_architecture/index.md)

- [Execution Sequence](../../code/fundamentals/execution_sequence/index.md)

  - [Application Logic System](../../code/fundamentals/execution_sequence/app_logic_system.md)
  - [Engine Initialization](../../code/fundamentals/execution_sequence/init.md)
  - [Engine Main Loop](../../code/fundamentals/execution_sequence/main_loop.md)
  - [Engine Shutdown](../../code/fundamentals/execution_sequence/shutdown.md)

- [Where to Put Your Code](../../code/fundamentals/execution_sequence/code_update.md)

- [Working with Smart Pointers](../../code/fundamentals/smartpointers.md)

- [Accessing Nodes and Files via Properties](../../code/fundamentals/file_access/index.md)

- [Thread System in UNIGINE](../../code/fundamentals/thread_system/index.md)

- [Thread Safety](../../code/fundamentals/thread_safety/index.md)

- [Matrix Transformations (CS)](../../code/fundamentals/matrix_transformations/index_cs.md)

- [Matrix Transformations (CPP)](../../code/fundamentals/matrix_transformations/index_cpp.md)

- [Matrix Transformations (USC)](../../code/fundamentals/matrix_transformations/index_usc.md)

- [Camera Matrices](../../code/fundamentals/matrices/index.md)

- [Event Handling (CS)](../../code/fundamentals/events/index_cs.md)

- [Event Handling (CPP)](../../code/fundamentals/events/index_cpp.md)

- [Event Handling Callbacks (USC)](../../code/fundamentals/callbacks/index_usc.md)

- [Event Handling Callbacks (CS)](../../code/fundamentals/callbacks/index_cs.md)

- [Event Handling Callbacks (CPP)](../../code/fundamentals/callbacks/index_cpp.md)