ImGuiImplGlfwNewFrame

ImGuiImplGlfwNewFrame is a function within the Dear ImGui library, specifically designed for integration with the GLFW windowing toolkit. Its primary purpose is to prepare Dear ImGui for the rendering of a new frame when using GLFW as the backend. This involves processing input events captured by GLFW and translating them into a format that Dear ImGui can understand and utilize for its immediate-mode graphical user interface elements.

When ImGuiImplGlfwNewFrame is called, it typically polls for window events such as keyboard presses, mouse movements, button clicks, and scroll wheel actions. It then updates the internal state of Dear ImGui to reflect these events. This ensures that any interactive widgets like buttons, sliders, or input fields respond correctly to user input within the current frame. The function also handles window resizing and focus changes, ensuring that the GUI adapts appropriately.

Properly calling ImGuiImplGlfwNewFrame at the beginning of each frame loop, after GLFW has polled its events but before any ImGui drawing commands are issued, is crucial for the correct functioning of Dear ImGui with GLFW. Failure to do so can result in unresponsive UI elements or incorrect input handling. It acts as the bridge between the low-level windowing system provided by GLFW and the high-level GUI toolkit of Dear ImGui.