`Input.get_last_mouse_screen_velocity` returns offset from program start (roughly), not velocity

[bernhardbarker]

Tested versions

Reproducible in: 4.3.stable, 4.4.stable, 4.5.beta1

System information

Godot v4.5.beta1 - Windows 11 (build 26100) - Multi-window, 1 monitor - OpenGL 3 (Compatibility) - NVIDIA GeForce RTX 3080 Laptop GPU (NVIDIA; 31.0.15.5186) - AMD Ryzen 7 5800H with Radeon Graphics (16 threads) - 15.35 GiB memory

Issue description

When calling Input.get_last_mouse_screen_velocity in _physics_process, it seems to return the difference between the current mouse position and the mouse position when the program started (roughly - when not moving the mouse, the returned value is not zero and it also jumps around). It doesn't return the velocity.

Input.get_last_mouse_velocity() works correctly.

Steps to reproduce

Run the example project. Move the mouse. See that the mouse screen velocity showing in the label is wrong.

Minimal reproduction project (MRP)

project.zip

[Rindbee]

godot/core/input/input.cpp

Lines 253 to 256 in 9a39760

	velocity = accum / accum_t;
	screen_velocity = screen_accum / accum_t;
	accum = Vector2();
	accum_t = 0;

screen_accum seems to forget to reset.