Convert cursor to world 2D coordinates with custom viewport physical position

[erictuvesson]

Page: Convert cursor to world coordinates - 2D games

The viewport_to_world and viewport_to_world_2d functions take in viewport_position which is not relative to the screen corner. To get the correct viewport_position it has to be adjusted to the viewport logical position.

I don't think this should replace the current code on the page, but it would be helpful to have something that points in this direction as well. When using a crate like bevy_pixel_camera which modifies the viewport position it's not very straightforward with physical and logical viewport positions.

Here is a code snippet that takes the viewport logical position into account:

if let Some(world_position) = window.cursor_position().and_then(|cursor| {
    if let Some(logical) = camera.logical_viewport_rect() {
        camera.viewport_to_world_2d(camera_transform, cursor - logical.min)
    } else {
        camera.viewport_to_world_2d(camera_transform, cursor)
    }
}) {
    // ...
}