pub fn rect_pt(
centre_mm: [f64; 2],
half_mm: [f64; 2],
page_height_mm: f64,
) -> [f64; 4]Expand description
A 3D annotation’s rectangle in PDF points: centred on centre_mm (sheet
millimetres from the top-left), half_mm either way, on a page
page_height_mm tall.