pub fn directional_light_data(
lights: &[DirectionalLight],
) -> ([DirectionalLightData; 4], i32)Expand description
The LightUniforms directional slots and their count for lights, padded
with zeroed entries. Shared by the init-time build below and the live
crate::backend::RenderBackend::update_directional_lights seam, so a sun
edited at runtime packs exactly as a relaunch would pack it.