Function inv_proj_for

native/shared/src/renderer/planar_reflection.rs:183–185

Recompute `inv_proj` from a possibly-modified projection. After the EN-011 V2 `oblique_proj` rewrite, the reflection pass uses a near- plane-clipped projection that differs from the main camera's, so the inverse needs to be recomputed for any view-space reconstruction downstream (SSR, deferred unprojection).

(proj: [[f32; 4]; 4])

/// the inverse needs to be recomputed for any view-space reconstruction
/// downstream (SSR, deferred unprojection).
pub fn inv_proj_for(proj: [[f32; 4]; 4]) -> [[f32; 4]; 4] {
    mat4_invert(proj)
}

/// Transform a world-space plane `(Nx, Ny, Nz, d)` (such that
/// `N · p + d = 0` for points on the plane) into eye / view space