message: improve CoC computation comment
diff: @@ -862,13 +862,13 @@ FrameGraphId<FrameGraphTexture> PostProcessManager::dof(FrameGraph& fg,
  * 1/d is computed from the depth buffer value as:
  * (note: our z-buffer is encoded as reversed-z, so we use 1-z below)
  *
  - * screen-space -> clip-space -> view-space
  + * screen-space -> clip-space -> view-space -> distance (x-1)
  *
  * v_s = { x, y, 1 - z, 1 } // screen space (reversed-z)
  * v_c = 2 * v_s - 1 // clip space
  * v = inverse(projection) * v_c // view space
  - * d = v.z / v.w // view space depth
  - * 1/d = v.w / v.z
  + * d = -v.z / v.w // view space distance to camera
  + * 1/d = -v.w / v.z
  *
  * Assuming a generic projection matrix of the form:
  *
  