From 5db4b447a6a9270150678a2a053125696512a3ac Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Sat, 26 Nov 2022 16:52:55 +0100
Subject: [PATCH] rplight: Fix PSSM calculation failing with infinite far
 distance

Fixes #1397
---
 contrib/src/rplight/pssmCameraRig.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/contrib/src/rplight/pssmCameraRig.cxx b/contrib/src/rplight/pssmCameraRig.cxx
index 7bbbd0df6e..410ded4c83 100644
--- a/contrib/src/rplight/pssmCameraRig.cxx
+++ b/contrib/src/rplight/pssmCameraRig.cxx
@@ -400,7 +400,8 @@ void PSSMCameraRig::update(NodePath cam_node, const LVecBase3 &light_vector) {
   }
 
   // Do the actual PSSM
-  compute_pssm_splits( transform, _pssm_distance / lens->get_far(), light_vector );
+  double far_recip = std::max(1.0 / (double)lens->get_far(), (double)lens_far_limit);
+  compute_pssm_splits( transform, _pssm_distance * far_recip, light_vector );
 
   _update_collector.stop();
 }