From 651e7ca827017d574a960c1a4e08b7112e451bb4 Mon Sep 17 00:00:00 2001
From: Eric Wasylishen <ewasylishen@gmail.com>
Date: Thu, 11 Feb 2016 23:30:21 -0700
Subject: [PATCH] CalcPoints: if NearWall() fails, first try fudging by 0.25
 units in each direction

---
 light/ltface.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/light/ltface.c b/light/ltface.c
index f4d3d842..05bfe9dc 100644
--- a/light/ltface.c
+++ b/light/ltface.c
@@ -523,6 +523,21 @@ CalcPoints(const dmodel_t *model, const vec3_t offset, const texorg_t *texorg, l
             if (!NearWall(point))
                 continue; // all good
             
+            // First try fudging by 0.25
+            bool good = false;
+            for (i = 0; i < 6; i++) {
+                vec3_t testpoint;
+                VectorCopy(point, testpoint);
+                testpoint[i/2] += (i%2) ? 0.25 : -0.25;
+                if (!NearWall(testpoint)) {
+                    VectorCopy(testpoint, point);
+                    good = true;
+                }
+            }
+            if (good)
+                continue;
+            
+            // Next try a trace
             for (i = 0; i < 6; i++) {
                 const int flags = TRACE_HIT_SOLID;
                 tracepoint_t hit;