From b62d06a5f7409b05b221824b3132cd97e1e4546f Mon Sep 17 00:00:00 2001
From: XProger <xproger@list.ru>
Date: Sun, 11 Mar 2018 08:33:46 +0300
Subject: [PATCH] #23 select optimal water reflection plane

---
 src/cache.h | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/cache.h b/src/cache.h
index 2f544e5..5bd245b 100644
--- a/src/cache.h
+++ b/src/cache.h
@@ -805,16 +805,23 @@ struct WaterCache {
 
         if (roomsCount) {
         // select optimal water plane
-            float waterLevel = -INF;
+            float waterDist  = 10000000.0f;
+            int   waterItem = 0;
 
             for (int i = 0; i < count; i++) {
                 Item &item = items[i];
                 if (!item.visible) continue;
 
-                if (item.pos.y > waterLevel)
-                    waterLevel = item.pos.y;
+                float d = fabsf(item.pos.y - camera->eye.pos.y);
+
+                if (d < waterDist) {
+                    waterDist = d;
+                    waterItem = i;
+                }
             }
 
+            float waterLevel = items[waterItem].pos.y;
+
             reflectPlane = vec4(0, 1, 0, -waterLevel);
             camera->reflectPlane = &reflectPlane;
             camera->setup(true);