From 0a9b10725a8be343f8ec413f783b2d420bbeafd5 Mon Sep 17 00:00:00 2001
From: aozhiwei <aozhiwei@kingsome.cn>
Date: Mon, 15 May 2023 11:30:42 +0800
Subject: [PATCH] 1

---
 server/gameserver/mapinstance.cc | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/server/gameserver/mapinstance.cc b/server/gameserver/mapinstance.cc
index e7b7b9fc..3dac2f6c 100644
--- a/server/gameserver/mapinstance.cc
+++ b/server/gameserver/mapinstance.cc
@@ -1137,8 +1137,8 @@ void MapInstance::AdjustOnLandPoint(glm::vec3& point)
 
     glm::vec3 orig;
     glm::vec3 dir;
-    glm::vec2 bary_position;
-    float distance;
+    const dtPoly* nearest_poly = nullptr;
+    float nearest_distance = 0.0f;
 
     for (int i = 0; i < poly_count; ++i) {
         unsigned int slat = 0;
@@ -1162,6 +1162,10 @@ void MapInstance::AdjustOnLandPoint(glm::vec3& point)
             glm::vec3 v0 = glm::vec3(va[0], va[1], va[2]);
             glm::vec3 v1 = glm::vec3(vb[0], vb[1], vb[2]);
             glm::vec3 v2 = glm::vec3(vc[0], vc[1], vc[2]);
+
+            glm::vec2 bary_position;
+            float distance;
+
             bool hit = glm::intersectRayTriangle
                 (orig,
                  dir,
@@ -1171,7 +1175,21 @@ void MapInstance::AdjustOnLandPoint(glm::vec3& point)
                  bary_position,
                  distance
                  );
-
-        }
+            if (hit && distance > 0.00001f) {
+                if (nearest_poly) {
+                    if (distance < nearest_distance) {
+                        nearest_poly = poly;
+                        nearest_distance = distance;
+                    }
+                } else {
+                    nearest_poly = poly;
+                    nearest_distance = distance;
+                }
+            }
+        }//end for ii
+    }//end for i;
+    if (!nearest_poly) {
+        return;
     }
+    glm::vec3 nearest_pt = orig + dir * nearest_distance;
 }