1

server/gameserver/mapinstance.cc

@@ -577,7 +577,10 @@ void MapInstance::MarkMapAreaPolys()
             for (int ii = 0; ii < poly->vertCount; ++ii) {
                 const float* vc = &tile->verts[poly->verts[ii]*3];
                 grass_pos_hash_.push_back
-                    (glm::vec3(vc[0], vc[1], vc[2]));
+                    (glm::vec3(vc[0] / GetMapMeta()->scale(),
+                               vc[1],
+                               vc[2] / GetMapMeta()->scale()
+                               ));
             }
         }
         poly_ext_datas_.push_back(ext_flag);
@@ -1085,3 +1088,21 @@ bool MapInstance::SceneRaycast(const glm::vec3& orig,
     }
     return result;
 }
+
+bool MapInstance::GetNearestGrass(const glm::vec3& center, glm::vec3& out_pt)
+{
+    float nearest_distance = FLT_MAX;
+    glm::vec3* nearest_pt = nullptr;
+    for (auto& pt : grass_pos_hash_) {
+        float distance = std::fabs(pt.x - center.x) + std::fabs(pt.z - center.z);
+        if (distance < nearest_distance) {
+            nearest_distance = distance;
+            nearest_pt = & pt;
+        }
+    }
+    if (nearest_pt) {
+        out_pt = *nearest_pt;
+        return true;
+    }
+    return false;
+}

server/gameserver/mapinstance.h

@@ -57,6 +57,7 @@ class MapInstance : public std::enable_shared_from_this<MapInstance>
     bool PtInHouse(const glm::vec3& pt, glm::vec3& nearest_pt);
     bool SceneRaycast(const glm::vec3& orig, const glm::vec3& dir, float max_distance,
                       glm::vec3& hit_pos, float& ray_length);
+    bool GetNearestGrass(const glm::vec3& center, glm::vec3& out_pt);
 
  private:
     void LoadHouse();