Fixed liquid mesh generation

diff --git a/src/content_mapblock.cpp b/src/content_mapblock.cpp
index ab5cc1b54975f6d180d36a5d145505506a99e507..c0845ec57d5e52fb7ec6f77287c05bd482702233 100644 (file)
--- a/src/content_mapblock.cpp
+++ b/src/content_mapblock.cpp
@@ -386,8 +386,8 @@ void mapblock_mesh_generate_special(MeshMakeData *data,
                                        if(n2.getContent() == c_source)
                                                level = (-0.5+node_liquid_level) * BS;
                                        else if(n2.getContent() == c_flowing)
-                                               level = (-0.5 + ((float)n2.param2 + 0.5) / 8.0
-                                                               * node_liquid_level) * BS;
+                                               level = (-0.5 + ((float)(n2.param2&LIQUID_LEVEL_MASK)
+                                                               + 0.5) / 8.0 * node_liquid_level) * BS;
 
                                        // Check node above neighbor.
                                        // NOTE: This doesn't get executed if neighbor
@@ -404,9 +404,6 @@ void mapblock_mesh_generate_special(MeshMakeData *data,
                                neighbor_flags.insert(neighbor_dirs[i], flags);
                        }
 
-                       //float liquid_level = (-0.5 + ((float)n.param2 + 0.5) / 8.0) * BS;
-                       //float liquid_level = neighbor_levels[v3s16(0,0,0)];
-
                        // Corner heights (average between four liquids)
                        f32 corner_levels[4];
                        
@@ -421,29 +418,46 @@ void mapblock_mesh_generate_special(MeshMakeData *data,
                                v3s16 cornerdir = halfdirs[i];
                                float cornerlevel = 0;
                                u32 valid_count = 0;
+                               u32 air_count = 0;
                                for(u32 j=0; j<4; j++)
                                {
                                        v3s16 neighbordir = cornerdir - halfdirs[j];
                                        u8 content = neighbor_contents[neighbordir];
-                                       // Special case for source nodes
-                                       if(content == c_source)
+                                       // If top is liquid, draw starting from top of node
+                                       if(neighbor_flags[neighbordir] &
+                                                       neighborflag_top_is_same_liquid)
+                                       {
+                                               cornerlevel = 0.5*BS;
+                                               valid_count = 1;
+                                               break;
+                                       }
+                                       // Source is always the same height
+                                       else if(content == c_source)
                                        {
                                                cornerlevel = (-0.5+node_liquid_level)*BS;
                                                valid_count = 1;
                                                break;
                                        }
+                                       // Flowing liquid has level information
                                        else if(content == c_flowing)
                                        {
                                                cornerlevel += neighbor_levels[neighbordir];
                                                valid_count++;
                                        }
                                        else if(content == CONTENT_AIR)
+                                       {
+                                               air_count++;
+                                       }
+                                       /*// Air is liquid level 0
+                                       else if(content == CONTENT_AIR)
                                        {
                                                cornerlevel += -0.5*BS;
                                                valid_count++;
-                                       }
+                                       }*/
                                }
-                               if(valid_count > 0)
+                               if(air_count >= 2)
+                                       cornerlevel = -0.5*BS;
+                               else if(valid_count > 0)
                                        cornerlevel /= valid_count;
                                corner_levels[i] = cornerlevel;
                        }