Add desynchronize_mapblock_texture_animation setting and improve minetest.conf.example a bit

minetest.conf.example

@@ -52,7 +52,8 @@
 # Some (temporary) keys for debugging
 #keymap_print_debug_stacks = KEY_KEY_P
 
-# The desired FPS
+# Minimum FPS
+# The amount of rendered stuff is dynamically set according to this
 #wanted_fps = 30
 # If FPS would go higher than this, limit it by sleeping
 # (to not waste CPU power for no benefit)
@@ -117,6 +118,8 @@
 # Sound settings
 #enable_sound = true
 #sound_volume = 0.7
+# Whether node texture animations should be desynchronized per MapBlock
+#desynchronize_mapblock_texture_animation = true
 
 #
 # Server stuff
@@ -144,8 +147,9 @@
 #give_initial_stuff = false
 # New users need to input this password
 #default_password = 
-# Available privileges: build, teleport, settime, privs, shout
-#default_privs = build, shout
+# Available privileges: interact, shout, teleport, settime, privs, ...
+# See /privs in game for a full list on your server and mod configuration.
+#default_privs = interact, shout
 # Whether players are shown to clients without any range limit
 #unlimited_player_transfer_distance = true
 # Whether to enable players killing each other

src/defaultsettings.cpp

@@ -103,6 +103,7 @@ void set_default_settings(Settings *settings)
 	settings->setDefault("console_alpha", "200");
 	settings->setDefault("enable_sound", "true");
 	settings->setDefault("sound_volume", "0.8");
+	settings->setDefault("desynchronize_mapblock_texture_animation", "true");
 
 	// Server stuff
 	// "map-dir" doesn't exist by default.

src/mapblock_mesh.cpp

@@ -28,6 +28,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "mesh.h"
 #include "content_mapblock.h"
 #include "noise.h"
+#include "settings.h"
 
 /*
 	MeshMakeData
@@ -996,10 +997,15 @@ MapBlockMesh::MapBlockMesh(MeshMakeData *data):
 			// Add to MapBlockMesh in order to animate these tiles
 			m_animation_tiles[i] = p.tile;
 			m_animation_frames[i] = 0;
-			// Get starting position from noise
-			m_animation_frame_offsets[i] = 100000 * (2.0 + noise3d(
-					data->m_blockpos.X, data->m_blockpos.Y,
-					data->m_blockpos.Z, 0));
+			if(g_settings->getBool("desynchronize_mapblock_texture_animation")){
+				// Get starting position from noise
+				m_animation_frame_offsets[i] = 100000 * (2.0 + noise3d(
+						data->m_blockpos.X, data->m_blockpos.Y,
+						data->m_blockpos.Z, 0));
+			} else {
+				// Play all synchronized
+				m_animation_frame_offsets[i] = 0;
+			}
 			// Replace tile texture with the first animation frame
 			std::ostringstream os(std::ios::binary);
 			os<<tsrc->getTextureName(p.tile.texture.id);