Hunting a strange networking bug

client/gameplay_scenes/world_logic.cpp

@@ -152,7 +152,7 @@ void World::FrameEnd() {
 }
 
 void World::RenderFrame() {
-//	SDL_FillRect(GetScreen(), 0, 0);
+	SDL_FillRect(GetScreen(), 0, 0);
 	Render(GetScreen());
 	SDL_Flip(GetScreen());
 	fps.Calculate();
@@ -162,6 +162,11 @@ void World::Render(SDL_Surface* const screen) {
 	//draw the map
 	for (std::list<Region>::iterator it = regionPager.GetContainer()->begin(); it != regionPager.GetContainer()->end(); it++) {
 		tileSheet.DrawRegionTo(screen, &(*it), camera.x, camera.y);
+
+		//debugging
+		std::ostringstream msg;
+		msg << it->GetX() << ", " << it->GetY();
+		font.DrawStringTo(msg.str(), screen, it->GetX() * tileSheet.GetImage()->GetClipW() - camera.x, it->GetY() * tileSheet.GetImage()->GetClipH() - camera.y);
 	}
 
 	//draw the entities

client/gameplay_scenes/world_map.cpp

@@ -23,11 +23,16 @@
 
 #include "channels.hpp"
 
+#include <iostream>
+
 //-------------------------
 //map management
 //-------------------------
 
 void World::SendRegionRequest(int roomIndex, int x, int y) {
+	//debugging
+//	std::cout << "SendRegionRequest(" << roomIndex << ", " << x << ", " << y << ")" << std::endl;
+
 	RegionPacket packet;
 
 	//pack the region's data
@@ -40,6 +45,23 @@ void World::SendRegionRequest(int roomIndex, int x, int y) {
 }
 
 void World::hRegionContent(RegionPacket* const argPacket) {
+	//debugging
+	std::cout << "hRegionContent(" << roomIndex << ", " << argPacket->x << ", " << argPacket->y << ")" << std::endl;
+
+	//checksum
+	int checksum = 0;
+	for(int i = 0; i < REGION_WIDTH; i++) {
+		for (int j = 0; j < REGION_HEIGHT; j++) {
+			for (int k = 0; k < REGION_DEPTH; k++) {
+				checksum += argPacket->region->GetTile(i, j, k);
+			}
+		}
+	}
+
+	if (checksum == 0) {
+		std::cout << "Received checksum failed: " << argPacket->x << ", " << argPacket->y << std::endl;
+	}
+
 	//replace existing regions
 	regionPager.UnloadIf([&](Region const& region) -> bool {
 		return region.GetX() == argPacket->x && region.GetY() == argPacket->y;
@@ -74,6 +96,22 @@ void World::UpdateMap() {
 			if (!regionPager.FindRegion(i, j)) {
 				SendRegionRequest(roomIndex, i, j);
 			}
+			else {
+				Region* region = regionPager.FindRegion(i, j);
+
+				int checksum = 0;
+				for(int x = 0; x < REGION_WIDTH; x++) {
+					for (int y = 0; y < REGION_HEIGHT; y++) {
+						for (int z = 0; z < REGION_DEPTH; z++) {
+							checksum += region->GetTile(x, y, z);
+						}
+					}
+				}
+
+				if (checksum == 0) {
+					std::cout << "Existing checksum failed: " << roomIndex << ", " << i << ", " << j << std::endl;
+				}
+			}
 		}
 	}
 }

rsc/scripts/map_maker.lua

@@ -65,6 +65,9 @@ end
 
 --custom generation systems here
 function mapMaker.DebugIsland(r)
+	--debug
+	io.write("map_maker:DebugIsland(", regionAPI.GetX(r), ", ", regionAPI.GetY(r), ")\n")
+
 	--basic distance check for each tile, placing an island around the world origin
 	for i = 1, regionAPI.GetWidth(r) do
 		for j = 1, regionAPI.GetHeight(r) do
@@ -95,6 +98,9 @@ function mapMaker.DebugIsland(r)
 end
 
 function mapMaker.DebugGrassland(r)
+	--debug
+	io.write("map_maker:DebugGrassland(", regionAPI.GetX(r), ", ", regionAPI.GetY(r), ")\n")
+
 	--all dirt
 	for i = 1, regionAPI.GetWidth(r) do
 		for j = 1, regionAPI.GetHeight(r) do

rsc/scripts/map_saver.lua

@@ -4,11 +4,11 @@ local mapSaver = {}
 
 function mapSaver.Load(r)
 	--empty
-	io.write("map_saver:Load(", region.GetX(r), ", ", region.GetY(r), ")\n")
+--	io.write("map_saver:Load(", region.GetX(r), ", ", region.GetY(r), ")\n")
 end
 function mapSaver.Save(r)
 	--empty
-	io.write("map_saver:Save(", region.GetX(r), ", ", region.GetY(r), ")\n")
+--	io.write("map_saver:Save(", region.GetX(r), ", ", region.GetY(r), ")\n")
 end
 
 --TODO: (3) create a flexible saving & loading system

rsc/scripts/setup_server.lua

@@ -31,6 +31,6 @@ local underworld, uidTwo = roomManagerAPI.CreateRoom("underworld", "overworld.bm
 roomAPI.Initialize(underworld, mapSaver.Load, mapSaver.Save, mapMaker.DebugGrassland, mapSaver.Save)
 
 --call the monstrosity
-doorUtility.createDoorPair("pair 1", overworld, 0, -64, underworld, 0, 0)
+doorUtility.createDoorPair("pair 1", overworld, -64, -64, underworld, -64, -64)
 
 print("Finished the lua script")