Merge branch 'bug-hunting'

The trigger system has been fully implemented, as well as a few other
tweaks as the occasional thought came to mind.

Multiple rooms are now fully functional, mostly as a way to test the
triggers. Although there are still no real generation algorithms, a
utility for creating door pairs between given rooms is included in the
scripts directory.

Other changes in this merge include:

* Network updates via lua
* Entity types can be determined in lua
* Database columns are now order independant

It should be noted that only two types of userdata will work as far as
entity names are concerned: Characters and Monsters. I tried getting it to
work for all objects passed to lua, but it proved to be too obtuse.

In theory, I could create a teleport puzzle using what I've written here.
That might be a side project, or a way to test saving & loading systems. I
don't see any reason to delay monsters any longer; hopefully, I can get
them going soon too.

README.md

@@ -1,6 +1,6 @@
 ## Outline
 
-Tortuga is a 2D multiplayer JRPG featuring permadeath, with an emphasis on multiplayer cooperation, exploration and customization. The game runs on customizable public and private servers.
+Tortuga is a 2D MMORPG featuring permadeath, with an emphasis on multiplayer cooperation, exploration and customization. The game runs on customizable public and private servers.
 
 This game is inspired by classic 2D RPGs (Final Fantasy, The Legend of Zelda), as well as more modern sandboxes amd MMOs (Minecraft, EVE Online). This project is currently independently created and funded, with the goal of creating a game that will engage the players and inspire a large community.
 

client/gameplay_scenes/world_logic.cpp

@@ -125,8 +125,16 @@ void World::Update() {
 		it.second.Update();
 	}
 
+	try {
 		//update the map
 		UpdateMap();
+	}
+	catch(terminal_error& e) {
+		throw(e);
+	}
+	catch(std::exception& e) {
+		std::cerr << "UpdateMap Error: " << e.what() << std::endl;
+	}
 
 	//skip the rest without a local character
 	if (!localCharacter) {
@@ -162,6 +170,11 @@ 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

@@ -23,6 +23,24 @@
 
 #include "channels.hpp"
 
+#include <sstream>
+
+//-------------------------
+//static functions
+//-------------------------
+
+static int regionChecksum(Region* const region) {
+	int sum = 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++) {
+				sum += region->GetTile(i, j, k);
+			}
+		}
+	}
+	return sum;
+}
+
 //-------------------------
 //map management
 //-------------------------
@@ -40,6 +58,13 @@ void World::SendRegionRequest(int roomIndex, int x, int y) {
 }
 
 void World::hRegionContent(RegionPacket* const argPacket) {
+	//checksum
+	if (regionChecksum(argPacket->region) == 0) {
+		std::ostringstream msg;
+		msg << "Received region checksum failed: " << argPacket->x << ", " << argPacket->y;
+		throw(std::runtime_error(msg.str()));
+	}
+
 	//replace existing regions
 	regionPager.UnloadIf([&](Region const& region) -> bool {
 		return region.GetX() == argPacket->x && region.GetY() == argPacket->y;
@@ -71,9 +96,23 @@ void World::UpdateMap() {
 	//request empty regions within this zone
 	for (int i = xStart; i <= xEnd; i += REGION_WIDTH) {
 		for (int j = yStart; j <= yEnd; j += REGION_HEIGHT) {
-			if (!regionPager.FindRegion(i, j)) {
+			Region* region = regionPager.FindRegion(i, j);
+			if (!region) {
+				//request absent region
 				SendRegionRequest(roomIndex, i, j);
 			}
+			else if (regionChecksum(region) == 0) {
+				//checksum failed
+				//NOTE: this patches bug #45, but does not resolve it
+				regionPager.UnloadIf([region](Region const& ref) -> bool {
+					//remove the erroneous region
+					return region == &ref;
+				});
+				SendRegionRequest(roomIndex, i, j);
+				std::ostringstream msg;
+				msg << "Existing region checksum failed: " << roomIndex << ", " << i << ", " << j;
+				throw(std::runtime_error(msg.str()));
+			}
 		}
 	}
 }

common/map/region_pager_base.cpp

@@ -70,6 +70,7 @@ Region* RegionPagerBase::FindRegion(int x, int y) {
 }
 
 Region* RegionPagerBase::PushRegion(Region* const ptr) {
+	//BUG: #45 Some regions are occasionally losing their tile data
 	regionList.push_front(*ptr);
 	return &regionList.front();
 }

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")

server/rooms/room_data.cpp

@@ -26,6 +26,7 @@
 #include <stack>
 #include <stdexcept>
 
+//TODO: (9) character collisions should be preformed client-side
 void RoomData::RunFrame() {
 	//get the hook
 	lua_rawgeti(lua, LUA_REGISTRYINDEX, tickRef);