Kayne Ruse
483 lines
14 KiB
C++
483 lines
14 KiB
C++
/* Copyright: (c) Kayne Ruse 2013
|
|
*
|
|
* This software is provided 'as-is', without any express or implied
|
|
* warranty. In no event will the authors be held liable for any damages
|
|
* arising from the use of this software.
|
|
*
|
|
* Permission is granted to anyone to use this software for any purpose,
|
|
* including commercial applications, and to alter it and redistribute it
|
|
* freely, subject to the following restrictions:
|
|
*
|
|
* 1. The origin of this software must not be misrepresented; you must not
|
|
* claim that you wrote the original software. If you use this software
|
|
* in a product, an acknowledgment in the product documentation would be
|
|
* appreciated but is not required.
|
|
*
|
|
* 2. Altered source versions must be plainly marked as such, and must not be
|
|
* misrepresented as being the original software.
|
|
*
|
|
* 3. This notice may not be removed or altered from any source
|
|
* distribution.
|
|
*/
|
|
#include "in_world.hpp"
|
|
|
|
#include "channels.hpp"
|
|
|
|
#include <algorithm>
|
|
#include <cmath>
|
|
#include <stdexcept>
|
|
|
|
//-------------------------
|
|
//Public access members
|
|
//-------------------------
|
|
|
|
InWorld::InWorld(ConfigUtility* const argConfig, UDPNetworkUtility* const argNetwork, int* const argClientIndex):
|
|
config(*argConfig),
|
|
network(*argNetwork),
|
|
clientIndex(*argClientIndex)
|
|
{
|
|
//setup the utility objects
|
|
buttonImage.LoadSurface(config["dir.interface"] + "button_menu.bmp");
|
|
buttonImage.SetClipH(buttonImage.GetClipH()/3);
|
|
font.LoadSurface(config["dir.fonts"] + "pk_white_8.bmp");
|
|
|
|
//pass the utility objects
|
|
disconnectButton.SetImage(&buttonImage);
|
|
disconnectButton.SetFont(&font);
|
|
shutDownButton.SetImage(&buttonImage);
|
|
shutDownButton.SetFont(&font);
|
|
|
|
//set the button positions
|
|
disconnectButton.SetX(50);
|
|
disconnectButton.SetY(50 + buttonImage.GetClipH() * 0);
|
|
shutDownButton.SetX(50);
|
|
shutDownButton.SetY(50 + buttonImage.GetClipH() * 1);
|
|
|
|
//set the button texts
|
|
disconnectButton.SetText("Disconnect");
|
|
shutDownButton.SetText("Shut Down");
|
|
|
|
//load the tilesheet
|
|
//TODO: add the tilesheet to the map system?
|
|
tileSheet.Load(config["dir.tilesets"] + "terrain.bmp", 12, 15);
|
|
|
|
//create the server-side player object
|
|
//TODO: the login system needs an overhaul
|
|
NetworkPacket packet;
|
|
packet.meta.type = NetworkPacket::Type::PLAYER_NEW;
|
|
packet.playerInfo.clientIndex = clientIndex;
|
|
snprintf(packet.playerInfo.handle, PACKET_STRING_SIZE, "%s", config["player.handle"].c_str());
|
|
snprintf(packet.playerInfo.avatar, PACKET_STRING_SIZE, "%s", config["player.avatar"].c_str());
|
|
packet.playerInfo.position = {0,0};
|
|
packet.playerInfo.motion = {0,0};
|
|
|
|
//send it
|
|
char buffer[PACKET_BUFFER_SIZE];
|
|
serialize(&packet, buffer);
|
|
network.Send(Channels::SERVER, buffer, PACKET_BUFFER_SIZE);
|
|
|
|
//request a sync
|
|
packet.meta.type = NetworkPacket::Type::SYNCHRONIZE;
|
|
serialize(&packet, buffer);
|
|
network.Send(Channels::SERVER, buffer, PACKET_BUFFER_SIZE);
|
|
|
|
//debug
|
|
// RequestRegion(0, 0);
|
|
}
|
|
|
|
InWorld::~InWorld() {
|
|
//
|
|
}
|
|
|
|
//-------------------------
|
|
//Frame loop
|
|
//-------------------------
|
|
|
|
void InWorld::FrameStart() {
|
|
//
|
|
}
|
|
|
|
void InWorld::Update(double delta) {
|
|
NetworkPacket packet;
|
|
|
|
//suck in all waiting packets
|
|
while(network.Receive()) {
|
|
deserialize(&packet, network.GetInData());
|
|
packet.meta.srcAddress = network.GetInPacket()->address;
|
|
HandlePacket(packet);
|
|
}
|
|
|
|
//update the characters
|
|
for (auto& it : playerCharacters) {
|
|
it.second.Update(delta);
|
|
}
|
|
//TODO: sort the players and entities by Y position
|
|
|
|
//update the camera
|
|
if(localCharacter) {
|
|
camera.x = localCharacter->GetPosition().x - camera.marginX;
|
|
camera.y = localCharacter->GetPosition().y - camera.marginY;
|
|
}
|
|
|
|
//check the map
|
|
UpdateMap();
|
|
}
|
|
|
|
void InWorld::FrameEnd() {
|
|
//
|
|
}
|
|
|
|
void InWorld::RenderFrame() {
|
|
// SDL_FillRect(GetScreen(), 0, 0);
|
|
Render(GetScreen());
|
|
SDL_Flip(GetScreen());
|
|
}
|
|
|
|
void InWorld::Render(SDL_Surface* const screen) {
|
|
//draw the map
|
|
//TODO: figure out something to fix the region container access
|
|
for (auto it = regionPager.GetContainer()->begin(); it != regionPager.GetContainer()->end(); it++) {
|
|
tileSheet.DrawRegionTo(screen, *it, camera.x, camera.y);
|
|
}
|
|
|
|
//draw characters
|
|
for (auto& it : playerCharacters) {
|
|
it.second.DrawTo(screen, camera.x, camera.y);
|
|
}
|
|
|
|
//draw UI
|
|
disconnectButton.DrawTo(screen);
|
|
shutDownButton.DrawTo(screen);
|
|
|
|
font.DrawStringTo(to_string_custom(fps.GetFrameRate()), screen, 0, 0);
|
|
|
|
fps.Calculate();
|
|
}
|
|
|
|
//-------------------------
|
|
//Event handlers
|
|
//-------------------------
|
|
|
|
void InWorld::QuitEvent() {
|
|
//exit the game AND the server
|
|
RequestDisconnect();
|
|
}
|
|
|
|
void InWorld::MouseMotion(SDL_MouseMotionEvent const& motion) {
|
|
disconnectButton.MouseMotion(motion);
|
|
shutDownButton.MouseMotion(motion);
|
|
}
|
|
|
|
void InWorld::MouseButtonDown(SDL_MouseButtonEvent const& button) {
|
|
disconnectButton.MouseButtonDown(button);
|
|
shutDownButton.MouseButtonDown(button);
|
|
}
|
|
|
|
void InWorld::MouseButtonUp(SDL_MouseButtonEvent const& button) {
|
|
if (disconnectButton.MouseButtonUp(button) == Button::State::HOVER) {
|
|
RequestDisconnect();
|
|
}
|
|
if (shutDownButton.MouseButtonUp(button) == Button::State::HOVER) {
|
|
RequestShutDown();
|
|
}
|
|
}
|
|
|
|
void InWorld::KeyDown(SDL_KeyboardEvent const& key) {
|
|
switch(key.keysym.sym) {
|
|
case SDLK_ESCAPE: {
|
|
QuitEvent();
|
|
}
|
|
break;
|
|
|
|
//player movement
|
|
case SDLK_LEFT:
|
|
if (localCharacter) {
|
|
localCharacter->AdjustDirection(PlayerCharacter::Direction::WEST);
|
|
SendState();
|
|
}
|
|
break;
|
|
|
|
case SDLK_RIGHT:
|
|
if (localCharacter) {
|
|
localCharacter->AdjustDirection(PlayerCharacter::Direction::EAST);
|
|
SendState();
|
|
}
|
|
break;
|
|
|
|
case SDLK_UP:
|
|
if (localCharacter) {
|
|
localCharacter->AdjustDirection(PlayerCharacter::Direction::NORTH);
|
|
SendState();
|
|
}
|
|
break;
|
|
|
|
case SDLK_DOWN:
|
|
if (localCharacter) {
|
|
localCharacter->AdjustDirection(PlayerCharacter::Direction::SOUTH);
|
|
SendState();
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
void InWorld::KeyUp(SDL_KeyboardEvent const& key) {
|
|
switch(key.keysym.sym) {
|
|
//player movement
|
|
case SDLK_LEFT:
|
|
if (localCharacter) {
|
|
localCharacter->AdjustDirection(PlayerCharacter::Direction::EAST);
|
|
SendState();
|
|
}
|
|
break;
|
|
|
|
case SDLK_RIGHT:
|
|
if (localCharacter) {
|
|
localCharacter->AdjustDirection(PlayerCharacter::Direction::WEST);
|
|
SendState();
|
|
}
|
|
break;
|
|
|
|
case SDLK_UP:
|
|
if (localCharacter) {
|
|
localCharacter->AdjustDirection(PlayerCharacter::Direction::SOUTH);
|
|
SendState();
|
|
}
|
|
break;
|
|
|
|
case SDLK_DOWN:
|
|
if (localCharacter) {
|
|
localCharacter->AdjustDirection(PlayerCharacter::Direction::NORTH);
|
|
SendState();
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
//-------------------------
|
|
//Network handlers
|
|
//-------------------------
|
|
|
|
void InWorld::HandlePacket(NetworkPacket packet) {
|
|
switch(packet.meta.type) {
|
|
case NetworkPacket::Type::DISCONNECT:
|
|
HandleDisconnect(packet);
|
|
break;
|
|
case NetworkPacket::Type::PLAYER_NEW:
|
|
HandlePlayerNew(packet);
|
|
break;
|
|
case NetworkPacket::Type::PLAYER_DELETE:
|
|
HandlePlayerDelete(packet);
|
|
break;
|
|
case NetworkPacket::Type::PLAYER_UPDATE:
|
|
HandlePlayerUpdate(packet);
|
|
break;
|
|
case NetworkPacket::Type::REGION_CONTENT:
|
|
HandleRegionContent(packet);
|
|
break;
|
|
//handle errors
|
|
default:
|
|
throw(std::runtime_error("Unknown NetworkPacket::Type encountered"));
|
|
break;
|
|
}
|
|
}
|
|
|
|
void InWorld::HandleDisconnect(NetworkPacket packet) {
|
|
network.Unbind(Channels::SERVER);
|
|
clientIndex = -1;
|
|
SetNextScene(SceneList::MAINMENU);
|
|
}
|
|
|
|
void InWorld::HandlePlayerNew(NetworkPacket packet) {
|
|
if (playerCharacters.find(packet.playerInfo.playerIndex) != playerCharacters.end()) {
|
|
throw(std::runtime_error("Cannot create duplicate players"));
|
|
}
|
|
|
|
playerCharacters[packet.playerInfo.playerIndex].GetSprite()->LoadSurface(config["dir.sprites"] + packet.playerInfo.avatar, 4, 4);
|
|
playerCharacters[packet.playerInfo.playerIndex].SetPosition(packet.playerInfo.position);
|
|
playerCharacters[packet.playerInfo.playerIndex].SetMotion(packet.playerInfo.motion);
|
|
playerCharacters[packet.playerInfo.playerIndex].ResetDirection();
|
|
|
|
//catch this client's player object
|
|
if (packet.playerInfo.clientIndex == clientIndex && !localCharacter) {
|
|
playerIndex = packet.playerInfo.playerIndex;
|
|
localCharacter = &playerCharacters[playerIndex];
|
|
//setup the camera
|
|
camera.width = GetScreen()->w;
|
|
camera.height = GetScreen()->h;
|
|
//center on the player's character
|
|
camera.marginX = (GetScreen()->w / 2 - localCharacter->GetSprite()->GetImage()->GetClipW() / 2);
|
|
camera.marginY = (GetScreen()->h / 2 - localCharacter->GetSprite()->GetImage()->GetClipH() / 2);
|
|
}
|
|
}
|
|
|
|
void InWorld::HandlePlayerDelete(NetworkPacket packet) {
|
|
if (playerCharacters.find(packet.playerInfo.playerIndex) == playerCharacters.end()) {
|
|
throw(std::runtime_error("Cannot delete non-existant players"));
|
|
}
|
|
|
|
playerCharacters.erase(packet.playerInfo.playerIndex);
|
|
|
|
//catch this client's player object
|
|
if (packet.playerInfo.clientIndex == clientIndex) {
|
|
playerIndex = -1;
|
|
localCharacter = nullptr;
|
|
}
|
|
}
|
|
|
|
void InWorld::HandlePlayerUpdate(NetworkPacket packet) {
|
|
if (playerCharacters.find(packet.playerInfo.playerIndex) == playerCharacters.end()) {
|
|
HandlePlayerNew(packet);
|
|
return;
|
|
}
|
|
|
|
//update only if the message didn't originate from here
|
|
if (packet.playerInfo.clientIndex != clientIndex) {
|
|
playerCharacters[packet.playerInfo.playerIndex].SetPosition(packet.playerInfo.position);
|
|
playerCharacters[packet.playerInfo.playerIndex].SetMotion(packet.playerInfo.motion);
|
|
}
|
|
playerCharacters[packet.playerInfo.playerIndex].ResetDirection();
|
|
}
|
|
|
|
void InWorld::HandleRegionContent(NetworkPacket packet) {
|
|
//replace existing regions
|
|
if (regionPager.FindRegion(packet.regionInfo.x, packet.regionInfo.y)) {
|
|
regionPager.UnloadRegion(packet.regionInfo.x, packet.regionInfo.y);
|
|
}
|
|
regionPager.PushRegion(packet.regionInfo.region);
|
|
packet.regionInfo.region = nullptr;
|
|
}
|
|
|
|
//-------------------------
|
|
//Server control
|
|
//-------------------------
|
|
|
|
void InWorld::SendState() {
|
|
NetworkPacket packet;
|
|
char buffer[PACKET_BUFFER_SIZE];
|
|
|
|
//pack the packet
|
|
packet.meta.type = NetworkPacket::Type::PLAYER_UPDATE;
|
|
packet.playerInfo.clientIndex = clientIndex;
|
|
packet.playerInfo.playerIndex = playerIndex;
|
|
packet.playerInfo.position = localCharacter->GetPosition();
|
|
packet.playerInfo.motion = localCharacter->GetMotion();
|
|
|
|
serialize(&packet, buffer);
|
|
network.Send(Channels::SERVER, buffer, PACKET_BUFFER_SIZE);
|
|
}
|
|
|
|
void InWorld::RequestDisconnect() {
|
|
NetworkPacket packet;
|
|
char buffer[PACKET_BUFFER_SIZE];
|
|
|
|
//send a disconnect request
|
|
packet.meta.type = NetworkPacket::Type::DISCONNECT;
|
|
packet.clientInfo.index = clientIndex;
|
|
serialize(&packet, buffer);
|
|
network.Send(Channels::SERVER, buffer, PACKET_BUFFER_SIZE);
|
|
}
|
|
|
|
void InWorld::RequestShutDown() {
|
|
NetworkPacket packet;
|
|
char buffer[PACKET_BUFFER_SIZE];
|
|
|
|
//send a shutdown request
|
|
packet.meta.type = NetworkPacket::Type::SHUTDOWN;
|
|
packet.clientInfo.index = clientIndex;
|
|
serialize(&packet, buffer);
|
|
network.Send(Channels::SERVER, buffer, PACKET_BUFFER_SIZE);
|
|
}
|
|
|
|
void InWorld::RequestRegion(int x, int y) {
|
|
NetworkPacket packet;
|
|
char buffer[PACKET_BUFFER_SIZE];
|
|
|
|
//pack the region's data
|
|
packet.meta.type = NetworkPacket::Type::REGION_REQUEST;
|
|
packet.regionInfo.x = x;
|
|
packet.regionInfo.y = y;
|
|
serialize(&packet, buffer);
|
|
network.Send(Channels::SERVER, buffer, PACKET_BUFFER_SIZE);
|
|
}
|
|
|
|
//-------------------------
|
|
//Utilities
|
|
//-------------------------
|
|
|
|
int InWorld::CheckBufferDistance(Region* const region) {
|
|
/* TODO: Remove InWorld::CheckBufferDistance(), and replace it with a simpler system
|
|
* DOCUMENTATION
|
|
* This algorithm is extremely complex and involed, but initial tests show
|
|
* that it gives the right answers. The purpose is to determine how far off screen
|
|
* a certain region is, so that it can be unloaded when necessary.
|
|
*
|
|
* If the region is actually onscreen, then there's no reason to run the rest, so
|
|
* the algorithm corrects for the camera's location, before checking the bounds of
|
|
* the screen.
|
|
*
|
|
* The next part is tricky. If X or Y is negative, then it is divided by the
|
|
* graphical size of the regions, resulting in a usable integer, representing how
|
|
* far from the screen it is in "region units". If, however, X or Y is larger than
|
|
* 0, than first, the size of the screen is subtracted from that variable, before
|
|
* it is then divided by the graphical size of a region. Finally, to compensate for
|
|
* the off by one error, 1 is added at the end.
|
|
*
|
|
* Since only the magnitude of the distance in either direction is needed, this
|
|
* method returns the largest absolute value of X or Y.
|
|
*
|
|
* The final result of this algorithm is an integer representing how far, rounded
|
|
* up, a certain region is from the screen's edges in any direction, measured in
|
|
* "region units". This algorithm may be flawed, in which case, I recommend simply
|
|
* replacing it with a boolean check, to see if the region's distance from the player
|
|
* is larger than a certain value. This algorithm lacks the advantages I initially
|
|
* expected, so that may be beneficial at some point.
|
|
*/
|
|
|
|
//locations relative to the camera
|
|
int x = region->GetX() - camera.x;
|
|
int y = region->GetY() - camera.y;
|
|
|
|
//if the region is visible, return -1
|
|
if (x >= -REGION_WIDTH * tileSheet.GetTileW() && x < camera.width &&
|
|
y >= -REGION_HEIGHT * tileSheet.GetTileH() && y < camera.height) {
|
|
return -1;
|
|
}
|
|
|
|
//prune the screen's area from the algorithm; get the pseudo-indexes
|
|
if (x < 0) x /= (REGION_WIDTH * tileSheet.GetTileW());
|
|
if (y < 0) y /= (REGION_HEIGHT * tileSheet.GetTileH());
|
|
if (x > 0) x = (x - camera.width) / (REGION_WIDTH * tileSheet.GetTileW()) + 1;
|
|
if (y > 0) y = (y - camera.height) / (REGION_HEIGHT * tileSheet.GetTileH()) + 1;
|
|
|
|
//return the pseudo-index with the greatest magnitude
|
|
return std::max(abs(x), abs(y));
|
|
}
|
|
|
|
//TODO: eew ugly
|
|
void InWorld::UpdateMap() {
|
|
//prune distant regions
|
|
for (auto it = regionPager.GetContainer()->begin(); it != regionPager.GetContainer()->end(); /* EMPTY */) {
|
|
if (CheckBufferDistance(*it) > 2) {
|
|
regionPager.UnloadRegion((*it)->GetX(), (*it)->GetY());
|
|
|
|
//reset
|
|
it = regionPager.GetContainer()->begin();
|
|
continue;
|
|
}
|
|
++it;
|
|
}
|
|
|
|
//TODO: make the region units official
|
|
int regionUnitX = REGION_WIDTH * tileSheet.GetTileW();
|
|
int regionUnitY = REGION_HEIGHT * tileSheet.GetTileH();
|
|
|
|
//request empty regions, including buffers (-1 & +1 region unit)
|
|
for (int i = snapToBase(regionUnitX, camera.x - regionUnitX); i <= snapToBase(regionUnitX, camera.x + camera.width + regionUnitX); i += regionUnitX) {
|
|
for (int j = snapToBase(regionUnitY, camera.y - regionUnitY); j <= snapToBase(regionUnitY, camera.y + camera.height + regionUnitY); j += regionUnitY) {
|
|
if (!regionPager.FindRegion(i, j)) {
|
|
RequestRegion(i, j);
|
|
}
|
|
}
|
|
}
|
|
}
|