Added JSON communication, basic simulation with sound.

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "contrib/libwebsockets"]
 	path = contrib/libwebsockets
 	url = git://github.com/warmcat/libwebsockets.git
+[submodule "contrib/json-spirit"]
+	path = contrib/json-spirit
+	url = git://github.com/sirikata/json-spirit.git

CMakeLists.txt

@@ -49,4 +49,11 @@ set(WITHOUT_TESTAPPS ON CACHE INTERNAL "" FORCE)
 add_subdirectory(${PROJECT_SOURCE_DIR}/contrib/libwebsockets/)
 include_directories(SYSTEM "${PROJECT_SOURCE_DIR}/contrib/libwebsockets/")
 
+# JSON lib
+set(JSON_SPIRIT_BUILD_DEMOS OFF CACHE INTERNAL "" FORCE)
+set(JSON_SPIRIT_BUILD_TESTS OFF CACHE INTERNAL "" FORCE)
+set(JSON_SPIRIT_LIBRARY_TYPE "STATIC" CACHE INTERNAL "" FORCE)
+add_subdirectory(${PROJECT_SOURCE_DIR}/contrib/json-spirit/build ${CMAKE_CURRENT_BINARY_DIR}/json-spirit)
+include_directories(SYSTEM "${PROJECT_SOURCE_DIR}/contrib/json-spirit/include/")
+
 add_subdirectory("src")

contrib/json-spirit

@@ -0,0 +1 @@
+Subproject commit b585cf771ca10de706f96ddbd6d853dde72c6bbd

sdlgame.sublime-project

@@ -39,6 +39,7 @@
 			"-I${folder:${project_path:sdlgame.sublime-project}}",
 			"-I${folder:${project_path:sdlgame.sublime-project}}/motor",
 			"-isystem${folder:${project_path:sdlgame.sublime-project}}/contrib/libwebsockets/",
+			"-isystem${folder:${project_path:sdlgame.sublime-project}}/contrib/json-spirit/include",
 			"-isystem${folder:${project_path:sdlgame.sublime-project}}/motor/contrib/assimp-3.0.1270/include",
 			"-isystem${folder:${project_path:sdlgame.sublime-project}}/motor/contrib/soil",
 			"-isystem${folder:${project_path:sdlgame.sublime-project}}/motor/contrib/bullet/src",

src/CMakeLists.txt

@@ -60,4 +60,4 @@ set(all_friggin_libraries onegame_common ${boost} ${motor} ${moggle} ${assimp} $
 
 file(GLOB client_sources "client/*.cpp")
 add_executable(client client_main.cpp ${client_sources})
-target_link_libraries(client ${all_friggin_libraries} websockets)
+target_link_libraries(client ${all_friggin_libraries} websockets json_spirit)

src/client/client.cpp

@@ -3,7 +3,12 @@
 #include <cmath>
 #include <stdexcept>
 
+#include "../../../beats-server/src/json.h"
+#include "../../../beats-server/src/json_ext.h"
+
 namespace games {
+	static Client * current_client{nullptr};
+
 	int callback_func(libwebsocket_context * context, libwebsocket * wsi, libwebsocket_callback_reasons reason, void * user, void * in, size_t len){
 		unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 2 + LWS_SEND_BUFFER_POST_PADDING];
 		buf[LWS_SEND_BUFFER_PRE_PADDING] = 'a';
@@ -13,11 +18,25 @@ namespace games {
 				libwebsocket_callback_on_writable(context, wsi);
 				break;
 			case LWS_CALLBACK_CLIENT_RECEIVE:
-				std::cout << std::string(static_cast<char*>(in), len) << std::endl;
+				// std::cout << std::string(static_cast<char*>(in), len) << std::endl;
 				break;
-			case LWS_CALLBACK_CLIENT_WRITEABLE:
-				libwebsocket_write(wsi, &buf[LWS_SEND_BUFFER_PRE_PADDING], 1, LWS_WRITE_TEXT);
+			case LWS_CALLBACK_CLIENT_WRITEABLE:{
+				js::Object ret;
+				if(current_client->lines_changed){
+					ret["lines"] = vector_to_json(current_client->lines, [](std::shared_ptr<Instrument> const & i){return cheap_line_type(*i);});
+					current_client->lines_changed = false;
+				} else {
+					ret["balls"] = vector_to_json(current_client->sim.balls, [](ball_type const & b){return cheap_ball_type(b);});
+				}
+				std::string string_to_send = write_json(ret);
+
+				unsigned char * buf = new unsigned char [LWS_SEND_BUFFER_PRE_PADDING + string_to_send.size() + LWS_SEND_BUFFER_POST_PADDING];
+				memcpy(&buf[LWS_SEND_BUFFER_PRE_PADDING], string_to_send.c_str(), string_to_send.size());
+				int n = libwebsocket_write(wsi, &buf[LWS_SEND_BUFFER_PRE_PADDING], string_to_send.size(), LWS_WRITE_TEXT);
+				if (n < 0) return 1;
+				if (n < string_to_send.size()) return -1;
 				break;
+			}
 			default: break;
 		}
 		return 0;
@@ -36,6 +55,8 @@ namespace games {
 		for(auto & l : line->calculate_lines()){
 			sim.lines.push_back(l);
 		}
+
+		lines_changed = true;
 	}
 
 	bool Client::has_ended(){
@@ -52,6 +73,11 @@ namespace games {
 	Client::Client(int window_width_, int window_height_, std::shared_ptr<Base>& active_base_)
 	: Base(window_width_, window_height_, active_base_)
 	{
+		if(current_client){
+			CERR << "Warning: global client already defined\n";
+		}
+		current_client = this;
+
 		// simulation
 		beat.notes.emplace_back(note_type::kQuarterNote, note_info{100.0f, 100.0f});
 		cheap_line_type line{{{50.0f, 100.0f}, {150.0f, 200.0f}, simulation::kOneWay}};
@@ -131,20 +157,21 @@ namespace games {
 		}
 
 		// websockets
-		const float poll_interval = 5.0;
-		poll_time += dt;
+		const float push_interval = 0.05;
+		push_time += dt;
 
 		int ret = libwebsocket_service(context, 10);
 		if(ret < 0) {
 			CERR << "ERROR: libwebsocket returns < 0\n";
 		}
-		if(poll_time >= poll_interval){
+		if(push_time >= push_interval){
 			libwebsocket_callback_on_writable(context, wsi);
-			poll_time -= poll_interval;
+			push_time -= push_interval;
 		}
 	}
 
 	Client::~Client(){
 		libwebsocket_context_destroy(context);
+		current_client = nullptr;
 	}
 }

src/client/client.hpp

@@ -22,7 +22,8 @@ namespace games {
 		// websocket part
 		libwebsocket_context * context{nullptr};
 		libwebsocket * wsi{nullptr};
-		float poll_time{0.0};
+		float push_time{0.0};
+		bool lines_changed{true};
 
 		// simulation part
 		int balluid{0};