C++ DataBuffer::copy方法代码示例

int UDPManager::sendDatagram(DataBuffer * data, unsigned long ipAddress, unsigned long port, unsigned long frameCount) {
	if (initErrors || data == NULL || port == 0) return -1;

	sockaddr_in otherAddress;
	otherAddress.sin_family = AF_INET;
	otherAddress.sin_addr.s_addr = ipAddress;
	otherAddress.sin_port = port;

	int packetSize = data->getSize();
	DataBuffer * sendBuffer = new DataBuffer(packetSize + 4);
	//sendBuffer->copy(0, &packetSize, sizeof(int));
	sendBuffer->copy(0, &frameCount, 4);
	sendBuffer->copy(4, data->getData(), data->getSize());

	if (sendto(sock, sendBuffer->getData(), sendBuffer->getSize(), 0, (struct sockaddr *)&otherAddress, sizeof(otherAddress)) < 0) {
		perror("UDP sendto() failed\n");
		delete sendBuffer;
		return -1;
	}

	//printf("UDP Send:");
	//Utilities::printfNetworkPacket(sendBuffer->getData(), sendBuffer->getSize());
	delete sendBuffer;

	return 0;
}

DataBuffer * NetworkFunctions::createClearObjectsBuffer()
{
	DataBuffer * tempBuffer = new DataBuffer(5);
	int functionID = EVENT_CLEAR_OBJECTS;
	tempBuffer->copy(0, &functionID, 4);
	tempBuffer->copy(4, "\n", 1);
	return tempBuffer;
}

DataBuffer * NetworkFunctions::createUpdateObjectBuffer(unsigned long netID)
{
	GameObject * tempObject = gameObjects->getValue(netID);
	if (tempObject == NULL) return NULL;
	DataBuffer * tempBuffer = tempObject->serialize();
	int functionIndex = EVENT_UPDATE_GAME_OBJECT;
	tempBuffer->copy(0, &functionIndex, 4);
	tempBuffer->copy(4, &netID, 4);
	return tempBuffer;
}

DataBuffer * Spell::createDamageBuffer(int playerID, int targetID, int damage, int spellID)
{
	if (spellID < 0 || spellID >= SPELLID_COUNT) return NULL;

	DataBuffer * tempBuffer = new DataBuffer(21);
	int functionIndex = EVENT_DAMAGE;
	tempBuffer->copy(0, &functionIndex, 4);
	tempBuffer->copy(4, &playerID, 4);
	tempBuffer->copy(8, &targetID, 4);
	tempBuffer->copy(12, &damage, 4);
	tempBuffer->copy(16, &spellID, 4);
	tempBuffer->copy(20, "\n", 1);
	return tempBuffer;
}

DataBuffer * Spell::createCentralForceBuffer(GameObject * g, glm::vec3 force, int spellID)
{
	if (spellID < 0 || spellID >= SPELLID_COUNT) return NULL;
	if (g == NULL) return NULL;

	DataBuffer * tempBuffer = g->createSpellCentralForceBuffer(force, spellID);
	tempBuffer->copy(8, &ownerID, 4);
	return tempBuffer;
}

DataBuffer * RigidObject::serialize()
{
	if (!physInit) return NULL;

	btVector3 pos = body->getCenterOfMassPosition();
	btVector3 linVel = body->getLinearVelocity();
	btQuaternion orient = body->getOrientation();
	btVector3 angVel = body->getAngularVelocity();

	DataBuffer * tempBuffer = new DataBuffer(getSerializedSize());

	float test = 1.0f;
	memcpy(&test, &pos.x(), 4);

	int uninit = -1;
	tempBuffer->copy(0, &uninit, 4); //function ID
	
	unsigned long netID = getNetID();
	tempBuffer->copy(4, &netID, 4);
	tempBuffer->copy(8,		&pos.x(),		4);
	tempBuffer->copy(12,	&pos.y(),		4);
	tempBuffer->copy(16,	&pos.z(),		4);
	tempBuffer->copy(20,	&linVel.x(),	4);
	tempBuffer->copy(24,	&linVel.y(),	4);
	tempBuffer->copy(28,	&linVel.z(),	4);
	tempBuffer->copy(32,	&orient.x(),	4);
	tempBuffer->copy(36,	&orient.y(),	4);
	tempBuffer->copy(40,	&orient.z(),	4);
	tempBuffer->copy(44,	&orient.w(),	4);
	tempBuffer->copy(48,	&angVel.x(),	4);
	tempBuffer->copy(52,	&angVel.y(),	4);
	tempBuffer->copy(56,	&angVel.z(),	4);

	tempBuffer->copy(60, "\n", 1);

	return tempBuffer;
}

DataBuffer * Fireball::createCreateFireballBuffer()
{
	if (owner == NULL) return NULL;

	DataBuffer * tempBuffer = new DataBuffer(33);
	int functionIndex = EVENT_CREATE_FIREBALL;
	tempBuffer->copy(0, &functionIndex, 4);
	tempBuffer->copy(4, &ownerID, 4);
	tempBuffer->copy(8, &position.x, 4);
	tempBuffer->copy(12, &position.y, 4);
	tempBuffer->copy(16, &position.z, 4);
	tempBuffer->copy(20, &direction.x, 4);
	tempBuffer->copy(24, &direction.y, 4);
	tempBuffer->copy(28, &direction.z, 4);
	tempBuffer->copy(32, "\n", 1);

	return tempBuffer;
}

int NetworkFunctions::translateReceivedEvents(Packet * serverEvents)
{
	while (serverEvents->getReceiveBufferSize() > 0) {
		DataBuffer * tempBuffer = new DataBuffer(MAX_PACKET_SIZE);

		int charCount = 0;
		int functionIndex = -1;
		int bufferLength = -1;
		for (int i = 0; i < serverEvents->getReceiveBufferSize(); i++) {
			tempBuffer->copy(tempBuffer->getSize(), serverEvents->getReceiveBuffer() + i, 1);

			if (charCount == 3) {
				memcpy(&functionIndex, tempBuffer->getData(), 4);
				if (functionIndex < 0 || functionIndex >= FUNCTION_COUNT || functionIndex == 10) {
					while ((serverEvents->getReceiveBuffer()[i]) != '\n') i++;
					tempBuffer->clear();
					continue;
				}
				else {
					bufferLength = bufferSizes[functionIndex];
				}
			}

			if (charCount == 7 && functionIndex == EVENT_UPDATE_GAME_OBJECT) {
				unsigned long netID = 0;
				memcpy(&netID, tempBuffer->getData() + 4, 4);
				GameObject * tempObject = gameObjects->getValue(netID);
				if (tempObject == NULL) {
					while ((serverEvents->getReceiveBuffer()[i]) != '\n') i++;
					tempBuffer->clear();
					continue;
				}
				/*int objectIndex = -1;
				memcpy(&objectIndex, tempBuffer->getData() + 4, 4);
				if (objectIndex < 0 || objectIndex >= gameObjects->size()) {
					while ((serverEvents->getReceiveBuffer()[i]) != '\n') i++;
					tempBuffer->clear();
					continue;
				}*/
				else {
					bufferLength = tempObject->getSerializedSize();
				}
			}

			if (charCount == bufferLength-1) {
				if (tempBuffer->getSize() == 0) {
					tempBuffer->clear();
					continue;
				}

				executeIndexedFunction(tempBuffer);
				tempBuffer->clear();
				charCount = 0;
				continue;
			}

			/*if (serverEvents->getReceiveBuffer()[i] == '\n') {
				if (tempBuffer->getSize() == 0) {
					tempBuffer->clear();
					continue;
				}

				executeIndexedFunction(tempBuffer);

				tempBuffer->clear();
			}*/
			charCount++;
		}
		delete tempBuffer;
		serverEvents->refillReceiveBuffer();
	}
	return 0;
}