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Extreme jank to support players

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This commit is contained in:
Holly Stubbs 2021-08-24 15:08:48 +01:00
parent 9084a1e69f
commit 1001bb88fe
8 changed files with 192 additions and 11 deletions
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20
server/Converter.js
View file

@ -1,7 +1,23 @@
module.exports.toAbsoluteInt = function(float = 0.0) {
return Math.round(float * 32.0);
return Math.floor(float * 32.0);
}
module.exports.to360Fraction = function(float = 0.0) {
return Math.floor((float / 360) * 256);
if (float < 0) {
return Math.abs(Math.max(Math.floor((map(float, 0, -360, 360, 0) / 360) * 256) - 1, 0));
} else if (float > 0) {
return Math.max(Math.floor((float / 360) * 256) - 1, 0);
}
//return Math.max(Math.floor((float / 360) * 256), 0) - 1;
}
function map(input, inputMin, inputMax, outputMin, outputMax) {
const newv = (input - inputMin) / (inputMax - inputMin) * (outputMax - outputMin) + outputMin;
if (outputMin < outputMax) return constrain(newv, outputMin, outputMax);
else return constrain(newv, outputMax, outputMin);
}
function constrain(input, low, high) {
return Math.max(Math.min(input, high), low);
}

61
server/Entities/EntityPlayer.js
View file

@ -1,10 +1,65 @@
const EntityLiving = require("./EntityLiving.js");
const user = require("../user.js");
const Converter = require("../Converter.js");
const PacketMappingTable = require("../PacketMappingTable.js");
const NamedPackets = require("../NamedPackets.js");
class EntityPlayer extends EntityLiving {
constructor(EID = 0, x = 0, y = 0, z = 0) {
super(EID, x, y, z);
constructor(parent = new user, x = 0, y = 0, z = 0) {
super(parent.id, x, y, z);
this.lastX = 0;
this.lastY = 0;
this.lastZ = 0;
this.absX = 0;
this.absY = 0;
this.absZ = 0;
this.absYaw = 0;
this.absPitch = 0;
this.lastYaw = 0;
this.lastPitch = 0;
this.allPacket = new PacketMappingTable[NamedPackets.EntityTeleport](this.EID, this.x, this.y, this.z, this.absYaw, this.absPitch);
this.allPacket.soup();
this.allPacket.writePacket();
this.parentPlayer = parent;
}
onTick() {
super.onTick();
this.absX = Math.floor(this.x);
this.absY = Math.floor(this.y);
this.absZ = Math.floor(this.z);
this.absYaw = Math.floor(this.yaw);
this.absPitch = Math.floor(this.pitch);
if ((this.absX != this.lastX || this.absY != this.lastY || this.absZ != this.lastZ)) {
// all
this.allPacket.writer.offset = 5;
this.allPacket.writer.writeInt(Converter.toAbsoluteInt(this.x));
this.allPacket.writer.writeInt(Converter.toAbsoluteInt(this.y));
this.allPacket.writer.writeInt(Converter.toAbsoluteInt(this.z));
this.allPacket.writer.writeUByte(Converter.to360Fraction(this.absYaw));
this.allPacket.writer.writeUByte(Converter.to360Fraction(this.absPitch));
global.sendToAllPlayersButSelf(this.EID, this.allPacket.toBuffer());
} else if (this.absYaw != this.lastYaw || this.absPitch != this.lastPitch) {
// look only
global.sendToAllPlayersButSelf(this.EID, new PacketMappingTable[NamedPackets.EntityLook](this.EID, this.absYaw, this.absPitch).writePacket());
}
this.lastYaw = this.absYaw;
this.lastPitch = this.absPitch;
this.lastX = this.absX;
this.lastY = this.absY;
this.lastZ = this.absZ;
}
}

4
server/PacketMappingTable.js
View file

@ -8,6 +8,8 @@ const Packet0KeepAlive = require("./Packets/Packet0KeepAlive.js"),
Packet13PlayerPositionAndLook = require("./Packets/Packet13PlayerPositionAndLook.js"),
Packet18Animation = require("./Packets/Packet18Animation.js"),
Packet20NamedEntitySpawn = require("./Packets/Packet20NamedEntitySpawn.js"),
Packet32EntityLook = require("./Packets/Packet32EntityLook.js"),
Packet34EntityTeleport = require("./Packets/Packet34EntityTeleport.js"),
Packet50PreChunk = require("./Packets/Packet50PreChunk.js"),
Packet53BlockChange = require("./Packets/Packet53BlockChange.js"),
Packet103SetSlot = require("./Packets/Packet103SetSlot.js");
@ -23,6 +25,8 @@ const mappingTable = {
0x0D: Packet13PlayerPositionAndLook,
0x12: Packet18Animation,
0x14: Packet20NamedEntitySpawn,
0x20: Packet32EntityLook,
0x22: Packet34EntityTeleport,
0x32: Packet50PreChunk,
0x35: Packet53BlockChange,
0x67: Packet103SetSlot

4
server/Packets/Packet.js
View file

@ -4,11 +4,13 @@ module.exports = class {
constructor(packetID = 0x00) {
this.id = packetID;
this.packetSize = 0;
this.writer = null;
}
writePacket() {
this.writer = new bufferStuff.Writer();
this.writer = new bufferStuff.Writer(this.packetSize);
this.writer.writeByte(this.id);

4
server/Packets/Packet20NamedEntitySpawn.js
View file

@ -23,8 +23,8 @@ class Packet20NamedEntitySpawn extends Packet {
this.writer.writeInt(this.absX);
this.writer.writeInt(this.absY);
this.writer.writeInt(this.absZ);
this.writer.writeByte(this.packedYaw);
this.writer.writeByte(this.packedPitch);
this.writer.writeUByte(this.packedYaw);
this.writer.writeUByte(this.packedPitch);
this.writer.writeShort(this.currentItem);
return this.toBuffer();

26
server/Packets/Packet32EntityLook.js Normal file
View file

@ -0,0 +1,26 @@
const Packet = require("./Packet.js");
const Converter = require("../Converter.js");
class Packet32EntityLook extends Packet {
constructor(EID = 0, yaw = 0, pitch = 0) {
super(0x20);
this.packetSize = 7;
this.EID = EID;
this.packedYaw = Converter.to360Fraction(yaw);
this.packedPitch = Converter.to360Fraction(pitch);
}
writePacket() {
super.writePacket();
this.writer.writeInt(this.EID);
this.writer.writeUByte(this.packedYaw);
this.writer.writeUByte(this.packedPitch);
return this.toBuffer();
}
}
module.exports = Packet32EntityLook;

34
server/Packets/Packet34EntityTeleport.js Normal file
View file

@ -0,0 +1,34 @@
const Packet = require("./Packet.js");
const Converter = require("../Converter.js");
class Packet34EntityTeleport extends Packet {
constructor(EID = 0, x = 0, y = 0, z = 0, yaw = 0, pitch = 0) {
super(0x22);
this.packetSize = 19;
this.EID = EID;
this.absX = Converter.toAbsoluteInt(x);
this.absY = Converter.toAbsoluteInt(y);
this.absZ = Converter.toAbsoluteInt(z);
this.packedYaw = Converter.to360Fraction(yaw);
this.packedPitch = Converter.to360Fraction(pitch);
}
soup() {
super.writePacket();
this.writer.writeInt(this.EID);
}
writePacket() {
this.writer.writeInt(this.absX);
this.writer.writeInt(this.absY);
this.writer.writeInt(this.absZ);
this.writer.writeUByte(this.packedYaw);
this.writer.writeUByte(this.packedPitch);
return this.toBuffer();
}
}
module.exports = Packet34EntityTeleport;

50
server/server.js
View file

@ -22,9 +22,24 @@ global.getUserByKey = function(key) {
return netUsers[key];
}
global.sendToAllPlayers = function(buffer = Buffer.alloc(0)) {
for (let key of netUserKeys) {
const user = netUsers[key];
user.socket.write(buffer);
}
}
global.sendToAllPlayersButSelf = function(id, buffer = Buffer.alloc(0)) {
for (let key of netUserKeys) {
if (key == id) continue;
const user = netUsers[key];
user.socket.write(buffer);
}
}
function addUser(socket) {
let user = new User(global.fromIDPool(), socket);
user.entityRef = new EntityPlayer(user.id, 8.5, 65.5, 8.5);
user.entityRef = new EntityPlayer(user, 8.5, 65.5, 8.5);
netUsers[user.id] = user;
netUserKeys = Object.keys(netUsers);
@ -95,7 +110,7 @@ module.exports.init = function(config) {
for (let key of netUserKeys) {
const user = netUsers[key];
//user.entityRef.onTick();
if (user.loginFinished) user.entityRef.onTick();
}
// Send queued chunks to users
@ -177,8 +192,16 @@ module.exports.connection = async function(socket = new Socket) {
}
}
// Send this user to other online users
// Send this user to other online user
global.sendToAllPlayersButSelf(thisUser.id, new PacketMappingTable[NamedPackets.NamedEntitySpawn](thisUser.id, thisUser.username, thisUser.entityRef.x, thisUser.entityRef.y, thisUser.entityRef.z, thisUser.entityRef.yaw, thisUser.entityRef.pitch, 0).writePacket());
// send all online users to this user
for (let key of netUserKeys) {
if (key == thisUser.id) continue;
const user = netUsers[key];
socket.write(new PacketMappingTable[NamedPackets.NamedEntitySpawn](user.id, user.username, user.entityRef.x, user.entityRef.y, user.entityRef.z, user.entityRef.yaw, user.entityRef.pitch, 0).writePacket());
}
break;
case NamedPackets.Handshake:
@ -227,6 +250,27 @@ module.exports.connection = async function(socket = new Socket) {
}
break;
case NamedPackets.PlayerLook:
thisUser.entityRef.yaw = reader.readFloat() % 360 % -360;
thisUser.entityRef.pitch = reader.readFloat() % 360 % -360;
break;
case NamedPackets.PlayerPosition:
thisUser.entityRef.x = reader.readDouble();
thisUser.entityRef.y = reader.readDouble();
reader.readDouble(); // stance
thisUser.entityRef.z = reader.readDouble();
break;
case NamedPackets.PlayerPositionAndLook:
thisUser.entityRef.x = reader.readDouble();
thisUser.entityRef.y = reader.readDouble();
reader.readDouble(); // stance
thisUser.entityRef.z = reader.readDouble();
thisUser.entityRef.yaw = reader.readFloat() % 360 % -360;
thisUser.entityRef.pitch = reader.readFloat() % 360 % -360;
break;
case NamedPackets.Animation:
const EID = reader.readInt();
const cachedPacket = new PacketMappingTable[NamedPackets.Animation](thisUser.id, reader.readByte()).writePacket();