diff --git a/src/game/game.js b/src/game/game.js
index fc6b11888ea3972cbed1ea5a12de9f74963e3d02..801a4c216fdf738705a605b9a2ef8de6487f2f95 100644
--- a/src/game/game.js
+++ b/src/game/game.js
@@ -7,6 +7,14 @@ const cellTypes = {
BORDER: 5,
};
+const COLLISIONTYPES = {
+ NONE: 0,
+ FOOD: 1,
+ BANANA: 2,
+ BORDER: 3,
+ SNAKE: 4,
+};
+
function createCell(x, y, type) {
return {
x: x,
@@ -51,8 +59,39 @@ function addFood(gameBoard) {
return gameBoard;
}
+function checkCollisions(newY, newX, gameBoard) {
+ // returns a list of players that have collided,
+ // and a new gameBoard with the players removed
+ if (
+ newX < 0 ||
+ newX >= gameBoard[0].length ||
+ newY < 0 ||
+ newY >= gameBoard.length
+ ) {
+ console.log(`Player has collided with the wall!`);
+ return COLLISIONTYPES.BORDER;
+ }
+ //Handle collision with food
+ if (gameBoard[newY][newX].type === cellTypes.FOOD) {
+ console.log(`Player has eaten the food!`);
+ return COLLISIONTYPES.FOOD;
+ }
+ //Handle collision with banana
+ if (gameBoard[newY][newX].type == cellTypes.BANANA) {
+ console.log("Slip");
+ return COLLISIONTYPES.BANANA;
+ }
+ //Handle collision with border
+ if (gameBoard[newY][newX].type == cellTypes.BORDER) {
+ console.log("Void");
+ return COLLISIONTYPES.BORDER;
+ }
+ return COLLISIONTYPES.NONE;
+}
+
module.exports = {
cellTypes,
+ COLLISIONTYPES,
createGameBoard: (width, height) => {
let gameBoard = [];
@@ -103,6 +142,7 @@ module.exports = {
moveOneStep: (gameBoard) => {
//Save board state to allow multiple snake movements
let updatedBoard = gameBoard.map((row) => row.map((cell) => ({ ...cell })));
+ let deadPlayers = [];
//Loop through board until we find a PLAYERHEAD
for (var i = 0; i < gameBoard.length; i++) {
@@ -131,57 +171,28 @@ module.exports = {
newX -= 1;
}
- //Check for collisions with walls
+ let collision = checkCollisions(newY, newX, gameBoard);
+
if (
- newX < 0 ||
- newX >= gameBoard[0].length ||
- newY < 0 ||
- newY >= gameBoard.length
+ collision === COLLISIONTYPES.BANANA ||
+ collision === COLLISIONTYPES.FOOD
) {
- console.log(`Player ${cell.pid} has collided with the wall!`);
- //Remove the player from the game (indicating death)
+ updatedBoard = addFood(updatedBoard);
+ }
+ if (collision > COLLISIONTYPES.FOOD) {
updatedBoard = updatedBoard.map((row) =>
row.map((c) =>
c.pid === cell.pid ? createCell(c.x, c.y, cellTypes.EMPTY) : c,
),
);
+ deadPlayers.push(cell.pid);
continue;
}
-
- //Handle collision with food
- if (gameBoard[newY][newX].type === cellTypes.FOOD) {
- console.log(`Player ${cell.pid} has eaten the food!`);
- //Add new body segment at the current head's position
+ if (collision === COLLISIONTYPES.FOOD) {
let newBodySegment = createCell(oldX, oldY, cellTypes.PLAYERBODY);
newBodySegment.pid = cell.pid;
newBodySegment.next = cell.next;
cell.next = newBodySegment;
- //Place new food somewhere else
- updatedBoard = addFood(updatedBoard);
- }
-
- //Handle collision with banana
- if (gameBoard[newY][newX].type == cellTypes.BANANA) {
- console.log("Slip");
- updatedBoard[newY][newX] = createCell(newX, newY, cellTypes.EMPTY);
- updatedBoard = updatedBoard.map((row) =>
- row.map((c) =>
- c.pid === cell.pid ? createCell(c.x, c.y, cellTypes.EMPTY) : c,
- ),
- );
- updatedBoard = addFood(updatedBoard);
- continue;
- }
-
- //Handle collision with border
- if (gameBoard[newY][newX].type == cellTypes.BORDER) {
- console.log("Void");
- updatedBoard = updatedBoard.map((row) =>
- row.map((c) =>
- c.pid === cell.pid ? createCell(c.x, c.y, cellTypes.EMPTY) : c,
- ),
- );
- continue;
}
//Snake head to new position by updating cell object
@@ -219,63 +230,58 @@ module.exports = {
}
}
}
- return updatedBoard;
+ return [updatedBoard, deadPlayers];
},
applyBorders: (gameBoard, borderCounter) => {
let height = gameBoard.length;
- let width = gameBoard[0].length;
-
- //console.log(borderCounter);
+ let width = gameBoard[0].length;
+
+ //console.log(borderCounter);
//Return gameBoard when it is 2x2
- if (borderCounter * 2 >= (Math.min(height, width)) - 2) {
+ if (borderCounter * 2 >= Math.min(height, width) - 2) {
return gameBoard;
}
//Top
- for (let x = 0; x < width; x++) {
+ for (let x = 0; x < width; x++) {
gameBoard[borderCounter][x].type = cellTypes.BORDER;
- gameBoard[borderCounter][x].pid = 0;
- gameBoard[borderCounter][x].direction = 0;
- gameBoard[borderCounter][x].next = null;
+ gameBoard[borderCounter][x].pid = 0;
+ gameBoard[borderCounter][x].direction = 0;
+ gameBoard[borderCounter][x].next = null;
}
//Bottom
- for (let x = 0; x < width; x++) {
+ for (let x = 0; x < width; x++) {
gameBoard[height - borderCounter - 1][x].type = cellTypes.BORDER;
- gameBoard[height - borderCounter - 1][x].pid = 0;
- gameBoard[height - borderCounter - 1][x].direction = 0;
- gameBoard[height - borderCounter - 1][x].next = null;
+ gameBoard[height - borderCounter - 1][x].pid = 0;
+ gameBoard[height - borderCounter - 1][x].direction = 0;
+ gameBoard[height - borderCounter - 1][x].next = null;
}
//Left
- for (let y = 0; y < height; y++) {
+ for (let y = 0; y < height; y++) {
gameBoard[y][borderCounter].type = cellTypes.BORDER;
- gameBoard[y][borderCounter].pid = 0;
- gameBoard[y][borderCounter].direction = 0;
- gameBoard[y][borderCounter].next = null;
+ gameBoard[y][borderCounter].pid = 0;
+ gameBoard[y][borderCounter].direction = 0;
+ gameBoard[y][borderCounter].next = null;
}
//Right
- for (let y = 0; y < height; y++) {
+ for (let y = 0; y < height; y++) {
gameBoard[y][width - borderCounter - 1].type = cellTypes.BORDER;
- gameBoard[y][width - borderCounter - 1].pid = 0;
- gameBoard[y][width - borderCounter - 1].direction = 0;
- gameBoard[y][width - borderCounter - 1].next = null;
+ gameBoard[y][width - borderCounter - 1].pid = 0;
+ gameBoard[y][width - borderCounter - 1].direction = 0;
+ gameBoard[y][width - borderCounter - 1].next = null;
}
-
- return gameBoard;
+
+ return gameBoard;
},
- getPlayerView: (gameBoard, pid) => {
+ getPlayerView: (gameBoard, pid) => {
let updatedBoard = gameBoard.map((row) => row.map((cell) => ({ ...cell })));
- // YANG: Find head with pid = pid
- // return [x][y] around head
- },
-
- checkCollisions: (gameBoard) => {
- // returns a list of players that have collided,
- // and a new gameBoard with the players removed
+ // YANG: Find head with pid = pid
+ // return [x][y] around head
},
};
diff --git a/src/models/WebSocketModel.js b/src/models/WebSocketModel.js
index 43336e4e53174133513d876b042d337f7695fde4..7114a60dd502765732590ef3baf64529cf78a7a7 100644
--- a/src/models/WebSocketModel.js
+++ b/src/models/WebSocketModel.js
@@ -2,6 +2,50 @@ const { WebSocketServer } = require("ws");
const gameModule = require("../game/game.js");
class WebSocketModel {
+ createInterval(game) {
+ setInterval(() => {
+ if (!this.games[game].started) return;
+ let deadPlayers = [];
+
+ [this.games[game].gameBoard, deadPlayers] = gameModule.moveOneStep(
+ this.games[game].gameBoard,
+ );
+
+ if (!this.games[game].elapsedTime) {
+ this.games[game].elapsedTime = 0;
+ }
+ this.games[game].elapsedTime++;
+
+ //Every 10 seconds, generate borders
+ if (this.games[game].elapsedTime % 10 === 0) {
+ this.games[game].gameBoard = gameModule.applyBorders(
+ this.games[game].gameBoard,
+ this.games[game].borderCounter,
+ );
+ this.games[game].borderCounter++;
+ }
+
+ if (deadPlayers.length > 0) {
+ for (let conn of this.games[game].players) {
+ conn.send(
+ JSON.stringify({
+ type: "deadPlayers",
+ data: deadPlayers,
+ }),
+ );
+ }
+ }
+
+ for (let conn of this.games[game].players) {
+ conn.send(
+ JSON.stringify({
+ type: "gameBoard",
+ data: this.games[game].gameBoard, // YANG: gameModule.getPlayerView()...
+ }),
+ );
+ }
+ }, 1000);
+ }
constructor() {
this.connections = [];
this.games = {};
@@ -34,37 +78,7 @@ class WebSocketModel {
this.onConnection();
for (let game in this.games) {
- setInterval(() => {
- if (!this.games[game].started) return;
-
- this.games[game].gameBoard = gameModule.moveOneStep(
- this.games[game].gameBoard,
- );
-
- if (!this.games[game].elapsedTime) {
- this.games[game].elapsedTime = 0;
- }
-
- this.games[game].elapsedTime++;
-
- //Every 10 seconds, generate borders
- if (this.games[game].elapsedTime % 10 === 0) {
- this.games[game].gameBoard = gameModule.applyBorders(
- this.games[game].gameBoard,
- this.games[game].borderCounter
- );
- this.games[game].borderCounter++;
- }
-
- for (let conn of this.games[game].players) {
- conn.send(
- JSON.stringify({
- type: "gameBoard",
- data: this.games[game].gameBoard, // YANG: gameModule.getPlayerView()...
- }),
- );
- }
- }, 1000);
+ this.createInterval(game);
}
}
@@ -89,6 +103,7 @@ class WebSocketModel {
readyPlayers: 0,
borderCounter: 0,
};
+ this.createInterval(gameId);
}
moveHandler(connection, message) {