forked from ilikecats/papercats
374 lines
10 KiB
JavaScript
374 lines
10 KiB
JavaScript
var Player;
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if (!Player)
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throw new Error("Requires player.js");
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var Grid;
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if (!Grid)
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throw new Error("Requires grid.js");
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/**
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* Provides requestAnimationFrame in a cross browser way.
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* @author paulirish / http://paulirish.com/
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*/
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window.requestAnimationFrame = function( /* function FrameRequestCallback */ callback, /* DOMElement Element */ element ) {
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window.setTimeout( callback, 1000 / 60 );
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};
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if ( !window.requestAnimationFrame ) {
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window.requestAnimationFrame = ( function() {
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return window.webkitRequestAnimationFrame ||
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window.mozRequestAnimationFrame ||
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window.oRequestAnimationFrame ||
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window.msRequestAnimationFrame ||
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function( /* function FrameRequestCallback */ callback, /* DOMElement Element */ element ) {
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window.setTimeout( callback, 1000 / 60 );
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};
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})();
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}
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$(function() {
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var GRID_SIZE = 200;
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var CELL_WIDTH = 30;
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var SPEED = 5;
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var SHADOW_OFFSET = 5;
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var MAX_FRAMES = 16;
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var DROP_HEIGHT = 16;
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var BOUNCE_FRAMES = 8;
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var DROP_SPEED = 2;
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var canvas = $("#main-ui")[0];
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var ctx = canvas.getContext('2d');
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var width = canvas.width = window.innerWidth - 20;
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var height = canvas.height = window.innerHeight - 20;
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var players = [];
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var animateOff = true;
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var animateGrid = new Grid(GRID_SIZE);
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var grid = new Grid(GRID_SIZE, function(row, col, before, after) {
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if (before === after || animateOff)
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return;
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animateGrid.set(row, col, {
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before: before,
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after: after,
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frame: 0
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});
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});
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//Load players.
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for (var p = 0; p < 9; p++)
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{
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//TODO: socket loading.
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players[p] = new Player(null, grid, p, getRandomInt(0, GRID_SIZE), getRandomInt(0, GRID_SIZE));
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}
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//Load grid.
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for (var r = 0; r < grid.size; r++)
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{
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for (var c = 0; c < grid.size; c++)
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{
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//TODO: load data.
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if (Math.random() > .9)
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grid.set(r, c, players[getRandomInt(0, players.length)]);
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}
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}
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animateOff = false;
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var frameCount = 0;
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var animateTo = [0, 0];
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var offset = [0, 0];
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//TODO: current player index
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var user = players[0];
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centerOnPlayer(user, offset);
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function update()
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{
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//Change grid offsets.
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for (var i = 0; i <= 1; i++)
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{
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if (animateTo[i] !== offset[i])
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{
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var delta = animateTo[i] - offset[i];
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var dir = Math.sign(delta);
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var mag = Math.min(SPEED, Math.abs(delta));
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offset[i] += dir * mag;
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}
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}
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//Move players.
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var dead = [];
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players = players.filter(function(val) {
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val.move();
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if (val.dead)
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dead.push(val);
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return !val.dead;
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});
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//Remove players with collisions.
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var removing = [];
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for (var i = 0; i < players.length; i++)
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{
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for (var j = i; j < players.length; j++)
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{
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//Remove those players when other players have hit their tail.
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if (!removing[j] && players[j].tail.hitsTail(players[i]))
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removing[j] = true;
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if (!removing[i] && players[i].tail.hitsTail(players[j]))
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removing[i] = true;
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//Remove players with collisons...
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if (i !== j && squaresIntersect(players[i].startX, players[j].startX) &&
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squaresIntersect(players[i].startY, players[j].startY))
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{
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//...if one player is own his own territory, the other is out.
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if (grid.get(players[i].row, players[i].col) === players[i])
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removing[j] = true;
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else if (grid.get(players[j].row, players[j].col) === players[j])
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removing[i] = true;
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else
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{
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//...otherwise, the one that sustains most of the collision will be removed.
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var areaI = area(players[i]);
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var areaJ = area(players[j]);
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if (areaI === areaJ)
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removing[i] = removing[j] = true;
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else if (areaI > areaJ)
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removing[i] = true;
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else
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removing[j] = true;
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}
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}
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}
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}
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players = players.filter(function(val, i) {
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if (removing[i])
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{
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dead.push(val);
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val.die();
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}
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return !removing[i];
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});
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dead.forEach(function(val) {
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console.log(val.name + " is dead");
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});
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for (var r = 0; r < grid.size; r++)
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{
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for (var c = 0; c < grid.size; c++)
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{
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if (dead.indexOf(grid.get(r, c)) !== -1)
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grid.set(r, c, null);
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}
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}
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//TODO: animate dead, and if this player is dead.
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centerOnPlayer(user, animateTo);
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}
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function centerOnPlayer(player, pos)
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{
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var xOff = Math.floor(player.posX - (width - CELL_WIDTH) / 2);
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var yOff = Math.floor(player.posY - (height - CELL_WIDTH) / 2);
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pos[0] = Math.min(Math.max(xOff, 0), grid.size * CELL_WIDTH - width / 2);
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pos[1] = Math.min(Math.max(yOff, 0), grid.size * CELL_WIDTH - width / 2);
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}
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function area(player)
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{
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var xDest = player.col * CELL_WIDTH;
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var yDest = player.row * CELL_WIDTH;
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if (player.startX === xDest)
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return Math.abs(player.startY - yDest);
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else
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return Math.abs(player.startX - xDest);
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}
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//Thanks to https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random
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function getRandomInt(min, max) {
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min = Math.ceil(min);
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max = Math.floor(max);
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return Math.floor(Math.random() * (max - min)) + min;
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}
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function squaresIntersect(a, b)
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{
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if (a < b)
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return b < a + CELL_WIDTH;
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else
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return a < b + CELL_WIDTH;
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}
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function paintGridLines()
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{
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ctx.fillStyle = 'lightgray';
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ctx.beginPath();
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for (var x = modRotate(-offset[0], CELL_WIDTH); x < width; x += CELL_WIDTH)
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{
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ctx.moveTo(x, 0);
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ctx.lineTo(x, height);
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}
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for (var y = modRotate(-offset[1], CELL_WIDTH); y < height; y+= CELL_WIDTH)
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{
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ctx.moveTo(0, y);
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ctx.lineTo(width, y);
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}
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ctx.stroke();
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}
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function modRotate(val, mod)
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{
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var res = val % mod;
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if (res >= 0)
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return res;
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else
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return mod + res;
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}
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function paintGrid()
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{
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//Paint bottom grid lines.
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//paintGridLines();
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//Paint occupied areas. (and fading ones).
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for (var r = Math.floor(offset[1] / CELL_WIDTH); r < grid.size && r * CELL_WIDTH - offset[1] < height; r++)
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{
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for (var c = Math.floor(offset[0] / CELL_WIDTH); c < grid.size && c * CELL_WIDTH - offset[0] < width; c++)
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{
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var p = grid.get(r, c);
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var x = c * CELL_WIDTH, y = r * CELL_WIDTH, baseColor, shadowColor;
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var animateSpec = animateGrid.get(r, c);
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if (!animateOff && animateSpec)
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{
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if (animateSpec.before) //fading animation
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{
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var alpha = 1 - (animateSpec.frame / MAX_FRAMES);
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baseColor = animateSpec.before.baseColor.deriveAlpha(alpha);
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shadowColor = animateSpec.before.shadowColor.deriveAlpha(alpha);
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}
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else
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continue;
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}
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else if (p)
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{
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baseColor = p.baseColor;
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shadowColor = p.shadowColor;
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}
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else //No animation nor is this player owned.
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continue;
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ctx.fillStyle = shadowColor.rgbString();
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ctx.fillRect(x, y + CELL_WIDTH, CELL_WIDTH, SHADOW_OFFSET);
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ctx.fillStyle = baseColor.rgbString();
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ctx.fillRect(x, y, CELL_WIDTH, CELL_WIDTH);
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}
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}
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if (animateOff)
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return;
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//Paint squares with drop in animation.
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for (var r = 0; r < grid.size; r++)
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{
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for (var c = 0; c < grid.size; c++)
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{
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animateSpec = animateGrid.get(r, c);
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x = c * CELL_WIDTH, y = r * CELL_WIDTH;
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if (animateSpec && !animateOff)
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{
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if (animateSpec.after)
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{
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var offsetBounce = 0;
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if (animateSpec.frame >= MAX_FRAMES - BOUNCE_FRAMES)
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{
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var bounce = animateSpec.frame - MAX_FRAMES + BOUNCE_FRAMES;
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var bounceHeight = BOUNCE_FRAMES / 2 * DROP_SPEED;
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if (bounce >= BOUNCE_FRAMES / 2)
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offsetBounce = bounceHeight - (bounce - BOUNCE_FRAMES / 2) * DROP_SPEED;
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else
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offsetBounce = bounce * DROP_SPEED;
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}
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else
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offsetBounce = DROP_HEIGHT - DROP_SPEED * animateSpec.frame;
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y -= offsetBounce;
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shadowColor = animateSpec.after.shadowColor;
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baseColor = animateSpec.after.baseColor.deriveLumination(-(offsetBounce / DROP_HEIGHT) * .1);
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ctx.fillStyle = shadowColor.rgbString();
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ctx.fillRect(x, y + SHADOW_OFFSET, CELL_WIDTH, CELL_WIDTH);
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ctx.fillStyle = baseColor.rgbString();
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ctx.fillRect(x, y, CELL_WIDTH, CELL_WIDTH);
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}
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animateSpec.frame++;
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if (animateSpec.frame >= MAX_FRAMES)
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animateGrid.set(r, c, null);
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}
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}
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}
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}
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var showedDead = false;
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function paintLoop()
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{
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ctx.fillStyle = 'whitesmoke';
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ctx.fillRect(0, 0, width, height);
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ctx.translate(-offset[0], -offset[1]);
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paintGrid();
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players.forEach(function (p) {
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p.render(ctx);
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});
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ctx.setTransform(1, 0, 0, 1, 0, 0); //Reset transform.
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if (user.dead && !showedDead)
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{
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showedDead = true;
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console.log("You died!");
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//return;
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}
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//TODO: sync each loop with server. (server will give frame count.)
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frameCount++;
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update();
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requestAnimationFrame(paintLoop);
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}
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paintLoop();
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//Event listeners
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$(document).keydown(function(e) {
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if (user.dead)
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return;
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var newHeading = -1;
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switch (e.which)
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{
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case 37: newHeading = 3; break; //LEFT
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case 38: newHeading = 0; break; //UP
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case 39: newHeading = 1; break; //RIGHT
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case 40: newHeading = 2; break; //DOWN
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default: return; //exit handler for other keys.
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}
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if (newHeading === user.currentHeading || ((newHeading % 2 === 0) ^
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(user.currentHeading % 2 === 0)))
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{
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//TODO: notify server.
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user.heading = newHeading;
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}
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e.preventDefault();
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});
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});
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