html5冠状病毒射击小游戏

寻梦xunm| 629| 收集

3年前

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本文最后更新于2021年08月12日，已超过1197天没有更新，若内容或图片失效，请留言反馈。

html代码：

 <canvas id='canvas' width='1280' height='720'></canvas>

css代码：

body {
    background:#111;
    margin:0;
    padding:0
}
canvas {
    background:#000;
    display:block;
    cursor:none
}

js代码：

"use strict"
        var stage = {
            w:1280,
            h:720
        }

        var _pexcanvas = document.getElementById("canvas");
        _pexcanvas.width = stage.w;
        _pexcanvas.height = stage.h;
        var ctx = _pexcanvas.getContext("2d");




        var pointer = {
            x:stage.w/2,
            y:stage.h/4
        }

        var scale = 1;
        var portrait = true;
        var loffset = 0;
        var toffset = 0;
        var mxpos = 0;
        var mypos = 0;


// ------------------------------------------------------------------------------- Gamy

var againprog = 0;

var healthprog = 0;


function newGame() {
    score = 0;
    health = 100;
    enemies=[];
    enemies.push(new Enemy());
    enemies.push(new Enemy());
    enemies.push(new Enemy());
    againprog = 0;
}



function drawHeart(x,y,w) {
    ctx.beginPath();
    ctx.arc(x-w/4, y, w/4, 0.75*Math.PI,0);
    ctx.arc(x+w/4, y, w/4, 1*Math.PI, 2.25*Math.PI);
    ctx.lineTo(x,y+w/1.5);
    ctx.closePath();
    ctx.fill();
}


var Cannon = function(x,y,tx,ty) {
    this.x = x;
    this.y = y;
    this.tx = tx;
    this.ty = ty;
    this.r = 10;
}

var cannons = [];

var gameover = false;

cannons.push(new Cannon(stage.w,stage.h,stage.w/2,stage.h/2));

var firetm = 0;
var fireact = true;

var health = 100;
var score = 0;


var arm = {x:stage.w,y:stage.h};
var arm2 = {x:0,y:stage.h};
var danger = false;
var dangera = 0;



var Enemy = function() {
    this.x = stage.w/2;
    this.y = stage.h/2;
    this.r = 10;
    this.tx = Math.floor(Math.random()*stage.w);
    this.ty = Math.floor(Math.random()*stage.h);
    this.des = false;
    this.eyeX = 0.4;
    this.eyeY = 0.25;
    this.eyeR = 0.25;
    this.sp = 50;
    this.spl = 1.4;
    this.op=1;
    this.danger = false;
    this.nuked = false;
}

var enemies = [];
// for (var i = 0; i < 10; i++) {
//     enemies[i] = new Enemy();
// }
        enemies.push(new Enemy());
        enemies.push(new Enemy());
        enemies.push(new Enemy());

var entm = 0;
var ga =0;

var steptime = 0;


var Star = function() {
    this.a = Math.random()*Math.PI*2;
    this.v = 3+Math.random()*5;
    this.x = stage.w/2;
    this.y = stage.h/2;
    this.r = 0.2;
}

var Power = function() {
    this.type = Math.floor(Math.random()*2)+1;
    this.a = Math.random()*Math.PI*2;
    this.v = 3+Math.random()*5;
    this.x = stage.w/2;
    this.y = stage.h/2;
    this.r = 0.2;
    this.dis = false;
    this.op = 1;
}


var powers = [];
var powertm = 0;
var powermax = Math.random()*800+300;
// powermax = 10;

var stars = [];

for (var i =0;i<200;i++) {
    stars[i] = new Star();
    var st = stars[i];
    var move = Math.random()*400;

    st.x += Math.sin(st.a)*move;
    st.y += Math.cos(st.a)*move;


}

// powers.push(new Power());



function enginestep() {
    steptime = Date.now();
    ctx.clearRect(0,0,stage.w,stage.h);
    
    ctx.fillStyle = "#ffffff";

    
    for (var i = 0; i < stars.length; i++) {
        var st = stars[i];

        st.x += Math.sin(st.a)*st.v;
        st.y += Math.cos(st.a)*st.v;
        st.r += st.v/200;

        ctx.beginPath();
        ctx.arc(st.x,st.y, st.r, 2*Math.PI, 0);
        ctx.fill();

        if (st.x>stage.w||st.x<0||st.y<0||st.y>stage.h) {
            stars[i] = new Star();
        }
    }
    if (!gameover) {
        danger = false;


        powertm++;
        if (powertm>powermax) {
            powers.push(new Power());
            powertm = 0;
            powermax = Math.random()*1200+600;
            // powermax = 10;
        }




        for (var i = 0; i < powers.length; i++) {
            var st = powers[i];

            if (!st.des) {
                st.x += Math.sin(st.a)*st.v/1.5;
                st.y += Math.cos(st.a)*st.v/1.5;
                st.r += st.v/15;
            } else {
                st.r *=1.1;
                if (st.type==1) {
                st.op += (0-st.op)/10;
            } else {
                st.op += (0-st.op)/20;

            }
                st.x += (stage.w/2-st.x)/10;
                st.y += (stage.h/2-st.y)/10;

            }

            
            if (st.type ==1) {
                ctx.fillStyle = "rgba(255,0,0,"+st.op+")";

                drawHeart(st.x,st.y-st.r/4, st.r*2);

            } else {
                ctx.fillStyle = "rgba(255,255,0,"+st.op+")";
                ctx.strokeStyle = "rgba(255,255,0,"+st.op+")";
                ctx.lineWidth = st.r/10;
                ctx.beginPath();
                ctx.arc(st.x,st.y, st.r, 2*Math.PI, 0);
                ctx.stroke();

                ctx.beginPath();
                ctx.arc(st.x,st.y, st.r*0.15, 2*Math.PI, 0);
                ctx.fill();


                ctx.beginPath();
                ctx.arc(st.x,st.y, st.r*0.85, 1.67*Math.PI, 2*Math.PI);
                ctx.arc(st.x,st.y, st.r*0.25, 2*Math.PI, 1.67*Math.PI,true);

                ctx.closePath();
                ctx.fill();



                ctx.beginPath();
                ctx.arc(st.x,st.y, st.r*0.85, 3*Math.PI, 3.33*Math.PI);
                ctx.arc(st.x,st.y, st.r*0.25, 3.33*Math.PI,3*Math.PI, true);
                ctx.closePath();
                ctx.fill();

                ctx.beginPath();
                ctx.arc(st.x,st.y, st.r*0.85, 2.33*Math.PI, 2.67*Math.PI);
                ctx.arc(st.x,st.y, st.r*0.25, 2.67*Math.PI,2.33*Math.PI, true);
                ctx.lineTo(st.x,st.y);
                ctx.closePath();
                ctx.fill();

            }
            if (st.x>stage.w||st.x<0||st.y<0||st.y>stage.h||st.r>stage.w/2) {
                powers.splice(i,1);
                if (st.type == 2&&st.r>stage.w/2) {
                    for (var e = 0; e < enemies.length; e++) {
                        enemies[e].des = true;
                        enemies[e].nuked = true;

                    }
                }
                i--;
            }


        }

        entm++;
        if (enemies.length<10&&entm>300) {
            entm=0;
            enemies.push(new Enemy());

        }

            ctx.lineWidth = 2;
        for (var i = 0; i < enemies.length; i++) {
            var en = enemies[i];
            if (!en.danger) {
                ctx.strokeStyle = "rgba(0,255,255,"+en.op*2+")";
            } else {
                health -= 0.01;
                ctx.strokeStyle = "rgba(255,0,0,"+en.op*2+")";
                danger = true;
            }




            if (!en.des) {

                if (en.danger) {
                    var randx = Math.floor(Math.random()*4)-2;
                    var randy = Math.floor(Math.random()*4)-2;

                    en.x = en.tx+randx;
                    en.y = en.ty+randy;
                } else {
                    en.x += (en.tx-en.x)/100;
                    en.y += (en.ty-en.y)/100;
                    var randx = 0;
                    var randy = 0;
                }

                en.r += (50-en.r)/100;
                if (Math.abs(50-en.r)<2&&!en.danger) {
                    en.tx=en.x;
                    en.ty=en.y;
                    en.danger=true;
                }
                ctx.beginPath();
                ctx.arc(en.x-en.r*en.eyeX,en.y-en.r*en.eyeY, en.r*en.eyeR, 0, 2*Math.PI);
                ctx.stroke();
                ctx.beginPath();
                ctx.arc(en.x+en.r*en.eyeX,en.y-en.r*en.eyeY, en.r*en.eyeR, 0, 2*Math.PI);
                ctx.stroke();

                ctx.beginPath();
                ctx.arc(en.x,en.y+en.r/4, en.r/3, 2*Math.PI, Math.PI);
                ctx.stroke();

                ctx.beginPath();
                ctx.arc(en.x,en.y, en.r, 0, 2*Math.PI);
                ctx.stroke();
            } else {

                en.eyeR += (0.5-en.eyeR)/5;
                en.op += (0-en.op)/5;
                // en.sp += (5-en.sp)/20;
                en.r += (100-en.r)/20;
                en.spl += (2.5-en.spl)/5;
                ctx.beginPath();
                ctx.arc(en.x-en.r*en.eyeX,en.y-en.r*en.eyeY, en.r*en.eyeR, 0, 2*Math.PI);
                ctx.stroke();
                ctx.beginPath();
                ctx.arc(en.x+en.r*en.eyeX,en.y-en.r*en.eyeY, en.r*en.eyeR, 0, 2*Math.PI);
                ctx.stroke();
                ctx.beginPath();
                ctx.arc(en.x,en.y+en.r/2, en.r*en.eyeR, Math.PI,2*Math.PI);
                ctx.stroke();

            ctx.beginPath();
            ctx.arc(en.x,en.y, en.r, 0, 2*Math.PI);
            ctx.stroke();
            }

            //spikes
            for (var s = 0; s < 12; s++) {
                var a = (Math.PI*2/12)*s+ga;
                ctx.beginPath();
                ctx.moveTo(en.x+Math.sin(a)*en.r,en.y+Math.cos(a)*en.r);
                ctx.lineTo(en.x+Math.sin(a)*en.r*1.2,en.y+Math.cos(a)*en.r*1.2);
                ctx.lineTo(en.x+Math.sin(a+Math.PI/en.sp)*en.r*en.spl,en.y+Math.cos(a+Math.PI/en.sp)*en.r*en.spl);
                ctx.lineTo(en.x+Math.sin(a-Math.PI/en.sp)*en.r*en.spl,en.y+Math.cos(a-Math.PI/en.sp)*en.r*en.spl);
                ctx.lineTo(en.x+Math.sin(a)*en.r*1.2,en.y+Math.cos(a)*en.r*1.2);
                ctx.stroke();
                // ctx.fill();
            }

            if (Math.abs(0.5-en.eyeR)<0.01) {
                var rand = Math.floor(Math.random()*2);
                if (enemies[i].nuked&&rand==1) {
                enemies.splice(i,1);

                } else {
                enemies[i] = new Enemy();

                }
            }
        }







        if (danger) {
            dangera += 0.05+(100-health)/1000;
            if (dangera>=Math.PI) {
                dangera=0;
            }
            ctx.fillStyle='rgba(255,0,0,'+(1-Math.sin(dangera))/4+')';
            ctx.fillRect(0,0,stage.w,stage.h);
            if (health<10) {
                ctx.fillStyle='rgba(255,255,0,'+(Math.sin(dangera))+')';
                ctx.strokeStyle='rgba(255,255,0,'+(Math.sin(dangera))+')';

                ctx.lineWidth = 10;
                ctx.beginPath();
                ctx.lineJoin = 'round';
                ctx.moveTo(stage.w/2,stage.h/4);
                ctx.lineTo(stage.w/2+stage.h/7,stage.h/2);
                ctx.lineTo(stage.w/2-stage.h/7,stage.h/2);
                ctx.closePath();
                ctx.stroke();

                ctx.font = "bold 130px arial";
                ctx.textAlign = "center"; 
                ctx.textBaseline = "middle"; 
                ctx.fillText("!",stage.w/2,stage.h/2.5);

                ctx.font = "bold 50px arial";
                ctx.fillText("LOW HEALTH",stage.w/2,stage.h*0.6);
            }
        } else {
            dangera = 0;
        }

        healthprog += (health-healthprog)/5;
        ctx.fillStyle='#00ffff';
        ctx.font = "30px arial";
        ctx.textAlign = "left"; 
        ctx.textBaseline = "middle"; 
        ctx.fillText("Health: ",20,40);

        ctx.fillText("Score: "+score,stage.w-200,40);
        // ctx.fillText("Step:   "+(Date.now()-steptime),20,120);
        if (health>30) {
            ctx.fillStyle='rgba(0,255,255,0.8)';
        } else {
            ctx.fillStyle='rgba(255,0,0,0.8)';
        }
        ctx.lineWidth = 2;
        ctx.fillRect(130,25,healthprog*3,30);
        ctx.strokeStyle = "#00ffff";
        ctx.strokeRect(130,25,300,30);
        
        if (health<0) {
            gameover = true;
        }

    } else {    


        ctx.fillStyle='rgba(0,255,255,0.3)';
        ctx.fillRect((stage.w-220)/2,stage.h*0.65-25,againprog,50);

        ctx.fillStyle='#00ffff';
        ctx.font = "bold 130px arial";
        ctx.textAlign = "center"; 
        ctx.textBaseline = "middle"; 
        ctx.fillText("GAME OVER",stage.w/2,stage.h/3);
        ctx.font = "bold 50px arial";
        ctx.fillText("SCORE: "+score,stage.w/2,stage.h/2);

        ctx.font = "bold 30px arial";

        ctx.fillText("PLAY AGAIN",stage.w/2,stage.h*0.65);
        ctx.strokeRect((stage.w-220)/2,stage.h*0.65-25,220,50);

        againprog += (0-againprog)/50;

    }

        ctx.strokeStyle = "#00ffff";
        ctx.fillStyle = "#00ffff";
            ctx.lineWidth = 2;
        if (fireact) {
            firetm++;
            if(firetm>5) {

                cannons.push(new Cannon(pointer.x+(stage.w-pointer.x)/2.5,pointer.y+(stage.h-pointer.y)/2.5,pointer.x,pointer.y));
                cannons.push(new Cannon(pointer.x-(pointer.x)/2.5,pointer.y+(stage.h-pointer.y)/2.5,pointer.x,pointer.y));


                firetm=0;
            }

            arm.x=Math.floor(Math.random()*50)-25+stage.w;
            arm.y=Math.floor(Math.random()*50)-25+stage.h;
            arm2.x=Math.floor(Math.random()*30)-15;
            arm2.y=Math.floor(Math.random()*30)-15+stage.h;
        } else {
            arm.x=stage.w;
            arm.y=stage.h;
            arm2.x=0;
            arm2.y=stage.h;
        }






        for (var i = 0; i < cannons.length; i++) {
            
            var can = cannons[i];

            can.x += (can.tx-can.x)/5;
            can.y += (can.ty-can.y)/5;
            can.r += (0-can.r)/5;

            ctx.beginPath();
            ctx.arc(can.x,can.y, can.r, 0, 2*Math.PI);
            ctx.fill();


            if (can.r<2&&!gameover) {
                for (var a = 0; a < enemies.length; a++) {
                    var en = enemies[a];
                    var dx = can.x-en.x;
                    var dy = can.y-en.y;
                    var dis = dx*dx+dy*dy;
                    if (dis<en.r*en.r) {

                        // enemies.splice(a,1);
                        if (!enemies[a].des) {
                        enemies[a].des = true;

                        score+=10;

                        }
                    }

                }
                
            }

            if (can.r<1&&!gameover) {
                for (var a = 0; a < powers.length; a++) {
                    var en = powers[a];
                    var dx = can.x-en.x;
                    var dy = can.y-en.y;
                    var dis = dx*dx+dy*dy;
                    if (dis<en.r*en.r) {

                        if (!en.des) {
                            powers[a].des = true;
                            if (en.type==1) {
                            health = 100;
                            }

                        }
                    }

                }

            }

            if (can.r<1&&gameover) {

                if (can.x>(stage.w-220)/2&&can.y>stage.h*0.65-25&&can.x<(stage.w-220)/2+220&&can.y<stage.h*0.65-25+50) {

                    againprog +=1;
                    if (againprog>220) {
                        newGame();
                        gameover = false;
                    }
                }
            }
            if (Math.abs(can.tx-can.x)<1) {




                cannons.splice(i,1);
            }


        
        }
        ctx.beginPath();
        ctx.moveTo(pointer.x-20,pointer.y);
        ctx.lineTo(pointer.x+20,pointer.y);
        ctx.stroke();

        ctx.beginPath();
        ctx.moveTo(pointer.x,pointer.y-20);
        ctx.lineTo(pointer.x,pointer.y+20);
        ctx.stroke();

            ctx.beginPath();
            ctx.arc(pointer.x,pointer.y, 8, 0, 2*Math.PI);
            ctx.stroke();

        ctx.beginPath();
        ctx.moveTo(pointer.x+(arm.x-pointer.x)/3,pointer.y+(arm.y-pointer.y)/3+10);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/2.5,pointer.y+(arm.y-pointer.y)/2.5+10);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/2,pointer.y+(arm.y-pointer.y)/2+10);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/1.5,pointer.y+(arm.y-pointer.y)/1.5+50);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/1.2,pointer.y+(arm.y-pointer.y)/1.2+80);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/1.1,pointer.y+(arm.y-pointer.y)/1.1+100);
        ctx.stroke();
        ctx.beginPath();
        ctx.moveTo(pointer.x+(arm.x-pointer.x)/3-10,pointer.y+(arm.y-pointer.y)/3);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/2.5-10,pointer.y+(arm.y-pointer.y)/2.5);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/2-10,pointer.y+(arm.y-pointer.y)/2);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/1.5-50,pointer.y+(arm.y-pointer.y)/1.5);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/1.2-80,pointer.y+(arm.y-pointer.y)/1.2);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/1.1-100,pointer.y+(arm.y-pointer.y)/1.1);
        ctx.stroke();

        ctx.beginPath();
        ctx.moveTo(pointer.x+(arm.x-pointer.x)/3,pointer.y+(arm.y-pointer.y)/3-10);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/2.5,pointer.y+(arm.y-pointer.y)/2.5-10);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/2,pointer.y+(arm.y-pointer.y)/2-10);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/1.5,pointer.y+(arm.y-pointer.y)/1.5-50);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/1.2,pointer.y+(arm.y-pointer.y)/1.2-80);
        ctx.lineTo(pointer.x+(arm.x-pointer.x)/1.1,pointer.y+(arm.y-pointer.y)/1.1-100);
        ctx.stroke();



        ctx.beginPath();
        ctx.moveTo(arm2.x+pointer.x-(pointer.x)/3,pointer.y+(arm2.y-pointer.y)/3+10);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/2.5,pointer.y+(arm2.y-pointer.y)/2.5+10);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/2,pointer.y+(arm2.y-pointer.y)/2+10);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/1.5,pointer.y+(arm2.y-pointer.y)/1.5+50);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/1.2,pointer.y+(arm2.y-pointer.y)/1.2+80);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/1.1,pointer.y+(arm2.y-pointer.y)/1.1+100);
        ctx.stroke();

        ctx.beginPath();
        ctx.moveTo(arm2.x+pointer.x-(pointer.x)/3-10,pointer.y+(arm2.y-pointer.y)/3);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/2.5-10,pointer.y+(arm2.y-pointer.y)/2.5);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/2-10,pointer.y+(arm2.y-pointer.y)/2);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/1.5-50,pointer.y+(arm2.y-pointer.y)/1.5);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/1.2-80,pointer.y+(arm2.y-pointer.y)/1.2);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/1.1-100,pointer.y+(arm2.y-pointer.y)/1.1);
        ctx.stroke();

        ctx.beginPath();
        ctx.moveTo(arm2.x+pointer.x-(pointer.x)/3,pointer.y+(arm2.y-pointer.y)/3-10);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/2.5,pointer.y+(arm2.y-pointer.y)/2.5-10);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/2,pointer.y+(arm2.y-pointer.y)/2-10);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/1.5,pointer.y+(arm2.y-pointer.y)/1.5-50);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/1.2,pointer.y+(arm2.y-pointer.y)/1.2-80);
        ctx.lineTo(arm2.x+pointer.x-(pointer.x)/1.1,pointer.y+(arm2.y-pointer.y)/1.1-100);
        ctx.stroke();




        ctx.beginPath();
        ctx.arc(pointer.x+(arm.x-pointer.x)/3,pointer.y+(arm.y-pointer.y)/3, 10, 0, 2*Math.PI);
        ctx.arc(pointer.x+(arm.x-pointer.x)/2.5,pointer.y+(arm.y-pointer.y)/2.5, 10, 0, 2*Math.PI);
        ctx.arc(pointer.x+(arm.x-pointer.x)/2,pointer.y+(arm.y-pointer.y)/2, 10, 0, 2*Math.PI);
        ctx.arc(pointer.x+(arm.x-pointer.x)/1.5,pointer.y+(arm.y-pointer.y)/1.5, 50, 0, 2*Math.PI);
        ctx.arc(pointer.x+(arm.x-pointer.x)/1.2,pointer.y+(arm.y-pointer.y)/1.2, 80, 0, 2*Math.PI);
        ctx.arc(pointer.x+(arm.x-pointer.x)/1.1,pointer.y+(arm.y-pointer.y)/1.1, 100, 0, 2*Math.PI);
        ctx.stroke();

        
        ctx.beginPath();
        ctx.arc(arm2.x+pointer.x-(pointer.x/3),pointer.y+(arm2.y-pointer.y)/3, 10, 0, 2*Math.PI);
        ctx.arc(arm2.x+pointer.x-(pointer.x/2.5),pointer.y+(arm2.y-pointer.y)/2.5, 10, 0, 2*Math.PI);
        ctx.arc(arm2.x+pointer.x-(pointer.x)/2,pointer.y+(arm2.y-pointer.y)/2, 10, 0, 2*Math.PI);
        ctx.arc(arm2.x+pointer.x-(pointer.x)/1.5,pointer.y+(arm2.y-pointer.y)/1.5, 50, 0, 2*Math.PI);
        ctx.arc(arm2.x+pointer.x-(pointer.x)/1.2,pointer.y+(arm2.y-pointer.y)/1.2, 80, 0, 2*Math.PI);
        ctx.arc(arm2.x+pointer.x-(pointer.x)/1.1,pointer.y+(arm2.y-pointer.y)/1.1, 100, 0, 2*Math.PI);
        ctx.stroke();


        ctx.fillStyle='#004444';
        ctx.font = "14px arial";
        ctx.textAlign = "center"; 
        ctx.textBaseline = "middle"; 
        ctx.fillText("Coronavirus Shooting Game, Designed & Developed by Faisal Jawed",stage.w/2,stage.h-20);
}



// ------------------------------------------------------------------------------- events
// ------------------------------------------------------------------------------- events
// ------------------------------------------------------------------------------- events
// ------------------------------------------------------------------------------- events

function toggleFullScreen() {
    var doc = window.document;
    var docEl = doc.documentElement;

    var requestFullScreen = docEl.requestFullscreen || docEl.mozRequestFullScreen || docEl.webkitRequestFullScreen || docEl.msRequestFullscreen;
    var cancelFullScreen = doc.exitFullscreen || doc.mozCancelFullScreen || doc.webkitExitFullscreen || doc.msExitFullscreen;

    if(!doc.fullscreenElement && !doc.mozFullScreenElement && !doc.webkitFullscreenElement && !doc.msFullscreenElement) {
        requestFullScreen.call(docEl);

    }
    else {
        cancelFullScreen.call(doc);

    }
}


var ox = 0;
var oy = 0;
function mousestart(e) {
    mxpos = (e.pageX-loffset)*scale;
    mypos = (e.pageY-toffset)*scale;
    pointer.x = mxpos;
    pointer.y = mypos;

// fireact = true;



}
function mousemove(e) {
    mxpos = (e.pageX-loffset)*scale;
    mypos = (e.pageY-toffset)*scale;
    pointer.x = mxpos;
    pointer.y = mypos;

    // ball.vY += (mxpos-ox)/15*line.d;

    ox = mxpos;
}

function mouseend(e) {
// fireact = false;

}

var moveX = 0;
var moveY = 0;
var moveZ = 0;


function keydowned(e) {
    // if (e.keyCode==65) {
    //     moveX = 10;
    // } else if (e.keyCode==68) {
    //     moveX = -10;
    // }
    // if (e.keyCode==83) {
    //     moveY = -10;
    // } else if (e.keyCode==87) {
    //     moveY = 10;
    // }

    // if (e.keyCode==69) {
    //     moveZ = 10;
    // } else if (e.keyCode==81) {
    //     moveZ = -10;
    // }
    // console.log(e.keyCode);
}



function keyuped(e) {
    // if (e.keyCode==65) {
    //     moveX = 0;
    // } else if (e.keyCode==68) {
    //     moveX = 0;
    // }
    // if (e.keyCode==87) {
    //     moveY = 0;
    // } else if (e.keyCode==83) {
    //     moveY = 0;
    // }
    // if (e.keyCode==81) {
    //     moveZ = 0;
    // } else if (e.keyCode==69) {
    //     moveZ = 0;
    // }
    // console.log("u"+e.keyCode);
}



window.addEventListener('mousedown', function(e) {
    mousestart(e);
}, false);
window.addEventListener('mousemove', function(e) {
    mousemove(e);
}, false);
window.addEventListener('mouseup', function(e) {
    mouseend(e);
}, false);
window.addEventListener('touchstart', function(e) {
    e.preventDefault();
    mousestart(e.touches[0]);
}, false);
window.addEventListener('touchmove', function(e) {
    e.preventDefault();
    mousemove(e.touches[0]);
}, false);
window.addEventListener('touchend', function(e) {
    e.preventDefault();
    mouseend(e.touches[0]);
}, false);


window.addEventListener('keydown', function(e) {
    keydowned(e);
}, false);
window.addEventListener('keyup', function(e) {
    keyuped(e);
}, false);

// ------------------------------------------------------------------------ stager
// ------------------------------------------------------------------------ stager
// ------------------------------------------------------------------------ stager
// ------------------------------------------------------------------------ stager
function _pexresize() {
    var cw = window.innerWidth;
    var ch = window.innerHeight;
    if (cw<=ch*stage.w/stage.h) {
        portrait = true;
        scale = stage.w/cw;
        loffset = 0;
        toffset = Math.floor(ch-(cw*stage.h/stage.w))/2;
        _pexcanvas.style.width = cw + "px";
        _pexcanvas.style.height = Math.floor(cw*stage.h/stage.w) + "px";
    } else {
        scale = stage.h/ch;
        portrait = false;
        loffset = Math.floor(cw-(ch*stage.w/stage.h))/2;
        toffset = 0;
        _pexcanvas.style.height = ch + "px";
        _pexcanvas.style.width = Math.floor(ch*stage.w/stage.h) + "px";
    }
    _pexcanvas.style.marginLeft = loffset +"px";
    _pexcanvas.style.marginTop = toffset +"px";
}


window.requestAnimFrame = (function(){
    return  window.requestAnimationFrame       ||
    window.webkitRequestAnimationFrame ||
    window.mozRequestAnimationFrame    ||
    window.oRequestAnimationFrame      ||
    window.msRequestAnimationFrame     ||
    function( callback ){
        window.setTimeout(callback, 1000 / 60);
    };})();



    var fps = 60;


    var nfcount = 0;

function animated() {
    requestAnimFrame(animated);
    enginestep();

       nfcount++;
    ctx.fillStyle='#00ffff';
    ctx.font = "12px arial";
    ctx.textAlign = "left"; 
    ctx.fillText("FPS: "+Math.floor(fps),10,stage.h-20);
}

_pexresize();
animated();


function countfps() {
    fps = nfcount;
    nfcount = 0;
}
setInterval(countfps,1000);

游戏射击

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