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Copy pathflappyBird.js
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131 lines (69 loc) · 2.14 KB
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varcvs=document.getElementById("canvas");
varctx=cvs.getContext("2d");
// load images
varbird=newImage();
varbg=newImage();
varfg=newImage();
varpipeNorth=newImage();
varpipeSouth=newImage();
bird.src="images/bird.png";
bg.src="images/bg.png";
fg.src="images/fg.png";
pipeNorth.src="images/pipeNorth.png";
pipeSouth.src="images/pipeSouth.png";
// some variables
vargap=85;
varconstant;
varbX=10;
varbY=150;
vargravity=1.5;
varscore=0;
// audio files
varfly=newAudio();
varscor=newAudio();
fly.src="sounds/fly.mp3";
scor.src="sounds/score.mp3";
// on key down
document.addEventListener("keydown",moveUp);
functionmoveUp(){
bY-=25;
fly.play();
}
// pipe coordinates
varpipe=[];
pipe[0]={
x : cvs.width,
y : 0
};
// draw images
functiondraw(){
ctx.drawImage(bg,0,0);
for(vari=0;i<pipe.length;i++){
constant=pipeNorth.height+gap;
ctx.drawImage(pipeNorth,pipe[i].x,pipe[i].y);
ctx.drawImage(pipeSouth,pipe[i].x,pipe[i].y+constant);
pipe[i].x--;
if(pipe[i].x==125){
pipe.push({
x : cvs.width,
y : Math.floor(Math.random()*pipeNorth.height)-pipeNorth.height
});
}
// detect collision
if(bX+bird.width>=pipe[i].x&&bX<=pipe[i].x+pipeNorth.width&&(bY<=pipe[i].y+pipeNorth.height||bY+bird.height>=pipe[i].y+constant)||bY+bird.height>=cvs.height-fg.height){
location.reload();// reload the page
}
if(pipe[i].x==5){
score++;
scor.play();
}
}
ctx.drawImage(fg,0,cvs.height-fg.height);
ctx.drawImage(bird,bX,bY);
bY+=gravity;
ctx.fillStyle="#000";
ctx.font="20px Verdana";
ctx.fillText("Score : "+score,10,cvs.height-20);
requestAnimationFrame(draw);
}
draw();