window.addEventListener("keydown",function Keydown(e) {
if (e.keyCode==37||e.keyCode==65) {
for (i=0;i<16;i++) {
if(move(currentElement,[-1,0])){break};
}
}
else if (e.keyCode==38||e.keyCode==87) {
for (i=0;i<16;i++) {
if(move(currentElement,[0,1])){break};
}
}
else if (e.keyCode==39||e.keyCode==68) {
for (i=0;i<16;i++) {
if(move(currentElement,[1,0])){break};
}
}
else if (e.keyCode==40||e.keyCode==83) {
for (i=0;i<16;i++) {
if(move(currentElement,[0,-1])){break};
}
}
return 0;
}
);
function move(element,direction) {
let newX=element.x+direction[0];
let newY=element.y+direction[1];
for (let Obj of Objects) {
if (element!==Obj) {
if (newX>=0&&newY>=0&&(newX+element.width)<=world.width&&(newY+element.height)<=world.height&&(newX>=(Obj.x+Obj.width)||newY>=(Obj.y+Obj.height)||(newX+element.width)<=Obj.x||(newY+element.height)<=Obj.y)) {
element.x=newX;
element.y=newY;
element.setPosition();
break;
} else if (newX<=0&&direction[1]==0) {console.log("Off the world to the left")}
else if (newY<=0&&direction[0]==0) {console.log("Off the world to the bottom")}
else if ((newX+element.width)>=world.width&&direction[1]==0) {console.log("Off the world to the right")}
else if ((newY+element.height)>=world.height&&direction[0]==0) {console.log("Off the world to the top")}
else if (newX<=(Obj.x+Obj.width)) {console.log("Hitting to the right:",Obj)}
else if (newY<=(Obj.y+Obj.height)) {console.log("Hitting to the top:",Obj)}
else if ((newX+element.width)>=Obj.x) {console.log("Hitting to the left:",Obj)}
else if ((newY+element.height)>=Obj.y) {console.log("Hitting to the bottom:",Obj)}
return 1
}
}
return 0;
}
function CreateObject(element,x,y) {
const Hitbox={
"class":element.className,
"x":x,
"y":y,
"width":element.offsetWidth,
"height":element.offsetHeight,
"setPosition":function(){element.style.left=this.x+"px";element.style.bottom=this.y+"px";},
}
Hitbox.setPosition();
Objects.push(Hitbox);
return Hitbox;
}
const world={
"width":document.getElementById("world").offsetWidth,
"height":document.getElementById("world").offsetHeight
};
Objects=[];
const player=[
CreateObject(document.getElementsByClassName("player")[0],0,0)
];
const brick=[
CreateObject(document.getElementsByClassName("brick")[0],96,0),
CreateObject(document.getElementsByClassName("brick")[1],128,32)
];
const currentElement=player[0];
#world {
position:absolute;
top:0px;
left:0px;
background-color:blue;
width:640px;
height:320px;
}
.player {
position:absolute;
background-color:red;
width:32px;
height:32px;
}
.brick {
position:absolute;
background-color:yellow;
width:32px;
height:32px;
}
<body>
<div id="world">
<div class="player"></div>
<div class="brick"></div>
<div class="brick"></div>
</div>
<script src="./js/physics.js"></script>
</body>