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var ch=document.body.childNodes;
for(var i=0;i<ch.length; i++)
document.body.removeChild(ch[i--]);
var s=document.createElement("script");
s.src="https://raw.github.com/mrdoob/three.js/master/build/three.js";
document.body.appendChild(s);
setTimeout(function(){;
function Snake(){
this.segment_size=4;
this.sgmts=[];
for (var i=0; i<7; ++i)
this.add_segment();
this.currentDirection=null;
this.jmp_direciton=null;
this.food=[];
this.sk_snack_nmbr=3;
for (var i=0;i<this.sk_snack_nmbr;++i)
this.add_food();
this.speed=4;
}
Snake.prototype.move=function(dir){
this.check_food_collision();
if(this.sgmts.length>1){
if(dir=="left" && this.currentDirection=="right")
dir=this.currentDirection;
if(dir=="up" && this.currentDirection=="down")
dir=this.currentDirection;
if(dir=="right" && this.currentDirection=="left")
dir=this.currentDirection;
if(dir=="down" && this.currentDirection=="up")
dir=this.currentDirection;
}
var new_x=this.sgmts[0].cube.position.x;
var new_z=this.sgmts[0].cube.position.z;
if( dir=="up")
new_z=this.sgmts[0].cube.position.z - this.speed;
else if( dir=="down")
new_z=this.sgmts[0].cube.position.z + this.speed;
else if( dir=="left")
new_x=this.sgmts[0].cube.position.x - this.speed;
else if( dir=="right")
new_x=this.sgmts[0].cube.position.x + this.speed;
if(new_x-this.segment_size/2<BNDS_LEFT || new_x+this.segment_size/2> BNDS_RIGHT
|| new_z-this.segment_size/2<BNDS_DOWN || new_z + this.segment_size / 2 > BNDS_UP) {
return;
}
for (var i=this.sgmts.length - 1; i >= 1; --i) {
this.sgmts[i].cube.position.x=this.sgmts[ i - 1].cube.position.x;
this.sgmts[i].cube.position.z=this.sgmts[ i - 1].cube.position.z;
this.sgmts[i].cube.position.y=this.sgmts[ i - 1].cube.position.y;
}
this.sgmts[0].cube.position.z=new_z;
this.sgmts[0].cube.position.x=new_x;
this.jmp();
if(this.currentDirection)
if( this.self_collision())
while( this.sgmts.length > 1)
scene.remove( this.sgmts.pop().cube);
this.currentDirection=dir;
}
Snake.prototype.jmp=function() {
if( ! this.jmp_dir)
return;
if( this.sgmts[0].cube.position.y <= this.segment_size && this.jmp_dir=="down")
this.jmp_dir=null;
if(this.sgmts[0].cube.position.y < this.segment_size * 7 && this.jmp_dir=="up") {
this.sgmts[0].cube.position.y += this.speed;
this.jmp_dir="up";
}
else if( this.sgmts[0].cube.position.y > this.segment_size) {
this.sgmts[0].cube.position.y -= this.speed;
this.jmp_dir="down"
}
}
Snake.prototype.add_segment=function() {
var new_segment=new Segment( this.segment_size, 0, 1 - .1 * this.sgmts.length , .5 - .1 * this.sgmts.length);
new_segment.cube.position.x=this.segment_size * this.sgmts.length;
new_segment.cube.position.y=this.segment_size;
this.sgmts.push( new_segment);
}
Snake.prototype.add_food=function() {
var pos_x=(Math.floor((Math.random() * BNDS_RIGHT * 2) + 1) - BNDS_RIGHT);
var pos_z=(Math.floor((Math.random() * BNDS_UP * 2) + 1) - BNDS_UP);
this.food.push( new SnakeFood( this.segment_size * 2, pos_x, this.segment_size, pos_z, .5, .3, .2) );
}
Snake.prototype.check_food_collision=function() {
for ( var i=0; i < this.food.length; ++i) {
if( Math.abs(this.sgmts[0].cube.position.x - this.food[i].cube.position.x) < this.segment_size * 2
&& Math.abs(this.sgmts[0].cube.position.y - this.food[i].cube.position.y) < this.segment_size * 2
&& Math.abs(this.sgmts[0].cube.position.z - this.food[i].cube.position.z) < this.segment_size * 2) {
for ( var j=0; j < 20; ++j)
this.add_segment();
this.add_food();
scene.remove(this.food[i].cube);
this.food.splice( i , 1);
}
}
}
Snake.prototype.self_collision=function() {
for (var i=1; i < this.sgmts.length; ++i)
if( this.sgmts[0].cube.position.x==this.sgmts[i].cube.position.x
&& this.sgmts[0].cube.position.z==this.sgmts[i].cube.position.z
&& this.sgmts[0].cube.position.y==this.sgmts[i].cube.position.y)
return true;
return false;
}
function SnakeFood(size, x, y, z, r, g, b) {
this.geometry=new THREE.CubeGeometry(size,size,size);
this.material=new THREE.MeshPhongMaterial();
this.material.color.setRGB(.5, .2, .2);
this.cube=new THREE.Mesh( this.geometry, this.material);
this.cube.position.set(x, y, z);
scene.add( this.cube);
}
function Segment( size, r, g, b) {
this.geometry=new THREE.CubeGeometry(size,size,size);
this.material=new THREE.MeshPhongMaterial();
this.material.color.setRGB(.1, .5, .2);
this.cube =new THREE.Mesh( this.geometry, this.material);
scene.add( this.cube);
}
Segment.prototype.setPosition=function ( x, y, z) {
this.cube.position.set( x, size, z);
}
var KEY_SPACE=32;
var KEY_LEFT=37;
var KEY_RIGHT=39;
var KEY_UP=38;
var KEY_DOWN=40;
var HEIGHT=window.innerHeight-30;
var WIDTH=window.innerWidth-30;
var current_dir=0;
var jmp=false;
function keyPress(event) {
event.preventDefault();
if(event.which==KEY_LEFT)
current_dir="left";
else if(event.which==KEY_RIGHT)
current_dir="right";
else if(event.which==KEY_DOWN)
current_dir="down";
else if(event.which==KEY_UP)
current_dir="up";
else if(event.which==KEY_SPACE)
jmp=true;
}
window.addEventListener('keydown',function(event){keyPress(event);},false);
var scene=new THREE.Scene();
var camera=new THREE.PerspectiveCamera(75,WIDTH/HEIGHT,.1,1000);
camera.position.z=50;
camera.position.y=70;
camera.rotation.x=-.6;
var renderer=new THREE.WebGLRenderer();
renderer.setSize(WIDTH, HEIGHT);
renderer.setClearColor(0xC9F6F7,1);
document.body.appendChild(renderer.domElement);
var light=new THREE.PointLight(0xffffff,2,100);
light.position.set(0,80,20);
scene.add(light);
var diralLight=new THREE.DirectionalLight(0xffffff,.5);
diralLight.position.set(1,1,0);
scene.add(diralLight);
var hemisphereL=new THREE.HemisphereLight();
scene.add(hemisphereL);
var PLATFORM_WIDTH=1000;
var PLATFORM_LENGTH=1000;
var BNDS_LEFT=-PLATFORM_WIDTH/2.0+20;
var BNDS_RIGHT=PLATFORM_WIDTH/2.0-20;
var BNDS_UP=PLATFORM_LENGTH/2.0-20;
var BNDS_DOWN=-PLATFORM_LENGTH/2.0+20;
var geometry1=new THREE.CubeGeometry(PLATFORM_WIDTH-1,.1,PLATFORM_LENGTH-1);
var material1=new THREE.MeshPhongMaterial();
material1.color.setRGB(.6,.6,.6);
var platform=new THREE.Mesh(geometry1,material1);
platform.position.set(0,0,0);
var geometry2=new THREE.CubeGeometry(PLATFORM_WIDTH,40,20);
var material2=new THREE.MeshPhongMaterial();
material2.color.setRGB(.1,.1,.1);
var rail1=new THREE.Mesh(geometry2,material2);
rail1.position.set(0,0,PLATFORM_LENGTH/2-10);
var geometry3=new THREE.CubeGeometry(PLATFORM_WIDTH,40,20);
var material3=new THREE.MeshPhongMaterial();
material3.color.setRGB(.1,.1,.1);
var rail2=new THREE.Mesh( geometry3, material3);
rail2.position.set(0, 0,-PLATFORM_LENGTH/2 + 10);
var geometry4=new THREE.CubeGeometry(20,40,PLATFORM_LENGTH);
var material4=new THREE.MeshPhongMaterial();
material4.color.setRGB(.1,.1,.1);
var rail3=new THREE.Mesh(geometry4,material4);
rail3.position.set(PLATFORM_WIDTH/2-10,0,0);
var geometry5=new THREE.CubeGeometry(20,40,PLATFORM_LENGTH);
var material5=new THREE.MeshPhongMaterial();
material5.color.setRGB(.1,.1,.1);
var rail4=new THREE.Mesh(geometry5,material5);
rail4.position.set(-PLATFORM_WIDTH/2+10,0,0);
scene.add(platform);
scene.add(rail1);
scene.add(rail2);
scene.add(rail3);
scene.add(rail4);
var sk=new Snake();
sk.add_segment();
var i=0;
var follow_camera=true;
function render() {
requestAnimationFrame(render);
if(++i%1==0){
if(jmp) {
sk.jmp_dir="up";
sk.jmp();
jmp=false;
}
sk.move( current_dir);
if( follow_camera==true) {
camera.position.x=sk.sgmts[0].cube.position.x;
camera.position.z=sk.sgmts[0].cube.position.z + 100;
}
}
renderer.autoClear=true;
renderer.render(scene, camera);
}
render();
}, 3000);
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