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index.html
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<!doctype html>
<html lang="en">
<head>
<title>Circuit Generator</title>
<meta charset="utf-8">
<script>
function genCircuit(width, height, displace,roughness){
var points = [],power=Math.pow(2,Math.ceil(Math.log(width)/Math.log(2)));
points[power/2]=height/2+(Math.random()*displace*2)-displace;
displace*=roughness;
points[power]=points[0]=height/2+(Math.random()*displace*2)-displace;
displace*=roughness;
for(var i=2;i<power;i*=2){
for(var j=(power/i)/2;j<power;j+=power/i){
points[j]=((points[j- (power/i)/2]+points[j+(power/i)/2])/2);
points[j]+=(Math.random()*displace*2)-displace;
}
displace*=roughness;
}
return points;
}
function mapToCircle(points){
var circlePoints=[];
var delta=2*Math.PI/(points.length-1);
var cosDelta=Math.cos(delta);
var sinDelta=Math.sin(delta);
var unitVectorX=1;
var unitVectorY=0;
var angle=0
for(var i=1;i<points.length;i++){
angle+=delta;
unitVectorX=Math.cos(angle);
unitVectorY=Math.sin(angle);
circlePoints[i]=new THREE.Vector3(unitVectorX*points[i],unitVectorY*points[i],0);
/*unitVectorX=unitVectorX*cosDelta-unitVectorY*sinDelta;
unitVectorY=+unitVectorX*sinDelta+unitVectorY*cosDelta;
if(i%5==0){*/
/*}*/
}
circlePoints[0]=new THREE.Vector3(unitVectorX*points[0],unitVectorY*points[0],0);
return circlePoints;
}
function generate(points,radius,displacement,roughness,line,scene){
scene.remove(line);
var points=genCircuit(points, radius, displacement,roughness);
var pointsCarretera=mapToCircle(points);
var material=new THREE.LineBasicMaterial({
color: "#dddd00"
});
var geometry=new THREE.Geometry();
for(var i=0; i<pointsCarretera.length;i++){
geometry.vertices.push(pointsCarretera[i]);
}
line=new THREE.Line(geometry,material);
line.position.set(0,0,-60);
scene.add(line);
return line
}
</script>
</head>
<body style="margin: 0;">
<script src="js/three.min.js"></script>
<script src="js/controls/OrbitControls.js"></script>
<script src="js/libs/stats.min.js"></script>
<script src="js/controls/FirstPersonControls.js"></script>
<script src="js/libs/dat.gui.min.js"></script>
<script>
var line;
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 );
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
document.body.appendChild(stats.domElement);
var params={
points:10,
radius:50,
displacement:30,
roughness:0.7,
generate:function(){ line=generate(params.points,params.radius,params.displacement,params.roughness,line,scene) }
};
var zoomParams={
level:60,
zoomOut:function(){zoomParams.level+=5;},
zoomIn:function(){zoomParams.level-=5;}
}
var gui=new dat.GUI();
var circParam = gui.addFolder('Race track params');
circParam.add(params,'points');
circParam.add(params,'radius');
circParam.add(params,'displacement');
circParam.add(params,'roughness');
circParam.add(params,'generate');
var zoomParam = gui.addFolder('zoom params');
zoomParam.add(zoomParams,'level');
zoomParam.add(zoomParams,'zoomIn');
zoomParam.add(zoomParams,'zoomOut');
circParam.open();
var clock = new THREE.Clock();
var renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
var width=10;
var height=50;
var points=genCircuit(width, height, 30,0.7);
var pointsCarretera=mapToCircle(points);
var material = new THREE.LineBasicMaterial({
color: "#dddd00"
});
var geometry=new THREE.Geometry();
for(var i=0; i<pointsCarretera.length;i++){
geometry.vertices.push(pointsCarretera[i]);
}
line=new THREE.Line(geometry,material);
line.position.set(0,0,0);
scene.add(line);
/*var material2 = new THREE.LineBasicMaterial({
color: 0xdd0000
});
var geometry2=new THREE.Geometry();
for(var i=0; i<points.length;i++){
geometry2.vertices.push(new THREE.Vector3(i,points[i],0));
}
var line2=new THREE.Line(geometry2,material2);
line2.position.set(-60,0,-70);
scene.add(line2);*/
camera.position.x = 0;
camera.position.y =1;
function render() {
camera.position.z=zoomParams.level;
//cube.rotation.x += 0.1;
//cube.rotation.y += 0.1;
//controls.update( clock.getDelta() );
requestAnimationFrame( render );
renderer.render( scene, camera );
stats.update();
}
render();
</script>
</body>
</html>