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overhead_test.html
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<html>
<body>
<script>
var loop = 0x80000;
function Vector3(x, y, z) {
this.x = x || 0.0;
this.y = y || 0.0;
this.z = z || 0.0;
}
Object.assign(Vector3.prototype, {
constructor: Vector3,
applyMatrix4: function(m) {
var x = this.x, y = this.y, z = this.z;
var e = m.elements;
var w = 1 / ( e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] );
this.x = ( e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] ) * w;
this.y = ( e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] ) * w;
this.z = ( e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] ) * w;
return this;
},
dot: function (v) {
return this.x * v.x + this.y * v.y + this.z * v.z;
},
copy: function (v) {
this.x = v.x;
this.y = v.y;
this.z = v.z;
return this;
}
});
function Vector3Ex(x, y, z) {
this.elements = new Float64Array(3);
this.elements[0] = x || 0.0;
this.elements[1] = y || 0.0;
this.elements[2] = z || 0.0;
}
Object.assign(Vector3Ex.prototype, {
constructor: Vector3Ex,
applyMatrix4: function(m) {
var x = this.x, y = this.y, z = this.z;
var e = m.elements;
var w = 1 / ( e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] );
this.x = ( e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] ) * w;
this.y = ( e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] ) * w;
this.z = ( e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] ) * w;
return this;
},
dot: function (v) {
return this.x * v.x + this.y * v.y + this.z * v.z;
},
copy: function (v) {
this.x = v.x;
this.y = v.y;
this.z = v.z;
return this;
}
});
Object.defineProperties(Vector3Ex.prototype, {
x: {
get: function () {
return this.elements[0];
},
set: function (value) {
this.elements[0] = value;
}
},
y: {
get: function () {
return this.elements[1];
},
set: function (value) {
this.elements[1] = value;
}
},
z: {
get: function () {
return this.elements[2];
},
set: function (value) {
this.elements[2] = value;
}
}
});
function Matrix4() {
this.elements = [
1.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
0.0, 0.0, 0.0, 1.0
];
}
Object.assign(Matrix4.prototype, {
constructor: Matrix4,
getMaxScaleOnAxis: function () {
var te = this.elements;
var scaleXSq = te[ 0 ] * te[ 0 ] + te[ 1 ] * te[ 1 ] + te[ 2 ] * te[ 2 ];
var scaleYSq = te[ 4 ] * te[ 4 ] + te[ 5 ] * te[ 5 ] + te[ 6 ] * te[ 6 ];
var scaleZSq = te[ 8 ] * te[ 8 ] + te[ 9 ] * te[ 9 ] + te[ 10 ] * te[ 10 ];
return Math.sqrt( Math.max( scaleXSq, scaleYSq, scaleZSq ) );
}
});
function Matrix4Ex() {
this.elements = new Float64Array([
1.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
0.0, 0.0, 0.0, 1.0
]);
}
Object.assign(Matrix4Ex.prototype, {
constructor: Matrix4Ex,
getMaxScaleOnAxis: function () {
var te = this.elements;
var scaleXSq = te[ 0 ] * te[ 0 ] + te[ 1 ] * te[ 1 ] + te[ 2 ] * te[ 2 ];
var scaleYSq = te[ 4 ] * te[ 4 ] + te[ 5 ] * te[ 5 ] + te[ 6 ] * te[ 6 ];
var scaleZSq = te[ 8 ] * te[ 8 ] + te[ 9 ] * te[ 9 ] + te[ 10 ] * te[ 10 ];
return Math.sqrt( Math.max( scaleXSq, scaleYSq, scaleZSq ) );
}
});
function Sphere() {
this.center = new Vector3();
this.radius = 1.0;
}
Object.assign(Sphere.prototype, {
constructor: Sphere,
applyMatrix4: function (m) {
this.center.applyMatrix4(m);
this.radius = this.radius * m.getMaxScaleOnAxis();
},
copy: function (sphere) {
this.center.copy(sphere.center);
this.radius = sphere.radius;
return this;
}
});
function SphereEx() {
this.center = new Vector3Ex();
this.radius = 1.0;
}
Object.assign(SphereEx.prototype, {
constructor: SphereEx,
applyMatrix4: function (m) {
this.center.applyMatrix4(m);
this.radius = this.radius * m.getMaxScaleOnAxis();
},
copy: function (sphere) {
this.center.copy(sphere.center);
this.radius = sphere.radius;
return this;
}
});
function Frustum() {
this.planes = [
new Plane(),
new Plane(),
new Plane(),
new Plane(),
new Plane(),
new Plane()
];
}
Object.assign(Frustum.prototype, {
constructor: Frustum,
intersectsObject: function () {
var sphere = new Sphere();
return function intersectsObject(s, m) {
sphere.copy(s).applyMatrix4(m);
return this.intersectsSphere(sphere);
};
}(),
intersectsSphere: function (sphere) {
var planes = this.planes;
var center = sphere.center;
var negRadius = - sphere.radius;
for (var i = 0; i < 6; i++) {
var distance = planes[ i ].distanceToPoint( center );
if ( distance > negRadius ) {
return false;
}
}
return true;
}
});
function FrustumEx() {
this.planes = [
new PlaneEx(),
new PlaneEx(),
new PlaneEx(),
new PlaneEx(),
new PlaneEx(),
new PlaneEx()
];
}
Object.assign(FrustumEx.prototype, {
constructor: FrustumEx,
intersectsObject: function () {
var sphere = new SphereEx();
return function intersectsObject(s, m) {
sphere.copy(s).applyMatrix4(m);
return this.intersectsSphere(sphere);
};
}(),
intersectsSphere: function (sphere) {
var planes = this.planes;
var center = sphere.center;
var negRadius = - sphere.radius;
for (var i = 0; i < 6; i++) {
var distance = planes[ i ].distanceToPoint( center );
if ( distance > negRadius ) {
return false;
}
}
return true;
}
});
function Plane() {
this.normal = new Vector3(1, 0, 0);
this.constant = 0;
}
Object.assign(Plane.prototype, {
constructor: Plane,
distanceToPoint: function (point) {
return this.normal.dot(point) + this.constant;
}
});
function PlaneEx() {
this.normal = new Vector3Ex(1, 0, 0);
this.constant = 0;
}
Object.assign(PlaneEx.prototype, {
constructor: PlaneEx,
distanceToPoint: function (point) {
return this.normal.dot(point) + this.constant;
}
});
var fru1 = new Frustum();
var fru2 = new FrustumEx();
var sph1 = [];
var sph2 = [];
var mat1 = [];
var mat2 = [];
for(var i = 0; i < loop; i++) {
sph1[i] = new Sphere();
sph2[i] = new SphereEx();
mat1[i] = new Matrix4();
mat2[i] = new Matrix4Ex();
}
function test1() {
var n = loop;
var s = sph1;
var m = mat1;
var f = fru1;
for(var i = 0; i < n; i++) {
f.intersectsObject(s[i], m[i]);
}
}
function test2() {
var n = loop;
var s = sph2;
var m = mat2;
var f = fru2;
for(var i = 0; i < n; i++) {
f.intersectsObject(s[i], m[i]);
}
}
function run1() {
var startTime = performance.now();
test1();
var endTime = performance.now();
return endTime - startTime;
}
function run2() {
var startTime = performance.now();
test2();
var endTime = performance.now();
return endTime - startTime;
}
var count = -5;
var totalElapsedTime1 = 0.0;
var totalElapsedTime2 = 0.0;
function run() {
setTimeout(run, 500);
count++;
document.getElementById('button').disabled = true;
document.getElementById('loopNum').innerText = loop;
var elapsedTime1 = run1();
var elapsedTime2 = run2();
if (count <= 0) return;
totalElapsedTime1 += elapsedTime1;
totalElapsedTime2 += elapsedTime2;
document.getElementById('RegularArrayPerformance').innerText = elapsedTime1.toFixed(2) + '/' + (totalElapsedTime1 / count).toFixed(2);
document.getElementById('TypedArrayPerformance').innerText = elapsedTime2.toFixed(2) + '/' + (totalElapsedTime2 / count).toFixed(2);
}
</script>
<button id="button" onclick="run()">run</button><br />
#Loop: <span id="loopNum"></span><br />
Regular array: <span id="RegularArrayPerformance"></span> ms<br />
Typed array: <span id="TypedArrayPerformance"></span> ms<br />
</body>
</html>