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canvas image collision with side detection

I am making an online game and I use HTML5 canvas and Javascript to build my game.
I have some shapes and one ball that moves and when collided the shapes, the shapes should disapear.
the shapes and the ball are image and my big problem is how to detect collision between ball and shape because my shapes are rectangle, triangle, polygon and ... e.g.: This Shape
this is my code to detect collision but it just works for rectangles:
function collide(r1, r2) {
var dx = (r1.x + r1.width / 2) - (r2.x + r2.width / 2);
var dy = (r1.y + r1.height / 2) - (r2.y + r2.height / 2);
var width = (r1.width + r2.width) / 2;
var height = (r1.height + r2.height) / 2;
var crossWidth = width * dy;
var crossHeight = height * dx;
var collision = 'none';
if (Math.abs(dx) <= width && Math.abs(dy) <= height) {
if (crossWidth > crossHeight) {
collision = (crossWidth > (-crossHeight)) ? 'bottom' : 'left';
} else {
collision = (crossWidth > -(crossHeight)) ? 'right' : 'top';
}
}
return (collision);
}

Just get your collision code to work for triangles and then it will work for all shapes! Here is the formula, in Javascript code for doing just that, taken from(mostly) this question.
function sign(p1, p2, p3) {
return (p1[0] - p3[0]) * (p2[1] - p3[1]) - (p2[0] - p3[0]) * (p1[1] - p3[1]);
}
function inTriangle(point, trip1, trip2, trip3) {
var b1 = sign(point, trip1, trip2) < 0.0;
var b2 = sign(point, trip2, trip3) < 0.0;
var b3 = sign(point, trip3, trip1) < 0.0;
return ((b1 == b2) && (b2 == b3));
}
With this code you just have to run, inTriangle(p, v1, v2, v3), where p is the point your testing for, in collision detection that would be each of the corners of a shape, with a ball or circle just test some points on the circumference, v1; v2; v3 are the three points of a triangle your testing for.
Keep in mind that it is more efficient to test for the collision of a rectangle so if you have a shape that can be divided up like a rectangle, you should do so, instead of dividing it into triangles.

Animated footsteps in html svg

Is it possible to create small animated footsteps in HTML SVG or Canvas. I am just starting out with these technologies, and it is very much necessary for a small project i am working on.
My current idea was to create and use a "gif" of animated footsteps. But i would like to know if it can be achieved in any other way through HTML/CSS/JS
PS : The footsteps i keep mentioning should be similar to the footsteps that appear on the "Marauders Map" in harry potter Movies.
Thanks for any help

Walk about.
I have never seen the movie you talk about so I am guessing what you are after.
To do it on the canvas is easy, and I am more than happy to write an example of how it's done for you.
Draw a foot
You need an image of a foot, or some way to draw a foot. I used a set of shapes I happened to have to draw a foot.
Then create a function that draws the foot at a location and in a direction. You also need to specify if its a left or right step.
If you have a foot image you want to use just replace the code in the drawFoot function after the comment // draw the foot... with ctx.drawImage(footImage,-footImage.width / 2, -footImage.height / 2);
You may have to scale the image, and the foot image should be of the left foot toes pointing to the right of screen
Path
The path to walk along is just an array of points, [x,y,x,y...] in order that define the path to travel along, They are just a guide as each foot step is a fixed distance apart and the points can be any distance appart.
Animate
Each step is some time apart (demo is 500ms or half a second). I use setTimeout to call the function to draw the next step. When the function is called I find the next position on the path and draw the next foot step.
When the walk has gone past the end of the path I clear the canvas and restart.
Demo
It's self explanatory in the demo. I track two positions on the path, one is where the foot step is, and the other is just ahead and used to get the direction the foot should be drawn.
The function that gets the distance along the path is recursive because the path points are not uniform in distance apart, so may have to skip line segments if the distance to travel is greater than the current or next or few line segments.
// create a canvas and add it to the DOM
var createImage=function(w,h){var i=document.createElement("canvas");i.width=w;i.height=h;i.ctx=i.getContext("2d");return i;}
var canvas = createImage(1024,512);
var ctx = canvas.ctx;
document.body.appendChild(canvas);
// shapes for the foot. Left foot
const foot = [
[50.86759744022923,-21.798383338076917,54.16000854997335,-23.917474843549847,57.778065334829385,-25.310771525314685,61.579706305344985,-24.823762596975733,65.0168431653022,-22.69100336700319,65.22736925598322,-19.777045647294724,63.09649708656406,-16.826669881834157,59.66512409715465,-15.356252875428147,56.12216018899968,-14.92259970211097,52.06404407417057,-16.231839553378,50.2945579442406,-18.938589556263246],
[60.12039562389232,-12.45714817900668,63.92394094034509,-14.994440399059425,68.75013312287521,-15.737202635924493,73.10937504616481,-14.878459739068003,76.36064492186433,-12.559833524837757,77.6863729180915,-9.181208344485064,75.4625672565435,-5.673231626251427,71.79886053681197,-3.7381471592011817,66.8618942467243,-3.4903609701416993,62.29264392518654,-5.1248680438596885,58.98975517513061,-8.760952968033395],
[65.57414109270752,1.1797411270282658,69.37768640916029,-1.3575510930244814,74.20387859169041,-2.1003133298895467,78.56312051498001,-1.241570433033059,81.81439039067953,1.0770557811971881,83.14011838690669,4.455680961549877,80.9163127253587,7.963657679783514,77.25260600562717,9.898742146833756,72.3156397155395,10.146528335893239,67.74638939400174,8.512021262175251,64.44350064394581,4.875936338001546],
[65.89915812212375,15.917267748549033,69.97688522977245,12.635767809535894,76.25232402290966,11.736330263416008,81.47328014710077,12.477566678331382,86.09545897877996,15.579569438835726,86.99032987455637,21.425830739951824,83.82647235747945,24.97297628549917,79.18353918133074,27.064789354098487,73.69821507617947,27.23418460503707,68.46309469655478,24.972976285499172,64.88602415530316,20.55351481505123],
[58.48881251239855,36.09589759380796,65.7080603859302,29.82038065752831,74.19222753183148,28.331948884004674,82.75081761131048,31.085582242549528,88.10923922724437,34.28575070762116,91.45825273720305,41.65358042953028,87.067323913035,47.45853718012533,79.77391671356942,50.28659303297933,71.73628428966856,50.06332546564875,64.14518700042888,47.45853718012533,60.12637078847845,42.69549574373964],
[-73.48953442580058,20.579088801900756,-80.48690958722098,13.959950657259256,-81.93681598574045,6.269142804242765,-81.49554012532147,-1.6107832746678348,-77.90207999991593,-9.181527272091415,-71.6611785393426,-14.98115303708649,-64.60076477263831,-17.880965834138024,-57.35123278004056,-19.078714598132443,-50.09111381970131,-19.902008890566687,-42.96765884171789,-19.08249722231963,-35.655087439697766,-18.51514254492067,-28.90987071615029,-18.578181953551955,-21.74774447703016,-19.60773669210723,-14.309090001741001,-20.364210136314323,-6.933479190821032,-21.688037717705875,0.33383104043200396,-22.888118253462963,7.772483543580581,-23.77067027395373,15.274173171058239,-24.338024951681817,22.460665755024706,-24.590182586206954,29.710197747622452,-23.707630865368966,36.8557533915613,-22.565778766908277,44.16832856198768,-19.28772830000901,51.48089996424725,-14.370654426435763,56.713170880643965,-7.499358885625703,60.24016927073608,-0.41616112008138906,61.75311234056134,6.518193267525415,62.38350642684393,13.515567625813127,61.67231220934209,20.50500542283382,59.08769637136125,27.56541945045329,54.35974072401175,34.87799085169213,48.686193947196124,39.41682827314464,41.87793781501736,42.379680478815025,34.313208779263185,43.26223219965301,27.063676786665432,42.25360166155246,19.625026568173826,38.28211891778152,13.457927624759604,31.720792179781256,9.486440924356895,25.290772320002496,6.019273449215143,18.7346738223298,0.21964785513691965,13.565442314564446,-5.832135373466421,9.467880753530935,-12.632472285211591,8.882365666622222,-19.188577231399584,11.277861070017005,-26.31203040678842,14.49287091019486,-32.99420772170462,17.833959567652954,-39.2981485848331,20.670732956060768,-45.854247082486715,23.192309301312157,-52.47338498877162,24.89437333435685,-59.5968381641068,25.020452151619416,-67.33461307855538,23.697386555044208],
]
const footScale = 0.2; // how big the foot is
const stepLen = 60; // distance between steps
var stepCount = 0; // current set num so left and right can be known
var stepTime = 500; // time ms between steps
// path to walk
const path = [56.20191403126277,162.4451015086347,83.38688266344644,172.80127602121507,107.98280549274708,192.86637096042372,121.57528916149568,221.34586055208607,124.81159479691195,256.2979614145819,141.64038410107662,293.8391067854107,168.82535143857336,311.9624183437419,203.77745230106916,336.5583411729056,238.0822920364817,344.9727358249879,278.2124819156436,341.0891690624884,316.40088841355566,329.43846877498976,343.58585575105235,310.6678960895754,370.77082308854904,275.7157952270795,359.12012280105046,244.64726112708325,344.23311687813566,207.10611575625444,355.23655603855093,168.9177092583423,394.0722236635463,137.2019140312628,438.0859803052077,137.84917515834604,487.27782596353507,174.0957982750084,507.9901820301992,221.9931216791693,513.1682710468652,269.243183956247,500.87030963228347,318.43502961457443,480.1579535656192,354.68165273123674,453.62744426338134,396.86543776550707,414.1445200788371,427.9340428271046,372.7198079555102,447.3518767949864,320.2916566617712,442.173787778395,272.39433325761024,427.9340429825634,218.02439858261675,441.5265266513118,185.66134222845398,472.59506075130815,160.418158272207,514.6670340117198,168.2291881671332,557.5405924870362,200.59229872785795,598.9654951914354,232.9553551615553,627.4449850627141,273.08554504131894,651.3936467669101,320.3356073183967,663.0443470544095,368.2329307225576,663.6916081814927,417.4247763808851,649.4518633856611,460.7912718954633,626.150462810664,509.33585642670744,593.1401453294179,530.6954736204549,556.8935222127556,559.9273870166451,517.9197870310509,582.4287517306153,484.11964343037323,597.1560832290169,459.03222473087396,621.0274949086466,438.11039022321154,651.3689440081158,429.43667093843567,686.3731150817684,432.05029606733103,726.1878666750503,421.6902139845064,748.5744620042316,397.8927935245363,778.6337708564557,367.5111094723503,792.6287871481064,335.0802046803193,795.4641381478963,294.8623601925252,790.3177294792127,255.26933447013639,776.3228370821212,225.344431214269,746.3711518226298,192.73203550406103,713.7991149596966,199.06094085265394,674.3068624609349,207.5062077919911,638.4763261746227,190.31310645331482,613.6509940547375,146.74931837304698,621.5992452450397,103.454341485492,665.5124383180124,60.96567428151931,716.1845355322713,48.49595708249788,763.6383682758693,51.23726133320403,810.1045243122669,71.53440096982465,842.407749982487,97.97907893142005,879.5993779794437,131.14717279570036,903.6790094213126,175.24174017377706,915.9471803279671,219.31612086267396,902.1335310600084,270.1561321514687,880.1365756762476,315.0232456643523,884.5103070340778,370.89556334366307,909.7723644212043,407.9691345807976,947.0675376346722,439.8492118274288,990.6429384281869,439.26727537005956,1036.8675099917996,414.23364852545194,1070.3264506272462,387.0500494883014,1100.6074853525497,351.4546920217324,1119.943854180156,306.7958514306488,1128.5371035594999,259.67124425611814,1122.6651029017848,208.79760059460207,1106.8898009575623,162.16340658911932,1082.4004208812885,108.81054339506417,1050.2046949092428,81.72759371897288,1016.627194271211,46.42875173061529];
const pLen = path.length;
// fix the path so it starts at zero
for(var i = 2; i < pLen; i += 2){
path[i] -= path[0];
path[i+1] -= path[1];
}
path[0] = path[1] = 0;
// tracks the foot pos
var pos = {
x : path[0],
y : path[1],
index : 0,
};
// tracks the foot pointing to pos
var pos1 = {
x : path[0],
y : path[1],
index : 0,
};
// get a distance alone the path
function getDistOnPath(dist,pos){
var nx = path[(pos.index + 2) % pLen] - pos.x;
var ny = path[(pos.index + 3) % pLen] - pos.y;
var d = Math.hypot(nx, ny);
if(d > dist){
pos.x += (nx / d) * dist;
pos.y += (ny / d) * dist;
return pos;
}
dist -= d;
pos.index += 2;
pos.x = path[pos.index % pLen];
pos.y = path[(pos.index + 1) % pLen];
return getDistOnPath(dist, pos);
}
function drawFoot(x,y,dir,left){
var i,j,shape;
var xdx = Math.cos(dir) * footScale;
var xdy = Math.sin(dir) * footScale;
if(left){
ctx.setTransform(xdx, xdy, -xdy, xdx, x + xdy * 50, y - xdx * 50);
ctx.rotate(-0.1); // make the foot turn out a bit
}else{
ctx.setTransform(xdx, xdy, -xdy, xdx, x - xdy * 50, y + xdx * 50);
ctx.rotate(-0.1); // make the foot turn out a bit
ctx.scale(1,-1); // right foot needs to be mirrored
}
// draw the foot as a set of paths points
ctx.beginPath();
for(j = 0; j < foot.length; j ++){
shape = foot[j];
i = 0;
ctx.moveTo(shape[i++],shape[i++]);
while(i < shape.length){
ctx.lineTo(shape[i++],shape[i++]);
}
ctx.closePath();
}
ctx.fill();
}
ctx.setTransform(1,0,0,1,0,0);
ctx.clearRect(0,0,canvas.width,canvas.height);
pos1 = getDistOnPath(stepLen/10,pos1); // put the second pos infront so that a direction can be found
function drawStep(){
if(pos.index > pLen){ // if past end of path clear and restart
ctx.setTransform(1,0,0,1,0,0);
ctx.clearRect(0,0,canvas.width,canvas.height);
pos.index = 0;
pos1.index = 0;
pos1.x = pos.x = path[0];
pos1.y = pos.y = path[1];
pos1 = getDistOnPath(stepLen/10,pos1);
}
pos = getDistOnPath(stepLen,pos);
pos1 = getDistOnPath(stepLen,pos1);
drawFoot(pos.x,pos.y,Math.atan2(pos1.y - pos.y, pos1.x - pos.x),(stepCount++) % 2 === 0);
setTimeout(drawStep,stepTime);
}
drawStep();
Note some of the code is ES6 and will require babel (or equivilent) to run on legacy browsers.

Returning precise vector components in js canvas

I have been wrestling with rendering an animation that fires a projectile accurately from an "enemy" node to a "player" node in a 2D 11:11 grid (0:0 = top-left) in JS/Canvas. After a lot of reading up I've managed to get the shots close, but not quite bang on. I think my velocity function is a little out but I really don't know why. This is the trigonometric function:
this.getVelocityComponents = function(speed){
// loc (location of enemy actor) = array(2) [X_coord, Y_coord]
// des (destination (ie. player in this instance)) = array(2) [X_coord, Y_coord]
var i, sum, hyp, output = [], dis = [];
var higher = false;
for (i in loc) {
sum = 0;
if (loc[i] > des[i])
sum = loc[i] - des[i];
if (loc[i] < des[i])
sum = des[i] - loc[i];
dis.push(sum);
}
hyp = Math.sqrt(Math.pow(dis[X], 2) + Math.pow(dis[Y], 2));
if (dis[X] > dis[Y]) {
output[X] = (speed * Math.cos(dis[X]/hyp))
output[Y] = (speed * Math.sin(dis[Y]/hyp))
} else if (dis[X] < dis[Y]) {
output[X] = (speed * Math.cos(dis[Y]/hyp))
output[Y] = (speed * Math.sin(dis[X]/hyp))
}
return output;
}
and this is the instruction that tells the X and the Y of the projectile frame to advance:
var distance = [];
for (i in loc) {
var sum = 0;
if (loc[i] > des[i])
sum = loc[i] - des[i];
if (loc[i] < des[i])
sum = des[i] - loc[i];
distance.push(sum);
}
if (distance[X] > distance[Y]) {
frm[X] += (loc[X] < des[X]) ? v[X] : -v[X];
frm[Y] += (loc[Y] < des[Y]) ? v[Y] : -v[Y];
} else {
frm[Y] += (loc[Y] < des[Y]) ? v[X] : -v[X];
frm[X] += (loc[X] < des[X]) ? v[Y] : -v[Y];
}
Below is a screenshot. Blue is player, pink enemy and the yellow circles are projectiles
as you can see, it's almost on the mark.
Have I done something wrong? what do I need to do?

To calculate the direction from enemy to player you can simplify the calculations a little.
Find direction angle
var diffX = Player.x - Enemy.x, // difference in position
diffY = Player.y - Enemy.y,
angle = Math.atan2(diffY, diffX); // atan2 will give the angle in radians
Notice also difference for Y comes first for atan2 as canvas is oriented 0° pointing right.
Velocity vector
Then calculate the velocity vector using angle and speed:
// calculate velocity vector
var speed = 8,
vx = Math.cos(angle) * speed, // angle x speed
vy = Math.sin(angle) * speed;
You might want to consider using time as a factor if that is important. You can see my answer from a while back here for an example on this.
Demo
Using these calculations you will be able to always "hit" the player with the projectile (reload demo to change enemy position to random y):
var ctx = document.querySelector("canvas").getContext("2d"),
Player = {
x: 470,
y: 75
},
Enemy = {
x: 100,
y: Math.random() * 150 // reload demo to change y-position
};
// calculate angle
var diffX = Player.x - Enemy.x,
diffY = Player.y - Enemy.y,
angle = Math.atan2(diffY, diffX);
// calculate velocity vector
var speed = 8,
vx = Math.cos(angle) * speed, // angle x speed
vy = Math.sin(angle) * speed,
x = Enemy.x, // projectil start
y = Enemy.y + 50;
// render
(function loop() {
ctx.clearRect(0, 0, 500, 300);
ctx.fillRect(Player.x, Player.y, 30, 100);
ctx.fillRect(Enemy.x, Enemy.y, 30, 100);
ctx.fillRect(x - 3, y -3, 6, 6);
x += vx;
y += vy;
if (x < 500) requestAnimationFrame(loop);
})();
<canvas width=500 height=300></canvas>

The solution is much simpler than that.
What should you do ?
1) compute the vector that leads from you enemy to the player. That will be the shooting direction.
2) normalize the vector : meaning you build a vector that has a length of 1, with the same direction.
3) multiply that vector by your speed : now you have a correct speed vector, with the right norm, aimed at the player.
Below some code to help you understand :
function spawnBullet(enemy, player) {
var shootVector = [];
shootVector[0] = player[0] - enemy[0];
shootVector[1] = player[1] - enemy[1];
var shootVectorLength = Math.sqrt(Math.pow(shootVector[0], 2) + Math.pow(shootVector[1],2));
shootVector[0]/=shootVectorLength;
shootVector[1]/=shootVectorLength;
shootVector[0]*=bulletSpeed;
shootVector[1]*=bulletSpeed;
// ... here return an object that has the enemy's coordinate
// and shootVector as speed
}
Then, since you don't use time in your computations (!! wrooong !! ;-) ) you will make the bullet move with the straightforward :
bullet[0] += bullet.speed[0];
bullet[1] += bullet.speed[1];
Now the issue with fixed-step is that your game will run, say, twice slower on a 30fps device than on a 60fps device. The solution is to compute how much time elapsed since the last refresh, let's call this time 'dt'. Using that time will lead you to an update like :
bullet[0] += dt * bullet.speed[0];
bullet[1] += dt * bullet.speed[1];
and now you'll be framerate-agnostic, your game will feel the same on any device.

How can I get the direction of rotation relative to a given point from the mouse movement in javascript?

I'm using the following functions to track mouse movement and rotate an object:
function getAngle(dx, dy) {
var angle
if (dx != 0) {
var radians = Math.atan(dy / dx) + (dx < 0 ? Math.PI : 0)
angle = radiansToDegrees(radians);
if (angle < 0) angle += 360;
} else {
angle = dy > 0 ? 90 : 270;
}
return angle;
}
function getAngleBetweenPoints(p1, p2) {
var dx = p1.x - p2.x
var dy = p1.y - p2.y
return getAngle(dx, dy)
}
$(document).mousemove(function (e) {
if (selectionBounds) {
var midpoint = new pe.Classes.Point(selectionBounds.Left + (selectionBounds.Width / 2), selectionBounds.Top + (selectionBounds.Height / 2));
var mousepoint = new pe.Classes.Point(e.pageX, e.pageY);
var angle = getAngleBetweenPoints(midpoint, mousepoint);
if (lastAngle) {
var diff = angle - lastAngle;
rotate(degreesToRadians(diff));
}
lastAngle = angle;
}
});
This works well, as long as I move the mouse slowly, and as long as the mouse doesn't get too close to the origin (midpoint). Moving too quickly causes additional spin rotations, and coming close to the origin causes unexpected changes of direction.
How can I fix this code? I really just need to know which direction the mouse is moving in (clockwise or anti-clockwise), as I can get an idea of the speed just from the change in mousepoint and then update the rotation based on that.
There are literally dozens of SO threads on topics related to this (How to get the direction (angle) of rectangle after rotating it from a pivot point, How to get cardinal mouse direction from mouse coordinates, Moving a rotated element in the direction of the rotation in JavaScript) - but I haven't been able to find anything that can answer this question, except one comment referring to this requiring the cross product, which I didn't fully understand.

http://jsfiddle.net/wRexz/3/ (click and drag to rotate the rectangle)
var angle = 0, sp = startpoint, mp = midpoint;
var p = {x:e.offsetX, y:e.offsetY};
var sAngle = Math.atan2((sp.y-mp.y),(sp.x - mp.x));
var pAngle = Math.atan2((p.y-mp.y),(p.x - mp.x));
angle = (pAngle - sAngle) * 180/Math.PI;
$("#display").text(angle);
$('#rotateme').css({ rotate: '+=' + angle });
startpoint = {x:p.x, y:p.y};
The concept here is basic trig. You find the angle from 0 of the "start point" and do the same for the "end point" or "current point". Subtract the first from the second, and that is your "delta angle".
You will still get erratic behavior around the midpoint, due to the nature of how rapidly the angles can change. One solution to this is stopping rotation when within a certain distance of the midpoint.

Three.js First Person Controls

I'm playing around with Three.js and WebGL and can't quite get the controls the way I want. I chose to try to "roll my own" controls since Three.js's FirstPersonControls do not use pointer lock.
Anyway, I took most of my code from the built-in FirstPersonControls, converted it to use pointer lock (movementX instead of pageX - offset), but I am having trouble smoothing the look motion.
Here is my onMouseMove (using originalEvent since it is a jquery event):
onMouseMove: function(e) {
if(!document.pointerLockElement) return;
var moveX = e.originalEvent.movementX ||
e.originalEvent.mozMovementX ||
e.originalEvent.webkitMovementX ||
0,
moveY = e.originalEvent.movementY ||
e.originalEvent.mozMovementY ||
e.originalEvent.webkitMovementY ||
0;
//Update the mouse movement for coming frames
this.mouseMovementX = moveX;
this.mouseMovementY = moveY;
}
And my Controls.update() (called on each animation frame, with the THREE.Clock delta):
update: function(delta) {
if(this.freeze) {
return;
}
//movement, works fine
if(this.moveForward) this.camera.translateZ(-(actualMoveSpeed + this.autoSpeedFactor));
if(this.moveBackward) this.camera.translateZ(actualMoveSpeed);
if(this.moveLeft) this.camera.translateX(-actualMoveSpeed);
if(this.moveRight) this.camera.translateX(actualMoveSpeed);
/////////
//ISSUES ARE WITH THIS CODE:
/////////
//look movement, really jumpy
this.lon += this.mouseMovementX;
this.lat -= this.mouseMovementY;
this.lat = Math.max(-85, Math.min(85, this.lat));
this.phi = (90 - this.lat) * Math.PI / 180;
this.theta = this.lon * Math.PI / 180;
this.target.x = this.camera.position.x + 100 * Math.sin(this.phi) * Math.cos(this.theta);
this.target.y = this.camera.position.y + 100 * Math.cos(this.phi);
this.target.z = this.camera.position.z + 100 * Math.sin(this.phi) * Math.sin(this.theta);
this.camera.lookAt(this.target);
}
This code does work, but moving the camera is jumpy as the mouse moves around. I could really use some help figuring out how to smooth it.
You can see what I mean by "jumpy" here. I'm new to Three.js, WebGL, and just 3D in general so any help is appreciated.
Thanks,
-Chad
EDIT After working with #przemo_li, here is the working code he came up with:
onMouseMove: function(e) {
if(!document.pointerLockElement) return;
var moveX = e.originalEvent.movementX ||
e.originalEvent.mozMovementX ||
e.originalEvent.webkitMovementX ||
0,
moveY = e.originalEvent.movementY ||
e.originalEvent.mozMovementY ||
e.originalEvent.webkitMovementY ||
0;
//Update the initial coords on mouse move
this.mouseMovementX += moveX; //aggregate mouse movements as a total delta delta
this.mouseMovementY += moveY;
},
update: function(delta) {
if(this.freeze) {
return;
}
//movement
if(this.moveForward) this.camera.translateZ(-(actualMoveSpeed + this.autoSpeedFactor));
if(this.moveBackward) this.camera.translateZ(actualMoveSpeed);
if(this.moveLeft) this.camera.translateX(-actualMoveSpeed);
if(this.moveRight) this.camera.translateX(actualMoveSpeed);
//look movement
this.lon += this.mouseMovementX;
this.lat -= this.mouseMovementY;
this.mouseMovementX = 0; //reset mouse deltas to 0 each rendered frame
this.mouseMovementY = 0;
this.phi = (90 - this.lat) * Math.PI / 180;
this.theta = this.lon * Math.PI / 180;
if(this.constrainVertical) {
this.phi = THREE.Math.mapLinear(this.phi, 0, Math.PI, this.verticalMin, this.verticalMax);
}
this.target.x = this.camera.position.x + 100 * Math.sin(this.phi) * Math.cos(this.theta);
this.target.y = this.camera.position.y + 100 * Math.cos(this.phi);
this.target.z = this.camera.position.z + 100 * Math.sin(this.phi) * Math.sin(this.theta);
this.camera.lookAt(this.target);
}

'Official' version just added: https://github.com/mrdoob/three.js/blob/master/examples/js/controls/PointerLockControls.js

1)Constraints?
In your code you limit mouse X movement to -|+ 85 Its unlikely that such constraint is needed.
2)Aggregate all events that happen during frame
In your code you override mouse movement with each new event. So if you get 3 events during frame only most recent will be stored.
Add those movements. Than after rendering frame you can clear count. And start gathering events again.