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script.js
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script.js
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class Vector2 {
constructor(vec, y) {
if(typeof vec === "undefined" &&
typeof y === "undefined") {
this.x = 0;
this.y = 0;
} else if(typeof vec === "number" &&
typeof y === "undefined") {
this.x = vec;
this.y = vec;
} else if(typeof vec === "number" &&
typeof y === "number") {
this.x = vec;
this.y = y;
} else if(typeof vec === "object" && vec.constructor == Vector2) {
this.x = vec.getX()
this.y = vec.getY();
} else
throw 'Vector2::constructor(): Invalid types ' + (typeof vec) + ' ' + (typeof y);
}
getX() {
return this.x;
}
getY() {
return this.y;
}
setX(x) {
if(typeof x !== "number")
throw 'Vector2::setX(): Invalid type ' + (typeof x);
this.x = x;
}
setY(y) {
if(typeof y !== "number")
throw 'Vector2::setY(): Invalid type ' + (typeof y);
this.y = y;
}
add(vec, y) {
if(typeof vec === "number" &&
typeof y === "undefined") {
return new Vector2(
this.x + vec,
this.y + vec
);
} else if(typeof vec === "number" &&
typeof y === "number") {
return new Vector2(
this.x + vec,
this.y + y
);
} else if(typeof vec === "object" && vec.constructor == Vector2) {
return new Vector2(
this.x + vec.getX(),
this.y + vec.getY()
);
} else
throw 'Vector2::add(): Invalid types ' + (typeof vec) + ' ' + (typeof y);
}
sub(vec, y) {
if(typeof vec === "number" &&
typeof y === "undefined") {
return new Vector2(
this.x - vec,
this.y - vec
);
} else if(typeof vec === "number" &&
typeof y === "number") {
return new Vector2(
this.x - vec,
this.y - y
);
} else if(typeof vec === "object" && vec.constructor == Vector2) {
return new Vector2(
this.x - vec.getX(),
this.y - vec.getY()
);
} else
throw 'Vector2::sub(): Invalid types ' + (typeof vec) + ' ' + (typeof y);
}
mul(vec, y) {
if(typeof vec === "number" &&
typeof y === "undefined") {
return new Vector2(
this.x * vec,
this.y * vec
);
} else if(typeof vec === "number" &&
typeof y === "number") {
return new Vector2(
this.x * vec,
this.y * y
);
} else if(typeof vec === "object" && vec.constructor == Vector2) {
return new Vector2(
this.x * vec.getX(),
this.y * vec.getY()
);
} else
throw 'Vector2::mul(): Invalid types ' + (typeof vec) + ' ' + (typeof y);
}
div(vec, y) {
if(typeof vec === "number" &&
typeof y === "undefined") {
return new Vector2(
this.x / vec,
this.y / vec
);
} else if(typeof vec === "number" &&
typeof y === "number") {
return new Vector2(
this.x / vec,
this.y / y
);
} else if(typeof vec === "object" && vec.constructor == Vector2) {
return new Vector2(
this.x / vec.getX(),
this.y / vec.getY()
);
} else
throw 'Vector2::div(): Invalid types ' + (typeof vec) + ' ' + (typeof y);
}
length() {
return Math.sqrt(this.x * this.x + this.y * this.y);
}
};
$(document).ready(function($) {
var entities = [];
var entityId = 0;
class Entity {
constructor() {
var entity = this;
this.id = entityId++;
this.position = new Vector2();
this.speed = new Vector2();
this.elem = $('<div>').addClass('point').appendTo('body');
this.row = $('<tr>').appendTo('#table_entities');
this.columns = {
id: $('<td>').text(this.id).appendTo(this.row),
position: $('<td>').appendTo(this.row),
speed: $('<td>').appendTo(this.row),
color: $('<td>').appendTo(this.row),
actions: $('<td>').appendTo(this.row),
}
this.colorPicker = $('<input />')
.attr('type', 'color')
.change(function(){
entity.elem.css('background-color', $(this).val());
})
.appendTo(this.columns.color)
.change();
$('<button>')
.addClass('btn btn-xs btn-danger')
.text(' Löschen')
.prepend($('<i>').addClass('glyphicon glyphicon-trash'))
.appendTo(this.columns.actions)
.click(function(){
entity.elem.remove();
entity.row.remove();
var index = entities.indexOf(entity);
if (index > -1) {
entities.splice(index, 1);
}
});
}
};
$('#button_add').click(function(){
entities.push(new Entity());
});
$('#button_rainbow').click(function(){
var generateColors = function(count) {
var generateColor = function(position) {
var makeCode = function(r, g, b) {
return '#' +
(r < 16 ? '0' : '') + parseInt(r).toString(16) +
(g < 16 ? '0' : '') + parseInt(g).toString(16) +
(b < 16 ? '0' : '') + parseInt(b).toString(16);
}
if(position >= 0 && position < 256) return makeCode(255, position, 0);
else if(position >= 256 && position < 512) return makeCode(255 - (position - 256), 255, 0);
else if(position >= 512 && position < 768) return makeCode(0, 255, position - 512);
else if(position >= 768 && position < 1024) return makeCode(0, 255 - (position - 768), 255);
else if(position >= 1024 && position < 1280) return makeCode(position - 1024, 0, 255);
else if(position >= 1280 && position < 1536) return makeCode(255, 0, 255 - (position - 1280));
};
var colors = [];
for(var position = 0; position <= 1535; position += (1536 / count))
colors.push(generateColor(position));
return colors;
};
var colors = generateColors(entities.length);
for(var i = 0; i < entities.length; i++) {
entities[i].elem.css('background-color', colors[i]);
entities[i].colorPicker.val(colors[i]);
}
});
for (var i = 0; i < 8; i++) {
$('#button_add').click();
}
var mousePosition = new Vector2;
$(document).mousemove(function(event) {
mousePosition = new Vector2(
event.pageX,
event.pageY
);
});
setInterval(function() {
var DELTAT = parseFloat($('#input_deltat').val());
var SEGLEN = parseFloat($('#input_seglen').val());
var SPRINGK = parseFloat($('#input_springk').val());
var MASS = parseFloat($('#input_mass').val());
var GRAVITY = parseFloat($('#input_gravity').val());
var RESISTANCE = parseFloat($('#input_resistance').val());
var STOPVEL = parseFloat($('#input_stopvel').val());
var STOPACC = parseFloat($('#input_stopacc').val());
var BOUNCE = parseFloat($('#input_bounce').val());
var collisionUp = $('#input_collisionUp').is(':checked');
var collisionLeft = $('#input_collisionLeft').is(':checked');
var collisionRight = $('#input_collisionRight').is(':checked');
var collisionDown = $('#input_collisionDown').is(':checked');
$('#display_deltat').text(DELTAT);
$('#display_seglen').text(SEGLEN);
$('#display_springk').text(SPRINGK);
$('#display_mass').text(MASS);
$('#display_gravity').text(GRAVITY);
$('#display_resistance').text(RESISTANCE);
$('#display_stopvel').text(STOPVEL);
$('#display_stopacc').text(STOPACC);
$('#display_bounce').text(BOUNCE);
var windowSize = new Vector2($(window).width(), $(window).height());
$.each(entities, function(i, entity){
var springForce = function(i, j) {
var d = i.sub(j);
var len = d.length();
return len > SEGLEN ? d.div(len).mul(SPRINGK).mul(len - SEGLEN) : new Vector2();
}
var spring = springForce(i > 0 ? entities[i - 1].position : mousePosition, entity.position);
if (i < (entities.length - 1)) {
spring = spring.add(springForce(entities[i + 1].position, entity.position));
}
var resist = entity.speed.mul(-RESISTANCE);
var accel = spring.add(resist).div(MASS).add(0, GRAVITY);
entity.speed = entity.speed.add(accel.mul(DELTAT));
if (Math.abs(entity.speed.getX()) < STOPVEL &&
Math.abs(entity.speed.getY()) < STOPVEL &&
Math.abs(accel.getX()) < STOPACC &&
Math.abs(accel.getY()) < STOPACC) {
entity.speed = new Vector2();
}
entity.position = entity.position.add(entity.speed);
if(collisionLeft) {
if (entity.position.getX() < 0) {
if (entity.speed.getX() < 0) {
entity.speed.setX(BOUNCE * -entity.speed.getX());
}
entity.position.setX(0);
}
}
if(collisionUp) {
if (entity.position.getY() < 0) {
if (entity.speed.getY() < 0) {
entity.speed.setY(BOUNCE * -entity.speed.getY());
}
entity.position.setY(0);
}
}
if(collisionRight) {
if (entity.position.getX() >= windowSize.getX() - entity.elem.width()) {
if (entity.speed.getX() > 0) {
entity.speed.setX(BOUNCE * -entity.speed.getX());
}
entity.position.setX(windowSize.getX() - entity.elem.width());
}
}
if(collisionDown) {
if (entity.position.getY() >= windowSize.getY() - entity.elem.height()) {
if (entity.speed.getY() > 0) {
entity.speed.setY(BOUNCE * -entity.speed.getY());
}
entity.position.setY(windowSize.getY() - entity.elem.height());
}
}
entity.elem.css({
'left': entity.position.getX(),
'top': entity.position.getY()
});
entity.columns.position.text(Math.round(entity.position.getX()) + ', ' + Math.round(entity.position.getY()));
entity.columns.speed.text(Math.round(entity.speed.getX()) + ', ' + Math.round(entity.speed.getY()));
});
}, 20);
});