JavaScript

语言：

JaveScriptBabelCoffeeScript

确定

$(function() {

// Console Log

function cl($m) {

console.log($m);

}

// Utility Console Log

var sp = ', ';

var br = '
';

var first = true;

var canvas = document.getElementById('myCanvas');

var context = canvas.getContext('2d');

var x, y, oldX, oldY;

var fronte = false;

var st = 40; // S-pessore T-rama : Distanza tra i buchi in cui far passare il filo

var story = [];

// Impostazione filo

var filo = {

w: 5,

color: '#fff',

cap: 'round',

join: 'round',

shColor: 'rgba(0,0,0,.4)',

shBlur: 8,

shOffX: 2,

shOffY: 2,

dash: [0]

};

var filoRetro = {

w: 5,

color: 'rgba(0,0,0,.07)',

//dash : [5, 10] // Tratteggiato

dash: [0]

};

function setFiloFronte($context) {

$context.strokeStyle = filo.color;

$context.setLineDash(filo.dash);

$context.lineWidth = filo.w;

}

function setFiloRetro($context) {

$context.strokeStyle = filoRetro.color;

$context.setLineDash(filoRetro.dash);

$context.lineWidth = filoRetro.w;

}

function toggleFronteRetro($context) {

if (fronte) {

setFiloFronte($context);

} else {

setFiloRetro($context);

}

}

function initContext() {

context.lineWidth = filo.w;

context.lineCap = filo.cap;

context.lineJoin = filo.join;

context.strokeStyle = filo.color;

context.shadowColor = filo.shColor;

context.shadowBlur = filo.shBlur;

context.shadowOffsetX = filo.shOffX;

context.shadowOffsetY = filo.shOffY;

}

function drawBG() {

var imageObj = new Image();

imageObj.onload = function() {

var pattern = context.createPattern(imageObj, 'repeat');

context.rect(0, 0, canvas.width, canvas.height);

context.fillStyle = pattern;

context.fill();

};

imageObj.src = 'img/foro.png';

}

function log($t) {

document.getElementById("log").innerHTML = $t;

}

function clearCanvas() {

context.clearRect(0, 0, canvas.width, canvas.height);

first = true;

fronte = false;

}

function points() {

var oldX = story[story.length - 2][0];

var newX = story[story.length - 1][0];

var oldY = story[story.length - 2][1];

var newY = story[story.length - 1][1];

var deltaX = Math.abs(oldX - newX);

var deltaY = Math.abs(oldY - newY);

function good() {

cl('good')

$('#points').text('Well done, kiddo!').attr('class', 'ok');

$('#avatar').attr('class', 'ok');

}

function bad() {

$('#points').text('Oh, not like that...').attr('class', 'no');

$('#avatar').attr('class', 'no');

}

if (fronte) {

if (deltaX === st && deltaY === st) {

good();

} else {

bad();

}

} else {

if (deltaX === 0 && deltaY === st) {

good();

} else {

bad();

}

}

}

/* Event assignments */

$('canvas').on('click', function(event) {

x = (Math.round(event.pageX / st)) * st;

y = (Math.round(event.pageY / st)) * st;

story.push([x, y]);

// Primo click

if (first) {

first = false;

} else {

context.beginPath();

context.moveTo(oldX, oldY);

context.lineTo(x, y);

// Inverte il verso del filo

toggleFronteRetro(context);

// Disegna il tratto

context.stroke();

// Calcola il punteggio

points();

}

// Update vars

oldX = x;

oldY = y;

fronte = !fronte;

//log(+ x + ', ' + y);

}).on('mousemove', function(event) {

var x = (Math.round(event.pageX / st)) * st - 5;

var y = (Math.round(event.pageY / st)) * st - 4;

$('#cursor').css({

'left': x + 'px',

'top': y + 'px'

});

});

$('#endPath').on('click', function(event) {

first = true;

});

$('.colors a').on('click', function(event) {

filo.color = $(this).css('background-color')

$('.colors a').removeClass('active');

$(this).addClass('active');

});

$('#reset').on('click', function(event) {

clearCanvas();

});

$('#replay').on('click', function(event) {

clearCanvas();

fronte = false;

setFiloFronte(context);

for (i = 0; i < (story.length - 1); i++) {

context.beginPath();

context.moveTo(story[i][0], story[i][1]);

context.lineTo(story[i + 1][0], story[i + 1][1]);

context.stroke();

toggleFronteRetro(context);

fronte = !fronte;

}

//setTimeout(function(){

/*for(i=1; i

cl(story[1][0] + sp + story[1][1]);

//context.lineTo(story[i][0], story[i][1]);

}, 500);

}*/

});

window.requestAnimFrame = (function(callback) {

return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(callback) {

window.setTimeout(callback, 1000 / 60);

};

})();

function drawLine(myLine, contextFilo) {

contextFilo.beginPath();

contextFilo.moveTo(myLine.a[0], myLine.a[1]);

contextFilo.quadraticCurveTo(myLine.a1[0], myLine.a1[1], myLine.b[0], myLine.b[1]);

contextFilo.lineCap = filo.cap;

contextFilo.lineJoin = filo.join;

contextFilo.shadowColor = filo.shColor;

contextFilo.shadowBlur = filo.shBlur;

contextFilo.shadowOffsetX = filo.shOffX;

contextFilo.shadowOffsetY = filo.shOffY;

contextFilo.stroke();

}

function animateLine(myRectangle, canvasFilo, contextFilo) {

var distX = Math.round((myLine.b[0] - myLine.a[0]) / 2);

var distY = Math.round((myLine.b[1] + myLine.a[1]) / 2);

myLine.a[0] = x || myLine.a[0];

myLine.a[1] = y || myLine.a[1];

myLine.b[0] = mX || 0;

myLine.b[1] = mY || 0;

// Punto intermedio

myLine.a1[0] = myLine.a[0] + distX;

myLine.a1[1] = distY + 500;

toggleFronteRetro(contextFilo);

// clear

contextFilo.clearRect(0, 0, canvasFilo.width, canvasFilo.height);

// Redraw

drawLine(myLine, contextFilo);

// request new frame

requestAnimFrame(function() {

animateLine(myLine, canvasFilo, contextFilo);

});

}

var canvasFilo = document.getElementById('filo');

var contextFilo = canvasFilo.getContext('2d');

var myLine = {

a: [161, 201],

a1: [150, 150],

b: [mX, mY]

};

var mX, mY;

$('canvas').on('mousemove', function(ev) {

mX = ev.pageX;

mY = ev.pageY;

$('.l2').html(mX + ', ' + mY + '
' + myLine.a + ', ' + myLine.a1 + ', ' + myLine.b);

});

//drawRectangle(myRectangle, contextFilo);

$(function() {

//drawLine(myLine, contextFilo);

animateLine(myLine, canvasFilo, contextFilo);

});

// wait one second before starting animation

/*setTimeout(function () {

var startTime = (new Date()).getTime();

//animate(myRectangle, canvasFilo, contextFilo, startTime);

animateLine(myLine, canvasFilo, contextFilo, startTime);

}, 1000);*/

initContext();

});