var WINDOW_WIDTH = 1024;
var WINDOW_HEIGHT =768;
var RADIUS = 6;
var MARGIN_TOP = 30;
var MARGIN_LEFT = 60;
const endTime = new Date(2016,1,27,12,30,30);
var curShowTime = 0;
var balls = [];
const colors = ["#073155","#FFCE43","#DD5044","#00D2DC","#9C642D","#FFB439","#A6E22E","#FF1B2D"];
window.onload = function(){
var canvas = document.getElementById("canvas");
canvas.width = WINDOW_WIDTH;
canvas.height = WINDOW_HEIGHT;
var context = canvas.getContext("2d");
curShowTime = getCurShowTime();
setInterval(function(){
render(context);
update();
},50);
}
function getCurShowTime(){
var curTime = new Date();
var ret = endTime.getTime() - curTime.getTime();
ret = Math.round(ret/1000);
return ret >= 0 ? ret : 0;
}
function update(){
var nextShowTime = getCurShowTime();
var nextHours = parseInt(nextShowTime/3600);
var nextMinutes = parseInt(nextShowTime/60%60);
var nextSeconds = parseInt(nextShowTime%60);
var curHours = parseInt(curShowTime/3600);
var curMinutes = parseInt(curShowTime/60%60);
var curSeconds = parseInt(curShowTime%60);
if(nextSeconds != curSeconds){
//生成小球发生在数字改变的位置
if(parseInt(curHours/10) != parseInt(nextHours/10)){
addBalls(MARGIN_LEFT+0, MARGIN_TOP, parseInt(curHours/10));
}
if(parseInt(curHours%10) != parseInt(nextHours%10)){
addBalls(MARGIN_LEFT+15*(RADIUS+1), MARGIN_TOP, parseInt(curHours%10));
}
if(parseInt(curMinutes/10) != parseInt(nextMinutes/10)){
addBalls(MARGIN_LEFT+39*(RADIUS+1), MARGIN_TOP, parseInt(curMinutes/10));
}
if(parseInt(curMinutes%10) != parseInt(nextMinutes%10)){
addBalls(MARGIN_LEFT+54*(RADIUS+1), MARGIN_TOP, parseInt(curMinutes%10));
}
if(parseInt(curSeconds/10) != parseInt(nextSeconds/10)){
addBalls(MARGIN_LEFT+78*(RADIUS+1), MARGIN_TOP, parseInt(curSeconds/10));
}
if(parseInt(curSeconds%10) != parseInt(nextSeconds%10)){
addBalls(MARGIN_LEFT+93*(RADIUS+1), MARGIN_TOP, parseInt(curSeconds%10));
}
curShowTime = nextShowTime;
}
updateBalls();
}
function updateBalls(){
for (var i = 0; i < balls.length; i++) {
balls[i].x += balls[i].vx;
balls[i].y += balls[i].vy;
balls[i].vy += balls[i].g;
if(balls[i].y >= WINDOW_HEIGHT - RADIUS){
balls[i].y = WINDOW_HEIGHT - RADIUS;
balls[i].vy = -balls[i].vy*0.5;
}
}
}
function addBalls(x, y, num){
for(var i=0;i<digit[num].length;i++){
for(var j=0;j<digit[num][i].length;j++){
if(digit[num][i] ==1){
var aBall = {
x:x+j*2*(RADIUS+1)+(RADIUS+1),
y:y+i*2*(RADIUS+1)+(RADIUS+1),
g:1.5+Math.random(),
vx:Math.pow(-1, Math.ceil(Math.random()*1000))*4,
vy:-5,
color:colors[Math.floor(Math.randm()*colors.length)]
};
balls.push(aBall);
}
}
}
}
function render(cxt){
cxt.clearRect(0,0,WINDOW_WIDTH,WINDOW_HEIGHT); //刷新矩形
var hours = parseInt(curShowTime/3600);
var minutes = parseInt(curShowTime/60%60);
var seconds = parseInt(curShowTime%60);
renderDigit(MARGIN_LEFT, MARGIN_TOP, parseInt(hours/10), cxt);
renderDigit(MARGIN_LEFT+15*(RADIUS+1), MARGIN_TOP, parseInt(hours%10), cxt);
renderDigit(MARGIN_LEFT+30*(RADIUS+1), MARGIN_TOP, 10, cxt);
renderDigit(MARGIN_LEFT+39*(RADIUS+1), MARGIN_TOP, parseInt(minutes/10), cxt);
renderDigit(MARGIN_LEFT+54*(RADIUS+1), MARGIN_TOP, parseInt(minutes%10), cxt);
renderDigit(MARGIN_LEFT+69*(RADIUS+1), MARGIN_TOP, 10, cxt);
renderDigit(MARGIN_LEFT+78*(RADIUS+1), MARGIN_TOP, parseInt(seconds/10), cxt);
renderDigit(MARGIN_LEFT+93*(RADIUS+1), MARGIN_TOP, parseInt(seconds%10), cxt);
for (var i = 0; i < balls.length; i++) {
cxt.fillStyle = balls[i].color;
cxt.beginPath();
cxt.arc(balls[i].x, balls[i].y, RADIUS, 0, 2*Math.PI, true);
cxt.closePath();
cxt.fill();
}
}
function renderDigit(x, y, num, cxt){
cxt.fillStyle = "rgb(0, 102, 153)";
for (var i = 0; i < digit[num].length; i++) {
for (var j = 0; j < digit[num][i].length; j++) {
if(digit[num][i][j] == 1){
cxt.beginPath();
cxt.arc(x+j*2*(RADIUS+1)+(RADIUS+1), y+i*2*(RADIUS+1)+(RADIUS+1), RADIUS, 0, 2*Math.PI );
cxt.closePath();
cxt.fill();
}
}
}
}