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tet.html
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<!doctype HTML>
<html>
<head>
<title>title</title>
<!-- <meta http-equiv="refresh" content="1; url=http://github.com/erikvold/view-page-source-in-tab-jetpack"> -->
</head>
<body>
<canvas id='canvas' width='300' height='500'
onmousedown='onMousedown(event)'
onmousemove='onMousemove(event)'></canvas>
<canvas id='side-canvas' width='30' height='50' onclick='previewPane.click(event)'></canvas>
<br>
<a href='http://www.nihilogic.dk/labs/canvas_sheet/HTML5_Canvas_Cheat_Sheet.pdf' target='_blank'>help</a>
</body>
<style>
canvas{
border: 1px solid DarkGray;
vertical-align: top;
}
</style>
<script>
viewPort ={
row: 0,
offsetY: 0,
cellSize: 20,
pixelWidth: 10 ,
pixelHeight: 10,
getFirstVisibleRow: function(){
return this.row
},
getLastVisibleRow: function(){
return this.row + Math.ceil((this.pixelHeight+this.offsetY)/this.cellSize)
},
toScreenCoordinates: function(i, j){
return [this.cellSize * i, this.cellSize * j - this.offsetY]
},
toPitCoordinates: function(x, y){
return {i:Math.floor(x / this.cellSize), j:this.row + Math.floor((y + this.offsetY)/this.cellSize)}
},
setSizeFromCanvas: function(canvas){
this.pixelWidth = canvas.width
this.pixelHeight = canvas.height
this.cellSize = Math.round(this.pixelWidth/pit.colNum)
},
clear: function() {
ctx.clearRect(0, 0, this.pixelWidth, this.pixelHeight);
},
moveByPixel: function(dy){
this.offsetY += dy
var dRows = Math.floor(this.offsetY / this.cellSize)
this.row += dRows
this.offsetY -= dRows*this.cellSize
},
init: function(){
this.canvas = $('canvas')
this.ctx = this.canvas.getContext('2d')
canvasRect = this.canvas.getBoundingClientRect()
viewPort.setSizeFromCanvas(this.canvas)
}
}
pit = {
colNum: 15,
init: function(lineNum){
for (var i = 7; i--;)
this.rows[i] = this.generateEmptyRow()
},
rows: [],
generateEmptyRow: function(){
var row = []
for (var i = this.colNum; i--;)
row[i] = tiles.empty
return row
},
generateRow: function(lineNum){
var row = []
var prevRow = this.rows[lineNum-1]
if(!prevRow)
return this.generateEmptyRow()
var emptyAdded = false
for (var i = this.colNum; i--;) {
var goldP = 0.1, emptyP = 0.32 + 0.3 * Math.sin(lineNum*3.14/20 );
if(prevRow[i] == tiles.gold)
emptyP = 0
else if(prevRow[i] == tiles.empty)
emptyP = 0.4
var p = Math.random()
if (p < goldP)
row[i] = tiles.gold
else if (p < goldP + emptyP){
row[i] = tiles.empty
emptyAdded = true
}else
row[i] = tiles.normal
}
if(!emptyAdded){
i = Math.floor(Math.random()*this.colNum)
row[i] = tiles.empty
}
return row
},
draw: function(x, y, dx, dy){
var first = viewPort.getFirstVisibleRow()
var last = viewPort.getLastVisibleRow()
var h = last - first
var xMax = this.colNum * viewPort.cellSize
var y = - viewPort.offsetY - viewPort.cellSize;
for(var j = 0; j < h+1; j++){
y += viewPort.cellSize
var row = this.rows[j+first] || (this.rows[j+first] = this.generateRow(j+first))
var x = xMax;
for (i = this.colNum; i--;){
x -= viewPort.cellSize
row[i] && row[i].draw(x, y)
}
}
}
}
tiles = {
normal: {
r: viewPort.cellSize - 2,
draw: function(x, y, dx, dy){
ctx.fillStyle='#5c5cdd'
rect(x, y, this.r, this.r)
},
toString: function(){
return 'x'
}
},
blood: {
color: 'red',
r: viewPort.cellSize - 2,
draw: function(x, y, dx, dy){
ctx.fillStyle = this.color
rect(x, y, this.r, this.r)
},
toString: function(){
return 'b'
}
},
empty: undefined,
gold: {
r: viewPort.cellSize / 2 - 1,
draw: function(x, y, dx, dy){
ctx.fillStyle='gold'
circle(x+this.r, y+this.r, this.r)
},
toString: function(){
return 'g'
}
},
}
/*********************************************/
tet = {
pit: pit,
removeLine: function(j) {
this.pit.rows.splice(j,1)
this.pit.rows.unshift(pit.generateEmptyRow())
},
checkForFullLines: function(topRow, startRow){
if(topRow == null)
topRow = viewPort.getFirstVisibleRow()
if(startRow == null)
startRow= viewPort.getLastVisibleRow()
var rows = this.pit.rows
var multiplier = 1
for (var j = startRow; j >= topRow; j--) {
console.log(j, rows[j].length != 0, rows[j].indexOf(tiles.empty))
if (rows[j].length != 0 && rows[j].indexOf(tiles.empty) == -1){
console.log(j, rows[j])
multiplier++
this.removeLine(j)
j++
}
}
},
collapse: function(startRow) {
var topRow = viewPort.row
if(topRow > startRow)
return; // error
for (var i = 0; i < pit.colNum; i++){
this.collapseColumn(i, startRow)
}
this.checkForFullLines(topRow, startRow)
},
collapseColumn: function(col, startRow){
var rows = this.pit.rows
var topRow = viewPort.row
if(topRow > startRow)
return; // error
var emptySpace = 0
for (var j = startRow; j >= topRow; j--) {
var el = rows[j][col]
if(el == tiles.empty)
emptySpace++
else if(el == tiles.gold && emptySpace > 1){
rows[j][col] = tiles.empty
emptySpace++
} else {
rows[j][col] = rows[j+emptySpace][col]
rows[j+emptySpace][col] = el
}
}
},
element: null,
init: function(){
this.element = new Block([], 0)
this.getNextBlock()
},
getNextBlock: function(){
this.element.setGrid(previewPane.genereteElement())
this.element.row = viewPort.row
this.element.col = 5
},
setElementIntoPit: function(){
var block = this.element
var view = viewPort
for each(var el in block.grid){
var i = el[0], j = el[1]
pit.rows[j+block.row][i+block.col] = tiles.normal
}
this.getNextBlock()
this.checkForFullLines()
},
rotateElement: function(){
var block = this.element
for each(var el in block.grid){
var i = el[0], j = el[1]
el[0] = -j
el[1] = i
}
},
}
/*********************************************/
previewPane = {
row: 0,
offsetY: 0,
init: function() {
this.cellSize = viewPort.cellSize
this.canvas = $('side-canvas')
this.ctx = this.canvas.getContext('2d')
this.canvas.width =
this.canvas.height = this.cellSize * 5
this.genereteElement()
},
removeLine: function(j) {
this.pit.rows.splice(j,1)
this.pit.rows.unshift([])
},
draw: function(){
ctx = this.ctx
ctx.clearRect(0, 0, this.cellSize * 5, this.cellSize * 5);
this.element.draw(10, 10, this)
ctx = viewPort.ctx
},
click: function(e){
this.genereteElement()
},
genereteElement: function(){
var el = this.element
var i = (Math.random()*blockTypes.length)<<0
this.element = blockTypes[i]
this.draw()
return el
},
}
/******* lib ********************/
$ = function(x){
return document.getElementById(x)
}
function circle(x,y,r) {
ctx.beginPath();
ctx.arc(x, y, r, 0, Math.PI*2, true);
ctx.closePath();
ctx.fill();
}
function rect(x,y,w,h) {
ctx.beginPath();
ctx.rect(x,y,w,h);
ctx.closePath();
ctx.fill();
}
//*****************************
if (window.mozRequestAnimationFrame){
AnimationStartTime = "mozAnimationStartTime"
RequestAnimationFrame = "mozRequestAnimationFrame"
}else{
AnimationStartTime = "webkitAnimationStartTime"
RequestAnimationFrame = "webkitRequestAnimationFrame"
}
/******* main ********************/
var v = 0
function draw() {
var t = window[AnimationStartTime]
var dt = t - viewPort.lastT
viewPort.lastT = t
ctx = viewPort.ctx
viewPort.clear();
viewPort.moveByPixel(v*dt)
tet.pit.draw()
tet.element.draw(0, 0, viewPort)
window[RequestAnimationFrame](draw)
}
viewPort.lastT = window.mozAnimationStartTime
function onMousemove(e) {return
var x = e.clientX - canvasRect.left
var y = e.clientY - canvasRect.top
var p = viewPort.toPitCoordinates(x, y)
pit.rows[p.j][p.i] = tiles.blood
}
function onMousedown(e){
var x = e.clientX - canvasRect.left
var y = e.clientY - canvasRect.top
var p = viewPort.toPitCoordinates(x, y)
if(e.button == 1){
tiles.blood.color = tiles.blood.color=='red'?'green':'red'
tet.removeLine(p.j)
} else if(e.button == 0){
tiles.blood.color = 'green'
tet.collapse(p.j)
}
}
var oldX, oldY, color = 0
function drawLine(x, y) {
ctx.strokeStyle='rgba(0,0,250,0.5)'
ctx.moveTo(oldX, oldY)
ctx.lineTo(x,y)
ctx.stroke()
oldX = y;
oldY = x;
}
function init() {
pit.init()
viewPort.init()
previewPane.init()
tet.init()
draw()
}
window.addEventListener('keydown', function(e){
if(e.keyCode == KeyEvent.DOM_VK_CONTROL)
return
if(e.keyCode == KeyEvent.DOM_VK_W)
v = 30 / 1000
else if(e.keyCode == KeyEvent.DOM_VK_S)
v = -30 / 1000
else
v = 0
if(e.ctrlKey)
v = 10 * v
if(e.keyCode == KeyEvent.DOM_VK_DOWN)
tet.element.row++
else if(e.keyCode == KeyEvent.DOM_VK_RIGHT)
tet.element.col++
else if(e.keyCode == KeyEvent.DOM_VK_LEFT)
tet.element.col--
else if(e.keyCode == KeyEvent.DOM_VK_UP)
tet.rotateElement(1)
else if(e.keyCode == KeyEvent.DOM_VK_RETURN)
tet.setElementIntoPit()
e.preventDefault()
e.stopPropagation()
}, false)
function Block(mat, n){
this.grid = []
var x = 0, y = 0
for (var i=0; i<mat.length; i++){
if (mat[i]){
this.grid.push([x, y])
}
x++
if(x == n){
x = 0
y++
}
}
}
Block.prototype = {
row: 0,
col: 0,
grid: [],
toString: function(){
var array = []
for(var i=0;i<5;i++){
var sub = []
for(var j=0;j<5;j++)
sub[j] = "."
array[i] = sub
}
for each(var el in this.grid){
var i = el[0]
var j = el[1]
array[i][j] = '#'
}
return array.map(function(x)x.join("")).join('\n')
},
draw: function(x, y, view){
var cs = view.cellSize
for each(var el in this.grid){
var i = el[0], j = el[1]
tiles.normal.draw(cs*(i + this.col)+x, cs*(j+this.row-view.row)+y-view.offsetY)
}
},
setGrid: function(block){
this.grid = block.grid
}
}
blockTypes = [
new Block([
0, 1, 1,
1, 1, 0
], 3),
new Block([
1, 1, 1,
0, 1, 0
], 3),
new Block([
1, 1, 1,
0, 1, 0
], 3),
new Block([
1, 1, 1,
0, 1, 0,
0, 1, 0
], 3),
new Block([
0, 1, 0,
1, 1, 1,
0, 1, 0
], 3),
new Block([
1, 1, 0,
0, 1, 0,
0, 1, 1
], 3)
]
/*************************************************************/
init()
</script>
</html>