305 行
9.3 KiB
JavaScript
305 行
9.3 KiB
JavaScript
// Copyright 2011 David Galles, University of San Francisco. All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without modification, are
|
|
// permitted provided that the following conditions are met:
|
|
//
|
|
// 1. Redistributions of source code must retain the above copyright notice, this list of
|
|
// conditions and the following disclaimer.
|
|
//
|
|
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
|
|
// of conditions and the following disclaimer in the documentation and/or other materials
|
|
// provided with the distribution.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
|
// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
|
|
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
// The views and conclusions contained in the software and documentation are those of the
|
|
// authors and should not be interpreted as representing official policies, either expressed
|
|
// or implied, of the University of San Francisco
|
|
|
|
|
|
function HeapSort(am)
|
|
{
|
|
this.init(am);
|
|
|
|
}
|
|
|
|
HeapSort.prototype = new Algorithm();
|
|
HeapSort.prototype.constructor = HeapSort;
|
|
HeapSort.superclass = Algorithm.prototype;
|
|
|
|
|
|
|
|
var ARRAY_SIZE = 32;
|
|
var ARRAY_ELEM_WIDTH = 30;
|
|
var ARRAY_ELEM_HEIGHT = 25;
|
|
var ARRAY_INITIAL_X = 30;
|
|
|
|
var ARRAY_Y_POS = 50;
|
|
var ARRAY_LABEL_Y_POS = 70;
|
|
|
|
|
|
HeapSort.prototype.init = function(am)
|
|
{
|
|
var sc = HeapSort.superclass;
|
|
var fn = sc.init;
|
|
fn.call(this,am);
|
|
this.addControls();
|
|
this.nextIndex = 0;
|
|
this.HeapXPositions = [0, 450, 250, 650, 150, 350, 550, 750, 100, 200, 300, 400, 500, 600,
|
|
700, 800, 075, 125, 175, 225, 275, 325, 375, 425, 475, 525, 575,
|
|
625, 675, 725, 775, 825];
|
|
this.HeapYPositions = [0, 100, 170, 170, 240, 240, 240, 240, 310, 310, 310, 310, 310, 310,
|
|
310, 310, 380, 380, 380, 380, 380, 380, 380, 380, 380, 380, 380,
|
|
380, 380, 380, 380, 380];
|
|
this.commands = [];
|
|
this.createArray();
|
|
|
|
|
|
/*this.nextIndex = 0;
|
|
this.commands = [];
|
|
this.cmd("CreateLabel", 0, "", 20, 50, 0);
|
|
this.animationManager.StartNewAnimation(this.commands);
|
|
this.animationManager.skipForward();
|
|
this.animationManager.clearHistory(); */
|
|
|
|
}
|
|
|
|
|
|
|
|
HeapSort.prototype.addControls = function()
|
|
{
|
|
this.randomizeArrayButton = addControlToAlgorithmBar("Button", "Randomize Array");
|
|
this.randomizeArrayButton.onclick = this.randomizeCallback.bind(this);
|
|
this.heapsortButton = addControlToAlgorithmBar("Button", "Heap Sort");
|
|
this.heapsortButton.onclick = this.heapsortCallback.bind(this);
|
|
}
|
|
|
|
|
|
HeapSort.prototype.createArray = function()
|
|
{
|
|
this.arrayData = new Array(ARRAY_SIZE);
|
|
this.arrayLabels = new Array(ARRAY_SIZE);
|
|
this.arrayRects = new Array(ARRAY_SIZE);
|
|
this.circleObjs = new Array(ARRAY_SIZE);
|
|
this.ArrayXPositions = new Array(ARRAY_SIZE);
|
|
this.oldData = new Array(ARRAY_SIZE);
|
|
this.currentHeapSize = 0;
|
|
|
|
for (var i = 1; i < ARRAY_SIZE; i++)
|
|
{
|
|
this.arrayData[i] = Math.floor(1 + Math.random()*999);
|
|
this.oldData[i] = this.arrayData[i];
|
|
|
|
this.ArrayXPositions[i] = ARRAY_INITIAL_X + i *ARRAY_ELEM_WIDTH;
|
|
this.arrayLabels[i] = this.nextIndex++;
|
|
this.arrayRects[i] = this.nextIndex++;
|
|
this.circleObjs[i] = this.nextIndex++;
|
|
this.cmd("CreateRectangle", this.arrayRects[i], this.arrayData[i], ARRAY_ELEM_WIDTH, ARRAY_ELEM_HEIGHT, this.ArrayXPositions[i] , ARRAY_Y_POS)
|
|
this.cmd("CreateLabel", this.arrayLabels[i], i - 1, this.ArrayXPositions[i], ARRAY_LABEL_Y_POS);
|
|
this.cmd("SetForegroundColor", this.arrayLabels[i], "#0000FF");
|
|
}
|
|
this.swapLabel1 = this.nextIndex++;
|
|
this.swapLabel2 = this.nextIndex++;
|
|
this.swapLabel3 = this.nextIndex++;
|
|
this.swapLabel4 = this.nextIndex++;
|
|
this.descriptLabel1 = this.nextIndex++;
|
|
this.descriptLabel2 = this.nextIndex++;
|
|
this.cmd("CreateLabel", this.descriptLabel1, "", 20, 40, 0);
|
|
//this.cmd("CreateLabel", this.descriptLabel2, "", this.nextIndex, 40, 120, 0);
|
|
this.animationManager.StartNewAnimation(this.commands);
|
|
this.animationManager.skipForward();
|
|
this.animationManager.clearHistory();
|
|
}
|
|
|
|
|
|
|
|
HeapSort.prototype.heapsortCallback = function(event)
|
|
{
|
|
this.commands = this.buildHeap("");
|
|
for (var i = ARRAY_SIZE - 1; i > 1; i--)
|
|
{
|
|
this.swap(i, 1);
|
|
this.cmd("SetAlpha", this.arrayRects[i], 0.2);
|
|
this.cmd("Delete", this.circleObjs[i]);
|
|
this.currentHeapSize = i-1;
|
|
this.pushDown(1);
|
|
}
|
|
for (i = 1; i < ARRAY_SIZE; i++)
|
|
{
|
|
this.cmd("SetAlpha", this.arrayRects[i], 1);
|
|
}
|
|
this.cmd("Delete", this.circleObjs[1]);
|
|
this.animationManager.StartNewAnimation(this.commands);
|
|
}
|
|
|
|
|
|
HeapSort.prototype.randomizeCallback = function(ignored)
|
|
{
|
|
this.randomizeArray();
|
|
}
|
|
|
|
HeapSort.prototype.randomizeArray = function()
|
|
{
|
|
this.commands = new Array();
|
|
for (var i = 1; i < ARRAY_SIZE; i++)
|
|
{
|
|
this.arrayData[i] = Math.floor(1 + Math.random()*999);
|
|
this.cmd("SetText", this.arrayRects[i], this.arrayData[i]);
|
|
this.oldData[i] = this.arrayData[i];
|
|
}
|
|
this.animationManager.StartNewAnimation(this.commands);
|
|
this.animationManager.skipForward();
|
|
this.animationManager.clearHistory();
|
|
}
|
|
|
|
|
|
|
|
HeapSort.prototype.reset = function()
|
|
{
|
|
for (var i = 1; i < ARRAY_SIZE; i++)
|
|
{
|
|
|
|
this.arrayData[i]= this.oldData[i];
|
|
this.cmd("SetText", this.arrayRects[i],this.arrayData[i]);
|
|
}
|
|
this.commands = new Array();
|
|
}
|
|
|
|
|
|
HeapSort.prototype.swap = function(index1, index2)
|
|
{
|
|
this.cmd("SetText", this.arrayRects[index1], "");
|
|
this.cmd("SetText", this.arrayRects[index2], "");
|
|
this.cmd("SetText", this.circleObjs[index1], "");
|
|
this.cmd("SetText", this.circleObjs[index2], "");
|
|
this.cmd("CreateLabel", this.swapLabel1, this.arrayData[index1], this.ArrayXPositions[index1],ARRAY_Y_POS);
|
|
this.cmd("CreateLabel", this.swapLabel2, this.arrayData[index2], this.ArrayXPositions[index2],ARRAY_Y_POS);
|
|
this.cmd("CreateLabel", this.swapLabel3, this.arrayData[index1], this.HeapXPositions[index1],this.HeapYPositions[index1]);
|
|
this.cmd("CreateLabel", this.swapLabel4, this.arrayData[index2], this.HeapXPositions[index2],this.HeapYPositions[index2]);
|
|
this.cmd("Move", this.swapLabel1, this.ArrayXPositions[index2],ARRAY_Y_POS)
|
|
this.cmd("Move", this.swapLabel2, this.ArrayXPositions[index1],ARRAY_Y_POS)
|
|
this.cmd("Move", this.swapLabel3, this.HeapXPositions[index2],this.HeapYPositions[index2])
|
|
this.cmd("Move", this.swapLabel4, this.HeapXPositions[index1],this.HeapYPositions[index1])
|
|
var tmp = this.arrayData[index1];
|
|
this.arrayData[index1] = this.arrayData[index2];
|
|
this.arrayData[index2] = tmp;
|
|
this.cmd("Step")
|
|
this.cmd("SetText", this.arrayRects[index1], this.arrayData[index1]);
|
|
this.cmd("SetText", this.arrayRects[index2], this.arrayData[index2]);
|
|
this.cmd("SetText", this.circleObjs[index1], this.arrayData[index1]);
|
|
this.cmd("SetText", this.circleObjs[index2], this.arrayData[index2]);
|
|
this.cmd("Delete", this.swapLabel1);
|
|
this.cmd("Delete", this.swapLabel2);
|
|
this.cmd("Delete", this.swapLabel3);
|
|
this.cmd("Delete", this.swapLabel4);
|
|
|
|
|
|
}
|
|
|
|
|
|
HeapSort.prototype.setIndexHighlight = function(index, highlightVal)
|
|
{
|
|
this.cmd("SetHighlight", this.circleObjs[index], highlightVal);
|
|
this.cmd("SetHighlight", this.arrayRects[index], highlightVal);
|
|
}
|
|
|
|
HeapSort.prototype.pushDown = function(index)
|
|
{
|
|
var smallestIndex;
|
|
|
|
while(true)
|
|
{
|
|
if (index*2 > this.currentHeapSize)
|
|
{
|
|
return;
|
|
}
|
|
|
|
smallestIndex = 2*index;
|
|
|
|
if (index*2 + 1 <= this.currentHeapSize)
|
|
{
|
|
this.setIndexHighlight(2*index, 1);
|
|
this.setIndexHighlight(2*index + 1, 1);
|
|
this.cmd("Step");
|
|
this.setIndexHighlight(2*index, 0);
|
|
this.setIndexHighlight(2*index + 1, 0);
|
|
if (this.arrayData[2*index + 1] > this.arrayData[2*index])
|
|
{
|
|
smallestIndex = 2*index + 1;
|
|
}
|
|
}
|
|
this.setIndexHighlight(index, 1);
|
|
this.setIndexHighlight(smallestIndex, 1);
|
|
this.cmd("Step");
|
|
this.setIndexHighlight(index, 0);
|
|
this.setIndexHighlight(smallestIndex, 0);
|
|
|
|
if (this.arrayData[smallestIndex] > this.arrayData[index])
|
|
{
|
|
this.swap(smallestIndex, index);
|
|
index = smallestIndex;
|
|
}
|
|
else
|
|
{
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
}
|
|
}
|
|
|
|
HeapSort.prototype.buildHeap = function(ignored)
|
|
{
|
|
this.commands = new Array();
|
|
for (var i = 1; i < ARRAY_SIZE; i++)
|
|
{
|
|
this.cmd("CreateCircle", this.circleObjs[i], this.arrayData[i], this.HeapXPositions[i], this.HeapYPositions[i]);
|
|
this.cmd("SetText", this.arrayRects[i], this.arrayData[i]);
|
|
if (i > 1)
|
|
{
|
|
this.cmd("Connect", this.circleObjs[Math.floor(i/2)], this.circleObjs[i]);
|
|
}
|
|
|
|
}
|
|
this.cmd("Step");
|
|
this.currentHeapSize = ARRAY_SIZE - 1;
|
|
var nextElem = this.currentHeapSize;
|
|
while(nextElem > 0)
|
|
{
|
|
this.pushDown(nextElem);
|
|
nextElem = nextElem - 1;
|
|
}
|
|
return this.commands;
|
|
}
|
|
|
|
|
|
|
|
HeapSort.prototype.disableUI = function(event)
|
|
{
|
|
this.heapsortButton.disabled = true;
|
|
this.randomizeArrayButton.disabled = true;
|
|
}
|
|
|
|
HeapSort.prototype.enableUI = function(event)
|
|
{
|
|
this.heapsortButton.disabled = false;
|
|
this.randomizeArrayButton.disabled = false;
|
|
}
|
|
|
|
|
|
var currentAlg;
|
|
|
|
function init()
|
|
{
|
|
var animManag = initCanvas();
|
|
currentAlg = new HeapSort(animManag, canvas.width, canvas.height);
|
|
} |