325 行
11 KiB
JavaScript
325 行
11 KiB
JavaScript
// Copyright 2011 David Galles, University of San Francisco. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other materials
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// provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND ANY EXPRESS OR IMPLIED
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// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// The views and conclusions contained in the software and documentation are those of the
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// authors and should not be interpreted as representing official policies, either expressed
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// or implied, of the University of San Francisco
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function CountingSort(am, w, h)
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{
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this.init(am, w, h);
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}
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var ARRAY_ELEM_WIDTH = 30;
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var ARRAY_ELEM_HEIGHT = 30;
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var ARRAY_ELEM_START_X = 20;
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var COUNTER_ARRAY_ELEM_WIDTH = 30;
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var COUNTER_ARRAY_ELEM_HEIGHT = 30;
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var COUNTER_ARRAY_ELEM_START_X = 20;
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var MAX_DATA_VALUE = 30;
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var COUNTER_ARRAY_SIZE = MAX_DATA_VALUE + 1;
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var ARRAY_SIZE = 30;
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CountingSort.prototype = new Algorithm();
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CountingSort.prototype.constructor = CountingSort;
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CountingSort.superclass = Algorithm.prototype;
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CountingSort.prototype.init = function(am, w, h)
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{
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this.ARRAY_ELEM_Y = 3 * COUNTER_ARRAY_ELEM_HEIGHT;
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this.COUNTER_ARRAY_ELEM_Y = Math.floor(h / 2);
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this.SWAP_ARRAY_ELEM_Y = h - 3 * COUNTER_ARRAY_ELEM_HEIGHT
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var sc = CountingSort.superclass;
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var fn = sc.init;
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fn.call(this,am,w,h);
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this.addControls();
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this.nextIndex = 0;
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this.setup();
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}
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CountingSort.prototype.sizeChanged = function(newWidth, newHeight)
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{
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this.ARRAY_ELEM_Y = 3 * COUNTER_ARRAY_ELEM_HEIGHT;
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this.COUNTER_ARRAY_ELEM_Y = Math.floor(newHeight / 2);
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this.SWAP_ARRAY_ELEM_Y = newHeight - 3 * COUNTER_ARRAY_ELEM_HEIGHT
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this.setup();
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}
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CountingSort.prototype.addControls = function()
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{
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this.resetButton = addControlToAlgorithmBar("Button", "Randomize List");
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this.resetButton.onclick = this.resetCallback.bind(this);
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this.countingsSortButton = addControlToAlgorithmBar("Button", "Counting Sort");
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this.countingsSortButton.onclick = this.countingSortCallback.bind(this);
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}
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CountingSort.prototype.setup = function()
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{
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this.arrayData = new Array(ARRAY_SIZE);
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this. arrayRects= new Array(ARRAY_SIZE);
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this. arrayIndices = new Array(ARRAY_SIZE);
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this. counterData = new Array(COUNTER_ARRAY_SIZE);
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this. counterRects= new Array(COUNTER_ARRAY_SIZE);
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this. counterIndices = new Array(COUNTER_ARRAY_SIZE);
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this. swapData = new Array(ARRAY_SIZE);
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this. swapRects= new Array(ARRAY_SIZE);
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this. swapIndices = new Array(ARRAY_SIZE);
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this. commands = new Array();
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this.animationManager.resetAll();
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for (var i = 0; i < ARRAY_SIZE; i++)
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{
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var nextID = this.nextIndex++;
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this.arrayData[i] = Math.floor(Math.random()*MAX_DATA_VALUE);
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this.cmd("CreateRectangle", nextID, this.arrayData[i], ARRAY_ELEM_WIDTH, ARRAY_ELEM_HEIGHT, ARRAY_ELEM_START_X + i *ARRAY_ELEM_WIDTH, this.ARRAY_ELEM_Y)
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this. arrayRects[i] = nextID;
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nextID = this.nextIndex++;
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this. arrayIndices[i] = nextID;
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this.cmd("CreateLabel",nextID, i, ARRAY_ELEM_START_X + i *ARRAY_ELEM_WIDTH, this.ARRAY_ELEM_Y + ARRAY_ELEM_HEIGHT);
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this.cmd("SetForegroundColor", nextID, "#0000FF");
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nextID = this.nextIndex++;
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this.cmd("CreateRectangle", nextID, "", ARRAY_ELEM_WIDTH, ARRAY_ELEM_HEIGHT, ARRAY_ELEM_START_X + i *ARRAY_ELEM_WIDTH, this.SWAP_ARRAY_ELEM_Y)
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this. swapRects[i] = nextID;
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nextID = this.nextIndex++;
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this. swapIndices[i] = nextID;
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this.cmd("CreateLabel",nextID, i, ARRAY_ELEM_START_X + i *ARRAY_ELEM_WIDTH, this.SWAP_ARRAY_ELEM_Y + ARRAY_ELEM_HEIGHT);
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this.cmd("SetForegroundColor", nextID, "#0000FF");
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}
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for (i = COUNTER_ARRAY_SIZE - 1; i >= 0; i--)
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{
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nextID = this.nextIndex++;
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this.cmd("CreateRectangle", nextID,"", COUNTER_ARRAY_ELEM_WIDTH, COUNTER_ARRAY_ELEM_HEIGHT, COUNTER_ARRAY_ELEM_START_X + i *COUNTER_ARRAY_ELEM_WIDTH, this.COUNTER_ARRAY_ELEM_Y)
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this. counterRects[i] = nextID;
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nextID = this.nextIndex++;
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this. counterIndices[i] = nextID;
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this.cmd("CreateLabel",nextID, i, COUNTER_ARRAY_ELEM_START_X + i *COUNTER_ARRAY_ELEM_WIDTH, this.COUNTER_ARRAY_ELEM_Y + COUNTER_ARRAY_ELEM_HEIGHT);
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this.cmd("SetForegroundColor", nextID, "#0000FF");
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}
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this.animationManager.StartNewAnimation(this. commands);
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this.animationManager.skipForward();
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this.animationManager.clearHistory();
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}
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CountingSort.prototype.resetAll = function(small)
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{
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this.animationManager.resetAll();
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this.nextIndex = 0;
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}
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CountingSort.prototype.countingSortCallback = function(event)
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{
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this. commands = new Array();
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var animatedCircleID = this.nextIndex++;
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var animatedCircleID2 = this.nextIndex++;
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var animatedCircleID3 = this.nextIndex++;
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var animatedCircleID4 = this.nextIndex++;
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for (var i = 0; i < COUNTER_ARRAY_SIZE; i++)
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{
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this. counterData[i] = 0;
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this.cmd("SetText", this. counterRects[i], 0);
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}
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for (i = 0; i < ARRAY_SIZE; i++)
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{
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this.cmd("CreateHighlightCircle", animatedCircleID, "#0000FF", ARRAY_ELEM_START_X + i *ARRAY_ELEM_WIDTH, this.ARRAY_ELEM_Y);
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this.cmd("CreateHighlightCircle", animatedCircleID2, "#0000FF", ARRAY_ELEM_START_X + i *ARRAY_ELEM_WIDTH, this.ARRAY_ELEM_Y);
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var index = this.arrayData[i];
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this.cmd("Move", animatedCircleID, COUNTER_ARRAY_ELEM_START_X + index *COUNTER_ARRAY_ELEM_WIDTH, this.COUNTER_ARRAY_ELEM_Y + COUNTER_ARRAY_ELEM_HEIGHT)
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this.cmd("Step");
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this. counterData[index]++;
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this.cmd("SetText", this. counterRects[this.arrayData[i]], this. counterData[this.arrayData[i]]);
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this.cmd("Step");
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this.cmd("SetAlpha", this. arrayRects[i], 0.2);
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this.cmd("Delete", animatedCircleID);
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this.cmd("Delete", animatedCircleID2);
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}
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for (i=1; i < COUNTER_ARRAY_SIZE; i++)
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{
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this.cmd("SetHighlight", this. counterRects[i-1], 1);
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this.cmd("SetHighlight", this. counterRects[i], 1);
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this.cmd("Step")
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this. counterData[i] = this. counterData[i] + this. counterData[i-1];
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this.cmd("SetText", this. counterRects[i], this. counterData[i]);
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this.cmd("Step")
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this.cmd("SetHighlight", this. counterRects[i-1], 0);
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this.cmd("SetHighlight", this. counterRects[i], 0);
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}
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for (i=ARRAY_SIZE - 1; i >= 0; i--)
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{
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this.cmd("SetAlpha", this. arrayRects[i], 1.0);
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}
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for (i=ARRAY_SIZE - 1; i >= 0; i--)
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{
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this.cmd("CreateHighlightCircle", animatedCircleID, "#0000FF", ARRAY_ELEM_START_X + i *ARRAY_ELEM_WIDTH, this.ARRAY_ELEM_Y);
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this.cmd("CreateHighlightCircle", animatedCircleID2, "#0000FF", ARRAY_ELEM_START_X + i *ARRAY_ELEM_WIDTH, this.ARRAY_ELEM_Y);
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index = this.arrayData[i];
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this.cmd("Move", animatedCircleID2, COUNTER_ARRAY_ELEM_START_X + index *COUNTER_ARRAY_ELEM_WIDTH, this.COUNTER_ARRAY_ELEM_Y + COUNTER_ARRAY_ELEM_HEIGHT)
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this.cmd("Step");
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var insertIndex = --this. counterData[this.arrayData[i]];
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this.cmd("SetText", this. counterRects[this.arrayData[i]], this. counterData[this.arrayData[i]]);
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this.cmd("Step");
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this.cmd("CreateHighlightCircle", animatedCircleID3, "#AAAAFF", COUNTER_ARRAY_ELEM_START_X + index *COUNTER_ARRAY_ELEM_WIDTH, this.COUNTER_ARRAY_ELEM_Y);
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this.cmd("CreateHighlightCircle", animatedCircleID4, "#AAAAFF", COUNTER_ARRAY_ELEM_START_X + index *COUNTER_ARRAY_ELEM_WIDTH, this.COUNTER_ARRAY_ELEM_Y);
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this.cmd("Move", animatedCircleID4, ARRAY_ELEM_START_X + insertIndex * ARRAY_ELEM_WIDTH, this.SWAP_ARRAY_ELEM_Y + COUNTER_ARRAY_ELEM_HEIGHT)
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this.cmd("Step");
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var moveLabel = this.nextIndex++;
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this.cmd("SetText", this. arrayRects[i], "");
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this.cmd("CreateLabel", moveLabel, this.arrayData[i], ARRAY_ELEM_START_X + i *ARRAY_ELEM_WIDTH, this.ARRAY_ELEM_Y);
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this.cmd("Move", moveLabel, ARRAY_ELEM_START_X + insertIndex *ARRAY_ELEM_WIDTH, this.SWAP_ARRAY_ELEM_Y);
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this. swapData[insertIndex] = this.arrayData[i];
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this.cmd("Step");
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this.cmd("Delete", moveLabel);
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this.nextIndex--; // Reuse index from moveLabel, now that it has been removed.
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this.cmd("SetText", this. swapRects[insertIndex], this. swapData[insertIndex]);
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this.cmd("Delete", animatedCircleID);
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this.cmd("Delete", animatedCircleID2);
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this.cmd("Delete", animatedCircleID3);
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this.cmd("Delete", animatedCircleID4);
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}
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for (i= 0; i < ARRAY_SIZE; i++)
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{
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this.cmd("SetText", this. arrayRects[i], "");
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}
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for (i= 0; i < COUNTER_ARRAY_SIZE; i++)
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{
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this.cmd("SetAlpha", this. counterRects[i], 0.05);
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this.cmd("SetAlpha", this. counterIndices[i], 0.05);
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}
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this.cmd("Step");
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var startLab = this.nextIndex;
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for (i = 0; i < ARRAY_SIZE; i++)
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{
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this.cmd("CreateLabel", startLab+i, this. swapData[i], ARRAY_ELEM_START_X + i *ARRAY_ELEM_WIDTH, this.SWAP_ARRAY_ELEM_Y);
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this.cmd("Move", startLab+i, ARRAY_ELEM_START_X + i *ARRAY_ELEM_WIDTH, this.ARRAY_ELEM_Y);
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this.cmd("SetText", this. swapRects[i], "");
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}
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this.cmd("Step");
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for (i = 0; i < ARRAY_SIZE; i++)
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{
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this.arrayData[i] = this. swapData[i];
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this.cmd("SetText", this. arrayRects[i], this.arrayData[i]);
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this.cmd("Delete", startLab + i);
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}
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for (i= 0; i < COUNTER_ARRAY_SIZE; i++)
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{
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this.cmd("SetAlpha", this. counterRects[i], 1);
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this.cmd("SetAlpha", this. counterIndices[i], 1);
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}
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this.animationManager.StartNewAnimation(this. commands);
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}
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CountingSort.prototype.randomizeArray = function()
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{
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this. commands = new Array();
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for (var i = 0; i < ARRAY_SIZE; i++)
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{
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this.arrayData[i] = Math.floor(1 + Math.random()*MAX_DATA_VALUE);
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this.cmd("SetText", this. arrayRects[i], this.arrayData[i]);
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}
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for (i = 0; i < COUNTER_ARRAY_SIZE; i++)
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{
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this.cmd("SetText", this. counterRects[i], "");
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}
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this.animationManager.StartNewAnimation(this. commands);
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this.animationManager.skipForward();
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this.animationManager.clearHistory();
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}
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// We want to (mostly) ignore resets, since we are disallowing undoing
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CountingSort.prototype.reset = function()
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{
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this.commands = new Array();
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}
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CountingSort.prototype.resetCallback = function(event)
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{
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this.randomizeArray();
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}
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CountingSort.prototype.disableUI = function(event)
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{
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this.resetButton.disabled = true;
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this.countingsSortButton.disabled = true;
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}
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CountingSort.prototype.enableUI = function(event)
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{
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this.resetButton.disabled = false;
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this.countingsSortButton.disabled = false;
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}
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var currentAlg;
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function init()
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{
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var animManag = initCanvas();
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currentAlg = new CountingSort(animManag, canvas.width, canvas.height);
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} |