chrome/test/data/third_party/kraken/hosted/explanations/astar.html - Issue 11348021: Automate Kraken benchmark with Chrome Remote Control.

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Issue 11348021: Automate Kraken benchmark with Chrome Remote Control. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src

Patch Set: Created 8 years, 1 month ago

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1 <!DOCTYPE html>

2 <html>

3 <head>

4

5 <meta charset=utf8>

6

7 <!--

8 Copyright (C) 2007 Apple Inc. All rights reserved.

9 Copyright (C) 2010 Mozilla Foundation

10

11 Redistribution and use in source and binary forms, with or without

12 modification, are permitted provided that the following conditions

13 are met:

14 1. Redistributions of source code must retain the above copyright

15 notice, this list of conditions and the following disclaimer.

16 2. Redistributions in binary form must reproduce the above copyright

17 notice, this list of conditions and the following disclaimer in the

18 documentation and/or other materials provided with the distribution.

19

20 THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

21 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

22 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

23 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR

24 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

25 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

26 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

27 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

28 OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

29 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

30 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

31 -->

32

33 <title>Kraken JavaScript Benchmark: A* Search Algorithm</title>

34 <link rel="stylesheet" href="../kraken.css">

35 <script src="astar.js"></script>

36 <script>

37 function getCanvasContext() {

38 var canvas = document.getElementById('display');

39 if (canvas.getContext)

40 return canvas.getContext('2d');

41 }

42

43 function drawEndpoints(ctx, start, end) {

44 drawCanvasCell(ctx, start.x, start.y, "rgb(256,0,0)");

45 drawCanvasCell(ctx, end.x, end.y, "rgb(256,256,0)");

46 }

47

48 function drawSuccessfulPath(nodeList) {

49 var ctx = getCanvasContext();

50 for (var i=0; i < nodeList.length; i++) {

51 ctx.fillStyle = "rgb(256,0,0)";

52 ctx.fillRect((nodeList[i].x * 5) + 1, (nodeList[i].y * 5) + 1, 3, 3);

53 }

54 }

55

56 function drawCanvas(graphSet) {

57 var ctx = getCanvasContext();

58 for (var i = 0; i < graphSet.length; i++) {

59 for (var j = 0; j < graphSet.length; j++) {

60 var node = graphSet[i][j];

61 if (node.isWall()) {

62 drawCanvasCell(ctx, node.x, node.y, "rgb(0,0,0)");

63 } else {

64 drawCanvasCell(ctx, node.x, node.y, "rgb(50,50,50)");

65 }

66 }

67 }

68 drawEndpoints(ctx, start, end);

69 }

70

71 function drawCanvasCell(ctx, x, y, style) {

72 ctx.fillStyle = style;

73 ctx.fillRect(x * 5, y * 5, 5, 5);

74 }

75

76 function doIt() {

77 var div = document.getElementById("console");

78 div.innerHTML += go();

79 div.innerHTML += "<br>";

80 drawSuccessfulPath(path);

81 }

82 </script>

83 <style> #display { border: 5px solid rgb(0,0,50);}</style>

84 </head>

85

86 <body onload="drawCanvas(g1);">

87 <div id="content">

88 <h2>Kraken JavaScript Benchmark: A* Search Algorithm</h2>

89 <div id="results">

90 <p>This benchmark uses the <a href="http://en.wikipedia.org/wiki/A_search_a lgorithm">A search algorithm</a> is used to automatically plot an efficient pat h between two points,<br> in the presence of obstacles. Adapted from code by <a href="http://www.briangrinstead.com/blog/astar-search-algorithm-in-javascript">B rian Gringstead</a>.</p>

91 <p>Below, you can watch the algorithm plot a path through the maze.</p>

92 <canvas id="display" width=500 height=500></canvas>

93 <p><input onclick="drawCanvas(g1); setTimeout(doIt, 10);" type="button" valu e="Try It!"></p>

94 <div id="console"></div>

95 </div>

96 </div>

97 </body>

98 </html>

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