HTML and CSS Reference
In-Depth Information
Figure 8-9. The tiles sheet for the A* examples
Hereisthefullcodelistingfor
Example 8-13
.
Wewillbemodifyingthiscodeinthefollowing
sections to add to the size ofthe map and to demonstrate further A*functionality.This simple
example shows the basics of using the algorithm with our tile sheet and tile map and shows
how to display the results on the Canvas.
Example 8-13. A* Example 1
<!doctype html>
<html
<html lang=
"en"
>
<head>
<head>
<meta
<meta charset=
"UTF-8"
>
<title>
<title>
Chapter 8 Example 14: A* Example 1
</title>
</title>
<
script src
=
"modernizr.js"
><
/script>
<
script type
=
'text/javascript'
src
=
'graph.js'
><
/script>
<
script type
=
'text/javascript'
src
=
'astar.js'
><
/script>
<
script type
=
"text/javascript"
>
window
.
addEventListener
(
'load'
,
eventWindowLoaded
,
false
false
);
function
function
eventWindowLoaded
() {
canvasApp
();
}
function
function
canvasSupport
() {
return
return
Modernizr
.
canvas
;
}
function
function
canvasApp
(){
iif
(
!
canvasSupport
()) {
return
return
;
}
else
else
{
var
var
theCanvas
=
document
.
getElementById
(
'canvas'
);
var
var
context
=
theCanvas
.
getContext
(
'2d'
);
}
//set up tile map
var
var
mapRows
=
5
;
var
var
mapCols
=
5
;
var
var
tileMap
=
[
[
0
,
1
,
0
,
0
,
0
]
,[
0
,
1
,
0
,
0
,
0
]
