This function is A Star. The demo is for oblique angle by 45 degrees.

AStar
.....\.actionScriptProperties
.....\.project
.....\.settings
.....\.........\org.eclipse.core.resources.prefs
.....\bin-debug
.....\.........\AStar1-app.xml
.....\.........\AStar1.swf
.....\src
.....\...\AStar1-app.xml
.....\...\AStar1.as
.....\...\Node.as
.....\...\Utils.as

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