I did mean a single straight line so it probably wouldn't have worked. Fear not as the code that Paul pointed me to works a treat.
Thanks for the super fast replies -----Original Message----- From: flashcoders-boun...@chattyfig.figleaf.com [mailto:flashcoders-boun...@chattyfig.figleaf.com] On Behalf Of Glen Pike Sent: 16 June 2011 15:26 To: Flash Coders List Subject: Re: [Flashcoders] Detecting if line crosses movie clip I am not sure - do you mean "single line" like a circle, or a single line as in straight one? My idea was to test if a circle was inside a rectangle, so not sure if would work with single lines... It might not work very well with anything but a rectangle either. On 16/06/2011 15:09, Paul Steven wrote: > Thanks Glen - this sounds like another good solution. I assume this would > work when the polygon is just a single line? > > -----Original Message----- > From: flashcoders-boun...@chattyfig.figleaf.com > [mailto:flashcoders-boun...@chattyfig.figleaf.com] On Behalf Of Glen Pike > Sent: 16 June 2011 14:48 > To: Flash Coders List > Subject: Re: [Flashcoders] Detecting if line crosses movie clip > > Hi, > > Can you measure the vector distance between the centre of the > polygon and the centre of the ball? If that is 0,0, and the diameter of > the circle is less than the smallest of width / height of the box, then > you are inside. > > Glen > > On 16/06/2011 13:58, Paul Steven wrote: >> Working on a game where the player must draw around some colored balls on >> screen by dragging the mouse to create the polygon that surrounds the >> objects. >> >> The polygon is created by drawing a series of lines every time the mouse >> moves. If one of these lines intersects one of the balls (movie clip) I > need >> to perform an action. >> >> So my question is how to detect when the line intersects a movie clip? >> >> The following is unsuitable as it treats the line as a rectangle e.g a >> vertical line will have a lot of hit area that I do not want to be hit > area >> if (ballMC.hitTestObject(lineMC)) { >> >> My other best suggestion is to use the 4 lines that make up the bounding > box >> of the ball movie clip and do a line intersection test for each line > against >> the line being drawn. This seems overly complex so before I try this I >> wanted to check there is not a simpler solution. >> >> Thanks in advance >> >> >> >> _______________________________________________ >> Flashcoders mailing list >> Flashcoders@chattyfig.figleaf.com >> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders >> >> > ca > _______________________________________________ > Flashcoders mailing list > Flashcoders@chattyfig.figleaf.com > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > > _______________________________________________ > Flashcoders mailing list > Flashcoders@chattyfig.figleaf.com > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > > _______________________________________________ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders _______________________________________________ Flashcoders mailing list Flashcoders@chattyfig.figleaf.com http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
