I want to detect collision between two objects based on the image. I can use hittest for this, but I want the collision to be true when object A hits object B's image instead of object B's bounding box.

Example: Say I have an arch. If object A goes inside the arch (not touching it), it will register as a hit, although I never acutally touched the image. How can I say that the hit is true only when object A touches the image?
Thanks to all of you who answered so far. I'll have to try these when I get home tonight. Thanks! Still looking for answers though.

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You need a method to get the pixel contents. There is a value for transparent pixels. You need to put logic in to compare the individual pixels, and flag if theres a collision between 2 non-transparent pixels. This is the only way. I'm sorry I do not have the actual function definitions available, but any good reference on flash graphics libraries should do the trick.

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Quick note without testing....

Can you just do a hitTest with the image and what u want.

for example object A and object B are on the root timeline- ur image is inside object B. make ur image be inside a movie clip which in turn is inside object B. then do a hit test with onjectB.image instead of just object B. Hope that makes sense.

heres some dirty code for ya:

box_mc.onPress = function() {
startDrag(this);
};
this.onEnterFrame = function() {
if (box_mc.hitTest(circle_mc.circle2_mc)) {
trace("you hit the circle");
}
};

there are 2 objects on the stage. box_mc and circle_mc, then circle2_mc (which is inside circle2_mc- where ur image would be.)

send em a note if u have questions and please forgive any yahoo formatting to the code.

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visit www.actionscript.org tutorials section and search for hit test keyword Enjoy!

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