ActionScript 3.0 :: Hittesting Irregular Shaped Objects?
Dec 16, 2010
What I'm trying to do is hittest two irregularly shaped objects using their alphas and not the bounding box.
The code below hittests two objects named target 1 & target 2. This is not my code, but mine looks exactly alike, except target 1 & target 2 are replaced with my MC's. the thing is, I keep getting an error.At every function line, like the "public static function complexHitTestObject I get an error that says: Expecting right paren before left-bracket. I don't know what this error is caused by, because I can't really see why Flash wants another right paren.
[Code]...
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Sep 8, 2009
I created a .PNG in Photoshop (see attachment) -- now when I make this into a movieclip the bounding box covers the entire area so the hittest activates as soon as my helicopter flies into the bounding box.I looked at adobe's "help" they recommended this code (by the way, I'm using Flash 8):
my_mc.hitTest(x, y, shapeFlag )
my_mc.hitTest(target)
The way I interpreted the code was like this:
onClipEvent(enterFrame){
heli.hitTest(248.1, -38, shapeFlag)
}
I read somewhere that you only use one of the two, and the shapeFlag one is the one to use.The above code I placed into the helicopter MC (named heli) - I set the x & y to where the PNG is.The PNG moves towards the helicopter, so I'm not sure if that makes a difference.I just want that if the helicopter runs into the ceiling or floor, the level resets.However my current actions activate as soon as it hits the bounding box.This is my code in the PNG:
onClipEvent(enterFrame){
this._x -= _root.levelSpeed;
}[code]....
I've tried a lot of things, and nothing seems to be working.
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Jan 30, 2012
I am looking for a way to get a similar effect as posted in the Adobe forums The current solution is very brute force using about 60 intermediate shapes gradually going from the outer shape towards the inner shape while slightly changing the color each time.
[Code]...
particular problem, I only wanted to have a shape fade into the color of the background so my solution was to draw the image slightly larger than usual and use Flash's blur filter to create the gradient effect. This is suitable only because my background image is a solid color so this won't work for everybody. This is also a very cpu intensive method but is faster than drawing 60 shapes.
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Feb 3, 2012
I have a series of dots on a world map that depending on certain criteria move from one country to another. At the moment they move to a random point around the country's (mc) centre, as calculated by addind half the width to the x or y coordinate etc. This pressents certain problems such as the centre of the US is actually outside the boundries of the countries borders because of Alaska. Other countries such as the UK have dots floating just off the coast. The dots also cluster coveringing each other up.
Is it posible to generate a random x and y coordinate that is inside the boundries of an irregular shaped mc such as a country. I know that Flash must have these values because of colision detection and mouse overs. I just don't know how you go about accessing them.
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Apr 13, 2009
I have modified the code from the Interactive Image Panning AS3 version (found here) and I have come to a standstill. If you look at my .fla (link) or the image (link) you can see its not a rectangle but has two of the top corners cut off. So it can't really be panned using the usual method because the corners need to be avoided.I have managed to trace 'white' or 'not white' when the areas i don't want panned are visible but I can't figure out how to get the scrolling to stop! My code is as follows:
Code:
import flash.display.*;
import flash.events.*;
[code].....
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Dec 6, 2002
I am making a thing where a bunch of square shaped movie clips will be placed on the desktop, and will be draggable. I was wondering if there was a way to get them to stick together... similar to the snap to objects tool. Like say I am dragging one and I want to make a large square out of the smaller squares. I want them to snap together...
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Aug 14, 2010
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Oct 9, 2009
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Code:
function doWedge(rad, angle, target) {
//angle to radians, then cut in half
[code].....
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Apr 1, 2010
I'm dabbling with 3D tweens but I've hit a snag. The tween works fine on it's own and also with a simple mask on it. My issue is when I add a second keyframe to the mask layer to create a different shaped mask. When it reaches that frame my 3d tween goes crazy and flies off.
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Nov 9, 2009
I have a question regarding hittest object in actionscript 3. When using events, you can check what the current target is by using e.target or e.currenttarget. I was wondering how this achievable by hittesting?since hittests are not a function.
I need to retrieve info about the hittested object.Here is an example to make it more clear:
ActionScript Code:
if(movieclip1.hitTestObject(movieclip2)){
textfield.text = "this is information selected by the hittest: " + channel[e.target.name].item;
}
I'm working on a project and using hittest to navigate. So it's pretty important haha.
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Nov 18, 2009
I have a movieclip named Map linked to a class named Map. Inside of the movieclip I have 3 instances of a movieClip hitbox. they are named block0, block1, block2. What I'm trying to do is add them to an array using a for loop. Then in my player class I use another for loop to hitTest against the array. What I'm getting tho is this error:
Code:
TypeError: Error #1034: Type Coercion failed: cannot convert []@2393159 to flash.display.DisplayObject.
at xxx::Player/loop()[Player.as:54] The code from Player.as that the error refers to is here:
[Code]...
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Aug 12, 2003
iv gotten hittest to work on me and my friends sites, but with olny one button for the MC to check for. Very simply, how do i get it to check for 2 or more?
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Sep 5, 2010
I've got a game where I need the enemys to hitTest with each other, I'm going to have copys of 3 types of enemys on the stage, instead of giving them all an instance name is it possible to hittest from the libary because I've given them instance names in the library of "enemya" "enemyb" "enemyc"
The code I have got didn't work which was -
Code:
onClipEvent(enterFrame){
if(this.hitTest(_root.enemyc)){
trace("true")
}
[Code].....
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Aug 2, 2010
I want to make a simple animation with some photos. But I'd like to create this in a circle shaped workspace (stage), so when I export the movie as a .swf it will be shown as a round document, instead of the basic rectangle.
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Apr 22, 2009
What is the most efficient way to text for a collision between an elliptical object, and an irregularly shaped object (closely related to a line) that rotates?
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Aug 23, 2009
I'm looking to run a trace that targets all TextFields on a mouse over, something like this:
PHP Code:
TextField.prototype.hitTest = MovieClip.prototype.hitTest;
onEnterFrame = function(){
[code].....
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Apr 23, 2006
are there any special rules regarding hittesting? im using this code here and its jus not working at all:
var speed:Number = 0;
var angle:Number = 0;
var angleFish:Number = 0;[code]....
im starting to get quite irritated
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Mar 8, 2011
Is there anyway to randomly place a MovieClip/Sprite on an irregularly shaped object?For a rectangle, it seems pretty straightforward (i.e. use Math.random with the range being the coordinates of an object)...but what if say, you would like to avoid placing objects in the center?
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Sep 30, 2009
I need some tips, algorithms, code samples, whatever relative to building random shaped close smooth curves, that have no intersections, not many "close to intersect" parts. Pretty much like on the image attached. If there are any algorithms for the same task but allowing intersections - would be great to know too.
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Nov 19, 2011
I have a tile-based platformer game under work, and I'm stuck on a problem with hitTesting:
//check all character collisions with levelHolder
for(var i:int = 0; i < levelHolder.numChildren; i++)
{
[Code].....
The problem here is that hitBlock only hitTests one block at a time, and when I test this: If you lean on a wall (press right arrow key) and go downwards you can go through the floor.
I need to make it so that I can test on multiple blocks at a time.
And I did try to replace hitBlock with levelHolder[i], but it gave an error saying:
ReferenceError: Error #1069: Property 0 not found on flash.display.Sprite and there is no default value. at Main/enterFrame()
I'm guessing that comes from the level array where 0 = blank block / empty space.
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Jan 6, 2011
At first I had all my sprites in an array and cycled through them to detect for collisions but now I am trying to put them in 1 big sprite and testing just that. I don't know if I am doing something wrong or this is to be expected but testing for 1 big sprite creates lag within the engine. Am I correct to assume that it's because I am constantly testing the pixels of the 1 sprite? When cycling through the sprites individually i never noticed this lag.
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Oct 29, 2011
I am trying to make a basic game, and have read all about bitmaps, but they have only confused me, so I am trying to succeed with a more flawed, but basic approach. I couldn't find any comprehensible tutorials on this, so I've tried it on my own, but it doesn't work.Basically I have my character in a movie clip connected to a class, and it is spawned when the movie starts, just like the "wall" class here. It populates the stage with a line of boxes, but my problem is that the hittesting only works on the first one.[code]
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Mar 19, 2008
I thought maybe I had to use localToGlobal, but they are on the same layer, so it can't be that. It works on the root frame, just not in the movieclip.
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May 5, 2009
I'm just learning so I'm sure I'm making many stupid errors. How do you hitTest 2 separate arrays of different lengths, all entries against one another . Code below for guidance.
Code:
package{
import flash.display.*;
import flash.events.*;
[Code]....
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May 11, 2010
I'm making a game where your character must touch rings (big ovals) that are moving up and down with a motion tween (with easing). I attach these movies and push them into an array. For the hittesting, nothing is accurate. Since a movieclip inside the ring movieclip is moving up and down, the boundary box is much bigger than it should be when hittesting. If I use the x/y method, it triggers the hittest when my character is in line with the reference point. It should trigger when the middle of the character hits around the middle of the ring.
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Feb 4, 2012
im having a really frustrating problem. I have 6 movieclips on the stage, all acting as 'map areas', these are named area1_mc, area2_mc and so on.. I then have a car which i drive around the screen, this instance name is car_mc ... All i want to do is do a HitTest to determine if the car is on one of the 6 areas.. i have the following
[Code]...
The reason it is not working i think is it is expecting the car to be on ALL map areas in order for it to be "on map". For example if the car is in the middle of area1_mc, i get three traces. On map (refferign to it being on area1_mc) then two traces of 'off map', because it obviously isnt on area2_mc or area3_mc.
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Jul 1, 2011
I'm trying to extend an isometric Flash game based on as3isolib. The game does only support diamond shaped grids but I have to implement the possibility to have rectangular shaped grids, too.
[Code]...
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May 4, 2006
i'we tried for years to duplicate multiple movie clip and then hittesting them all but i can't this is my last resort
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Oct 27, 2006
it's easy to test collision between two squares. how do I test the collision if they are rotated?
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Apr 25, 2008
I have 4 ball movie clips, a playhead and four target movieclips called mc_1-4, the array, (my_array), has 4 elements, which are each defined as having values of 0: I have a hitTest set up that will trace my_array to the output window each time it hits mc_1, to see what is happening. However the hitTest prints the array 3 times?
Am i right in thinking that this is because the hitTest is being triggered on entry of mc_1 in the center and upon exit?I need to make this hitTest be triggered once when the hitTest passes the center of mc_1. Secondly if any of the balls have been dragged and dropped on to mc_1 i want the array value with an index of 0, to change to 100 from 0 (not in terms of its index position because my array is only 4 elements long, in terms of its actual value) which i have tried to implement but i cannot configure the right code.
1. hit tests that only trigger once when they pass through the center of the object thus tracing one array.
2.use the balls 1-4 to make the array index 0, have a value of 100 if they are in contact with mc_1.
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