I wonder if there is a formula that i can calculate the rotationX and rotationY value out of a sprite display object.
For example the sprite below. If a user set up all the points and draw out this shape. Is there a way i can find out rotationX and rotationY which can archive the same result?
I would like user to defined the container and whatever sprite drag into this container get auto rotationX and rotationY so the perspective stay the same.
I have found the solution by reading through the following link:
http://zehfernando.com/2010/the-best-drawplane-distortimage-method-ever/
Related
I am a newbie to AS3. I have a movie clip.I want to know if there is a drawing/graphic drawn over movie clip at all?
Simple, check the width and height of the MovieClip. Assuming you mean the MovieClip itself contains the drawing/graphic.
After seeing Fygo's comment
I did some testing and found out that the scale properties of the MovieClip will change depending on whether or not it has any graphics.
Meaning if you set the width and height to zero, the corresponding scaleX and scaleY will also be set to zero. So what you can do is check the scale AND the dimensions of the MovieClip. If both scales are 1:1 and both dimensions are 0:0, that means you didn't mess with the dimensions and it truly is graphic-less.
trace (awd.scaleX, awd.scaleY, awd.width, awd.height);
//If you get 1 1 0 0 as the output, the MovieClip is empty
Use readGraphicsData(). I assume that if it's empty it means there is nothing drawn there :)
It's not perfect though, read the reference
Maybe you just mean collision detection? To detect if two movieClips are touching...?
For that you need either:
HitTestObject - (checks if two objects touching by their box boundaries) - Link:
or HitTestPoint - (read description carefully) - Link:
A good tutorial explaining both methods is here: - Link:
example code:
if ( MC_one.hitTestObject(MC_two) )
{
trace("MovieClip One is touching/over MovieClip Two");
//add code needed to happen when touching/over. example below
//MC_two.gotoAndStop(2); //example tells touched MC_two to change frame to 2
}
I'm brand new to AS3, trying to take a bitmap from the library and display it in the timeline with actionscript. Here's the code I'm using so far as per Adobe's site:
addChild(new Bitmap(new myBitmap(100, 100)));
and this works, but changing the dimensions in those brackets doesn't. How can I change the dimensions?
Also, how can I change the position of the bitmap? Right now it's at 0,0.
You first get a handler of that bitmap:
var theBitmap:Bitmap=new myBitmap();
Then, you can change its coordinates:
theBitmap.x=100;
theBitmap.y=100;
addChild(theBitmap);
In order to do scaling, you can also alter its scaleX and scaleY properties as with any other displayed object. In order to make a Bitmap object to be of certain size on screen, you have to scale it so that scaling parameter equals (new dimensions)/(old dimensions). But, if you want something else, you have to explain it further.
I have a bit problem with rotationX and rotationY.
It's cool if i just do a roationX and rotaionY below
_eventParent.rotationY =_differentX;
_eventParent.rotationX =_differentY;
However once i have assign a mouse move to the _eventParent. The roationX and roationY change perspectively while the mouse is moving. so instead the item remain the same size. it increase and decrease size prospectively. any idea why is it doing this? is there a possibility to stop this behavior?
Thanks
Please find the image below.
Perspective allows part of your shape to look closer to you than other parts. The problem is that perspective has a center, or "vanishing point" and by default, it is fixed. As you move your shape farther away from the vanishing point, the perspective changes, causing your shape to widen or narrow.
You can fix this by updating the vanishing point so that it is always at the same coordinates as your shape. Since the shape will always be at the vanishing point, the perspective shouldn't change.
To do this, create a perspectiveProjection for your shape:
_eventParent.transform.perspectiveProjection = new PerspectiveProjection();
PerspectiveProjection is located in the flash.geom package, so don't forget to import it.
Then whenever you update your shape's position, update it's vanishing point:
_eventParent.transform.perspectiveProjection.projectionCenter =
new Point(_eventParent.x, _eventParent.y);
You might need to offset the vanishing point by a set number of pixels to get the perspective looking the way you want it to.
Correct me if I misunderstood your question. Your question is that if you apply rotation to the movieClip object, then why does the size appear to be changing?
For simplification, Let's not apply rotation on both X and Y axis. Let's take a rectangular movie clip and onMouseMove we do ++myMovieClip.rotationX;
Now, this statement is going to apply rotation on the object about the X-axis and one would get a perspective of the movie clip flipping across X -axis and this flipping will show as change in size of the object.
The same applies to rotating across y-axis.
This should be fairly simple I'd think, I'm just not that familiar with actionscript haha.
I have a game where I have the background moving behind a character that stays in one position on screen. I'm relatively new to actionscript 3 but I'm wanting to have text boxes pop up whenever the player presses a key over certain objects passing in the background.
So, basically the background itself is a movie clip, and I have other graphics and movie clips within the background mc.
I was thinking of getting the player.x and y position and then "comparing" that position (>= and <=, etc.) with the graphic/movie clip in the background. But I just don't know how to obtain the x and y coordinate of the graphics/movie clips in the background mc.
You could try to target your movie clips in the background by getting their coordinates, then removing their parent's position (the background container).
Something like :
var finalXPosition:int = targetMovieClip.x - backgroundContainer.x;
var finalYPosition:int = targetMovieClip.y - backgroundContainer.y;
By substracting the target movieclip parent's position to its position, you gain the final position in the parent's scope coordinates.
It should work for you as soon as your character and your background container are situated at the same level of the display list.
Here is a quick diagram of what I try to explain (please forgive my inaptitude to draw nice and explicit drawings ^^)
Usually, when I stumble upon such a case, I try to make a quick and even dirty drawing, starting with what I want, then breaking down every useful data I have to achieve that result, you should keep that method in mind and try it the next time ! :-)
Basically i have x circles represented as MovieClips.
They are all assigned the same base color (for example red).
They should all have a brightness property ranging from 0 to 1 (0 would be completely white and 1 completely red).
I would like the following properties for representing these circles on stage:
When the circles dont overlap they are represented as stated above.
When the circles overlap the overlapping region should have the same base color as the original circles but the brightness of that area should be the sum of the brightnesses of all the circles that define the overlap.
The brightness saturates at 1. So the overlap of 2 circles with brightness 0.8 is 1 (the maximum value) instead of 1.6.
I am wondering if there is some kind of BitmapFilter i could use on the circles to achieve these properties? Or am I looking in the wrong place?
I am relatively new to Actionscript so any pointers are welcome!
Hi and welcome to SO and AS3!
I'll take each point separately:
1) Quite simple, you've probably already figured out that "addChild()" will add MovieClip objects to the Display List, meaning Flash will render them every frame.
2) The easiest way to do this is through "Blend Modes", which is Adobe's way of handling overlapping display objects.
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/display/DisplayObject.html#blendMode
Try setting the .blendMode property of each circle to BlendMode.ADD:
var circle:MovieClip = new MovieClip();
circle.blendMode = BlendMode.ADD;
3) If BlendMode.ADD doesn't give you the results you want, try creating a custom shader to do the job.
http://help.adobe.com/en_US/as3/dev/WSB19E965E-CCD2-4174-8077-8E5D0141A4A8.html
IMHO Blendmode is the easiest way of achieving the desired effect, and blendShader if you want precise customization. Please comment if you have further questions!
Some tutorials and examples:
http://www.learningactionscript3.com/2007/11/03/more-properties-blendmodes-filters/
http://active.tutsplus.com/tutorials/games/introducing-blend-modes-in-flash/
Cheers,
J