ActionScript 2.0 :: How Does Bitmapdata Hittest Work
Sep 23, 2009
import flash.display.BitmapData;
import flash.geom.Point;
//
var BitmapA:BitmapData = new BitmapData(550, 400, true, 0x00);
[code]....
This is using the bitmapdata.hittest way to check whether the one bitmap is overlapping the other. Throug pixel-to-pixel detection.But I'm having trouble understanding this line:
Code:
if (BitmapA.hitTest(destPoint, 255, BitmapB, currPoint, 255))
I know that destPoint is the topleft point from which it is determining all opaque pixels. No value is given to destPoint so basically it is checking from 0,0. Having determined all opaque pixels from that bitmap it should compare them with the opaque pixels of the other bitmap. But why does currPoint use the topleft coordinate of its movieclip? Couldn't it just as well use 0,0 too? I mean when determining the opaque pixels of bitmap two it might as well start checking for those from 0,0 as the topleft position as well?
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Sep 1, 2011
how to use the bitmapData collision method. Now I'm trying to figure out if there is a way to see at what angle or coordinate of the bitmapData the collision happens? I need it in order to figure the accurate bounce angle after the collision occurs.
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Jul 11, 2009
Im making a simple game with destructable terrain. Therefore i use a bitmap for the ground and a movieClip for the player. When the ground is a bitmap i cant use regular hitTestPoint because of the bitmaps transparent pixels. So i looking i the livedocs for the bitmapData.hitTest but i rly dont understand all the parameters.So my question is. How can i reproduce this with bitmapData.hitTest?
ActionScript Code:
if(ground.hitTestPoint(player.x, player.y, true)) {
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[code]....
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Aug 23, 2011
I have converted a PNG into a bitmap, then converted that into bitmapData.
I have a object called _player, and I wish to add collision detection, however I can seem to get it to work.
my code is:
if(bmd1.hitTest(new Point(_player.x, _player.y))){
trace("hit");
}
bmd1 is my bitmapData,_player is the object is wish to test against.
I am getting the following error:
1136: Incorrect number of arguments, Expected 3
I have looked around but cannott find what argument I am missing
I have tried
if(bmd1.hitTest(new Point(_player.x, _player.y), 50, _player)){
trace("hit");
}
I should mention that the reason for me taking this approach is that I have a PNG, with transparent areas, I need to test for collisions in the non-transparent areas, which is why I was using this approach
I have a PNG, i import that and convert to bitmap, then convert to bitmapData
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Jul 31, 2011
Having used copyPixels to display an image, I'm trying to copy another in it's place when the mouse is hovering.The only way I can copy the new image over the old is by setting the If statement to == false. I know there's something wrong with testing the bitmapData of the loaded .png because the hitTest would apply to anything copied from that tile sheet... but how to designate just the copied area?
ActionScript Code:
package
{
[code]......
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Oct 11, 2010
sometimes I get this extremely nasty bug:
Code:
ArgumentError: Error #2005: Parameter 0 is of the incorrect type. Should be type BitmapData.
[code]....
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Feb 22, 2012
sometimes I get this extremely nasty bug:
Code:
ArgumentError: Error #2005: Parameter 0 is of the incorrect type. Should be type BitmapData.
at flash.display::BitmapData/hitTest()
This is the line where I get this error:
Code: if (player.bitmapData.hitTest(player.point, 255, tempUpgrade.bitmapData, tempUpgrade.point, 255))
I have absolutely no idea what went wrong. My object (tempUpgrade) is generated inside of a manager-class. There I can define the look of it and it gets cached. The image I use is a spritesheet (png) that's embed inside of my library-class. The spritesheet is splitted into appropriate pics via a CacheTileSheet-class.After that process they get thrown inside of an array because I need the bitmapData for pixel-perfect collision detection. Of course this is not the complete code so if someone needs more please let me know.
[Code]...
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Aug 27, 2010
I have two png files. I import them using loaders. The images in the png files each have opaque (solid) and transparent parts. I want to use the bitmapdata.hittest method to detect when their opaque parts have collided.
[Code]...
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Feb 3, 2009
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[Code]....
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Mar 17, 2011
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Actionscript Code:
hero_mc.addEventListener(Event.ENTER_FRAME, enter_frame); function enter_frame(event:Event):void{if (hero_mc.hitTestObject(block_mc)) { trace("hero _mc is next to block_mc") } else { hero_mc.y += 10 hero_mc.x += 10 } }
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Code:
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[Code]....
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Code:
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[Code].....
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Sep 22, 2009
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onClipEvent (enterFrame) {
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player.addEventListener(Event.ENTER_FRAME, blockTest);
function blockTest(evt:Event):void {
[Code].....
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Nov 30, 2009
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I have this code so that when a spaceship goes through a blackhole it plays the spaceships moveiclip. This works fine on the first part of the code when the user just clicks the start button.However, i have put in a difficulty setting and when you change the difficulty setting the hittest doesn't work anymoreand there are no error messages. I have tried putting the blackHoles array in the difficulty function but nothing changes and i didn't really think this would make a difference as the easy function is already using the blackHoles array outside the difficulty function.
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So I'm doing this project for school and all, and I'm trying to do a htitest on an object. For some reason, it doesn't work. So I tried writing out my own method... Which halff worked, but wasn't as exact as it should've been.
Heres my code (Though I'm pretty sure somethings wrong with my MC, so i'll upload the main .fla file)
Code:
right = true;
left = false;
itemX;
itemY;
[Code].....
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Sep 6, 2011
Lets say that I got movieclips A,B,C,D in my scene and E,F which only come into scene when A hitTest B and C hitTest D.I was able to make the A+B and C+D hitTest functioning properly. But when E,F came into the scene, I tried to make E to hitTest F to get something else function but they won't work.# note that there is some short animation before E & F come into scene.I am pretty sure all the instance names are named properly.
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I have two pieces of code, that won't work together.First: this makes a hitTest on an mc to make it run on rollover:
Code:
onClipEvent (enterFrame) {
if (this.hitTest(_root._xmouse, _root._ymouse, true)) {
if (this._currentframe<this._totalframes) {
nextFrame();
[Code]...
Each work seperately, but they won't together. How do I get around this?
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Mar 19, 2009
I've been trying to write a hittest that will work for rounded walls on my RPG. But I've been epic phailing.
Heres my code:
onClipEvent(load){speed=10;
}onClipEvent(enterFrame){if(Key.isDown(Key.UP)){this._y-=speed;this.gotoAndStop(5);
}if(Key.isDown(Key.DOWN)){this._y+=speed;
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Mar 30, 2012
import flash.display.BitmapData;
import flash.display.Bitmap;
import flash.geom.Rectangle;
[code].....
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Mar 19, 2010
I'm trying to resize each image without success. After pulling my hair a few time, I can't figure out to make the smoothing works on Stage. Basically I want to be able to resize any pics: 600x900 -> 400x600
Code: Select all // Call LoadBitmap class, bitmapWidth & bitmapHeight are the desired 400x600
loadBitmap = new LoadBitmap(bitmapWidth, bitmapHeight);
loadBitmap.loadBitmapData(theImage);
[code]....
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Nov 10, 2003
for some reason the hitTest I have setup in the attached file seems to work in relation with the blue box's that surround objects and not with the actually objects. Anyways I'm pretty sure that it has to do with the border.
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Jul 3, 2007
For some of the menus and stuff, I have it grayscale the screen with BitmapData.draw and ColorTransform. It works perfectly when played through Flash and Flash Player, and even when played locally through a browser.
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As it only doesn't work when on a server, you'd think it was some form of security violation. But I cannot think of anything that would cause this to breach Flash's security. I'm only drawing the _root of the movie clip, nothing located on another domain.
Even weirder, the exact same code worked a while ago when uploaded. It only stopped working a short time ago after I was adding some menus and such - and as much as I've been trying to pinpoint it to an exact moment in time when it stopped working, I can't.
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Feb 2, 2012
I am trying to save an image from flash, just load a image into flash place some decorative clip art and then save the image to the disk. I was able to do this via BitmapData + PNGEncoder + FileReference.
Now as an experiment I have introduced new clip sprites for decoration, where in each of these have multiple sprite children with different blend modes say "ERASE", "OVERLAY", etc. As far as the flash runtime is considered I am getting the expected effect for blend modes.
But as soon as I try to save the image, the output is weird, it doesn't resembels what I see in the flash player. I also tried to print the page as pdf using PrintJob class, but the pdf would not show the filter effects or the blend modes ones.
As far as I am using the plain clip arts with no effects, no blur, no blend modes the image is generated. But when i try to use the BitmapData.draw() method with the image that has clip arts with blend mode or blur it fails.
BitmapData.draw() with blend modes, as I feel if the we could possibly see the blending effects in the player then we could possibly print it as well.
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Jan 31, 2007
I'm using Flash 8, with this code in the first frame:
import flash.display.BitmapData;
rissa._x=Stage.width/2;
rissa._y=Stage.height/2;[code].....
When I publish the file, I'm getting the following error message in the Output panel:
**Error** Scene=Scene 1, layer=Layer 2, frame=1:Line 7: The class or interface 'BitmapData.loadBitmap' could not be loaded.
var plaid:BitmapData.loadBitmap("plaid");
Total ActionScript Errors: 1 Reported Errors: 1
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Oct 14, 2009
I am trying to use the reflect class from "http://pixelfumes.blogspot.com/2007/03/reflection-class-v3-with-source .html" but I keep getting this error:
ArgumentError: Error #2015: Invalid BitmapData.
at flash.display::BitmapData()
at Reflect()
at Site_fla::GalleryPage_29/loadThumbs()
at Site_fla::GalleryPage_29/sortXML()
[Code]...
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