so I have a problem with tiled map, My map has gaps/texture bleeding, I read other questions with this problem but I could not get the one which works.
I'm using already made sprite sheet which includes all of tiles, so does enyone know the solution for it ? that I could make and I wont need to cut like 60 tiles from sprite sheet ?
use texture filter Nearest not Linear since Linear user 4 surrounding texels to calculate actual color so when it is on the border of tile it will generate the gap. You can read about TextureFilter here:
http://www.badlogicgames.com/wordpress/?p=1403
and you set it just like:
Sprite sprite;
//now you are initializing the sprite...
sprite.getTexture().setFilter(TextureFilter.Nearest, TextureFilter.Nearest);
of course you can call setFilter() direct on texture if you have an access to it. If you don't because you create tiledMap from file you can try to iterate over tiles and set proper filter for every tile texture:
Iterator<TiledMapTileSet> iter = tiledMap.getTileSets().iterator();
while(iter.hasNext())
{
Iterator<TiledMapTile> iterTile = iter.next().iterator();
while(iterTile.hasNext())
{
iterTile.next().getTextureRegion().getTexture().setFilter(...);
}
}
You can also just extrude your atlas in TexturePacker - it will double every pixel on the border so color blending wouldn't affect it
Related
I am working on a flash sound mixer application with multiple sound channels, and I am having trouble with the lights beside the volume knob.
Is there a way to hide just a part of an image?
On the image below, image-2 is on top of image-1 to create some kind of volume level indicator effect, and how much of image-2 is shown depends on the value of the volume.
image-url: http://s30.postimg.org/r3ow1g5bl/volume_lights_level.png
I've tried by just reducing the height of image-2, but it looks awful and distorted.
Is there something in flash that works closely the same as CSS's behavior.
example: I'll just make image-2 a background of a shape, and when I reduce the shape's height, the image-background does not get distorted or changes it's height as well.
By searching for solutions, I have come across the mask property, but I don't quite understand how it works, and most of the examples shown are images placed inside circles.
Is the mask property applicable in this situation?
I'm quite new to flash so I don't know a lot of things yet.
You can indeed use a mask.
How to programmatically create your mask
Put an occurrence of your image named myImage on the stage, and put over this occurrence a mask named myMask with the same dimensions. You can apply myMask mask to myImage using it's mask property like below:
Main Timeline
myImage.mask = myMask;
function mouseMoveHandler(e:MouseEvent):void {
myMask.height = myImage.y - e.stageY;
}
stage.addEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler);
You have just to adapt this code to your animation, in the function where you click your button.
I got it working now, many THANKS #VC.One. heres how I did it.
Imported img-2 to stage, converted it into symbol(type:Movie Clip), assigned instance name: img2_mc.
I created a new layer for the mask, drawn a rectangle using rectangle tool, converted it also to symbol(type:Movie Clip), assigned instance name: mask_mc.
Then applied the mask to img2_mc.
/* the code */
img2_mc.mask = mask_mc;
function onEnterFrame(event:Event):void{
var volumeKnob_y = volSliderKnobOn.y + 12; // adjust it to the center of the knob
mask_mc.height = volumeKnob_y;
}
I'm hoping to create about 50-80 'balls' on the screen and each ball is an object of a class extending CCNode. Each ball will be about 20 x 20px.
Would it be more efficient to
override void draw() and use ccDrawCircle()
or make a picture and make a CCSprite with it (it'll needed be added to the node)?
Most effective way to draw multiple nodes, that use single material (texture) is CCSpriteBatchNode.
// we create base bach node with texture
CCSpriteBatchNode *batch = CCSpriteBatchNode::create(textureFile, 50 /* initial capacity of node */);
// then we create our sprites with the same texture
CCSprite::sprite = CCSprite::create(textureFile);
batch->addChild(sprite);
CCSpriteBatchNode can contain only CCSprites with the same texture, that used for batch node, but all sprites are drawed in single function call (batch drawing).
Color and opacity of every sprite can be changed. To colorize sprites you can create white-colored texture of ball. When you use setColor method, white color will be transformed to color, that specified in setColor
Ok so im trying to load a bitmap image as a background using this:
screenBitmapData.copyPixels(tilesBitmapData,new Rectangle(sourceX,sourceY,tileSize,tileSize),new Point(destX,destY));
screenBitmap = new Bitmap(screenBitmapData);
addChild(screenBitmap);
This load my tiled map correctly and display it on the screen.
Now i want to add another image which will be used as my character and the frame displaying it contain my character movement and then display the image as follow:
screenBitmapData.copyPixels(playerSheetBitmapData, new Rectangle(currentSpriteColumn * CHAR_SPRITE_WIDTH, currentSpriteRow * CHAR_SPRITE_HEIGHT, CHAR_SPRITE_WIDTH, CHAR_SPRITE_HEIGHT), new Point(xPos, yPos), null, null,true);
I setted the alpha channel on my character image and this is the result when im moving around my map with it:
http://snag.gy/L2uuR.jpg
As you can see, the background image doesnt refresh. And i simply dont know how to do this. Im pretty new with flash and as3 and ive been trying for days to make it work. I know it have something to do with the copypixel or redrawing the background before i draw the sprite again... Any ideas?
You need to redraw the entire scene. All you're doing at the moment is drawing the player ontop of the result of your previous draw.
All you need to do in your case is draw the entire background each frame before you draw the character. It could look like this:
function renderScene():void
{
// Draw the background, which will replace all the current graphics
// on the Bitmap.
screenBitmapData.copyPixels(tilesBitmapData,new Rectangle(sourceX,sourceY,tileSize,tileSize),new Point(destX,destY));
// Then draw the player.
screenBitmapData.copyPixels(playerSheetBitmapData, new Rectangle(currentSpriteColumn * CHAR_SPRITE_WIDTH, currentSpriteRow * CHAR_SPRITE_HEIGHT, CHAR_SPRITE_WIDTH, CHAR_SPRITE_HEIGHT), new Point(xPos, yPos), null, null,true);
}
To actually clear the Bitmap though, you can just use fillRect() to fill it with a color (e.g. black):
// Fill the Bitmap with black.
screenBitmapData.fillRect( screenBitmapData.rect, 0x000000 );
I'm working on a simple image crop where the user draws a line with the mouse around an area that they want to keep. When they confirm, the rest of the image will be cropped out. Here's how I'm currently handling said cropping:
var data = c.getImageData(0,0,canvas.width,canvas.height);
for (var x = 0; x < data.width; x++) {
for (var y = 0; y < data.height; y++) {
if (!c.isPointInPath(x,y)) {
var n = x + (data.width * y);
var index = n*4;
data.data[index+3] = 0;
}
}
}
However, this can bog down really quickly. The less of the image you try to retain, the faster it goes, but even saving 30% of the image (canvas is 800x800) causes it to hang for several seconds. Is there a faster way to go about this?
I don't really understand why you are diving into pixel details to manipulate your cropping image functionality. It's understandable as bigger the image is get as more time is needed for cropping out the rest of the image, because practically with iterating over a two dimensional array of pixels the processing time needed for the operation is exponentially increasing with the increasing in size of the pixels map.
So my suggestion would be to try to remake the function without to even touch the getImageData and putImageData function. It's useless. I would make in the following way:
Obtain the pixel coordinates at the mouse down.
Create an event listener for the mouse move.
Create a semi-transparent image over the original image and use the fillRect function to draw into the created canvas.
Create an event listener for mouse up.
Obtain the pixel coordinates at the mouse up.
Calculate the coordinates of the resulting square.
Draw the resulting image into the canvas using as parameters the square coordinates.
As a final step draw the content of the canvas to an image.
This way you will save a lot of overhead on image cropping processing.
Here is a script for your reference: https://github.com/codepo8/canvascropper/blob/master/canvascrop.js
There is no real way to speed it up when you have to use a user defined shape, but the bogging down can be handled with a worker.
Some ideas:
Restrict getImageData to the bounding box of the polygon the user draws.
Put data.height, data.width etc. used inside the loop in a variable.
Maybe you can split up inside/outside tests and setting the imagedata alpha value.
Maybe even draw the polygon to a black and white imagedata object, then get the difference between the two?
Can you share the isPointInPath(x,y) function?
I have background image and smaller image. I copy the smaller image into the bigger image using copypixels like this:
destBitMap.copyPixels(img, new Rectangle(0, 0, img.width, img.height),
location);
Now I want to rotate the image before copying it. Whats the best way to do it?
I tried using Matrix and bitmapData.draw() but its unacceptable. it has pixelated edges.
I found this pixelbender filter : http://life.neophi.com/danielr/2009/07/image_rotation_with_pixel_bend.html
for rotating images. on the plus side, it is really fast. I never used pixelbender so Im curious if its possible to take that filter, apply it to bitmapimage and copy the rotated image into the background image.
This is what Ive tried (which doesnt work):
shader = new Shader(new RotateFilter() as ByteArray);
shader.data.origin.value = [resizedImage.width / 2, resizedImage.width / 2];
shader.data.rotation.value = [rotation];
filter = new ShaderFilter(shader);
var bm:BitmapImage = new BitmapImage();
bm.source = resizedImage;
bm.filters = [filter];
Whats next? Is this possible at all?
If you want to apply a single filter to a bitmap, use BitmapData.applyFilter() method. Obviously, you can do anything with the resultant bitmap. But, you have to apply all this on a lower level than UIComponent allows. If your resizedImage is type Bitmap, you do this:
resizedImage.bitmapData.applyFilter(resizedImage.bitmapData,resizedImage.bitmapData.rect,new Point(),filter);
After this, your resizedImage.bitmapData will contain a rotated bitmap.