Hi,
Im using mask to cut some part of image, on neko it’s working great. but on flash it’s like on this image:
this is my function that generate mask:
private function generate_mask():Sprite{
var mask:Sprite = new Sprite();
mask.graphics.clear();
mask.graphics.lineStyle(2, 0x000000, 0x000000, false);
mask.graphics.beginFill(0x000000, 1);
var p0:Point = this._hex.hex_corner(0);
var p1:Point ;
this.graphics.moveTo(p0.x, p0.y);
for(i in 1...6){
p1 = this._hex.hex_corner(i);
mask.graphics.lineTo(p1.x,p1.y);
}
mask.graphics.lineTo(p0.x, p0.y);
return mask;
}
and I use it like this:
var bmp_sprite = new Sprite();
bmp_sprite.addChild(this._bmp);
var mask_ = generate_mask();
bmp_sprite.mask = mask_;
addChild(bmp_sprite);
bmp_sprite.addChild(mask_);
this_bmp is Bitmap object passed to this class.
so - what is wrong? it’s great on neko but in flash its look just ugly
please help
p0 is this._hex.hex_corner(0); (note the index is 0)
p1 loops through the indexes 1…6
Thus he’s moving to 0 then drawing a line to index 1 (and I suppose lineTo also moves the pointer to the position he’s drawn the line to) and so on for index 2, 3, 4, 5 and 6.
I guess index 0 and 6 have the exact same position. Or at least they should
Here’s a sketch of what I mean (sorry for being so bad at sketching stuff)
there are no such thing as index 6 - as You suggested.
first part is correct, moveto 0.
than loop (lineto) move to 1,2,3,4,5 and that’s it!
than after loop I draw another line from 5 to 0
for(i in 1…6) mean 1,2,3,4,5 not 1,2,3,4,5,6 as You suggested.
Perhaps it might work differently if you start at a different point, or go counter-clockwise instead of clockwise? We don’t have any control over Flash Player, so it might be worth trying a couple alternative paths to draw
So you are sure your mask render as a black filled hexagone on flash? Strange because I use mask (with different shapes like stars, circles…) on flash target without issue. Your problem looks like more like a filling shape bug to me.
Anyway, you shoud probably add mask.graphics.endFill(); before returning your mask just to be sure flash do not take the first 3 points he found as first shape to fill… (But if you checked your mask sprite correctly display as a full black hexagone, this is not the issue)
Also, Did you try to have a png hexagonal mask as asset and to apply it to your bmp_sprite (rather than doing your mask on the fly). Just to be sure that the issue is with the masking function and not with the function generating the mask…?
Looks like a flash.bitmapdata.fill issue…
To circumvent the problem, If suggest you to use a png picture of a black hexagon as an asset and to scale, translate it if needed to create your mask rather than trying to create the shape on the fly…
Else, you could try to directly use a bitmapdata from a shape as a mask (this is the method I use when I want to create my own mask on the fly rather than having a png mask as embeded asset)
var data:BitmapData = new BitmapData(width, height, true, 0x0);
var hs:Shape = new Shape();
var g:Graphics = hs.graphics;
g.beginFill(0x000000);
var p0:Point = this._hex.hex_corner(0);
var p1:Point ;
g.moveTo(p0.x, p0.y);
for(i in 1...6){
p1 = this._hex.hex_corner(i);
g.lineTo(p1.x,p1.y);
}
g.lineTo(p0.x, p0.y);
g.endFill();
data.draw(hs);
So you tested this function with a non transparent bgcolor (not 0x00… or 0) and it works?
If yes, why not just reuse this fucntion for your mask whith a black color and bgcolor ?
Well I don’t really know. Use this function with a black background color just to be sure it works as expected (because in the picture you pasted, you use a texture as background of you map hexagones so we can’t see the background to check the filling is working as expected…)
i changed code before to:
mask.graphics.lineStyle(2, 0x000000, 0x000000, false);
mask.graphics.beginFill(0xff0000);
without texture, results are on images with red hexagons.
