Pixel perfect collision? about pixi-haxe

[MintPaw]

@ivanpopelyshev If you queried the pixels directly from the shader, but you could also look at the png file after transforming your point with the matrix from the texture, or cache the bitmap data, or any number of things. I guess I'll be writing that. :/

Most applications need some at least some alpha testing, even for just buttons, and almost all games require it. I'd say this hardly usable without it.

[ivanpopelyshev]

Oh, we didnt close this? OK, here's answer for v5: https://github.com/pixijs/pixi.js/wiki/v5-Hacks#pixel-perfect-interaction

[ivanpopelyshev]

WebGL + pixel perfect collision will be very slow thing. I dont think that any GL engine can support it.

[NicolasVereenoghe]

if I recall correctly, you can generate a bitmap array this way :

`var lModel : Container = "insert your display object reference"
var lCanvas : CanvasRenderer = new CanvasRenderer( lModel.width, lModel.height, { transparent: true});

lCanvas.render( lModel);

var lImageData : ImageData = lCanvas.context.getImageData( 0, 0, lModel.width, lModel.height);`

And so on, you can work on the ImageData instance. This worked for me at pixi 4.0.2, I hope it still works :) You may generate your bitmap datas before you use them, as I believe it's a bit expensive to generate them at the fly ...