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tbird

Getting the pixel data of a sprite after scale, filter etc

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I know how to get the raw pixel data of the original texture of an image sprite, but is there a way to get the pixel data of the sprite just before it is composited with all of the other elements, but after it has been altered by scaling, filters, etc?

renderer.extract.pixels(mysprite) seems to just return the original texture no matter what transformations have been performed on the sprite.

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I'm writing this as a favor for a public school teacher.

I have an image of a geographical map with a bunch of "hot" areas that I want to be able to individually detect clicks on.

My plan is to use different bitmap masks to represent each different area so they can scale to fit the browser window bounds along with the image. Then I was going to use pixels() to detect the alpha values of the mask pixel the mouse cursor is over.

Is there a smarter way to do arbitrary click-area detection that doesn't use pixels()?

Thank you for your help! 

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yes, i should, all resizes are handled with coordinates transformation (toLocal/toGlobal stuff)

in case something fails, check if interactionManager actually has correct coords of mouse, "renderer.plugins.interaction.somethingsomething" , you can override positioning function if you need : https://github.com/pixijs/pixi.js/wiki/v4-Gotchas#css-transforms-on-canvas

Edited by ivan.popelyshev

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