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ironphoenix20
ironphoenix20 wrote ...

2017/5/6

Pixel Color Change

ironphoenix20 ironphoenix20

2017/5/6

#
Hi. Is there any way for me to get the RGB values of a pixel based on where a user clicks on the image? By the way, I am trying to get the RGB values of that pixel and then change all the pixels on that image that have the same RGB values to a different color? So the user can change one color to another on the image. Please provide code or any help would be useful. Thanks
danpost danpost

2017/5/6

#
If the image is the background of the world, then you can use the 'getColorAt' method on the background image with the x and y of the mouse click. If the image is set to an actor, then you need to use the location and size of the image of the actor along with the x and y of the mouse click.
ironphoenix20 ironphoenix20

2017/5/6

#
My image is an actor so how do I get the x and y of my mouseClick. Would that be the same as the x and y of the pixel?
danpost danpost

2017/5/6

#
ironphoenix20 wrote...
My image is an actor so how do I get the x and y of my mouseClick. Would that be the same as the x and y of the pixel?
That would certainly not be the same (unless the top-left corner of the image of the actor was at the top-left corner of the world window). The location of the actor, (x, y), would be the center point of its image. So (x-getImage().getWidth()/2, y-getImage().getHeight()/2) would be the world coorindate of the top-left corner of the actor's image. Subtracting that from the point the mouse was clicked at would produce the (x, y) of the image where the mouse was clicked.
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