libGDX get pixel color from sprite or texture

问题

I was searching it on net but i wasn't able to find any solution. I have a sprite or a texture and when i touch it i want to get pixel color from touch coordinates.

so I have:

 if (Gdx.input.isTouched()) {
            Rectangle spriteBounds = sprite.getBoundingRectangle();
            if (sprite.contains(Gdx.input.getX(), Gdx.input.getY())) {
                //and here something like
                //Color color = sprite.getPixelColor(Gdx.input.getX(), Gdx.input.getY());
            }
        }

Is it possible? Thank you :)

回答1:

Something like the following might work, but is untested. You can get the color via the Pixmap of the sprite's Texture. You need to make sure that you are converting the input (screen) coordinates properly to the local coordinates of the texture.

if (Gdx.input.isTouched()) {
    Rectangle spriteBounds = sprite.getBoundingRectangle();
    if (spriteBounds.contains(Gdx.input.getX(), Gdx.input.getY())) {
        Texture texture = sprite.getTexture();

        int spriteLocalX = (int) (Gdx.input.getX() - sprite.getX());
        // we need to "invert" Y, because the screen coordinate origin is top-left
        int spriteLocalY = (int) ((Gdx.graphics.getHeight() - Gdx.input.getY()) - sprite.getY());

        int textureLocalX = sprite.getRegionX() + spriteLocalX;
        int textureLocalY = sprite.getRegionY() + spriteLocalY;

        if (!texture.getTextureData().isPrepared()) {
            texture.getTextureData().prepare();
        }
        Pixmap pixmap = texture.getTextureData().consumePixmap();
        return new Color(pixmap.getPixel(textureLocalX, textureLocalY));
    }
}

来源：https://stackoverflow.com/questions/28405361/libgdx-get-pixel-color-from-sprite-or-texture

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libgdx