Whether the touch point is in the button rectangle

Source: Internet
Author: User

Assume that the touch variable is T.

①T-> getlocation()Obtain the global GL coordinates of the touch.

② Convert the coordinates to the local coordinates of the button:Button>Converttonodespace(Globalp );// Ignore the registration point because when the get button is held, it is used as the origin from the lower left corner of the button

③ Obtain the rectangle of the button:RectR =Button-> Getboundingbox();

④R. Origin= Vec2: Zero;// Convert to (0, 0) Because globalp uses the lower-left corner of the button as the origin, so the button rectangle must also use the lower-left corner as the origin.

⑤ Determine if it containsR. containspoint(Globalp)

OK, success

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