A floppybird game challenge

[Ginsengelf]

Hi, in screen coordinates you have zero at the top of your screen, and the max value at the bottom.

Ginsengelf

[nehakakar]

Hey hi, you need to invert the y coordinate value so that higher values correspond to higher height. You can achieve this by subtracting the y coordinate from the maximum height value.

[helendam]

In Qt's QGraphicsScene, the coordinate system has the origin at the top-left corner, with the Y-axis increasing downwards.
MAYAPOSCH
This means that as your Flappy Bird character moves upward, its Y-coordinate decreases. Consequently, when you display the Y-coordinate as the height, it appears to decrease as the bird ascends, which is the opposite of the expected behavior.

[helendam]

In Qt's QGraphicsScene, the coordinate system has the origin at the top-left corner, with the Y-axis increasing downwards.
This means that as your Flappy Bird character moves upward, its Y-coordinate decreases. Consequently, when you display the Y-coordinate as the height, it appears to decrease as the bird ascends, which is the opposite of the expected behavior.

[Lindern]

oh. thank you for this answer