How can I make model transit from one end of the screen to an other? Like on this picture:

I've asked for this before, but didn't get any good ideas... I don't want to create same model with same size and so on... I need one same model to move from one side of the screen to an other... There are allot of old games doing transits, but without copying models, panels etc. I think the same way can be created portals... You can see the same effect here, in game VVVVVV. Thank you.

you can try it with vec_for_screen / vec_to_screen
check, if the model is moving out at top, set the position to the bottom.
the same with left and right
i think you don't need two models because the player will expect the model at the other side an will not recognize that the model is switched in one frame.

But will model transit smoothly? For example, when only half of the model is out of the screen, then only half of it must appear on the other side, like on the picture made by me.

For that you NEED 2 models.

Damn! What you mean two models?! Old good snake game, do they use two snake models(or if snake goes few time between screens, how many models will I need then)?

you can try it with a shader, i believe there is some shader that clips meshes...
maybe that can be adjusted to your use.

I made an image to explain you an idea. (the ball in the left is the real)
(image in real size)
you need to make a function that when the ball is in the right the camera1 make invisible and the camera2 visible and vice versa.

when the ball is completely outside, change de pos of the ball to the other side and make invisible the view that is over the ball.

tell me if you understand me, I have the idea clear in my mind.

Use bmap_blit for that : http://www.conitec.net/beta/bmap_blit.htm
Blit the left portion of the bmap to the right edge of the panel and blit the rest portion to the left edge of the same panel.

bmap_blit don`t work with models

He gave 2D example game... Cant think of any more way to accomplish that without using copied model though...