[Closed] Kind of 2D Bounding Box

Why not use the max-intern region rendering with “Auto Region Selected”?

Because there are more then one object in the scene and I need just the part of the render where the selected object is visible.

Yes, that´s exactly how it works.
Maybe i don´t fully understand what you try to achieve.
What would be different to “Auto Region Selected”?

Oh ok, I need to try it. I think I never tried this feature yet.

as an interesting exercise/puzzle

fn render_a_mesh obj =
(
	gw.setTransform(Matrix3 1)

-- compute viewport min and max bounding box
	
	scrn_pos = gw.wTransPoint (getvert obj 1);
	top = bottom = scrn_pos.y;
	left = right = scrn_pos.x;
	
	for v = 2 to obj.numverts do
	(
		scrn_pos = gw.wTransPoint (getvert obj v);
		if 	scrn_pos.x < left then left = scrn_pos.x;
		if 	scrn_pos.x > right then right = scrn_pos.x;	
		if 	scrn_pos.y < top then top = scrn_pos.y;
		if 	scrn_pos.y > bottom then bottom = scrn_pos.y; 	
	)
	
-- convert from viewport coords to render coords	
	
	vp_size = getViewSize();
	hscale = renderWidth/vp_size.x;
	vscale = renderHeight/vp_size.y;
	render_region = #(left * hscale,top * vscale,right * hscale,bottom * vscale);
	
-- render the region	
	
	render renderType:#region  region:render_region vbf:true
)

Thanks for the max script example.
It’s useful to know how this works.
I will try it out.

I tried the “auto region selected” with an animated camera and it doesn’t refresh the region.
So the region stays at the postion of the frist frame.

So I have to write my own script.

I will try Klunks’s script example…

this thread might help to http://forums.cgsociety.org/showthread.php?f=98&t=977505&highlight=TransPoint

Thanks for the hint, Denis!
I will have a look at it if I find some spare time.