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image_hit(3)			 Arcan Lua API			  image_hit(3)

NAME
       image_hit  -  Test  if the visible region of a specific object covers a
       specific	point in screen	space.

SYNOPSIS
       true or false
       image_hit( vid, x, y )

DESCRIPTION
NOTES
       1      This function works by applying  the  active  transform  of  the
	      bounding	volume	and  then  projects using the currently	active
	      output projection	and finally performs a	point-in-polygon  test
	      for  the two triangles. This is performed	even for simpler cases
	      (e.g. non-hierarchical translations etc.).

EXAMPLE
       function	image_hit0()
	     a = fill_surface(32, 32, 0, 255, 0);
	     rotate_image(a, 45);
	     show_image(a);
	     if	(image_hit(a, 0, 0) == false and
		   image_hit(a,	16, 16)	== true) then
		   print("OK");
	     else
		   print("Fail");
	     end
       end

SEE ALSO:
       pick_items(3)

image				  April	2025			  image_hit(3)

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