I have been working on a simplistic RTS, but I have been having trouble with Box Selection. (Drag to select multiple units.) I wrote this code:

Code:

---

if (mouse_left == on) && (mouse_moving) 
		{
			boxX=mouse_pos.x;
			boxY=mouse_pos.y;
			mouse_map = Mouse_Box;
			
			while(mouse_left == on)
			{
				draw_line(vector(BoxX, BoxY, 0), NULL, 90);    
				draw_line(vector(BoxX, mouse_pos.Y, 0), vector(140,131,131), 90);   
				draw_line(vector(mouse_pos.x, mouse_pos.y, 0), vector(140,131,131), 90);   
				draw_line(vector(mouse_pos.x, BoxY, 0), vector(140,131,131), 90);   
				draw_line(vector(BoxX, BoxY, 0), vector(140,131,131), 90);
				wait(1);
			}
				}

---

It works fine, and the box looks good, but I don't know how to select the units inside of it. Does anyone know how to do this? (I thought about using C_scan, or creating a block to go collide with my units, but really i'm stumped...)

Use vec_to_screen to get a units XY screen coordinates..then check these XY if they are within the drag box boundaries

Thanks, but I still went wrong somewhere. It thinks my unit is always outside of the "view" parameter. (I call it like this:
Code:

---

temp=me; 
if (vec_to_screen(temp,camera) == 1)
{
    //An annoyingly large # of "if" statements
}
else
{
    beep();
}

---

)
So what does that mean? Is there soem other view I should use? or is there some obscure camera var not mentioned in my manual???

Thanks for the help...