Items can be dragged around tables.

code/_helpers/animations.dm

@@ -98,4 +98,23 @@
 	for(var/i in 2 to segments) //2 because 1 is covered above
 		animate(transform = matrices[i], time = speed)
 		//doesn't have an object argument because this is "Stacking" with the animate call above
-		//3 billion% intentional
+		//3 billion% intentional
+
+// This proc is used to move an atom to a target loc and then interpolite to give the illusion of sliding from start to end.
+/proc/do_visual_slide(var/atom/movable/sliding, var/turf/from, var/from_pixel_x, var/from_pixel_y, var/turf/target, var/target_pixel_x, var/target_pixel_y, var/center_of_mass)
+	set waitfor = FALSE
+	var/start_pixel_x = sliding.pixel_x - ((target.x-from.x) * world.icon_size)
+	var/start_pixel_y = sliding.pixel_y - ((target.y-from.y) * world.icon_size)
+	// Clear our glide so we don't do an animation when dropped into the target turf.
+	var/old_animate_movement = sliding.animate_movement
+	sliding.animate_movement = NO_STEPS
+	sleep(2 * world.tick_lag) // Due to BYOND being byond, animate_movement has to be set for at least 2 ticks before gliding will be disabled.
+	sliding.forceMove(target)
+	// Reset our glide_size now that movement has completed.
+	sliding.animate_movement = old_animate_movement
+	sliding.pixel_x = start_pixel_x
+	sliding.pixel_y = start_pixel_y
+	if(center_of_mass)
+		target_pixel_x -= center_of_mass["x"]
+		target_pixel_y -= center_of_mass["y"]
+	animate(sliding, pixel_x = target_pixel_x, pixel_y = target_pixel_y, time = 1 SECOND)

code/_onclick/drag_drop.dm

@@ -4,9 +4,9 @@
 	almost anything into a trash can.
 */
 
-/atom/MouseDrop(src_object, over_object, src_location, over_location, src_control, over_control, params)
+/atom/MouseDrop(over_object, src_location, over_location, src_control, over_control, params)
 	SHOULD_CALL_PARENT(TRUE)
-	if(!can_mouse_drop(src_object, usr, params = params) || !handle_mouse_drop(src_object, usr, params))
+	if(!can_mouse_drop(over_object, usr, params = params) || !handle_mouse_drop(over_object, usr, params))
 		. = ..()
 
 /atom/proc/handle_mouse_drop(atom/over, mob/user, params)

code/game/objects/item.dm

@@ -266,11 +266,13 @@
 	if(istype(over, /obj/structure))
 		var/obj/structure/struct = over
 		if(struct.structure_flags & STRUCTURE_FLAG_SURFACE)
-			if(user == loc && !user.try_unequip(src))
+			if(user == loc && !user.try_unequip(src, get_turf(user)))
 				return TRUE
-			if(isturf(loc))
-				dropInto(get_turf(over))
+			if(!isturf(loc))
 				return TRUE
+			var/list/click_data = params2list(params)
+			do_visual_slide(src, get_turf(src), pixel_x, pixel_y, get_turf(over), text2num(click_data["icon-x"])-1, text2num(click_data["icon-y"])-1, center_of_mass && cached_json_decode(center_of_mass))
+			return TRUE
 
 	// Try to drag-equip the item.
 	var/obj/screen/inventory/inv = over

code/modules/mob/observer/ghost/ghost.dm

@@ -418,9 +418,9 @@ This is the proc mobs get to turn into a ghost. Forked from ghostize due to comp
 	show_browser(src, dat, "window=manifest;size=370x420;can_close=1")
 
 //This is called when a ghost is drag clicked to something.
-/mob/observer/ghost/MouseDrop(src_object, over_object, src_location, over_location, src_control, over_control, params)
+/mob/observer/ghost/MouseDrop(over_object, src_location, over_location, src_control, over_control, params)
 	SHOULD_CALL_PARENT(FALSE)
-	var/atom/over = src_object
+	var/atom/over = over_object
 	if(!usr || !over)
 		return
 	if(isghost(usr) && usr.client && isliving(over))