Grimrock

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if direction == 0 then y = y-1 else if direction == 1 then x = x+1 else if direction == 2 then y = y+1 else x = x-1 end end end

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function checkwall()
	local direction = party.facing
	local x = party.x
	local y = party.y
	local elevation = party.elevation
	local myx = x
	local myy = y
	if direction == 0 then
		myy = y - 1
	elseif direction == 1 then
		myx = x + 1
	elseif direction == 2 then
		myy = y + 1
	elseif direction == 3 then
		myx = x - 1
	end
	if not party.map:checkLineOfFire(x,y,myx,myy,elevation) then
		return true
	else
		return false
	end
end

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defineSpell{
	name = "my_fireball",
	uiName = "Fireball",
	gesture = 1,
	manaCost = 10,
	onCast  = function(champion, x, y, direction, elevation, skillLevel)
		local myx = x
		local myy = y
		if direction == 0 then myy = y - 0.5 end
		if direction == 1 then myx = x + 0.5 end
		if direction == 2 then myy = y + 0.5 end
		if direction == 3 then myx = x - 0.5 end
		if dep.script:checkwall() then	
			spawn("projectile_fireball", party.level, x, y, direction, elevation)
		else
			spawn("projectile_fireball", party.level, myx, myy, direction, elevation)
		end
	end,
	skill = "fire_magic",
	requirements = { "fire_magic", 0},
	icon = 61,
	spellIcon = 7,
	description = "A flaming ball of fire shoots from your fingertips causing devastating damage to your foes.",
}