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authorRealBadAngel <maciej.kasatkin@o2.pl>2016-02-08 01:40:05 +0100
committerest31 <MTest31@outlook.com>2016-02-08 23:13:19 +0100
commit38e712260046f159aa201259569054bdf9793b7f (patch)
treea7e39e43109ea795ec3264752ccca660287ac130 /src/database-dummy.h
parentb44da4916aa09b27155ce6675cccbcc128b5a66c (diff)
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Use inventory_image in the first place for inventory item mesh
Diffstat (limited to 'src/database-dummy.h')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-17 08:37:54 +0000
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vector = {}

function vector.new(a, b, c)
	if type(a) == "table" then
		assert(a.x and a.y and a.z, "Invalid vector passed to vector.new()")
		return {x=a.x, y=a.y, z=a.z}
	elseif a then
		assert(b and c, "Invalid arguments for vector.new()")
		return {x=a, y=b, z=c}
	end
	return {x=0, y=0, z=0}
end

function vector.equals(a, b)
	return a.x == b.x and
	       a.y == b.y and
	       a.z == b.z
end

function vector.length(v)
	return math.hypot(v.x, math.hypot(v.y, v.z))
end

function vector.normalize(v)
	local len = vector.length(v)
	if len == 0 then
		return {x=0, y=0, z=0}
	else
		return vector.divide(v, len)
	end
end

function vector.round(v)
	return {
		x = math.floor(v.x + 0.5),
		y = math.floor(v.y + 0.5),
		z = math.floor(v.z + 0.5)
	}
end

function vector.distance(a, b)
	local x = a.x - b.x
	local y = a.y - b.y
	local z = a.z - b.z
	return math.hypot(x, math.hypot(y, z))
end

function vector.direction(pos1, pos2)
	local x_raw = pos2.x - pos1.x
	local y_raw = pos2.y - pos1.y
	local z_raw = pos2.z - pos1.z
	local x_abs = math.abs(x_raw)
	local y_abs = math.abs(y_raw)
	local z_abs = math.abs(z_raw)
	if x_abs >= y_abs and
	   x_abs >= z_abs then
		y_raw = y_raw * (1 / x_abs)
		z_raw = z_raw * (1 / x_abs)
		x_raw = x_raw / x_abs
	end
	if y_abs >= x_abs and
	   y_abs >= z_abs then
		x_raw = x_raw * (1 / y_abs)
		z_raw = z_raw * (1 / y_abs)
		y_raw = y_raw / y_abs
	end
	if z_abs >= y_abs and
	   z_abs >= x_abs then
		x_raw = x_raw * (1 / z_abs)
		y_raw = y_raw * (1 / z_abs)
		z_raw = z_raw / z_abs
	end
	return {x=x_raw, y=y_raw, z=z_raw}
end


function vector.add(a, b)
	if type(b) == "table" then
		return {x = a.x + b.x,
			y = a.y + b.y,
			z = a.z + b.z}
	else
		return {x = a.x + b,
			y = a.y + b,
			z = a.z + b}
	end
end

function vector.subtract(a, b)
	if type(b) == "table" then
		return {x = a.x - b.x,
			y = a.y - b.y,
			z = a.z - b.z}
	else
		return {x = a.x - b,
			y = a.y - b,
			z = a.z - b}
	end
end