132 lines
3.5 KiB
Lua
132 lines
3.5 KiB
Lua
--[[
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Copyright (C) 2020 Astie Teddy
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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]]
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local new = ffi.new
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-- Load*() wrappers.
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if raylua.loadfile then
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local LoadMusicStream = rl.LoadMusicStream
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function rl.LoadMusicStream(path)
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local f, err = raylua.loadfile(path)
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if f then
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local ext = "." .. path:gsub(".+%.", "")
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return rl.LoadMusicStreamFromMemory(ext, ffi.cast("void *", f), #f)
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else
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print(("RAYLUA: %s"):format(err))
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return LoadMusicStream(path)
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end
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end
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end
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-- math metamethods
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ffi.metatype("Vector2", {
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__add = function (a, b)
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if ffi.istype("Vector2", b) then
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return new("Vector2", a.x + b.x, a.y + b.y)
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else
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error "Invalid operation."
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end
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end,
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__sub = function (a, b)
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if ffi.istype("Vector2", b) then
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return new("Vector2", a.x - b.x, a.y - b.y)
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else
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error "Invalid operation."
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end
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end,
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__unm = function (a)
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return new("Vector2", -a.x, -a.y)
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end,
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__len = function (a)
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return math.sqrt(a.x * a.x + a.y * a.y)
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end,
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__mul = function (a, b)
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if type(a) == "number" then
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-- swap if a is a number (a * vector)
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a, b = b, a
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end
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if ffi.istype("Vector2", b) then -- dot product
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return a.x * b.x + a.y * b.y
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elseif type(b) == "number" then
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return new("Vector2", a.x * b, a.y * b)
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else
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error "Invalid operation."
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end
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end,
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__div = function (a, b)
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if type(b) == "number" then
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return new("Vector2", a.x / b, a.y / b)
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else
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error "Invalid operation"
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end
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end,
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__tostring = function (a)
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return string.format("Vector2: (%g %g)", a.x, a.y)
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end
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})
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ffi.metatype("Vector3", {
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__add = function (a, b)
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if ffi.istype("Vector3", b) then
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return new("Vector3", a.x + b.x, a.y + b.y, a.z + b.z)
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else
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error "Invalid operation."
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end
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end,
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__sub = function (a, b)
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if ffi.istype("Vector3", b) then
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return new("Vector3", a.x - b.x, a.y - b.y, a.z - b.z)
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else
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error "Invalid operation."
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end
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end,
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__unm = function (a)
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return new("Vector3", -a.x, -a.y, -a.z)
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end,
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__len = function (a)
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return math.sqrt(a.x * a.x + a.y * a.y + a.z * a.z)
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end,
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__mul = function (a, b)
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if type(a) == "number" then
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-- swap if a is a number (a * vector)
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a, b = b, a
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end
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if ffi.istype("Vector3", b) then -- dot product
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return a.x * b.x + a.y * b.y + a.z * b.z
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elseif type(b) == "number" then
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return new("Vector3", a.x * b, a.y * b, a.z * b)
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else
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error "Invalid operation."
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end
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end,
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__div = function (a, b)
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if type(b) == "number" then
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return new("Vector3", a.x / b, a.y / b, a.z / b)
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else
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error "Invalid operation"
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end
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end,
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__tostring = function (a)
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return string.format("Vector3: (%g %g %g)", a.x, a.y, a.z)
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end
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})
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-- TODO: Matrix and Quaternion
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