diff options
Diffstat (limited to 'builtin/common/vector.lua')
| -rw-r--r-- | builtin/common/vector.lua | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/builtin/common/vector.lua b/builtin/common/vector.lua index b04c12610..2ef8fc617 100644 --- a/builtin/common/vector.lua +++ b/builtin/common/vector.lua @@ -12,6 +12,22 @@ function vector.new(a, b, c) return {x=0, y=0, z=0} end +function vector.from_string(s, init) + local x, y, z, np = string.match(s, "^%s*%(%s*([^%s,]+)%s*[,%s]%s*([^%s,]+)%s*[,%s]" .. + "%s*([^%s,]+)%s*[,%s]?%s*%)()", init) + x = tonumber(x) + y = tonumber(y) + z = tonumber(z) + if not (x and y and z) then + return nil + end + return {x = x, y = y, z = z}, np +end + +function vector.to_string(v) + return string.format("(%g, %g, %g)", v.x, v.y, v.z) +end + function vector.equals(a, b) return a.x == b.x and a.y == b.y and |