love.graphics.polygon Help

[Someguynamedpie]

Whats the syntax for it? I thought it was {{X=0,Y=2},etc}

[TechnoCat]

love.graphics.polygon()
love.graphics.polygon("line",0,0,10,0,0,10) would make a triangle from 0,0 10,0 to 0,10 I believe.

[Snow]

If you already have a table of vertices you can use Lua's unpack(table) like love.graphics.polygon('line', unpack({x1, y1, x2, y2, x3, y3, ...})). I think it should work anyway.

[Robin]

If you already have a table of vertices you can use Lua's unpack(table) like love.graphics.polygon('line', unpack({x1, y1, x2, y2, x3, y3, ...})). I think it should work anyway.

Not if they use the format {{x, y}, {x, y}, ...}, though.

[Snow]

Not if they use the format {{x, y}, {x, y}, ...}, though.

Just tested it, TechnoCat had it right and unpacking works.
Edit: Right, on the wiki it accepts a table also so instead of using unpack you can just wrap the list in braces, like {x1, y1, x2, y2, ...}.

[Someguynamedpie]

Im having trouble: I have points formatted like this:
{{x=10,y=10},{x=30,y=30}}, how would i format it into 1 table like {10,10,30,30}?

[Snow]

Im having trouble: I have points formatted like this:
{{x=10,y=10},{x=30,y=30}}, how would i format it into 1 table like {10,10,30,30}?

Code: Select all

points = {{x=10,y=10},{x=30,y=30}}
pointStack = {}

for k, v in pairs(points) do
table.insert(pointStack, v.x)
table.insert(pointStack, v.y)
end

This should do it.

[rhezalouis]

IIRC, the love.graphics.polygon handles both the

Code: Select all

love.graphics.polygon("line", 10, 10, 20, 20, 10, 20);--and
love.graphics.polygon("line", {10, 10, 20, 20, 10, 20});

you don't need to unpack the list of coordinates. :glee:

[thelinx]

IIRC, the love.graphics.polygon handles both the

Code: Select all

love.graphics.polygon("line", 10, 10, 20, 20, 10, 20);--and
love.graphics.polygon("line", {10, 10, 20, 20, 10, 20});

you don't need to unpack the list of coordinates. :glee:

According to the wiki, this is the case.

[pekka]

The second form was added to the docs quite recently, so it might not be widely known. I know this because I am the one responsible for adding it. I discovered the other usage from reading the C++ source and dutifully added it to the docs. I also had an example code snippet there, but then a site crash occurred ( ) and reverted the Wiki a couple of days backwards. I redid the explanation, but omitted the code example the second time, out of laziness probably.

It would probably be good to have a code snippet using both ways to draw a simple polygon there. I can add one soon, once I am on a LOVELY computer again. But anyone else can do it too