World:queryBoundingBox not finding any fixtures

[TheHUG]

Hi!
I'm trying to use World:queryBoundingBox(), but it doesn't seem to find anything. using windfield's query functions does work, and though I can't tell what I'm not doing that they are, I can't get it to work for myself. a minimal example is:

Code: Select all

function love.load(arg)
   midx = love.graphics.getWidth()/2
   midy = love.graphics.getHeight()/2

   w = love.physics.newWorld()
   bod = love.physics.newBody(w, midx, midy, 'dynamic')
   shp = love.physics.newCircleShape(midx, midy, 10)
   fix = love.physics.newFixture(bod, shp, 1)
   callback = function(fixture)
      print(fixture)
      return true
   end
   w:queryBoundingBox(midx +10, midy + 10, midx - 10, midy - 10 , callback)
end

function love.update(dt)
end

function love.draw()
end

I'd expect this to print at least one fixture, but it isn't printing anything. What am I doing wrong?

[pgimeno]

The shape is relative to the body. Create the shape at 0, 0 instead of midx, midy and it will work. The way you're doing it, it's being created at 2*midx, 2*midy, and indeed, querying a bounding box centered at 2*midx, 2*midy reports it, but that doesn't seem to be what you're after.

Also, your bounding box limits are inverted, though that doesn't seem to matter for some reason.

[TheHUG]

Oh yeah whoops, that explains, thanks!

And yeah I posted the wrong version, I had inverted the points to see if I was putting them in the wrong way around and forgot to put it back for the example