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| − | Is this example too long? --[[User:Technocat|Technocat]]
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| − | <source lang="lua">
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| − | --[[
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| − | Displays text after any callback event for collisions in a world.
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| − | --]]
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| − | text = ""
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| − | function love.load()
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| − | world = love.physics.newWorld(800,600)
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| − | world:setGravity(0,20)
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| − | --The four callback names can be anything you want.
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| − | world:setCallbacks(add, persist, rem, result)
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| − | ball = {}
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| − | ball.b = love.physics.newBody(world, 400,200, 10,0)
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| − | ball.s = love.physics.newCircleShape(ball.b, 0,0, 50)
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| − | ball.s:setData("Ball")
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| − | static = {}
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| − | static.b = love.physics.newBody(world, 400,400, 0,0)
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| − | static.s = love.physics.newRectangleShape(static.b, -100,-25, 200,50, 0)
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| − | static.s:setData("Block")
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| − | end
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| − |
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| − | function love.update(dt)
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| − | world:update(dt)
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| − | end
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| − | function love.draw()
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| − | love.graphics.circle("line", ball.b:getX(),ball.b:getY(), ball.s:getRadius())
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| − | local x1,y1, _,_, x3,y3, _,_ = static.s:getBoundingBox()
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| − | local w = x3-x1
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| − | local h = y3-y1
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| − | love.graphics.rectangle("line",
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| − | static.b:getX()-w/2,static.b:getY(),
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| − | w,h, 0)
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| − | love.graphics.print(text,0,12)
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| − | end
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| − |
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| − | --Refer to http://love2d.org/wiki/Contact for more information on collision objects
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| − | --'coll' is an object created by the collision
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| − | --'a' is the first object in the collision and 'b' is the second
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| − |
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| − | function persist(a, b, coll)
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| − | text = text..a.." touching "..b.."\n"
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| − | end
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| − | function persist(a, b, coll)
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| − | text = text..a.." touching "..b.."\n"
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| − | end
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| − | function rem(a, b, coll)
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| − | text = text..a.." uncolliding "..b.."\n"
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| − | end
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| − | function result(a, b, coll)
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| − | text = text..a.." hit "..b.."resulting with "..coll:getNormal().."\n"
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| − | end
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| − | </source>
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| − |
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| − | ===Add Callback===
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| − | This callback is called every time two objects are newly touching.
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| − | <source lang="lua">
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| − | function add(a, b, coll)
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| − | text = text..a.." collding with "..b.." at an angle of "..coll:getNormal().."\n"
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| − | end
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| − | </source>
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| − | ===Persist Callback===
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| − | This callback is called every time two objects are still touching.
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| − | <source lang="lua">
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| − | function persist(a, b, coll)
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| − | text = text..a.." touching "..b.."\n"
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| − | end
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| − | </source>
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| − | ===Remove Callback===
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| − | This callback is called every time two objects are no longer touching.
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| − | <source lang="lua">
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| − | function rem(a, b, coll)
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| − | text = text..a.." uncolliding "..b.."\n"
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| − | end
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| − | </source>
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| − | ===Result Callback===
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| − | This callback is called every time two objects ???.
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| − | <source lang="lua">
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| − | function result(a, b, coll)
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| − | text = text..a.." hit "..b.."resulting with "..coll:getNormal().."\n"
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| − | end
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| − | </source>
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