The Big Programming Thread - Page 443

...\main.lua:178:attempt to concatenate field 'name' (a nil value)

function playGame()
    -- Display the ship
    ship = display.newRect(ship);
    shipLayer:insert(ship);
    -- Add physics to ship
    physics.addBody(ship, {density = 3, bounce = 0.3});

    ...

    beginRun();
end

function beginRun()
    ...
    spawnTunnel(1100); -- this just calls the createTunnel function at a specific location
    gameListeners("add");
    ...
end

function gameListeners(event)
    if event == "add" then
        ship.collision = onCollision;
        ship:addEventListener("collision", ship);
        -- repeat above two lines for top
        -- and again for bottom
    end
end

-- Collision handler
function onCollision(self,event)  
    if ( event.phase == "began" ) then
        -- line 178 is right below this line  ----------------------------------
        print( self.name .. ": collision began with " .. event.other.name )
end

-- Create a "tunnel" using 2 rectangles
function createTunnel(center, xLoc)
    -- Create top and bottom rectangles, both named "box"
    top = display.newRect(stuff);
    top.name = "wall";
    bottom = display.newRect(stuff);
    bottom.name = "wall";

    -- Add them to the middleLayer group
    middleLayer:insert(top);
    middleLayer:insert(bottom);

    -- Add physics to the rectangles
    physics.addBody(top, "static", {bounce = 0.3});
    physics.addBody(bottom, "static", {bounce = 0.3});
end