breakout collision

marcomm3007 · August 9, 2014, 10:20am

Hi everyone,
I’m contacting you cause I’ve got a code issue on “breackout”. I’ve inserted a code that allows the bricks to be indestructible and the code was working correctly on a single brick. After that I’ve inserted a table in the “cicle for” to create more bricks. When I used the table the code stopped working. An error doesn’t appear but the ball slides around the bricks. Where have I gone wrong? I will also post the code for you.

–table

local levels = {}

levels[2] = {{0,0,0,0,0,0,0,0,0,0,0,0},

{0,0,0,0,0,0,0,0,0,0,0,0},

{0,0,0,0,1,0,1,0,0,0,0,0},

{0,0,0,0,0,1,0,0,0,0,0,0},

{1,0,1,0,0,1,0,1,0,0,1,0},}

– change level

function changeLevel()

– Pulizia del gruppo mattoni

mattoni:removeSelf()

mattoni.numChildren = 0

mattoni = display.newGroup()

if vy > 0 then vy = -vy

end

vx = vx + 0.5

vy = vy - 0.5

vLevel = vy

alertBox:removeEventListener(“tap”, changeLevel)

alertDisplayGroup:removeSelf()

alertDisplayGroup = nil

paddle.x = 240; paddle.y = 300

ball.x = 240; ball.y = 275

currentLevel = currentLevel + 1

levelNum = display.newText(currentLevel, 460, 8, “Arial”, 14)

levelNum:setFillColor(255, 255, 255, 255)

if vite == 3 then

lifeNum:removeSelf()

lifeNum = nil

lifeNum = display.newText(vite, 460, 25, “Arial”, 14)

lifeNum:setFillColor(255, 255, 255, 255)

end

gameLevels((levels[2]))

end

–Game Listener

function gameListeners(event)

if event == “add” then

Runtime:addEventListener(“accelerometer”, movePaddle)

– Utilizzo del trascinamento, atttivo solo nel simulatore

paddle:addEventListener(“touch”, dragPaddle)

– Gesione della palla

Runtime:addEventListener(“enterFrame”, updateBall)

paddle:addEventListener(“collision”, bounce)

ball:addEventListener(“collision”, removeBrick)

elseif event == “remove” then

Runtime:removeEventListener(“accelerometer”, movePaddle)

– Utilizzo del trascinamento, atttivo solo nel simulatore

paddle:removeEventListener(“touch”, dragPaddle)

– Gesione della palla

Runtime:removeEventListener(“enterFrame”, updateBall)

paddle:removeEventListener(“collision”, bounce)

ball:removeEventListener(“collision”, removeBrick)

end

–LEVEL

function gameLevels(level)

mattoni1:toFront()

local len = table.maxn(level)

for i = 1, len do

for j = 1, W_LEN do

if(level[i][j] == 1) then

local mattoneRosso = display.newImage(‘mattone02.png’)

mattoneRosso.name = ‘mattoneRosso’

mattoneRosso.x = BRICK_W * j - OFFSET

mattoneRosso.y = BRICK_H * i

physics.addBody(mattoneRosso, {density = 1, friction = 0, bounce = 0})

mattoneRosso.bodyType = ‘static’

mattoni1:insert( mattoneRosso )

end

background:addEventListener(“tap”, startGame)

end

function updateBall()

ball.x = ball.x + vx

ball.y = ball.y + vy

–CODE FOR MATTONEROSSO

if (ball.y + ball.height*.5 >= mattoneRosso.y - mattoneRosso.contentHeight*.5 and ball.y - ball.height*.5 <= mattoneRosso.y + mattoneRosso.contentHeight*.5) then

if (ball.x+ball.width*.5 >= mattoneRosso.x - mattoneRosso.width/2 and ball.x - ball.width*.5 <= mattoneRosso.x + mattoneRosso.width/2) then

vy = -vy

end

if ball.x < 0 or ball.x + ball.width > display.contentWidth then

vx = -vx

end – Collisione con le pareti laterali

if ball.y < 0 then

vy = -vy

end

if ball.y + ball.height > paddle.y + paddle.height then

gameListeners(“remove”)

ball.x = 240; ball.y = 275 – reset della palla

paddle.x = 240; paddle.y = 300 – reset del paddle

vy = -vy – reset direzione

vite = vite - 1

if vite < 0 then resetGame()

else

lifeNum:removeSelf()

lifeNum = nil

lifeNum = display.newText(vite, 460, 25, “Arial”, 14)

lifeNum:setFillColor(255, 255, 255, 255)

background:addEventListener(“tap”, startGame)

end

marcomm3007 · August 9, 2014, 8:07pm

No one can help me?

paulscottrobson · August 9, 2014, 9:17pm

It’s quite hard to debug code anyway and it isn’t helped when the indentation is lost and half of it is in Italian (not your fault). I can’t see any indestructible brick code.

When bounces go ‘around the edge’, it is sometimes because the velocity has changed but it is still within the capture area ; so it keeps bouncing because it never gets sufficiently far away from the thing its bouncing off.

When you have a brick collision (this is CODE FOR MATTONEROSSO ?) try deducting vx,vy from the ball positions before reversing the velocity, this *might* fix it.

marcomm3007 · August 10, 2014, 10:49am

I translated the code in english

–table

local levels = {}

levels[2] = {{0,0,0,0,0,0,0,0,0,0,0,0},

{0,0,0,0,0,0,0,0,0,0,0,0},

{0,0,0,0,1,0,1,0,0,0,0,0},

{0,0,0,0,0,1,0,0,0,0,0,0},

{1,0,1,0,0,1,0,1,0,0,1,0},}

– change level

function changeLevel()

–reset bricks

bricks:removeSelf()

bricks.numChildren = 0

bricks = display.newGroup()

if vy > 0 then vy = -vy

end

vx = vx + 0.5

vy = vy - 0.5

vLevel = vy

–reset alertBox

alertBox:removeEventListener(“tap”, changeLevel)

alertDisplayGroup:removeSelf()

alertDisplayGroup = nil

--reset paddle / ball

paddle.x = 240; paddle.y = 300

ball.x = 240; ball.y = 275

currentLevel = currentLevel + 1

levelNum = display.newText(currentLevel, 460, 8, “Arial”, 14)

levelNum:setFillColor(255, 255, 255, 255)

if life == 3 then

lifeNum:removeSelf()

lifeNum = nil

lifeNum = display.newText(vite, 460, 25, “Arial”, 14)

lifeNum:setFillColor(255, 255, 255, 255)

end

gameLevels((levels[2]))

end

–Game Listener

function gameListeners(event)

if event == “add” then

Runtime:addEventListener(“accelerometer”, movePaddle)

paddle:addEventListener(“touch”, dragPaddle)

Runtime:addEventListener(“enterFrame”, updateBall)

paddle:addEventListener(“collision”, bounce)

ball:addEventListener(“collision”, removeBrick)

elseif event == “remove” then

Runtime:removeEventListener(“accelerometer”, movePaddle)

paddle:removeEventListener(“touch”, dragPaddle)

Runtime:removeEventListener(“enterFrame”, updateBall)

paddle:removeEventListener(“collision”, bounce)

ball:removeEventListener(“collision”, removeBrick)

end

–LEVEL

function gameLevels(level)

bricks:toFront()

local len = table.maxn(level)

for i = 1, len do

for j = 1, W_LEN do

if(level[i][j] == 1) then

local redBrick = display.newImage(‘mattone02.png’)

redBrick.name = ‘redBrick’

redBrick.x = BRICK_W * j - OFFSET

redBrick.y = BRICK_H * i

physics.addBody(redBrick, {density = 1, friction = 0, bounce = 0})

redBrick.bodyType = ‘static’

bricks:insert( redBrick )

end

background:addEventListener(“tap”, startGame)

end

function updateBall()

ball.x = ball.x + vx

ball.y = ball.y + vy

–collision with redBrick

if (ball.y + ball.height*.5 >= redBrick.y - redBrick.contentHeight*.5 and ball.y - ball.height*.5 <= redBrick.y + redBrick.contentHeight*.5) then

if (ball.x+ball.width*.5 >= redBrick.x - redBrick.width/2 and ball.x - ball.width*.5 <= redBrick.x + redBrick.width/2) then

vy = -vy

end

–collision with lateral walls

if ball.x < 0 or ball.x + ball.width > display.contentWidth then

vx = -vx

end

if ball.y < 0 then

vy = -vy

end

if ball.y + ball.height > paddle.y + paddle.height then

gameListeners(“remove”)

ball.x = 240; ball.y = 275 – reset ball

paddle.x = 240; paddle.y = 300 – reset paddle

vy = -vy – reset direction ball

vite = vite - 1

if vite < 0 then resetGame()

else

lifeNum:removeSelf()

lifeNum = nil

lifeNum = display.newText(vite, 460, 25, “Arial”, 14)

lifeNum:setFillColor(255, 255, 255, 255)

background:addEventListener(“tap”, startGame)

end

Thanks for your solution but this doesn’t work. The redbrick function starts only if the table is not uploaded, if I insert the table with “cicle for” doesn’t work. When I put the red brick outside table all goes okay.

This is my problem. Thanks for solutions.

marcomm3007 · August 9, 2014, 8:07pm

No one can help me?

paulscottrobson · August 9, 2014, 9:17pm

It’s quite hard to debug code anyway and it isn’t helped when the indentation is lost and half of it is in Italian (not your fault). I can’t see any indestructible brick code.

When bounces go ‘around the edge’, it is sometimes because the velocity has changed but it is still within the capture area ; so it keeps bouncing because it never gets sufficiently far away from the thing its bouncing off.

When you have a brick collision (this is CODE FOR MATTONEROSSO ?) try deducting vx,vy from the ball positions before reversing the velocity, this *might* fix it.

marcomm3007 · August 10, 2014, 10:49am

I translated the code in english

–table

local levels = {}

levels[2] = {{0,0,0,0,0,0,0,0,0,0,0,0},

{0,0,0,0,0,0,0,0,0,0,0,0},

{0,0,0,0,1,0,1,0,0,0,0,0},

{0,0,0,0,0,1,0,0,0,0,0,0},

{1,0,1,0,0,1,0,1,0,0,1,0},}

– change level

function changeLevel()

–reset bricks

bricks:removeSelf()

bricks.numChildren = 0

bricks = display.newGroup()

if vy > 0 then vy = -vy

end

vx = vx + 0.5

vy = vy - 0.5

vLevel = vy

–reset alertBox

alertBox:removeEventListener(“tap”, changeLevel)

alertDisplayGroup:removeSelf()

alertDisplayGroup = nil

--reset paddle / ball

paddle.x = 240; paddle.y = 300

ball.x = 240; ball.y = 275

currentLevel = currentLevel + 1

levelNum = display.newText(currentLevel, 460, 8, “Arial”, 14)

levelNum:setFillColor(255, 255, 255, 255)

if life == 3 then

lifeNum:removeSelf()

lifeNum = nil

lifeNum = display.newText(vite, 460, 25, “Arial”, 14)

lifeNum:setFillColor(255, 255, 255, 255)

end

gameLevels((levels[2]))

end

–Game Listener

function gameListeners(event)

if event == “add” then

Runtime:addEventListener(“accelerometer”, movePaddle)

paddle:addEventListener(“touch”, dragPaddle)

Runtime:addEventListener(“enterFrame”, updateBall)

paddle:addEventListener(“collision”, bounce)

ball:addEventListener(“collision”, removeBrick)

elseif event == “remove” then

Runtime:removeEventListener(“accelerometer”, movePaddle)

paddle:removeEventListener(“touch”, dragPaddle)

Runtime:removeEventListener(“enterFrame”, updateBall)

paddle:removeEventListener(“collision”, bounce)

ball:removeEventListener(“collision”, removeBrick)

end

–LEVEL

function gameLevels(level)

bricks:toFront()

local len = table.maxn(level)

for i = 1, len do

for j = 1, W_LEN do

if(level[i][j] == 1) then

local redBrick = display.newImage(‘mattone02.png’)

redBrick.name = ‘redBrick’

redBrick.x = BRICK_W * j - OFFSET

redBrick.y = BRICK_H * i

physics.addBody(redBrick, {density = 1, friction = 0, bounce = 0})

redBrick.bodyType = ‘static’

bricks:insert( redBrick )

end

background:addEventListener(“tap”, startGame)

end

function updateBall()

ball.x = ball.x + vx

ball.y = ball.y + vy

–collision with redBrick

if (ball.y + ball.height*.5 >= redBrick.y - redBrick.contentHeight*.5 and ball.y - ball.height*.5 <= redBrick.y + redBrick.contentHeight*.5) then

if (ball.x+ball.width*.5 >= redBrick.x - redBrick.width/2 and ball.x - ball.width*.5 <= redBrick.x + redBrick.width/2) then

vy = -vy

end

–collision with lateral walls

if ball.x < 0 or ball.x + ball.width > display.contentWidth then

vx = -vx

end

if ball.y < 0 then

vy = -vy

end

if ball.y + ball.height > paddle.y + paddle.height then

gameListeners(“remove”)

ball.x = 240; ball.y = 275 – reset ball

paddle.x = 240; paddle.y = 300 – reset paddle

vy = -vy – reset direction ball

vite = vite - 1

if vite < 0 then resetGame()

else

lifeNum:removeSelf()

lifeNum = nil

lifeNum = display.newText(vite, 460, 25, “Arial”, 14)

lifeNum:setFillColor(255, 255, 255, 255)

background:addEventListener(“tap”, startGame)

end

Thanks for your solution but this doesn’t work. The redbrick function starts only if the table is not uploaded, if I insert the table with “cicle for” doesn’t work. When I put the red brick outside table all goes okay.

This is my problem. Thanks for solutions.