non-physics object collision / touching event

Physics
#1

I have two objects: a circle and a moving rectangle.

I want to trigger an event when the two objects touch.

I just want an event triggered. I do not want them to bounce off each other.

#2

Make them dynamic physics objects and set their isSensor property to true. Check the docs to see how. You will need to add a listener to each (or a global Runtime listener, but I don’t recommend this) to receive the event.

#3

thanks Horacebury,

that was a good step. Unfortunately my code doesn’t trigger the event i want.

Here is my code:

rectCollisionFilter = { categoryBits = 8, maskBits = 16 } rectBodyElement = { friction=0.4, bounce=0.8, filter=rectCollisionFilter } local fireRect = display.newRect( 125, 30, 70, 230 ) physics.addBody( fireRect, "static", rectBodyElement ) fireRect.myName = "fireRect" circleCollisionFilter = { categoryBits = 16, maskBits = 8} circleBodyElement = { friction=0.4, bounce=0.8, filter=circleCollisionFilter } local testCircle = display.newCircle( 200, 230, 70 ) testCircle.myName = "CIRCLE1" testCircle.isSensor = true physics.addBody( testCircle, "static", circleBodyElement ) local function onLocalCollision( self, event )     print( "COLLIDE" )     print( "target " .. event.target.myName )     print( "other " .. event.other.myName ) end testCircle.collision = onLocalCollision testCircle:addEventListener( "collision", testCircle )

I move the fireRect object over the circle but my function is never called.

What am I doing wrong?

#4

at least one body must be dynamic (as per @horacebury already) statics do not collide w each other

#5

Make them dynamic physics objects and set their isSensor property to true. Check the docs to see how. You will need to add a listener to each (or a global Runtime listener, but I don’t recommend this) to receive the event.

#6

thanks Horacebury,

that was a good step. Unfortunately my code doesn’t trigger the event i want.

Here is my code:

rectCollisionFilter = { categoryBits = 8, maskBits = 16 } rectBodyElement = { friction=0.4, bounce=0.8, filter=rectCollisionFilter } local fireRect = display.newRect( 125, 30, 70, 230 ) physics.addBody( fireRect, "static", rectBodyElement ) fireRect.myName = "fireRect" circleCollisionFilter = { categoryBits = 16, maskBits = 8} circleBodyElement = { friction=0.4, bounce=0.8, filter=circleCollisionFilter } local testCircle = display.newCircle( 200, 230, 70 ) testCircle.myName = "CIRCLE1" testCircle.isSensor = true physics.addBody( testCircle, "static", circleBodyElement ) local function onLocalCollision( self, event )     print( "COLLIDE" )     print( "target " .. event.target.myName )     print( "other " .. event.other.myName ) end testCircle.collision = onLocalCollision testCircle:addEventListener( "collision", testCircle )

I move the fireRect object over the circle but my function is never called.

What am I doing wrong?

#7

at least one body must be dynamic (as per @horacebury already) statics do not collide w each other