Drop the Crate

decaobr · March 9, 2014, 8:07am

So guys i’m trying to make the crate drop only when the crate is tapped, my code was working but after i added a new object to scene the crate is not falling anymore, this is my code.

local function crateTapped( event ) &nbsp;&nbsp;&nbsp;&nbsp;if (event.target.gravityScale == 0) then &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;event.target.gravityScale = 1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print( "Tapped" ) &nbsp;&nbsp;&nbsp;&nbsp;end end &nbsp;&nbsp;&nbsp;&nbsp;-- make a crate (off-screen), position it, and rotate slightly

&nbsp;&nbsp;&nbsp;&nbsp;local crate = display.newImageRect( "crate.png", 45, 45 ) &nbsp;&nbsp;&nbsp;&nbsp;crate.x, crate.y = 60, 0 &nbsp;&nbsp;&nbsp;&nbsp;crate.rotation = 15 &nbsp;&nbsp;&nbsp;&nbsp;crate:addEventListener( "tap", crateTapped ) &nbsp;&nbsp;&nbsp;&nbsp;-- add physics to the crate &nbsp;&nbsp;&nbsp;&nbsp;physics.addBody( crate, { density=1.0, friction=0.3, bounce=0.3 } ) &nbsp;&nbsp;&nbsp;&nbsp;crate.gravityScale = 0&nbsp; &nbsp;

The Tapped gets printed, but the crate does not “fall”

ulydev5 · March 9, 2014, 1:16pm

You could do :

local crateDropped = 0 --&nbsp;make a crate&nbsp;(off-screen),&nbsp;position it,&nbsp;and&nbsp;rotate slightly local&nbsp;crate&nbsp;=&nbsp;display.newImageRect(&nbsp;"crate.png",&nbsp;45,&nbsp;45&nbsp;) crate.x,&nbsp;crate.y&nbsp;=&nbsp;60,&nbsp;0 crate.rotation&nbsp;=&nbsp;15 local function crateTapped( event ) &nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;crateDropped == 0&nbsp;then &nbsp; &nbsp; &nbsp; &nbsp; --add physics to the crate &nbsp; &nbsp; &nbsp; &nbsp; physics.addBody(&nbsp;crate,&nbsp;{&nbsp;density=1.0,&nbsp;friction=0.3,&nbsp;bounce=0.3&nbsp;}&nbsp;) &nbsp; &nbsp; &nbsp; &nbsp; crateDropped = 1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print( "Tapped" ) &nbsp;&nbsp;&nbsp;&nbsp;end end crate:addEventListener(&nbsp;"tap",&nbsp;crateTapped&nbsp;)&nbsp;

ulydev5 · March 9, 2014, 1:16pm

You could do :

local crateDropped = 0 --&nbsp;make a crate&nbsp;(off-screen),&nbsp;position it,&nbsp;and&nbsp;rotate slightly local&nbsp;crate&nbsp;=&nbsp;display.newImageRect(&nbsp;"crate.png",&nbsp;45,&nbsp;45&nbsp;) crate.x,&nbsp;crate.y&nbsp;=&nbsp;60,&nbsp;0 crate.rotation&nbsp;=&nbsp;15 local function crateTapped( event ) &nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;crateDropped == 0&nbsp;then &nbsp; &nbsp; &nbsp; &nbsp; --add physics to the crate &nbsp; &nbsp; &nbsp; &nbsp; physics.addBody(&nbsp;crate,&nbsp;{&nbsp;density=1.0,&nbsp;friction=0.3,&nbsp;bounce=0.3&nbsp;}&nbsp;) &nbsp; &nbsp; &nbsp; &nbsp; crateDropped = 1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;print( "Tapped" ) &nbsp;&nbsp;&nbsp;&nbsp;end end crate:addEventListener(&nbsp;"tap",&nbsp;crateTapped&nbsp;)&nbsp;