Ball rotation?

horacebury · September 28, 2013, 10:38am

If you want to rotate a physics object use the code I posted here:

http://forums.coronalabs.com/topic/39690-rotate-a-physics-object/?p=206113

tramoale.at · September 28, 2013, 12:59pm

In my app there is a ball when i schoot it, the ball begans to rotate, but when the ball falls back to the ground, the rotation ends immediately and the ball continues to move without rotation!!

What can i do to avoid that the ball’s rotation ends before that the ball is stopped??

horacebury · September 28, 2013, 1:06pm

Post your code.

tramoale.at · September 28, 2013, 1:09pm

&nbsp; module(..., package.seeall) &nbsp; &nbsp; &nbsp; &nbsp; local W = display.contentWidth&nbsp; &nbsp;local H = display.contentHeight&nbsp; &nbsp; function new() local localGroup = display.newGroup() &nbsp; &nbsp; local localGroup = display.newGroup() &nbsp; local pausa = display.newImage("pausa.png") pausa.x = 600 pausa.y = 40 &nbsp; local bglivelli = display.newImage("grass.jpg") bglivelli.x = W/2 bglivelli.y = H/2 &nbsp; &nbsp; local levelText = display.newText("level 1", 45, 1200, "Arial", 50) &nbsp; &nbsp; local ground1 = display.newImage("linea.jpg") ground1.x = W/2 ground1.y = 1100 physics.addBody(ground1,"static",{}) &nbsp; local circle = display.newImage("palla.png", 80, 80) circle.x = 367 circle.y = 870&nbsp; &nbsp; &nbsp; physics.addBody(circle,"dinamic", {density = 1.0, friction = 0.3, bounce = 0.2, radius = 35}) &nbsp; &nbsp; local ground2 = display.newRect(0, 1280, 720, 1) physics.addBody(ground2, "static", {}) &nbsp; &nbsp; local roof1 = display.newRect(0, 0, 180, 0.5) physics.addBody(roof1, "static", {})&nbsp; &nbsp; local roof2 = display.newRect(540, 0, 180, 0.5) physics.addBody(roof2, "static", {})&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; local wallS = display.newRect(0,0,0.5, 1280) physics.addBody(wallS, "static", {}) &nbsp; local wallD = display.newRect(720, 0, 1, 1280) physics.addBody(wallD, "static", {}) &nbsp; local bar1 = display.newImage("bar.png") bar1.x = 180 bar1.y = 50 physics.addBody(bar1, "static", {}) &nbsp; local bar2 = display.newImage("bar.png") bar2.x = 540 bar2.y = 50 physics.addBody(bar2, "static", {}) &nbsp; local reloadB = display.newImage("reloadB.png") reloadB.x = 120 reloadB.y = 40 reloadB.scene = "level1" &nbsp; &nbsp; local sX = bar1.x local sY = bar1.y &nbsp; local eX = bar2.x local eY = bar2.y &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;localGroup:insert(roof1) &nbsp;localGroup:insert(roof2) &nbsp;localGroup:insert(bglivelli) &nbsp;localGroup:insert(ground1) &nbsp;localGroup:insert(levelText) &nbsp;localGroup:insert(circle) &nbsp;localGroup:insert(ground2) &nbsp;localGroup:insert(wallS) &nbsp;localGroup:insert(wallD) &nbsp;localGroup:insert(bar1) &nbsp;localGroup:insert(bar2) &nbsp;localGroup:insert(reloadB) &nbsp;localGroup:insert(pausa) &nbsp; &nbsp; &nbsp;function changeScene(e) if e.phase == "ended" then director:changeScene(e.target.scene) end end &nbsp; &nbsp;local physics=require ("physics") local isPaused = false &nbsp; function pausePhysics( event ) &nbsp; &nbsp; if "began" == event.phase then &nbsp; &nbsp; &nbsp; &nbsp; if isPaused == false then &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; physics.pause() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; isPaused = true &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local mainB = display.newImage("button1.png") &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; mainB.x = W/2 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mainB.y = H/2 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; mainB.scene = "menu" &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mainB:addEventListener("touch", changeScene) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local mainBText = display.newText("Main Menu", 0, 0, "Arial", 50) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mainBText.x = mainB.x &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mainBText.y = mainB.y &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local levelSelB = display.newImage("button1.png") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;levelSelB.x = mainB.x&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;levelSelB.y = mainB.y - 150 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;levelSelB.scene = "levelSel" &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;levelSelB:addEventListener("touch", changeScene) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;local levelSelBText = display.newText ("Level Select", 0, 0, "Arial", 40) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;levelSelBText.x = levelSelB.x &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;levelSelBText.y = levelSelB.y &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local resumeB = display.newImage("button1.png") &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;resumeB.x = mainB.x&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;resumeB.y = mainB.y + 150 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local resumeBText = display.newText("Continue", 0, 0, "Arial", 50) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;resumeBText.x = resumeB.x &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;resumeBText.y = resumeB.y &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;function resume(e) if "began" == event.phase then if isPaused == true then &nbsp;physics.start() &nbsp;isPaused = false &nbsp; &nbsp;--remove buttons &nbsp;mainB:removeSelf() &nbsp;mainBText:removeSelf() &nbsp;levelSelB:removeSelf() &nbsp;levelSelBText:removeSelf() &nbsp;resumeB:removeSelf() &nbsp;resumeBText:removeSelf() &nbsp;end &nbsp;end &nbsp;end &nbsp;resumeB:addEventListener("touch", resume) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;-- elseif isPaused == true then &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;-- physics.start() &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; --isPaused = false&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; end &nbsp; &nbsp; end end &nbsp; &nbsp; &nbsp; pausa:addEventListener( "touch", pausePhysics ) &nbsp; physics.start() &nbsp; &nbsp;function circleTouch(event) if event.phase == "began" then display.getCurrentStage():setFocus(circle) &nbsp; else if &nbsp;event.phase == "ended" then &nbsp; circle:removeEventListener("touch", circleTouch) &nbsp; circle:applyLinearImpulse(event.xStart - event.x, event.yStart - event.y, circle.x, circle.y) display.getCurrentStage():setFocus(nil) &nbsp; function rotateCircle() &nbsp;&nbsp;&nbsp;&nbsp;circle.rotation = 0 &nbsp; &nbsp; transition.to( circle, { time=5000, rotation=360, onComplete=rotateRect } ) end rotateCircle() &nbsp; &nbsp; &nbsp; end end end &nbsp; &nbsp; circle:addEventListener("touch", circleTouch) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; local function checkForHit(object, from\_x, from\_y, to\_x, to\_y) &nbsp;local hits = physics.rayCast( from\_x, from\_y, to\_x, to\_y ) &nbsp;if hits[1].object == circle then print ("You Win") local text = display.newImage( "button1.png") text.x = W/2 text.y = H/2 localGroup:insert(text) text.scene= "level1" text:addEventListener("touch", changeScene) &nbsp; local textT = display.newText("Next Level", 0, 0, "Arial", 45) textT.x = text.x textT.y = text.y &nbsp; &nbsp; end end &nbsp; &nbsp; &nbsp; &nbsp; Runtime:addEventListener( "enterFrame", function() checkForHit(circle, sX, sY, eX, eY )end &nbsp;) &nbsp; reloadB:addEventListener("touch", changeScene) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return localGroup &nbsp; end &nbsp; &nbsp;

horacebury · September 28, 2013, 1:16pm

I can’t run that code because it isn’t complete - you’ve not posted enough code for me to run.

The first rule of debugging is Boil your code down to just the problem code. That way, you can work on the part which is a problem without interfering with other code and, if you need to, you can post it for other people to debug.

Reduce your code to just the piece which is the problem, then post it.

If I understand your description properly, the ball (with enough friction) would stop spinning when it hits another object, but would bounce off somewhere else. It all depends on your specific body setup.

tramoale.at · September 28, 2013, 1:27pm

And what can i do to solve the problem?

horacebury · September 28, 2013, 3:10pm

Well, I did just tell you to reduce the code down to the only code which has the problem. Until then, I can’t help you!