Hi, has anyone run into a workaround for this issue? I've submitted an offcial bug report but thought I'd throw it out there in case others have had the same problem.
The problem occurs when you:
1. Make two physics bodies and connect them via pivot joints (haven't tried all joint types)
2. Add them to a display group.
3. Move the X,Y coords of the display group ( helps visually to turn on 'physics.setDrawMode( "hybrid" ) ')
The joints do not move relative to the physics bodies and seem to be locked down to the original 0,0 display coords!
Example code follows, thanks! To see it work properly comment out this line:
transition.to( world, { time=2000, y=ragdoll.y-200, transition=easing.inOutExpo } )
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 | --> Setup Display display.setStatusBar (display.HiddenStatusBar) system.activate ("multitouch") local gameUI = require("gameUI") --> Start Physics local physics = require ("physics") physics.start () physics.setGravity (0, 10) physics.setDrawMode ("hybrid") local world = display.newGroup() -- Make walls local walls = display.newGroup() local leftWall = display.newRect (0, 0, 1, display.contentHeight) local rightWall = display.newRect (display.contentWidth, 0, 1, display.contentHeight) local ceiling = display.newRect (0, 0, display.contentWidth, 1) local floor = display.newRect (0, display.contentHeight, display.contentWidth, 1) physics.addBody (leftWall, "static", {bounce = 0.0, friction = 10}) physics.addBody (rightWall, "static", {bounce = 0.0, friction = 10}) physics.addBody (ceiling, "static", {bounce = 0.0, friction = 10}) physics.addBody (floor, "static", {bounce = 0.0, friction = 10}) walls:insert(leftWall) walls:insert(rightWall) walls:insert(ceiling) walls:insert(floor) -- Make our bodies local originX = 100 local originY = 200 local ragdoll = display.newGroup () local head = display.newCircle( 0, 0, 8 ) head.x = originX head.y = originY head:setFillColor (255, 255, 255, 128) ragdoll:insert (head) local torso = display.newCircle( 0, 0, 15 ) torso.x = originX torso.y = head.y + head.height torso:setFillColor (255, 255, 255, 128) ragdoll:insert (torso) physics.addBody (head, {bounce = 0.0, friction = 1.0}) physics.addBody (torso, {bounce = 0.0, friction = 1.0}) function ragdoll:addFrictionJoint(a, b, posX, posY, rFrom, rTo, mT) local j = physics.newJoint ("pivot", a, b, posX, posY, rFrom, rTo) j.isLimitEnabled = true j:setRotationLimits (rFrom, rTo) j.isMotorEnabled = true j.motorSpeed = 0 j.maxMotorTorque = mT or .05 return j end -- head ragdoll:addFrictionJoint(head, torso, torso.x, torso.y, -2, 2, 0.1) -- torso --ragdoll:addFrictionJoint(torso, head, head.x, torso.y-5, -4, 4, 0.5) function ragdoll:touch( event ) gameUI.dragBody( event ) end head:addEventListener ( "touch", ragdoll ) torso:addEventListener ( "touch", ragdoll ) world:insert(walls) world:insert(ragdoll) transition.to( world, { time=2000, y=ragdoll.y-200, transition=easing.inOutExpo } ) |
views:1643 update：2011/10/11 22:13:38