Hi guys,
I have been racking my brain on this issue.. and can't seem to fix it... it might be something small that I am just missing..
basically what I need is a thin rectangle that is suspended from the celling to be able to move when the user touches the screen (I have done this.. easy) but what I also need is a square to be attached to the bottom of the rectangle. When the physics kicks in they move differently.. I need the square to be attached to the rectangle so that it just moved with the rectangle..
I tried using the weld join but no good.. I think its to do with my reference point in the rectangle. but if I change that then the two items are stuck together but I can't swing properly from the celling...
code below
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 | local physics = require "physics" physics.start( true ) physics.setDrawMode("normal") -- set to "debug" or "hybrid" to see collision boundaries physics.setDrawMode("hybrid") physics.setGravity( 0, 9.8 ) --> 0, 9.8 = Earth-like gravity local cel = display.newRect(0, 0, display.contentWidth, 100) physics.addBody(cel, "static" ) local line = display.newRect(200, 100, 10, 600) local square = display.newRect(line.x - 50 , line.y+200 , 100, 100) function movement(event) line:applyLinearImpulse( 1, 0, line.x, line.y ) end physics.addBody(line, "dynamic", {shape=unit} ) physics.addBody(square, "dynamic" ) line:setReferencePoint( display.TopCenterReferencePoint ) local joint = physics.newJoint( "pivot", cel, line, line.x, line.y - 20 ) local joint1 = physics.newJoint( "weld", square, line, 200, 600 ) Runtime:addEventListener( "touch", movement ) |
views:1655 update：2011/12/29 9:44:01