So i'm trying to create 8 nasty tentacles for my monster and having a fair bit of trouble doing so. I gather box2D doesn't do ropes very well?? I'm new to tables and loops but learning a lot fast. I've hacked over some code from the bridge example and got 8 arms, made up of 16 segments. The segments still like to spin around a bit and that is something I'd like to get under control. Also I would like to have each arm react to a small applyForce on a timer to make them seem a bit more life like. I can do this if I make one but I am having trouble doing it for individual ones created in my loop. Check it out. Any suggestions guys?? I'm thinking that I can also constrain the pivot rotation.
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 | tentacle = {} tentacleJoint = {} tentacleCollisionFilter = { groupIndex = -2 } playerXJoint = player.x + 25 for i = 1,8 do for j = 1,16 do tentacle[j] = display.newImage( "tentacle.png" ) tentacle[j].x = playerXJoint + (j*4) tentacle[j].y = player.y + (i - 5) tentacle[j].rotation = 100 tentacle[j].angularDamping = 1000 physics.addBody( tentacle[j], { density=3, friction=1, bounce=0.3, filter = tentacleCollisionFilter } ) if (j > 1) then prevLink = tentacle[j - 1] else prevLink = player end nextLink = tentacle[j] tentacleJoint[j] = physics.newJoint( "pivot", prevLink, nextLink, playerXJoint + (j*4), player.y + (i - 5) ) end tentacle[10]:applyForce(1, -1) end |
Ok, I have made quite a bit of progress. The only thing that is holding me back now is the elasticity of the arms/tentacles.
They are too stretchy. So when the monster moves, it's arms stretch half way across the screen before catching up.
Does anyone know a way to make the joints 'weld' better; or make the arms less stretchy.
Much Appreciated
Here is my new code
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 87 88 89 90 91 92 93 94 95 96 97 98 99 100 | tentacle = {} longTentacle = {} sucker = {} suckerJoint = {} tentacleJoint = {} longTentacleJoint = {} tentacleCollisionFilter = { groupIndex = -2 } playerX = player.x + 20 playerXJoint = player.x + 17 for i = 1,8 do for j = 1,16 do tentacle[j] = display.newImage( "tentacle.png" ) tentacle[j].x = playerX + (j*4) tentacle[j].y = player.y + (i - 7) tentacle[j].rotation = 100 tentacle[j].angularDamping = 1000 physics.addBody( tentacle[j], { density=3, friction=1, bounce=0.3, filter = tentacleCollisionFilter } ) if (j > 1) then prevLink = tentacle[j - 1] else prevLink = player end nextLink = tentacle[j] tentacleJoint[j] = physics.newJoint( "pivot", prevLink, nextLink, playerXJoint + (j*4), player.y + (i - 7) ) tentacleJoint[j].isLimitEnabled = true tentacleJoint[j]:setRotationLimits( -10, 10 ) end tentacle[4]:applyForce(1,1) tentacle[8]:applyForce(-1,-1) end for i = 1,2 do for h = 1,25 do longTentacle[h] = display.newImage( "tentacle.png" ) longTentacle[h].x = playerX + (h*4) longTentacle[h].y = player.y + (i - 7) longTentacle[h].rotation = 100 longTentacle[h].angularDamping = 1000 physics.addBody( longTentacle[h], { density=3, friction=1, bounce=0.3, filter = tentacleCollisionFilter } ) if (h > 1) then prevLink = longTentacle[h - 1] else prevLink = player end nextLink = longTentacle[h] longTentacleJoint[h] = physics.newJoint( "pivot", prevLink, nextLink, playerXJoint + (h*4), player.y + (i - 7) ) longTentacleJoint[h].isLimitEnabled = true longTentacleJoint[h]:setRotationLimits( -10, 10 ) end suckerJointX = player.x suckerJointY = player.y - 5 for s = 1,2 do sucker[s] = display.newImage( "sucker.png") sucker[s].x = suckerJointX + 125 sucker[s].y = suckerJointY --sucker[s].rotation = 100 sucker[s].angularDamping = 1000 physics.addBody( sucker[s], { density=3, friction=1, bounce=0.3, filter = tentacleCollisionFilter } ) suckerJoint[s] = physics.newJoint( "pivot", longTentacle[25], sucker[s], suckerJointX + 122, suckerJointY ) suckerJoint[s].isLimitEnabled = true suckerJoint[s]:setRotationLimits( -10, 10 ) end longTentacle[4]:applyForce(1,1) longTentacle[8]:applyForce(-1,0) end |
views:1430 update：2011/10/15 21:01:16