I need help controling the ball speed?
Posted on Mon, 2012-02-06 18:26
Hey I need help on controlling the ball speed what I'm trying to do is not have the ball speed up or slow down. What I just want it in one speed. My problem is the ball always speeds up and I do not know how to control it.
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 | local ball = display.newImageRect("smile.png", 50 ,50 ) ball.x = -200 ball.y = 200 game:insert( ball ) physics.addBody(ball,{density = 35, bounce = 0.2, friction = 0.5, radius = 20}) -- This is were the ball moves and always speeds up how do I slow down local move = function( event ) ball:applyForce( 125, 2000, ball.x, ball.y ) ball.angularVelocity = 700 end Runtime:addEventListener( "enterFrame", move ) local slows = function( event ) ball:applyForce( -1000, -4000, ball.x, ball.y ) ball.angularVelocity = 0 end slow:addEventListener( "touch", slows ) local move = function( event ) box.x = box.x + 3 camera:update( event ) end Runtime:addEventListener( "enterFrame", move ) local function moveCamera() if (box.x > 90 and box.x < 200000) then game.x = -box.x + 400 end end Runtime:addEventListener( "enterFrame", moveCamera ) local jump = 0 local function onScreenTouch( event ) if event.phase == "began" then jump = jump + 1 if jump < 2 then ball:applyForce( 10, -22000, ball.x, ball.y ) elseif jump == 2 then ball:applyForce( 10, -22000, ball.x, ball.y ) print(jump) end end end buttona:addEventListener( "touch", onScreenTouch ) return localGroup end |
Replies
Posted on Tue, 2012-02-07 02:20
#2
@peach ok the code is reduced can you please check it again
Posted on Tue, 2012-02-07 06:32
#3
@peach what I'm trying do here is keep the ball from one speed not making to fast or slow, but just moving without speeding up or down like a car
Posted on Tue, 2012-02-07 10:03
#4
Ah, I see - you're applying force every frame - that stacks!
Can you use obj:setLinearVelocity() instead? That should fix this.
Posted on Tue, 2012-02-07 13:32
#5
@peach I just tried the your code and still same problem, here I will post the plug and play code so you can see the ball speeding up
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 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local ui = require("ui") require( "camera" ) local loqsprite = require('loq_sprite') physics.start() --physics.setDrawMode("hybrid") local t = {} local baseline = 0 local tree = {} local sky = display.newGroup() local camera = Camera:new() local life = 5 local game = display.newGroup(); game.x = -10 --[[for i = 1, 100, 1 do local back = display.newImage( "layer_back.png" ) back.x = back.contentWidth * i - ( back.contentWidth / 2 ) camera:addObject( back ) local middle = display.newImage( "layer_middle.png" ) middle.x = back.x camera:addObject( middle ) local front = display.newImage( "layer_front.png" ) front.x = back.x camera:addObject( front ) end local width, height = camera:getContentSize() camera:setClampingBounds( 0, 0, width, height ) local onTouch = function( event ) camera:drag( event ) end Runtime:addEventListener( "touch", onTouch )]]-- --[[local baseline = 230 local sky1 = display.newImage ("hill.png") sky1:setReferencePoint(display.CenterLeftReferencePoint) sky1.x = 0 sky1.y = baseline - 10 localGroup:insert(sky1) local baseline3 = 230 local sky3 = display.newImage ("hill2.png") sky3:setReferencePoint(display.CenterLeftReferencePoint) sky3.x = 240 sky3.y = baseline3 - -10 localGroup:insert(sky3) local sky4 = display.newImage ("hill3.png") sky4:setReferencePoint(display.CenterLeftReferencePoint) sky4.x = 500 sky4.y = baseline - -60 localGroup:insert(sky4) local tPrevious = system.getTimer() local function move(event) local tDelta = event.time - tPrevious tPrevious = event.time local xOffset = ( 0.1 * tDelta ) sky1.x = sky1.x - xOffset sky3.x = sky3.x - xOffset sky4.x = sky4.x - xOffset if (sky1.x + sky1.contentWidth) < 0 then sky1:translate( 480 * 2, 0) end if (sky3.x + sky3.contentWidth) < 0 then sky3:translate( 480 * 2, 0) end if (sky4.x + sky4.contentWidth) < 0 then sky4:translate( 480 * 2, 0) end end Runtime:addEventListener( "enterFrame", move )]]-- local box = display.newRect(100, 160, 30, 30) game:insert( box ) local slow = display.newRect(240, 280, 30,30) local buttona = display.newRect( 30, 280, 30 ,30) local road1 = display.newRect( -600, 240, 1000, 10 ) physics.addBody(road1,"static",{density = 0, bounce = 0.1, friction = 0}) road1.name = "road1" game:insert( road1 ) --camera:addObject( road1 ) local road2 = display.newRect(400, 210 ,10, 40) road2.alpha = 1 road2.name = "road1" --camera:addObject( road2 ) local road3 = display.newRect(400, 210, 500, 10 ) physics.addBody(road3,"static",{density = 0, bounce = 0, friction = 0}) road3.name = "road1" game:insert( road3 ) --camera:addObject( road3 ) local road4 = display.newRect(900, 180, 10, 40) physics.addBody(road4,"static",{density = 0, bounce = 0.1, friction = 0}) road4.name = "road1" game:insert( road4 ) --camera:addObject( road4 ) local road5 = display.newRect(900, 180, 500, 10) physics.addBody(road5,"static",{density = 0, bounce = 0.1, friction = 0}) road5.name = "road1" game:insert( road5 ) --camera:addObject( road5 ) local road6 = display.newRect(1400, 150, 10, 40) physics.addBody(road6,"static",{density = 0, bounce = 0.1, friction = 0}) road6.name = "road1" game:insert( road6 ) --camera:addObject( road6 ) local road7 = display.newRect(1400, 150, 500, 10) physics.addBody(road7,"static",{density = 0, bounce = 0.1, friction = 0}) road7.name = "road1" game:insert( road7 ) --camera:addObject( road7 ) local road8 = display.newRect(1900, 90, 10, 70) physics.addBody(road8,"static",{density = 0, bounce = 0.1, friction = 0}) road8.name = "road1" game:insert( road8 ) --camera:addObject( road8 ) local road9 = display.newRect(1900, 90, 100, 10) physics.addBody(road9,"static",{density = 0, bounce = 0.1, friction = 0}) road9.name = "road1" game:insert( road9 ) --camera:addObject( road9 ) local road10 = display.newRect(2000, 90, 10, 70) physics.addBody(road10,"static",{density = 0, bounce = 0.1, friction = 0}) road10.name = "road1" game:insert( road10 ) --camera:addObject( road10 ) local road11 = display.newRect(2000, 150, 100, 10) physics.addBody(road11,"static",{density = 0, bounce = 0.1, friction = 0}) road11.name = "road1" game:insert( road11 ) --camera:addObject( road11 ) local road12 = display.newRect(2100, 150, 10, 70) physics.addBody(road12,"static",{density = 0, bounce = 0.1, friction = 0}) road12.name = "road1" game:insert( road12 ) --camera:addObject( road12 ) local road13 = display.newRect(2100, 220, 500, 10) physics.addBody(road13,"static",{density = 0, bounce = 0.1, friction = 0}) road13.name = "road1" game:insert( road13 ) --camera:addObject( road13 ) local road14 = display.newRect(2600, 220, 10, 40) physics.addBody(road14,"static",{density = 0, bounce = 0.1, friction = 0}) road14.name = "road1" game:insert( road14 ) camera:addObject( road14 ) local road15 = display.newRect(2600, 260, 500, 10) physics.addBody(road15,"static",{density = 0, bounce = 0.1, friction = 0}) road15.name = "road1" game:insert( road15 ) --camera:addObject( road15 ) local road16 = display.newRect(3100, 230, 10, 40) physics.addBody(road16,"static",{density = 0, bounce = 0.1, friction = 0}) road16.name = "road1" game:insert( road16 ) --camera:addObject( road16 ) local road17 = display.newRect(3100, 230, 500, 10) physics.addBody(road17,"static",{density = 0, bounce = 0.1, friction = 0}) road17.name = "road1" game:insert( road17 ) --camera:addObject( road17 ) local road18 = display.newRect(3600,200, 10, 40) physics.addBody(road18,"static",{density = 0, bounce = 0.1, friction = 0}) road18.name = "road1" game:insert( road18 ) --camera:addObject( road18 ) local road19 = display.newRect(3600,200, 400, 10) physics.addBody(road19,"static",{density = 0, bounce = 0.1, friction = 0}) road19.name = "road1" game:insert( road19 ) --camera:addObject( road19 ) local road20 = display.newRect(4000,200, 10, 70) physics.addBody(road20,"static",{density = 0, bounce = 0.1, friction = 0}) road20.name = "road1" game:insert( road20 ) --camera:addObject( road20 ) local road21 = display.newRect(4000,260, 100, 10) physics.addBody(road21,"static",{density = 0, bounce = 0.1, friction = 0}) road21.name = "road1" game:insert( road21 ) --camera:addObject( road21 ) local road22 = display.newRect(4100,200, 10, 70) physics.addBody(road22,"static",{density = 0, bounce = 0.1, friction = 0}) road22.name = "road1" game:insert( road22 ) --camera:addObject( road22 ) local road23 = display.newRect(4100,200, 500, 10) physics.addBody(road23,"static",{density = 0, bounce = 0.1, friction = 0}) road23.name = "road1" game:insert( road23 ) --camera:addObject( road23 ) local road24 = display.newRect(4600,170, 10, 40) physics.addBody(road24,"static",{density = 0, bounce = 0.1, friction = 0}) road24.name = "road1" game:insert( road24 ) --camera:addObject( road24 ) local road255 = display.newRect(4600,170, 300, 10) physics.addBody(road255,"static",{density = 0, bounce = 0.1, friction = 0}) road255.name = "road1" game:insert( road255 ) --camera:addObject( road25 ) local road25 = display.newRect(4900,170, 10, 40) physics.addBody(road25,"static",{density = 0, bounce = 0.1, friction = 0}) road25.name = "road1" game:insert( road25 ) --camera:addObject( road25 ) local road26 = display.newRect(4900,200, 300, 10) physics.addBody(road26,"static",{density = 0, bounce = 0.1, friction = 0}) road26.name = "road1" game:insert( road26 ) --camera:addObject( road26 ) local road27 = display.newRect(5200,200, 10, 70) physics.addBody(road27,"static",{density = 0, bounce = 0.1, friction = 0}) road27.name = "road1" game:insert( road27 ) --camera:addObject( road27 ) local road28 = display.newRect(5200,260, 100, 10) physics.addBody(road28,"static",{density = 0, bounce = 0.1, friction = 0}) road28.name = "road1" game:insert( road28 ) --camera:addObject( road28 ) local road29 = display.newRect(5300,200, 10, 70) physics.addBody(road29,"static",{density = 0, bounce = 0.1, friction = 0}) road29.name = "road1" game:insert( road29 ) --camera:addObject( road29 ) local road30 = display.newRect(5300,200, 200, 10) physics.addBody(road30,"static",{density = 0, bounce = 0.1, friction = 0}) road30.name = "road1" game:insert( road30 ) --camera:addObject( road30 ) local road31 = display.newRect(5500,200, 10, 70) physics.addBody(road31,"static",{density = 0, bounce = 0.1, friction = 0}) road31.name = "road1" game:insert( road31 ) --camera:addObject( road31 ) local road32 = display.newRect(5500,260, 400, 10) physics.addBody(road32,"static",{density = 0, bounce = 0.1, friction = 0}) road32.name = "road1" game:insert( road32 ) --camera:addObject( road32 ) local road33 = display.newRect(5900,200, 10, 70) physics.addBody(road33,"static",{density = 0, bounce = 0.1, friction = 0}) road33.name = "road1" game:insert( road33 ) --camera:addObject( road33 ) local road34 = display.newRect(5900,200, 400, 10) physics.addBody(road34,"static",{density = 0, bounce = 0.1, friction = 0}) road34.name = "road1" game:insert( road34 ) --camera:addObject( road34 ) local road35 = display.newRect(6300,200, 10, 40) physics.addBody(road35,"static",{density = 0, bounce = 0.1, friction = 0}) road35.name = "road1" game:insert( road35 ) --camera:addObject( road35 ) local road36 = display.newRect(6300,230, 500, 10) physics.addBody(road36,"static",{density = 0, bounce = 0.1, friction = 0}) road36.name = "road1" game:insert( road36 ) --camera:addObject( road36 ) local road37 = display.newRect(6800,200, 10, 40) physics.addBody(road37,"static",{density = 0, bounce = 0.1, friction = 0}) road37.name = "road1" game:insert( road37 ) --camera:addObject( road37 ) local road38 = display.newRect(6800,200, 500, 10) physics.addBody(road38,"static",{density = 0, bounce = 0.1, friction = 0}) road38.name = "road1" game:insert( road38 ) --camera:addObject( road38 ) local road39 = display.newRect(7300,170, 10, 40) physics.addBody(road39,"static",{density = 0, bounce = 0.1, friction = 0}) road39.name = "road1" game:insert( road39 ) --camera:addObject( road39 ) local road40 = display.newRect(7300,170, 600, 10) physics.addBody(road40,"static",{density = 0, bounce = 0.1, friction = 0}) road40.name = "road1" game:insert( road40 ) --camera:addObject( road40 ) physics.addBody(road2,"static",{density = 0, bounce = 0.1, friction = 0}) game:insert( road2 ) --camera:addObject( road2 ) ball = display.newCircle(200, 200 ,20 ,20 ) game:insert( ball ) physics.addBody(ball,{density = 30, bounce = 0.2, friction = 0, radius = 19}) local word = display.newText("Right", 30 ,30, "Arial", 30) word.x = 240 word.y = 270 local lifes = display.newText("Life: ",0,0,nil,22) lifes.x = 40 lifes.y = 270 lifes.text = "Life: ".. life local function lost (event) if life == 0 then display.remove(ball) end end Runtime:addEventListener("enterFrame", lost) local move = function( event ) ball:applyForce( 100, 2000, ball.x, ball.y ) ball.angularVelocity = 700 end Runtime:addEventListener( "enterFrame", move ) local slows = function( event ) ball:applyForce( 2000, -22000, ball.x, ball.y ) ball.angularVelocity = 0 end slow:addEventListener( "touch", slows ) local move = function( event ) box.x = box.x + 3 camera:update( event ) end Runtime:addEventListener( "enterFrame", move ) local function moveCamera() if (box.x > 90 and box.x < 200000) then game.x = -box.x + 400 end end Runtime:addEventListener( "enterFrame", moveCamera ) local jump = 0 local function onScreenTouch( event ) if event.phase == "began" then jump = jump + 1 if jump < 2 then ball:applyForce( 10, -22000, ball.x, ball.y ) elseif jump == 2 then ball:applyForce( 10, -22000, ball.x, ball.y ) print(jump) end end end buttona:addEventListener( "touch", onScreenTouch ) local function onCollision4(event) if event.phase == "began" and event.other.name == "road1" then jump = 0 print("works") end end ball.preCollision = onLocalPreCollision ball:addEventListener("collision", onCollision4) --[[ camera:addObject( road1 ) camera:addObject( road2 ) camera:addObject( road3 ) camera:addObject( road4 ) camera:addObject( road5 ) camera:addObject( road6 ) camera:addObject( road7 ) camera:addObject( road8 ) camera:addObject( road9 ) camera:addObject( road10 ) camera:addObject( road11 ) camera:addObject( road12 ) camera:addObject( road13 ) camera:addObject( road14 ) camera:addObject( road15 ) camera:addObject( road16 ) camera:addObject( road17 ) camera:addObject( road18 ) camera:addObject( road19 ) camera:addObject( road20 ) camera:addObject( road21 ) camera:addObject( road22 ) camera:addObject( road23 ) camera:addObject( road24 ) camera:addObject( road25 ) camera:addObject( road26 ) camera:addObject( road27 ) camera:addObject( road28 ) camera:addObject( road29 ) camera:addObject( road30 ) camera:addObject( road31 ) camera:addObject( road32 ) camera:addObject( road33 ) camera:addObject( road34 ) camera:addObject( road35 ) camera:addObject( road36 ) camera:addObject( road37 ) camera:addObject( road38 ) camera:addObject( road39 ) camera:addObject( road40 ) camera:addObject( road255 ) ]]-- return localGroup end |
So this is the code
Posted on Tue, 2012-02-07 23:01
#6
You are still applying force but I did email you in relation to your other thread.
As I said in your other thread this is too much code for me to read - however looking at your ball it is moving once per frame, so depending on FPS it may vary. Check your framerate, if the speed changes when it is fluctuating then that would be why.
Peach :)