How to throw and NOT drag

Solar2D General Questions/Discussion
#1

Ok so this code makes the object Drag-able AND throw-able… i want it to just be throw-able… like when the player grabs the object they cant drag but if they swipe the object fly’s 

function dragBody( event, params ) local body = event.target local phase = event.phase local stage = display.getCurrentStage() if "began" == phase then stage:setFocus( body, event.id ) body.isFocus = true if params and params.center then body.tempJoint = physics.newJoint( "touch", body, body.x, body.y ) else body.tempJoint = physics.newJoint( "touch", body, event.x, event.y ) end if params then local maxForce, frequency, dampingRatio if params.maxForce then body.tempJoint.maxForce = params.maxForce end if params.frequency then body.tempJoint.frequency = params.frequency end if params.dampingRatio then body.tempJoint.dampingRatio = params.dampingRatio end end elseif body.isFocus then if "moved" == phase then body.tempJoint:setTarget( event.x, event.y ) elseif "ended" == phase or "cancelled" == phase then stage:setFocus( body, nil ) body.isFocus = false body.tempJoint:removeSelf() end end return true end player:addEventListener( "touch", dragBody)
#2

See this thread:

https://forums.coronalabs.com/topic/57339-swipe-to-throw-object-without-dragging/

#3

tried it… doesnt work… like it moves a little but but it feels so laggy and it doesnt fling it… and it drags…

#4

The theory is all there. You just need to experiment with the code to get it to do what you want. 

fe:

centerX = display.contentCenterX centerY = display.contentCenterY screenTop = math.floor(display.screenOriginY) screenLeft = math.floor(display.screenOriginX) screenBottom = display.contentHeight - screenTop screenRight = display.contentWidth - screenLeft screenWidth = screenRight - screenLeft screenHeight = screenBottom - screenTop local physics = require("physics") physics.start() local leftWall = display.newRect(screenLeft - 10, centerY, 20, screenHeight) local rightWall = display.newRect(screenRight + 10, centerY, 20, screenHeight) local topWall = display.newRect(centerX, screenTop - 10, screenWidth, 20) local bottomWall = display.newRect(centerX, screenBottom + 10, screenWidth, 20) physics.addBody(leftWall, "static") physics.addBody(rightWall, "static") physics.addBody(topWall, "static") physics.addBody(bottomWall, "static") local square = display.newRect(centerX, centerY, screenWidth\*.075, screenWidth\*.075) physics.addBody(square) square.gravityScale = 0 local function touchListener(event) local phase=event.phase if phase == "began" then square:setLinearVelocity(0,0) elseif phase == "moved" then print("event.x = "..event.x) print("event.y = "..event.y) elseif phase == "cancelled" or phase == "ended" then local eventXMove = (event.xStart - event.x)\*-1 local eventYMove = (event.yStart - event.y)\*-1 print("0--------------------------") print("eventXMove = "..eventXMove) print("eventYMove = "..eventYMove) local vx, vy = square:getLinearVelocity() square:setLinearVelocity(eventXMove, eventYMove) end end Runtime:addEventListener("touch", touchListener)
#5

See this thread:

https://forums.coronalabs.com/topic/57339-swipe-to-throw-object-without-dragging/

#6

tried it… doesnt work… like it moves a little but but it feels so laggy and it doesnt fling it… and it drags…

#7

The theory is all there. You just need to experiment with the code to get it to do what you want. 

fe:

centerX = display.contentCenterX centerY = display.contentCenterY screenTop = math.floor(display.screenOriginY) screenLeft = math.floor(display.screenOriginX) screenBottom = display.contentHeight - screenTop screenRight = display.contentWidth - screenLeft screenWidth = screenRight - screenLeft screenHeight = screenBottom - screenTop local physics = require("physics") physics.start() local leftWall = display.newRect(screenLeft - 10, centerY, 20, screenHeight) local rightWall = display.newRect(screenRight + 10, centerY, 20, screenHeight) local topWall = display.newRect(centerX, screenTop - 10, screenWidth, 20) local bottomWall = display.newRect(centerX, screenBottom + 10, screenWidth, 20) physics.addBody(leftWall, "static") physics.addBody(rightWall, "static") physics.addBody(topWall, "static") physics.addBody(bottomWall, "static") local square = display.newRect(centerX, centerY, screenWidth\*.075, screenWidth\*.075) physics.addBody(square) square.gravityScale = 0 local function touchListener(event) local phase=event.phase if phase == "began" then square:setLinearVelocity(0,0) elseif phase == "moved" then print("event.x = "..event.x) print("event.y = "..event.y) elseif phase == "cancelled" or phase == "ended" then local eventXMove = (event.xStart - event.x)\*-1 local eventYMove = (event.yStart - event.y)\*-1 print("0--------------------------") print("eventXMove = "..eventXMove) print("eventYMove = "..eventYMove) local vx, vy = square:getLinearVelocity() square:setLinearVelocity(eventXMove, eventYMove) end end Runtime:addEventListener("touch", touchListener)