电晕套物理限制

Question

我该如何让我的游戏角色的物理特性仅限于左右倾斜？以下是我宣布我的性格

collector = display.newImage ("ms_throw.png") 
collector.x = 10 
collector.y = 10 
physics.addBody(collector, {friction = 1.0, bounce = 0.6}) 

ms_throw.png是一个人站在图像......所以基本上器会左右移动（使用加速度计），我需要演员时，他只倾斜了一下移动..意味着当我倾斜手机时，我不希望它颠倒。我如何实现这一目标？

Answer 1

诀窍是调整applyForce(forcex,forcey,coordinatex,coordinatey)的coordinatey。

如果有明显的摩擦，物体会倾斜。
要限制倾斜角度，请使用一个箱子将其笼住。

local physics = require("physics") 
physics.start() 
physics.setGravity(0,10) 

centerx = display.viewableContentWidth/2+(display.contentWidth-display.viewableContentWidth)/2 
centery = display.viewableContentHeight/2+(display.contentHeight-display.viewableContentHeight)/2 

borderx = (display.contentWidth-display.viewableContentWidth)/2 
bordery = (display.contentHeight-display.viewableContentHeight)/2 
local w = display.viewableContentWidth/2 
local h = 100/2 
local allowanceHeight = 15 

local collectorLimiter = {} 
--cannot do in createScene because need to do together with physics 
local ix,iy = centerx,bordery+display.viewableContentHeight-60 
collectorLimiter[1] = display.newRect(0,0,display.viewableContentWidth,4) 
collectorLimiter[1].x,collectorLimiter[1].y = ix,iy-h-allowanceHeight 
collectorLimiter[2] = display.newRect(0,0,display.viewableContentWidth,4) 
collectorLimiter[2].x,collectorLimiter[2].y = ix,iy+h 
collectorLimiter[3] = display.newRect(0,0,4,h*2+allowanceHeight) 
collectorLimiter[3].x,collectorLimiter[3].y = ix-w,iy 
collectorLimiter[4] = display.newRect(0,0,4,h*2+allowanceHeight) 
collectorLimiter[4].x,collectorLimiter[4].y = ix+w,iy 

for i = 1,#collectorLimiter do 
    --collectorLimiter[i].isVisible = false 
end 

physics.addBody(collectorLimiter[1],"static", {friction = 0.3,bounce = 0, filter = {categoryBits = 4,maskBits = 6} }) 
physics.addBody(collectorLimiter[2],"static", {friction = 0.3,bounce = 0, filter = {categoryBits = 4,maskBits = 6} }) 
physics.addBody(collectorLimiter[3],"static", {friction = 0.3,bounce = 0, filter = {categoryBits = 4,maskBits = 6} }) 
physics.addBody(collectorLimiter[4],"static", {friction = 0.3,bounce = 0, filter = {categoryBits = 4,maskBits = 6} }) 

local collector = display.newRect(0,0,80,100) 
collector.x,collector.y = centerx,centery+480 

physics.addBody(collector, {friction = 0.3, density = 0.2, bounce = 0, filter = {categoryBits = 2}}) 

local function OnTouch(event) 
     -- Move our collector based on the accelerator values 
    if event.phase == "began" then 
     collector.ix,collector.iy = event.x,event.y 
    elseif event.phase == "moved" then 
     if collector.ix and collector.iy then 
      local dx = (event.x-collector.ix)*0.4 
      collector:applyForce(dx,0,collector.x,collector.y-10) 
      collector.ix,collector.iy = collector.x,collector.y 
     end 
    elseif event.phase == "ended" or event.phase == "cancelled" then 
     collector.ix,collector.iy = nil,nil 
    end 
end 

Runtime:addEventListener("touch",OnTouch)