新冠病毒对物理学的限制

2017-1-6 13:24:56
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我该如何使游戏角色的物理动作仅限于左右倾斜？以下是我声明角色的方式：

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

ms_throw.png 是一张站立的人的图像…因此，收集器将左右移动（使用加速计），我需要演员在移动时只倾斜一点…也就是说，我不希望当我倾斜手机时它翻转。我怎样才能实现这一点？

原文链接 https://stackoverflow.com/questions/9597994

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stackoverflow用户909233
stackoverflow用户909233

关键是调整applyForce(forcex,forcey,coordinatex,coordinatey)的coordinatey。

如果存在显著的摩擦力，物体将倾斜。

为了限制倾斜角度，请使用盒子来盛放它。

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)
        -- 根据加速器的值移动我们的收集器
    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)
2012-03-12 01:53:23

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stackoverflow用户301584

stackoverflow用户301584
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