下面是lua版本的具体代码
缩放算法大致和http://blog.csdn.net/somestill/article/details/10581277相同,做了一些优化 他的算法有bug
cc.FileUtils:getInstance():addSearchPath(src)
cc.FileUtils:getInstance():addSearchPath(res)
require game.EngineDefault
local _layer = nil;
local _scene = nil;
local _tileMap = nil;
local _grassTileLayer = nil;
local _treeTileLayer = nil;
local _player = nil;
local distance;
local deltaX;
local deltaY;
local mscale = 1;
local firsttouch = true;
--滑动助力
local lastMove = nil;
local DIS_MIN = 5;
local function autoMoveMap()
print(autoMoveMap,lastMove.x,lastMove.y);
if(math.abs(lastMove.x) <= 2 and math.abs(lastMove.y) <= 2)then
local px,py = _tileMap:getPosition();
_tileMap:setPosition(cc.p(px + lastMove.x,py + lastMove.y));
_layer:unscheduleUpdate();
lastMove = nil;
return;
end
local px,py = _tileMap:getPosition();
local moveX = lastMove.x / 1.2;
local moveY = lastMove.y / 1.2;
_tileMap:setPosition(cc.p(px + moveX,py + moveY));
lastMove.x = moveX;
lastMove.y = moveY;
end
local function onTouchBegin(touch,event)
firsttouch = true;
_layer:unscheduleUpdate();
return true;
end
local function onTouchMove(touch,event)
if(#touch == 1)then --single touch
--重置标志位 防止开始用户使用2个手指缩放
--松开一个手指拖动 再用2个手指缩放 不会触发 onTouchBegin 的问题
firsttouch = true;
local d = touch[1]:getDelta();
local scale = _layer:getScale();
--这里要按照缩放比例来决定滑动的距离 不然在scale较小的情况下会出来 滑不动
d = cc.p(d.x /scale ,d.y/ scale);
local px,py = _tileMap:getPosition();
_tileMap:setPosition(cc.p(px + d.x,py + d.y));
lastMove = d;
else --multi touch
lastMove = nil
local p1 = touch[1]:getLocation();
local p2 = touch[2]:getLocation();
local pMid = cc.pMidpoint(p1,p2);
if(firsttouch)then
firsttouch = false;
distance = cc.pGetDistance(p1,p2);
deltaX = pMid.x - _layer:getPositionX();
deltaY = pMid.y - _layer:getPositionY();
return ;
end
local mdistance = cc.pGetDistance(p1,p2);
mscale = mdistance/distance * mscale;
distance = mdistance;
_layer:setScale(mscale);
--这个因子是为了解决这个算法 中点飘得问题 当缩放比例较小时 缩放中心点 会比较怪
local factor = math.min(1,_layer:getScale());
local x = (pMid.x - deltaX) * factor;
local y = (pMid.y - deltaY) * factor;
_layer:setPosition(cc.p(x,y));
deltaX = pMid.x - _layer:getPositionX();
deltaY = pMid.y - _layer:getPositionY();
end
--
end
local function onTouchEnd(touch,event)
if(#touch == 1)then --single touch
if(lastMove)then
--lastMove = cc.pMul(lastMove,5);
if(math.abs(lastMove.x) <= DIS_MIN and math.abs(lastMove.y) <= DIS_MIN)then
return;
end
_layer:scheduleUpdate(autoMoveMap);
else
return;
end
else --multi touch
end
end
local function loadTileMap()
_tileMap = ccexp.TMXTiledMap:create(map.tmx);
_treeTileLayer = _tileMap:getLayer(trees);
_grassTileLayer = _tileMap:getLayer(grass);
_tileMap:setScale(2);
return _tileMap;
end
local function createLayer()
_layer = cc.Layer:create();
_layer:addChild(loadTileMap());
_layer:setTouchEnabled(true);
local listener = cc.EventListenerTouchAllAtOnce:create();
listener:registerScriptHandler(onTouchBegin,cc.Handler.EVENT_TOUCHES_BEGAN);
listener:registerScriptHandler(onTouchMove,cc.Handler.EVENT_TOUCHES_MOVED);
listener:registerScriptHandler(onTouchEnd,cc.Handler.EVENT_TOUCHES_ENDED);
_layer:getEventDispatcher():addEventListenerWithSceneGraphPriority(listener,_layer);
return _layer;
end
local function createScene()
_scene = cc.Scene:create();
_scene:addChild(createLayer());
return _scene;
end
local function main()
cc.Director:getInstance():runWithScene(createScene());
end
xpcall(main, __G__TRACKBACK__)
