快跑之引擎詳解

37、快跑之引擎詳一、SpritevarvarfunctionMyGameState()this.setup=function(){palyer=newjaws.Sprite({image:"images/plane.png",x:10,y:10,scale:4,}this.update=function(){}//update調(diào)用之后，將所有需要繪制的代碼this.draw=function()}}jaws.onload=function(){}alpha：，0全透明，1不透明，通常設(shè)置0到1之間的anchor：在繪制精靈時(shí)的位置angle：度數(shù)，0-360image：x:X軸位置y:Ymove(x,y)Xx值，在Y軸上移動(dòng)y值moveTo(xy)：在X軸上移動(dòng)到xY軸上移動(dòng)到y(tǒng)值resize(width,height)widthsetImage(value)：設(shè)置為指定的varplayer;functionMyGameState()this.setup=function(){player=newjaws.Sprite({image:"images/plane.png",x:100,y:100,scale:1,anchor:"top_left"});varplayersheet=newjaws.SpriteSheet({image:"images/droid_11x15.png",frame_size:[11,15]});}this.update=function(){}//update調(diào)用之后，將所有需要繪制的代碼this.draw=function()}}}jaws.onload=}提示UncaughtTypeError:Cannotreadproperty'width'of該錯(cuò)誤是由于在使用精靈圖標(biāo)時(shí)，沒(méi)有預(yù)先加載，導(dǎo)致獲取不到的寬度，從而提示錯(cuò)誤三、Animationvarplayer;varvarfunctionMyGameState()this.setup=function(){player=newjaws.Sprite({x:100,y:100,scale:4,anchor:varplayersheet=newjaws.SpriteSheet({image:"images/droid_11x15.png",frame_size:[11,15]});anim=jaws.Animation({frames:playersheet.frames,frame_duration:150});sliceImage=anim.slice(0,5);}this.update=function(){}//update調(diào)用之后，將所有需要繪制的代碼this.draw=function()}}jaws.onload=}四、 ist精靈列enemies=newjaws.Sprienemies.push(newjaws.Sprite{image:"enemy.png",x:100,y:100})functionisOutsideCanvas(item){return(item.x<0||item.y<0||item.x>jaws.width||item.y>jaws.height)}vartile_map=newTileMap({size:[10,10],cell_size:[16,16]})varsprit