iphone opengl es draw scratch effect

Line
....\.DS_Store
__MACOSX
........\Line
........\....\._.DS_Store
Line\build
....\.....\Debug-iphoneos
....\.....\..............\Line.app
....\.....\..............\........\_CodeSignature
....\.....\..............\........\..............\CodeResources
....\.....\..............\........\CodeResources
....\.....\..............\........\embedded.mobileprovision
....\.....\..............\........\Info.plist
....\.....\..............\........\Line
....\.....\..............\........\LineViewController.nib
....\.....\..............\........\MainWindow.nib
....\.....\..............\........\PkgInfo
....\.....\..............\........\ResourceRules.plist
....\.....\..............\........\Shader.fsh
....\.....\..............\........\Shader.vsh
__MACOSX\Line\build
........\....\.....\Debug-iphoneos
........\....\.....\..............\._Line.app
Line\build\Debug-iphoneos\Line.app.dSYM
....\.....\..............\.............\Contents
....\.....\..............\.............\........\Info.plist
....\.....\..............\.............\........\Resources
....\.....\..............\.............\........\.........\DWARF
....\.....\..............\.............\........\.........\.....\Line
....\.....\Debug-iphonesimulator
....\.....\.....................\Line.app
....\.....\.....................\........\Info.plist
....\.....\.....................\........\Line
....\.....\.....................\........\LineViewController.nib
....\.....\.....................\........\MainWindow.nib
....\.....\.....................\........\PkgInfo
....\.....\.....................\........\Shader.fsh
....\.....\.....................\........\Shader.vsh
....\.....\.....................\Line.app.dSYM
....\.....\.....................\.............\Contents
....\.....\.....................\.............\........\Info.plist
....\.....\.....................\.............\........\Resources
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....\.....\.....................\.............\........\.........\.....\Line
....\.....\Line.build
....\.....\..........\Debug
....\.....\..........\.....\Line.build
....\.....\..........\.....\..........\build-state.dat
....\.....\..........\.....\..........\build-state~.dat
....\.....\..........\.....\..........\Line.dep
....\.....\..........\.....\..........\Line~.dep
....\.....\..........\Debug-iphoneos
....\.....\..........\..............\Line.build
....\.....\..........\..............\..........\build-state.dat
....\.....\..........\..............\..........\build-state~.dat
....\.....\..........\..............\..........\Line-all-target-headers.hmap
....\.....\..........\..............\..........\Line-generated-files.hmap
....\.....\..........\..............\..........\Line-own-target-headers.hmap
....\.....\..........\..............\..........\Line-project-headers.hmap
....\.....\..........\..............\..........\Line.dep
....\.....\..........\..............\..........\Line.hmap
....\.....\..........\..............\..........\Line.xcent
....\.....\..........\..............\..........\Line~.dep
....\.....\..........\..............\..........\Objects-normal
....\.....\..........\..............\..........\..............\armv6
....\.....\..........\..............\..........\..............\.....\CGPointExtension.o
....\.....\..........\..............\..........\..............\.....\EAGLView.o
....\.....\..........\..............\..........\..............\.....\Line
....\.....\..........\..............\..........\..............\.....\Line.LinkFileList
....\.....\..........\..............\..........\..............\.....\LineAppDelegate.o
....\.....\..........\..............\..........\..............\.....\LineViewController.o
....\.....\..........\..............\..........\..............\.....\main.o
....\.....\..........\..............\..........\..............\armv7
....\.....\..........\..............\..........\..............\.....\CGPointExtension.o
....\.....\..........\..............\..........\..............\.....\EAGLView.o
....\.....\..........\..............\..........\..............\.....\L

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