fix vertex UVW reading, W discard
fix vertex UVW reading, W discard

yylangchen/EarthWarrior3D,AnySDK/EarthWarrior3D,yylangchen/EarthWarrior3D,yylangchen/EarthWarrior3D,yylangchen/EarthWarrior3D,AnySDK/EarthWarrior3D,AnySDK/EarthWarrior3D,yylangchen/EarthWarrior3D,AnySDK/EarthWarrior3D,AnySDK/EarthWarrior3D