Integrate with object loader
Rewrote GraphicObject
add get length function
remove useless files
added a print function
Display the cube
prepare to make a camera
Added camera
Added Camera for test, drew the normal
display normal
add face normal function
add face number function
Finished hollywood lighting
finished the display
Frag shader support multiple source
Add attenuation processing for light
Finished Phong Shader
Added normalized blinn phong shader
modify .gitignore to ignore useless files
tuned the shininess and lightsource