Output of vertex shader 'colorVarying' not read by fragment shader

Output of vertex shader 'colorVarying' not read by fragment shader

References

Reference NO 1

http://stackoverflow.com/questions/13657076/output-of-vertex-shader-colorvarying-not-read-by-fragment-shader

Reference NO 2

http://stackoverflow.com/tags/fragment-shader/hot

Reference NO 3

http://www.arcsynthesis.org/gltut/Illumination/Tut10%20Fragment%20Lighting.html

Reference NO 4

http://www.opengl.org/discussion_boards/showthread.php/171965-Problem-with-shader-tutorial

Reference NO 5

http://www.rozengain.com/blog/2010/08/10/using-webgl-glsl-shaders-to-create-a-tunnel-effect/

Reference NO 6

http://atduskgreg.github.io/Processing-Shader-Examples/

Reference NO 7

http://csc.lsu.edu/~kooima/csc4356/notes/icg-pipeline-3.pdf

Reference NO 8

#EANF#