I displyed the 3D object by joining large number of triangles in a window.Three vertices of each triangles are storied in a linked list.In the Display function ,reads the triangle list and display the object. I want to give the smooth shade model to the displayed object.
I read about Gouraud and Phong shading for that.gl functions (glNormal(),glPolygonMode(),glShadeModel(),etc…)is not sufficient for implementing smooth shading?
I’m not sure that I’m understanding quite what your question is - are you having problems getting smooth-shading in GL, or are you asking if GL can do it?
I’ll start with the second - Yes, GL can do it, and quite well (IMHO).
Second, you will probably need to do some averaging of your vertex normals - search this forum for discussions of it - I’m sure there are about 8 million posts! Then, if you’ve got everything set up correctly, you should have a very nice looking smooth surface.
Finally, I’ll second the above remark about linked lists - unless you absolutely need them, they tend to use way too much memory and be way too slow for graphics applications.