Asg 5: Turn on OpenGL lighting

Objectives

• intialize and enable lighting (in gldraw.py:init())
• provide the face normal to OpenGL when drawing (in aw.py:draw())

Assignment

1. In gldraw.py:init(), enable shading via

         glShadeModel(GL_FLAT)
   	

2. In gldraw.py:init(), set up some lights using this pattern

         glLightfv(GL_LIGHT0, GL_POSITION, light0_pos)
         glLightfv(GL_LIGHT0, GL_DIFFUSE, light0_col)
   	

   where light0_pos and light0_col are the light position and color, respectively, e.g.,

         light0_pos = [-50.0, 0.0, 0.0, 0.0]
         light0_col = [  0.1, 0.1, 0.7, 0.25]
   	

3. In gldraw.py:init(), turn on lighting

         glEnable(GL_LIGHT0)
         glEnable(GL_LIGHTING)
   	

4. In aw.py:draw(), provide the face normal to OpenGL when drawing

         glNormal3f(self.normals[f][0],
                    self.normals[f][1],
                    self.normals[f][2])
         glBegin(GL_POLYGON)
         for vin in xrange(len(face)):
           glVertex3f(self.points[face[vin]-1][0],
                      self.points[face[vin]-1][1],
                      self.points[face[vin]-1][2])
         glEnd()
   	

Details

1. There is no computation to be done in this assignment per se, lighting is computed by OpenGL.

Requirements

1. Use the cube-ccw.obj to read in and test with (include it in your assignment).
2. If you want to render some of the other Alias|Wavefront objects, you may need to reverse the orientation of the normals via

         n = np.cross(B,A)
   	

   instead of

         n = np.cross(A,B)
   	

Turn in

1. A README file containing
   1. Course id--section no
   2. Name
   3. Brief solution description (e.g., program design, description of algorithm, etc., however appropriate).
   4. Lessons learned, identified interesting features of your program
   5. Any special usage instructions
2. source code (.py source)

How to hand in

Grading scheme