15-462 Lecture 8: Shading in OpenGL

02/06/2003

15-462 Graphics I

28

Sphere Normals

•Set up instead to use normals of sphere

•Unit sphere normal is exactly sphere point

glBegin(GL_TRIANGLES);

for (i = 0; i < 20; i++) {

glNormal3fv(&vdata[tindices[i][0]][0]);

glVertex3fv(&vdata[tindices[i][0]][0]);

glNormal3fv(&vdata[tindices[i][1]][0]);

glVertex3fv(&vdata[tindices[i][1]][0]);

glNormal3fv(&vdata[tindices[i][2]][0]);

glVertex3fv(&vdata[tindices[i][2]][0]);

}

glEnd();