Color-Material Mode

Example:

    glEnable(GL_COLOR_MATERIAL)
    glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE)
    ...
    glColor3f(r1,g1,b1)
    glVertex3f(x1,y1,z1)
    glColor3f(r2,g2,b2)
    glVertex3f(x2,y2,z2)
    glColor3f(r3,g3,b3)
    glVertex3f(x3,y3,z3)
    ...