170       glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);  in gear()
171       glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);  in gear()
173          glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);  in gear()
174          glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),  in gear()
185       glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);  in gear()
186       glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);  in gear()
187       glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),  in gear()
189       glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),  in gear()
202       glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);  in gear()
203       glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);  in gear()
205          glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),  in gear()
207          glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);  in gear()
218       glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),  in gear()
220       glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),  in gear()
222       glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);  in gear()
223       glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);  in gear()
234       glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);  in gear()
235       glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);  in gear()
237       v = r2 * sin(angle + da) - r1 * sin(angle);  in gear()
242       glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);  in gear()
243       glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);  in gear()
244       glNormal3f(cos(angle + 1.5 * da), sin(angle + 1.5 * da), 0.0);  in gear()
245       glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),  in gear()
247       glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da),  in gear()
250       v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);  in gear()
252       glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),  in gear()
254       glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da),  in gear()
256       glNormal3f(cos(angle + 3.5 * da), sin(angle + 3.5 * da), 0.0);  in gear()
261    glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);  in gear()
262    glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);  in gear()
272       glNormal3f(-cos(angle), -sin(angle), 0.0);  in gear()
273       glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);  in gear()
274       glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);  in gear()