01/30/2003
15-462 Graphics I
25
Hierarchical Tree Traversal
•Order
not necessarily fixed
•Example:
void drawFigure()
{
glPushMatrix(); /* save */
drawTorso();
glTranslatef(...); /* move head */
glRotatef(...); /* rotate
head */
drawHead();
glPopMatrix(); /* restore
*/
glPushMatrix();
glTranslatef(...);
glRotatef(...);
drawUpperArm();
glTranslatef(...)
glRotatef(...)
drawLowerArm();
glPopMatrix();
... }