Transcript Animation of the Human Heart

Animation of the Human Heart
Center for Computational Visualization
Institute of Computational and Engineering Sciences
Department of Computer Sciences
University of Texas at Austin
August 2004
Structure of the Heart
 Chambers of the heart
 The Atrium
 Upper two chambers
 Divided into the left Atria an the Right Atria
 Brings in Blood from the Veins
 The Ventricles
 Lower two chambers
 Divided into left ventricle and right ventricle
 Pumps in blood into the arteries
Center for Computational Visualization
Institute of Computational and Engineering Sciences
Department of Computer Sciences
University of Texas at Austin
August 2004
Structure (Contd…)
 Valves of the Heart
 AtrioVentricular valves
 Lie between the atrium and the ventricles
 Semilunar valves
 Lie between the ventricles and the arteries
Center for Computational Visualization
Institute of Computational and Engineering Sciences
Department of Computer Sciences
University of Texas at Austin
August 2004
Functioning of the heart
 Left hand side of the heart brings in oxygen rich blood, red color in the
animation
 Right hand side of the heart brings in oxygen deficient blood, blue in color in the
animation
 Cardiac cycle
 Two Phases :
 Diastole Phase
o Both atria and the ventricles are relaxed
 Systole Phase
o Chambers contract to push blood
 The heart beat cycle
 Atrium brings in blood from the veins and expands to fill it up
 Atrium then contracts and pushes blood into the ventricles, Ventricles expand
 The atrioventricular valves close in order to prevent backward flow of blood
 Ventricles contract and push in blood into the arteries
 The semilunar valves close in order to prevent the backward flow of blood
 Cycle repeats
Center for Computational Visualization
Institute of Computational and Engineering Sciences
Department of Computer Sciences
University of Texas at Austin
August 2004
Animating the heart
 Software used was Maya
 Rigged simulation
 The Chambers expanding and Contracting
 Three snapshots of the heart were created using polygon deformers with simple
push, pull and smooth operators
 Atrium Expanded
 Atrium Contracted and Ventricles expanded
 Ventricles contracted
 Original mesh in made to blend into these shapes using blend deformer tool
 The heart alternates between these three cycles followed by a small amount of
rest time and then repeats
Center for Computational Visualization
Institute of Computational and Engineering Sciences
Department of Computer Sciences
University of Texas at Austin
August 2004
Animating the heart (Contd…)
 The blood flow
 Blood is made up of tiny particles made to flow along curves inside the
heart
 Each emitter emit 15,000 particles per second, 7 such emitters
 Bump shaded texture to each particle to give the blood effect
 The pulsating effect is achieved throughout turning the emitters on and
off at regular intervals
 Valves opening
 Made to rotate along its pivot
 Used polygon deformers and blend shapes to show their movement
Center for Computational Visualization
Institute of Computational and Engineering Sciences
Department of Computer Sciences
University of Texas at Austin
August 2004
Pictures
Atrium Expanded
Center for Computational Visualization
Institute of Computational and Engineering Sciences
Department of Computer Sciences
University of Texas at Austin
August 2004
Pictures (Contd…)
Valve Opening
Center for Computational Visualization
Institute of Computational and Engineering Sciences
Department of Computer Sciences
University of Texas at Austin
August 2004
Pictures (Contd…)
Ventricle Expanded
Center for Computational Visualization
Institute of Computational and Engineering Sciences
Department of Computer Sciences
University of Texas at Austin
August 2004
Pictures (Contd…)
Ventricle Contracts
Center for Computational Visualization
Institute of Computational and Engineering Sciences
Department of Computer Sciences
University of Texas at Austin
August 2004
Pictures (Contd…)
Blood Leaving
Center for Computational Visualization
Institute of Computational and Engineering Sciences
Department of Computer Sciences
University of Texas at Austin
August 2004
Future work
 Have the blood particles collide with the wall of the heart for more accuracy and
precision
 Make the blood deform the heart
 Have the valves react with the movement of the blood
 Physical Simulation
Center for Computational Visualization
Institute of Computational and Engineering Sciences
Department of Computer Sciences
University of Texas at Austin
August 2004
Conclusion
 Maya is a really powerful tool
 Basic techniques of animation
Center for Computational Visualization
Institute of Computational and Engineering Sciences
Department of Computer Sciences
University of Texas at Austin
August 2004