Animation of the Human Heart

Center for Computational VisualizationInstitute of Computational and Engineering SciencesDepartment 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 VisualizationInstitute of Computational and Engineering SciencesDepartment 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 VisualizationInstitute of Computational and Engineering SciencesDepartment 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 VisualizationInstitute of Computational and Engineering SciencesDepartment 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 VisualizationInstitute of Computational and Engineering SciencesDepartment 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 VisualizationInstitute of Computational and Engineering SciencesDepartment of Computer Sciences University of Texas at Austin August 2004

PicturesAtrium Expanded

Center for Computational VisualizationInstitute of Computational and Engineering SciencesDepartment of Computer Sciences University of Texas at Austin August 2004

Pictures (Contd…)Valve Opening

Center for Computational VisualizationInstitute of Computational and Engineering SciencesDepartment of Computer Sciences University of Texas at Austin August 2004

Pictures (Contd…)

Ventricle Expanded

Center for Computational VisualizationInstitute of Computational and Engineering SciencesDepartment of Computer Sciences University of Texas at Austin August 2004

Pictures (Contd…)

Ventricle Contracts

Center for Computational VisualizationInstitute of Computational and Engineering SciencesDepartment of Computer Sciences University of Texas at Austin August 2004

Pictures (Contd…)

Blood Leaving

Center for Computational VisualizationInstitute of Computational and Engineering SciencesDepartment 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 VisualizationInstitute of Computational and Engineering SciencesDepartment of Computer Sciences University of Texas at Austin August 2004

Conclusion

Maya is a really powerful tool Basic techniques of animation

Center for Computational VisualizationInstitute of Computational and Engineering SciencesDepartment of Computer Sciences University of Texas at Austin August 2004