OpenGL Insights

Real-Time Physically Based

Deformation Using

Transform Feedback

Muhammad Mobeen Movania and Lin Feng

17.1 Introduction

This chapter describes a method for implementing real-time deformation using the

transform feedback mechanism of the modern GPU. We will begin with an intro-

duction to the transform feedback mechanism and how it might be exploited to

implement a deformation pipeline. Numerous physically based deformation models

have been proposed in the literature [Nealen et al. 06]. To demonstrate the power of

the proposed acceleration techniques, we implement a basic cloth simulation using

the mass spring system (see Figure 17.1).

The vertex shader