Solid Texturing of Soft Objects

Abstract

Since the shape of a soft object changes in response to its surroundings, it is difficult to give a single position in space as the location of the object. Indeed objects can and do break dynamically into subobjects. This means that you cannot map a solid texture onto such an object simply by using a function of the space coordinates. We have taken a different approach. Our soft objects are modeled as the volume enclosed by an isosurf ace of a field calculated from a set of key points. For each key point, we describe an abstract texture space. Any point on the surface of an object has, associated with each key point, a position in this space and a field contribution. A vector sum of these positions, weighted by the field contributions, is used to select a surface specification from the texture space. Textures mapped with this process retain their consistency during distortion and metamorphoses of objects, permitting a great variety of animation effects.

Keywords

This publication has 11 references indexed in Scilit:

Animatingsoft objects
The Visual Computer, 1986
Data structure forsoft objects
The Visual Computer, 1986
An image synthesizer
ACM SIGGRAPH Computer Graphics, 1985
Efficient alias-free rendering using bit-masks and look-up tables
ACM SIGGRAPH Computer Graphics, 1985
Solid texturing of complex surfaces
Published by Association for Computing Machinery (ACM) ,1985
The A -buffer, an antialiased hidden surface method
Published by Association for Computing Machinery (ACM) ,1984
A Generalization of Algebraic Surface Drawing
ACM Transactions on Graphics, 1982
Simulation of wrinkled surfaces
Published by Association for Computing Machinery (ACM) ,1978
Texture and reflection in computer generated images
Communications of the ACM, 1976
Continuous Shading of Curved Surfaces
IEEE Transactions on Computers, 1971