The design of Allegra, a new type of instrument for animated graphics is presented. It relies on the cohesive coupling of video image analysis and mass-spring system animation. The system allows for direct manipulation through the modification of a 3D scene or through a live video of the user. GPU-based physics computation enables large scale real-time mass spring system animation that makes th...

Modeling is an essential part of the analysis and the design of dynamic systems. Contemporary computer algorithms can produce very detailed models for complex systems with little time and effort. However, over complicated models may not be efficient. Therefore, reducing a model to a more manageable size has become an attractive research topic. A very useful type of reduced models is obtained by...

A qualitative model of the spatio-temporal behaviour of distributed parameter systems based on physical fields is presented. Field-based models differ from the object-based models normally used in qualitative physics by treating parameters as continuous entities instead of as attributes of discrete objects. This is especially suitable for natural physical systems, e.g. in ecology. The model is ...