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A Caltech Library Repository Feedhttp://www.rssboard.org/rss-specificationpython-feedgenenSat, 13 Apr 2024 00:54:10 +0000Controlling Rigid Bodies with Dynamic Constraints
https://resolver.caltech.edu/CaltechCSTR:1988.cs-tr-88-19
Authors: {'items': [{'id': 'Barzel-R', 'name': {'family': 'Barzel', 'given': 'Ronen'}}]}
Year: 1988
DOI: 10.7907/74710-08838
We present a technique, "Dynamic Constraints," for controlling the positions and orientations of rigid bodies n computer graphics models. The technique addresses the issue of providing control over a physically-based model, in which the bodies' behavior is determined by simulation of Newton's Laws of Motion. The "Dynamic Constraints" technique allows the modeler to control the configuration of bodies in a model by specifying constraints which must be met and maintained, as the simulation unfolds. To meet the constraints, we introduce forces into the model; these "constraint forces" forces are applied to the bodies that are constrained. We use an inverse dynamics method to derive a linear "constraint-force equation," whose solution yields the values of the constraint forces. We continually solve the constraint-force equation during the simulation of a model, so that the bodies' behavior will be consistent with the constraints. This thesis is accompanied by a narrated 10 -minuted videotape, "Caltech Modeling Demos, 1987" that contains several animations demonstrating the "Dynamic Constraints" technique. This thesis additionally includes a glossary of terms relating to physically-based modeling and dynamic constraints.https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/74710-08838A modeling system based on dynamic constraints
https://resolver.caltech.edu/CaltechAUTHORS:20160504-113236294
Authors: {'items': [{'id': 'Barzel-R', 'name': {'family': 'Barzel', 'given': 'Ronen'}}, {'id': 'Barr-A-H', 'name': {'family': 'Barr', 'given': 'Alan H.'}}]}
Year: 1988
DOI: 10.1145/378456.378509
We present "dynamic constraints," a physically-based technique for constraint-based control of computer graphics models. Using dynamic constraints, we build objects by specifying geometric constraints; the models assemble themselves as the elements move to satisfy the constraints.
The individual elements are rigid bodies which act in accordance with the rules of physics, and can thus exhibit physically realistic behavior. To implement the constraints, a set of "constraint forces" is found, which causes the bodies to act in accordance with the
constraints; finding these "constraint forces" is an inverse dynamics problem.https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/f0dqv-cgd39A modeling system based on dynamic constraints
https://resolver.caltech.edu/CaltechAUTHORS:20160504-113237163
Authors: {'items': [{'id': 'Barzel-R', 'name': {'family': 'Barzel', 'given': 'Ronen'}}, {'id': 'Barr-A-H', 'name': {'family': 'Barr', 'given': 'Alan H.'}}]}
Year: 1988
DOI: 10.1145/54852.378509
We present "dynamic constraints," a physically-based technique for constraint-based control of computer graphics models. Using dynamic constraints, we build objects by specifying geometric constraints; the models assemble themselves as the elements move to satisfy the constraints.
The individual elements are rigid bodies which act in accordance with the rules of physics, and can thus exhibit physically realistic behavior. To implement the constraints, a set of "constraint forces" is found, which causes the bodies to act in accordance with the
constraints; finding these "constraint forces" is an inverse dynamics problem.https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/czmdh-tht67Adjustable tools: an object-oriented interaction metaphor
https://resolver.caltech.edu/CaltechAUTHORS:20161213-172446354
Authors: {'items': [{'id': 'Salesin-D', 'name': {'family': 'Salesin', 'given': 'David'}}, {'id': 'Barzel-R', 'name': {'family': 'Barzel', 'given': 'Ronen'}}]}
Year: 1993
DOI: 10.1145/169728.214378
To provide a simpler metaphor for representing, selecting, and adjusting collections of attributes for interactive operations.https://authors.library.caltech.eduhttps://authors.library.caltech.edu/records/8736b-47k57