Computer graphics processing and selective visual display system – Computer graphics processing – Graph generating
Patent
1995-07-18
1998-03-24
Jankus, Almis R.
Computer graphics processing and selective visual display system
Computer graphics processing
Graph generating
G06T 1700
Patent
active
057318190
ABSTRACT:
A three-dimensional graphic object appearing in an animation is deformed to simulate the effects of motion on the object. A user can selectively apply a stretch, yield, or flex deformation effect to the control vertices of the object, to change the shape of the object as a function of any of a linear velocity, angular velocity, linear acceleration, or angular acceleration of the object. Various other parameters for each of these deformation effects can also be selected and set by the user, including a sensitivity to the motion in generating the deformation and a maximum deformation. The flex deformation can selectively be set to either a linear or curved profile, simulating the effect of friction applied by the environment on one or more surfaces of the object. The stretch deformation can selectively be set to either a constant or a free volume to simulate the effect of inertia, causing a body to elongate or shrink in the direction of the movement. The yield deformation can be set either a linear or curved profile, simulating the displacement of an object's internal matter toward one end that occurs, relative to the direction of the object's motion, i.e., causing one end to bulge. For each control vertex on the object, an effect offset is determined for each motion component and for each selected deformation effect. The sum of the effect offsets for the control vertex represents a total offset that is added to the original control vertex to determine a deformed control vertex. This step is repeated for all control vertices to produce the deformed object.
REFERENCES:
patent: 5214758 (1993-05-01), Ohba et al.
patent: 5267154 (1993-11-01), Takeuchi et al.
patent: 5315692 (1994-05-01), Hansen et al.
Pajon et al. "Direct Mouse-Driven Manipulations for Interactive Visualization of Structured Data" (1993).
Boucher Yves
Gagne Rejean
Verville Vincent
Anderson Ronald M.
Jankus Almis R.
Softimage
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