Display of clouds taking into account multiple anisotropic scattering and sky light
SIGGRAPH '96 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques
Teddy: a sketching interface for 3D freeform design
Proceedings of the 26th annual conference on Computer graphics and interactive techniques
A simple, efficient method for realistic animation of clouds
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
Smooth meshes for sketch-based freeform modeling
I3D '03 Proceedings of the 2003 symposium on Interactive 3D graphics
Effective Volume Sampling of Solid Models using Distance Measures
CGI '99 Proceedings of the International Conference on Computer Graphics
Simulation of cloud dynamics on graphics hardware
Proceedings of the ACM SIGGRAPH/EUROGRAPHICS conference on Graphics hardware
A real-time cloud modeling, rendering, and animation system
Proceedings of the 2003 ACM SIGGRAPH/Eurographics symposium on Computer animation
Efficient rendering of dynamic clouds
VRCAI '04 Proceedings of the 2004 ACM SIGGRAPH international conference on Virtual Reality continuum and its applications in industry
Sketch-based modeling with few strokes
Proceedings of the 21st spring conference on Computer graphics
Improved skeleton extraction and surface generation for sketch-based modeling
GI '07 Proceedings of Graphics Interface 2007
Plushie: an interactive design system for plush toys
ACM SIGGRAPH 2007 papers
A sketching interface for modeling the internal structures of 3D shapes
ACM SIGGRAPH 2007 courses
Feedback control of cumuliform cloud formation based on computational fluid dynamics
ACM SIGGRAPH 2008 papers
Rapid sketch modeling of clouds
SBM'08 Proceedings of the Fifth Eurographics conference on Sketch-Based Interfaces and Modeling
Rendering of 3D dynamic virtual environments
Proceedings of the 4th International ICST Conference on Simulation Tools and Techniques
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Like many natural phenomenon, clouds are often modeled using procedural methods, which may be difficult for an artist to control. In this paper, a freehand sketching system is proposed to control the modeling of volumetric clouds. Input sketches are used to generate a closed mesh, defining the initial cloud volume. Sketch analysis as well as the elevation at which the cloud is drawn is used to identify the cloud type and then generate a mesh with the appropriate characteristics for the determined cloud type. The cloud volume can then be edited using Boolean operations that allow for addition and removal of material from existing clouds. The proposed modeling system provides an intuitive framework for generating individual clouds and entire cloud fields, while maintaining the interactive rates necessitated by the sketch-based paradigm.