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A System for Modeling Flowers Combining Interactive and Procedural Methods

A System for Modeling Flowers Combining Interactive and Procedural Methods. Adam Kromm – CPSC 502 Project. Introduction and Motivation. Introduction and Motivation. Computer Imagery Video Games Movies Pictures. Introduction and Motivation. Biological Classrooms Simulation Studies

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A System for Modeling Flowers Combining Interactive and Procedural Methods

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  1. A System for Modeling Flowers Combining Interactive andProcedural Methods Adam Kromm – CPSC 502 Project

  2. Introduction and Motivation

  3. Introduction and Motivation • Computer Imagery • Video Games • Movies • Pictures

  4. Introduction and Motivation • Biological • Classrooms • Simulation Studies • Mechanics

  5. Introduction and Motivation Wild Rose Chrysanthemum

  6. Background

  7. Background Geometric Modeling of Organs Organ Distribution Intersection Resolution Animation of Development

  8. Geometric Modeling of Organs • Sketch Based • Organ shapes • Anastacio, Ijiri

  9. Geometric Modeling of Organs • Image-Based • Quon

  10. Geometric Modeling of Organs • Traditional Methods • Generic Modeller • Bezier Patches

  11. Organ Distribution • Sketch Based • Whole Plant • Ijiri, Anastacio • Floral Diagrams and Inflorescences • Ijiri

  12. Organ Distribution • L-Systems • Custom Made • Prusinkiewicz, • Predefined • Anastacio, Streit

  13. Intersection Resolution • Borrowed from physics • Surface-based Growth Simulation for Opening Flowers • Ijiri

  14. Problem Position A specialized system for quickly modeling diverse flowers. Requirements: • Possibility to model a wide variety of flowers • Simple and intuitive interface • Combine interactive and procedural modeling methods • Resolve intersections

  15. Proposed Solution

  16. General Design

  17. Geometric Modeling of Organs • Sketch-based interface • Interactive and procedural methods • Surfaces and volumes • Conforming Delaunay Triangulation • Surface of revolution

  18. Geometric Modeling of Organs • Deformations • Horizontal deformations • Vertical deformations

  19. Organ Distribution • Inspired by floral diagrams • Each dot is an organ • The color of the dot is the same as the organ color • Phyllotactic placement • Uniform distribution around a circle.

  20. Organ Orientation • Automatic orientation • Based on position • Interactive orientation • Rotate around x-axis and z-axis

  21. Intersection Detection • Modifications • Use triangle edges • Position based dynamics

  22. Intersection Resolution • Determine point of intersection • Find distance to object boundaries

  23. Intersection Resolution • Direction of movement • If edge is closest to boundary • Move edge opposite direction of boundary • If triangle is closest to boundary • Move edge towards boundary

  24. Results

  25. Results Apple Flower Lily

  26. Results Tulip – 13 minutes Water Lily – 17 minutes

  27. Results Sunflower – 13 minutes Blue Wild Flower – 14 Minutes

  28. Conclusion

  29. Conclusion • Flower modeling system combining procedural and interactive methods. • Helps resolve intersections • Simple and intuitive interface

  30. Future Work

  31. Future Work • User studies • Gradients • Complex colors and patterns • Variations • Wrinkles • Imperfections • Complex collisions

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