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Procedural and interactive icicle modeling

Procedural and interactive icicle modeling. Jonathan Gagnon Eric Paquette. Icy challenges. photograph. Goal Control Fast computation. Overview. Previous work Proposed approach Results Limitations & Conclusion. Overview. Previous work Proposed approach Results

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Procedural and interactive icicle modeling

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  1. Procedural and interactive icicle modeling Jonathan Gagnon Eric Paquette

  2. Icy challenges photograph J. Gagnon & E. Paquette • Goal • Control • Fast computation

  3. Overview J. Gagnon & E. Paquette Previous work Proposed approach Results Limitations & Conclusion

  4. Overview J. Gagnon & E. Paquette Previous work Proposed approach Results Limitations & Conclusion

  5. Previous work: Frost J. Gagnon & E. Paquette Microdroplets • Kim et al . 2003 • Phase field • Kim et al. 2004a • Phase field, DLA,fluid simulation • Realistic • No volume

  6. Previous work: Glaciology J. Gagnon & E. Paquette • Makkonen 1988 • Growth vectors • Convection and conduction • Maneo et al. 1994 • Dentritic growth • Szilder et Lozowski 1994 • Predict the form

  7. Previous work: Computer Graphics J. Gagnon & E. Paquette • Kharitonsky et Gonczarowski 1993 • Surface tension, tendency of water drop to follow a wet path. • Kim et al. 2006 • Stephan problem • Problems • Control • Computation time

  8. Overview J. Gagnon & E. Paquette Previous work Proposed approach Results Limitations & Conclusion

  9. Procedural icicle modeling J. Gagnon & E. Paquette

  10. Procedural icicle modeling J. Gagnon & E. Paquette

  11. Water Coefficients J. Gagnon & E. Paquette • Goal • Compute the water flow • Steps • Compute the water supply • Compute the water coefficient

  12. Water Supply • Scatter & Ray-trace J. Gagnon & E. Paquette Source surface

  13. Water Supply J. Gagnon & E. Paquette

  14. Water Flow J. Gagnon & E. Paquette Compute the water coefficient

  15. Water Flow J. Gagnon & E. Paquette Compute the water coefficient

  16. Water Flow J. Gagnon & E. Paquette Compute the water coefficient

  17. Water Flow J. Gagnon & E. Paquette Compute the water coefficient

  18. Water Flow J. Gagnon & E. Paquette Compute the water coefficient

  19. Water Flow J. Gagnon & E. Paquette Compute the water coefficient

  20. Water Flow J. Gagnon & E. Paquette Compute the water coefficient

  21. Water Flow J. Gagnon & E. Paquette Compute the water coefficient

  22. Water Flow J. Gagnon & E. Paquette Compute the water coefficient

  23. Water Flow J. Gagnon & E. Paquette Compute the water coefficient

  24. Water Flow J. Gagnon & E. Paquette Compute the water coefficient

  25. J. Gagnon & E. Paquette

  26. Water Coefficients J. Gagnon & E. Paquette

  27. Water Coefficients J. Gagnon & E. Paquette Works well with several surfaces

  28. Procedural icicle modeling J. Gagnon & E. Paquette

  29. Drip points identification J. Gagnon & E. Paquette • Goal • Find were the water drips • Steps • Find drip region • Place drip points

  30. Drip Criterion J. Gagnon & E. Paquette

  31. Drip region J. Gagnon & E. Paquette

  32. Drip points • Randomly distributed on the drip region J. Gagnon & E. Paquette

  33. Procedural icicle modeling J. Gagnon & E. Paquette

  34. Icicles’ trajectories J. Gagnon & E. Paquette • Goal • Create a guide for each icicle • Previzualisation • Interactive modification • Simulate different icicle types • Straight • Curved • Divided

  35. Icicles’ trajectories J. Gagnon & E. Paquette • L-System

  36. L-System J. Gagnon & E. Paquette

  37. Broad range of results J. Gagnon & E. Paquette

  38. Collision handling J. Gagnon & E. Paquette

  39. Procedural icicle modeling J. Gagnon & E. Paquette

  40. Surface creation J. Gagnon & E. Paquette • Goal • Create a photorealistic icicle mesh • Provide configurable surface • Manage fusion between icicles • Attach the icicle to the surface

  41. Surface creation J. Gagnon & E. Paquette • Methodology • Profile function • Icicle’s base function • Glaze ice function

  42. Surface creation J. Gagnon & E. Paquette • Methodology • Profile function • Icicle’s base function • Glaze ice function

  43. Profile function J. Gagnon & E. Paquette

  44. Profile function J. Gagnon & E. Paquette

  45. Profile function { J. Gagnon & E. Paquette {

  46. Profile function J. Gagnon & E. Paquette

  47. Implicit surface modeling J. Gagnon & E. Paquette Using metaballs Radius is defined by the profile function Positionned along the trajectory

  48. Surface creation: results J. Gagnon & E. Paquette

  49. Real vs generated J. Gagnon & E. Paquette

  50. Surface creation J. Gagnon & E. Paquette • Methodology • Profile function • Icicle’s base function • Glaze ice function

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