Fractals and Iterated Affine Transformations Dr Scott Schaefer
- Slides: 193
Fractals and Iterated Affine Transformations Dr. Scott Schaefer 1
What are Fractals? 2/193
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What are Fractals? 5/193
What are Fractals? n Recursion made visible n A self-similar shape created from a set of contractive transformations 6/193
Contractive Transformations n A transformation F(X) is contractive if, for all compact sets Transformations on sets? n Distance between sets? n 7/193
Transformations on Sets n Given a transformation F(x), n In other words, F(X) means apply the transformation to each point in the set X 8/193
Hausdorff Distance 9/193
Hausdorff Distance 10/193
Hausdorff Distance 11/193
Hausdorff Distance 12/193
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Hausdorff Distance 15/193
Hausdorff Distance 16/193
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Hausdorff Distance 18/193
Contractive Transformations n A transformation F(X) is contractive if, for all compact sets 19/193
Iterated Affine Transformations n Special class of fractals where each transformation is an affine transformation 20/193
Rendering Fractals Given starting set X 0 n Attractor is 21/193
Rendering Fractals Given starting set X 0 n Attractor is 22/193
Rendering Fractals Given starting set X 0 n Attractor is 23/193
Rendering Fractals Given starting set X 0 n Attractor is 24/193
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Contractive Transformations n A transformation F(X) is contractive if, for all compact sets n A set of transformations has a unique attractor if all transformations are contractive u That attractor is independent of the starting shape!!! 50/193
Rendering Fractals 51/193
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Finding Transformations 65/193
Finding Transformations 66/193
Finding Transformations 67/193
Finding Transformations 68/193
Finding Transformations 69/193
Fractal Tennis Start with any point x For ( i=1; i<100; i++ ) x = Mrandom*x For ( i=1; i<100000; i++ ) draw(x) x = Mrandom*x 70/193
Fractal Tennis Start with any point x For ( i=1; i<100; i++ ) x = Mrandom*x For ( i=1; i<100000; i++ ) draw(x) x = Mrandom*x Gets a point on the fractal 71/193
Fractal Tennis Start with any point x For ( i=1; i<100; i++ ) x = Mrandom*x For ( i=1; i<100000; i++ ) draw(x) x = Mrandom*x Creates new points on the fractal 72/193
Fractal Tennis – Example 25, 000 Points 73/193
Fractal Tennis – Example 50, 000 Points 74/193
Fractal Tennis – Example 75, 000 Points 75/193
Fractal Tennis – Example 100, 000 Points 76/193
Fractal Tennis – Example 125, 000 Points 77/193
Fractal Tennis – Example 150, 000 Points 78/193
Fractal Tennis – Example 175, 000 Points 79/193
Fractal Tennis – Example 200, 000 Points 80/193
Modified Fractal Tennis 81/193
Modified Fractal Tennis 25, 000 Points 82/193
Modified Fractal Tennis 50, 000 Points 83/193
Modified Fractal Tennis 75, 000 Points 84/193
Modified Fractal Tennis 100, 000 Points 85/193
Modified Fractal Tennis 125, 000 Points 86/193
Modified Fractal Tennis 150, 000 Points 87/193
Modified Fractal Tennis 175, 000 Points 88/193
Modified Fractal Tennis 200, 000 Points 89/193
Modified Fractal Tennis n Weight probabilities based on area 200, 000 Points 90/193
Modified Fractal Tennis n Weight probabilities based on area 25, 000 Points 91/193
Modified Fractal Tennis n Weight probabilities based on area 50, 000 Points 92/193
Modified Fractal Tennis n Weight probabilities based on area 75, 000 Points 93/193
Modified Fractal Tennis n Weight probabilities based on area 100, 000 Points 94/193
Modified Fractal Tennis n Weight probabilities based on area 125, 000 Points 95/193
Modified Fractal Tennis n Weight probabilities based on area 150, 000 Points 96/193
Modified Fractal Tennis n Weight probabilities based on area 175, 000 Points 97/193
Modified Fractal Tennis n Weight probabilities based on area 200, 000 Points 98/193
Condensation Sets n Given a condensation set C 99/193
Condensation Set Example 100/193
Condensation Sets – Example Condensation Set 101/193
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Rendering Fractals 122/193
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Condensation Set Example 130/193
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Fractal Dimension n Fractal dimension = 141/193
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Weird Fractal Properties n Fractal curves can have infinite length!!! 179/193
Weird Fractal Properties n Fractal curves can have infinite length!!! 180/193
Weird Fractal Properties n Fractal curves can have infinite length!!! 181/193
Weird Fractal Properties n Fractal curves can have infinite length!!! 182/193
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Weird Fractal Properties n Fractal curves can have infinite length!!! 184/193
Weird Fractal Properties n Fractal curves can have infinite length!!! 185/193
Weird Fractal Properties Fractal curves can have infinite length!!! n But only enclose finite area? n 186/193
Weird Fractal Properties Fractal curves can have infinite length!!! n But only enclose finite area? n 187/193
Weird Fractal Properties Fractal curves can have infinite length!!! n But only enclose finite area? n 188/193
Weird Fractal Properties Fractal curves can have infinite length!!! n But only enclose finite area? n 189/193
Weird Fractal Properties Fractal curves can have infinite length!!! n But only enclose finite area? n 190/193
Weird Fractal Properties Fractal curves can have infinite length!!! n But only enclose finite area? n 191/193
Weird Fractal Properties Fractal curves can have infinite length!!! n But only enclose finite area? n 192/193
Weird Fractal Properties 193/193
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