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Subject: Scientific visualization × Has files: true × Start date: 2004 × End date: 2009 ×

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    Marching Square
    (The Eurographics Association, 6-8-2004) Hanisch, Frank; -
    This interactive CGEM illustrates the marching squares algorithm, a 2D isoline representation technique commonly used for contouring. Teachers may also use this CGEM to introduce the 3D marching cubes algorithm, which uses the same approach [1]. Users can directly manipulate two circle objects. The shape of the objects is considered unknown. After sampling the objects on a regular grid, the marching squares algorithm approximates the contour. Users may move the circles to adjacent locations to experience how we resolve ambiguous cases by an additional midpoint test.