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The concept VectorField_2 describes the set of requirements to be fulfilled by any class used to instantiate the first template parameter of the class Stream_lines_2<VectorField_2,Integrator_2>. This concept provides the types of the geometric primitives used in the placement of streamlines and some functions for answering different queries.
| VectorField_2::Geom_traits | |
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The traits class.
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| VectorField_2::FT | |
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The scalar type.
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| VectorField_2::Point_2 | |
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The point type.
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| VectorField_2::Vector_2 | |
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The vector type.
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| VectorField_2 vfield; | |
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Any constructor has to allow the user to fill the vector values (i.e. assign a vector to each position within the domain).
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| Geom_traits::Iso_rectangle_2 | vfield.bbox () | returns the bounding box of the whole domain. | ||
| std::pair<Vector_2,FT> | vfield.get_field ( Point_2 p) |
returns the vector field value and the local density.
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| bool | vfield.is_in_domain ( Point_2 p) | returns true if the point p is inside the domain boundaries, false otherwise. | ||
| FT | vfield.get_integration_step ( Point_2 p) | |||
returns the integration step at the point p (i.e. the distance between p and the next point in the polyline.).
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