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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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wiki:documentation:devguide:geometry_module [2016/01/20 09:21] gribeiro [LineString] |
wiki:documentation:devguide:geometry_module [2016/02/12 09:36] (current) gribeiro [General Concepts] |
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| * A 1-dimensional geometry is one with a geometric dimension of 1 (one). Curves (lines) are 1-dimensional objects. | * A 1-dimensional geometry is one with a geometric dimension of 1 (one). Curves (lines) are 1-dimensional objects. | ||
| * A 2-dimensional geometry is one with a geometric dimension of 2 (two). Surfaces (polygons) are 2-dimensional objects. | * A 2-dimensional geometry is one with a geometric dimension of 2 (two). Surfaces (polygons) are 2-dimensional objects. | ||
| - | * We can have geometries in ℜ2, ℜ3 or ℜ4 coordinate spaces. | + | * We can have geometries in ℜ<sup>2</sup>, ℜ<sup>3</sup> or ℜ<sup>4</sup> coordinate spaces. |
| * The //z// coordinate value not necessarely represents altitude. | * The //z// coordinate value not necessarely represents altitude. | ||
| * The //m// coordinate value represents arbitrary measurement. | * The //m// coordinate value represents arbitrary measurement. | ||
| * The term //ring// is applied to a closed curve (the first and last points are coincident). | * The term //ring// is applied to a closed curve (the first and last points are coincident). | ||
| - | |||
| ===== Geometry Class Hierarchy ===== | ===== Geometry Class Hierarchy ===== | ||
| Line 94: | Line 93: | ||
| <code cpp> | <code cpp> | ||
| - | std::unique_ptr<te::gm::LinearRing> r = std::make_unique<te::gm::LinearRing>(5, te::gm::LineStringType, 0); | + | te::gm::LinearRing r(5, te::gm::LineStringType, 0); |
| - | r->setPoint(0, 1, 2); | + | r.setPoint(0, 1, 2); |
| - | r->setPoint(1, 1, 7); | + | r.setPoint(1, 1, 7); |
| - | r->setPoint(2, 7, 7); | + | r.setPoint(2, 7, 7); |
| - | r->setPoint(3, 7, 2); | + | r.setPoint(3, 7, 2); |
| - | r->setPoint(4, 1, 2); | + | r.setPoint(4, 1, 2); |
| </code> | </code> | ||
