CashFlow, A Visualization Framework for 3D Flow - Studierstube ...

Implementation4.5. Implementation of SoBaseGridSoStructuredGrid2D NodesSoStructuredGrid2D SoStructuredGrid → SoBaseGrid → SoNode → . . .SoCurvilinearGrid2D Each face contains of 4 vertices. The edges can be aligned in any angle.SoRectangularGrid2D Each face contains of 4 vertices. Each adjacent edge is orthogonal to each other.SoRegularSpacedRectangularGrid2D The spacing is constant for each principal direction. This is also known as Cartesiangrid [Wal95] (see figure 4.12a) on page 84).SoIrregularSpacedRectangularGrid2D Same as a Cartesian grid, but the spacing may differ for all faces per row and percolumn. (see figure 4.12b) on page 84).SoRadialGrid2DSoCylindricGrid2D This grid is the 2D shell of a cylinder in 3D (see figure 4.17 on page 90). Parametersare the radius and the height of the cylinder.SoRegularSpacedCylindricalGrid2D The spacing of the grid is constant like the SoRegularSpacedRectangularGrid2D(see figure 4.13 on page 89).SoIrregularSpacedCylindricalGrid2D The spacing of the grid is variable like the SoIrregularSpacedRectangularGrid2DSoPolarGrid2D Top surface of a cylinder in 3D. Identical to the polar coordinate system in 2D.The inner radius may be zero.SoRegularSpacedPolarGrid2D The radius increment is constant as well as the angular increment. (see figure4.14a) on page 89)SoIrregularSpacedPolarGrid2D The radius increment is variable and the angular increment is also variable. (seefigure 4.14b) on page 89)SoSphericalGrid2D Surface of a sphere with constant radius. Two variables are mapped to angularazimuth and angular altitude (see one layer in figure 4.18 on page 90).SoRegularSpacedSphericalGrid2D The angular azimuth increment and the angular altitude increment are constant.SoIrregularSpacedSphericalGrid2D The angular azimuth increment and the angular altitude increment are variable.86