GMS:3D Grid Types: Difference between revisions
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When a dataset is imported to a cell-centered grid, there is one value in the dataset for each cell. To use contouring or fringing the values at the cell corners must be known. Therefore, whenever contouring or fringing is performed, the values at the cell centers are interpolated to the cell corners. Interpolation to cell corners is only done for visualization. All computations performed using the [[Data Calculator]] are performed on the original values at the cell centers. With mesh-centered grids, all visualization and computations are performed at the cell corners and no interpolation is necessary. | When a dataset is imported to a cell-centered grid, there is one value in the dataset for each cell. To use contouring or fringing the values at the cell corners must be known. Therefore, whenever contouring or fringing is performed, the values at the cell centers are interpolated to the cell corners. Interpolation to cell corners is only done for visualization. All computations performed using the [[Data Calculator]] are performed on the original values at the cell centers. With mesh-centered grids, all visualization and computations are performed at the cell corners and no interpolation is necessary. | ||
All of the model interfaces in the 3D Grid module are based on cell-centered grids. Mesh-centered grids are useful for interpolation and | All of the model interfaces in the 3D Grid module are based on cell-centered grids. Mesh-centered grids are useful for interpolation and isosurface visualization since no extra interpolation is necessary. | ||
{{hide in print|[[Image:GridType2.gif|none|frame|''(a) Cell Centered Grid (b) Mesh Centered Grid'']]}} | {{hide in print|[[Image:GridType2.gif|none|frame|''(a) Cell Centered Grid (b) Mesh Centered Grid'']]}} | ||