Create Sphere (Lambert Projection Technique)¶
Group (Subgroup)¶
Surface Meshing (Processing)
Description¶
This filter will generate a 3D Unit sphere using a techinque involving a transformation from a Lambert Square to a Unit Sphere.
The algorithm uses equations (8) & (9) from the paper D. Rosca, "New uniform grids on the sphere" Astronomy & Astrophysics, 520, A63 (2010) http://www.aanda.org/articles/aa/pdf/2010/12/aa15278-10.pdf
The algorithm proceeds to create a vertex at the corner of every pixel in the image and a quad cell type for every pixel. The resulting Quad mesh is an equal area mesh.
Parameters¶
| Name | Type | Description |
|---|---|---|
| Hemisphere | int | 0=Northern, 1=Southern |
| Create Vertex Geometry | Bool | Creates Vertex Geometry |
| Create Edge Geometry | Bool | Creates Edge Geometry |
| Create Triangle Geometry | Bool | Creates Triangle Geometry |
| Create Quad Geometry | Bool | Creates Quad Geometry |
| Map Image Data | Bool | Assigns values from the array to the elements of the new geometries |
Required Geometry¶
None
Required Objects¶
| Kind | Default Name | Type | Component Dimensions | Description |
|---|---|---|---|---|
| Data Array | Image Data | UInt8 | 1 | Gray Scale image. |
Generating a GrayScale Image¶
First use the Color Table filter to generate a color table. Use the "Gray Scale" preset for this. The new array will actually be an RGB or 3 Component UInt8 array. You can either use the Extract Component as Array filter or the Color to GrayScale filter to create the final gray scale image.
Created Objects¶
| Kind | Default Name | Type | Component Dimensions | Description |
|---|---|---|---|---|
| Output Vertex Geometry | Vertex Geometry | Parent Geomerty | ||
| Output Edge Geometry | Edge Geometry | Parent Geomerty | ||
| Output Triangle Geometry | Triangle Geometry | Parent Geomerty | ||
| Output Quad Geometry | Quad Geometry | Parent Geomerty |
Created Geometry¶
Vertex, Edge, Triangle, QuadGeometry
Example Pipelines¶
- Create Lambert Sphere Surface
License & Copyright¶
Please see the description file distributed with this Plugin
DREAM.3D Mailing Lists¶
If you need more help with a Filter, please consider asking your question on the DREAM.3D Users Google group!