Heightfield

The Heightfield command creates a NURBS surface or mesh based on grayscale values of the pixels in an image file.

A grayscale z-buffer bitmap generated from 3-D objects by the ShowZBuffer command.

The mesh object created from the grayscale z-buffer bitmap by the Heightfield command .

Steps

1. Select an image file.

2. Pick the first corner. The base of the surface will be parallel to the current construction plane.

3. Pick the second corner or type a length. The shape of the pick rectangle will match the aspect ratio of the image file.

4. Specify options.

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Heightfield Options

Number of sample points ___ x ___ The image's "height" is sampled at the specified number of control points along the u and v directions of the image.

Sample count is ___ of 10000 (surface only) Height ___ <units> Sets the scale of the height of the object.

Set image as texture Uses the image as a render texture for the created object.

Create vertex colors (mesh only) Evaluates the color of the texture at each texture coordinate (u,v) and sets the vertex color to match.

Create object by

Mesh with vertexes at sample locations Creates a mesh with vertex points at each of the sample locations.

Surface with control points at sample location Creates a surface with control points at each of the sample locations.

Interpolate surface through samples Creates a surface that passes through each sample location's height.

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For more information, please refer to the Rhino documentation.