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visage_iso_surface(visage)Scientific Visualizationvisage_iso_surface(visage)

NAME

visage_iso_surface - VISAGE object to compute 3D contour surface

DESCRIPTION

The visage_iso_surface object computes a 3D contour surface given a VISAGE data set. That is, given a 3D geometry, scalar function, and a scalar value, compute the surface of the specified scalar value. Visage_iso_surface uses the Marching Cubes algorithm developed by Lorensen and Cline at GE CR&D.

SUPERCLASS

visage_computed_feature

INSTANCE VARIABLES

value the scalar value of the iso-surface to create. If the value is outside of the range of the scalar_data, no surface will be created.

color_method flag to indicate whether the surface should be colored by the property color or by the current scalar range and color lookup table.

mcubes internal variable to hold pointer to marching cubes object. The marching cubes object uses the Marching Cubes algorithm on a single cell at a time.

MESSAGES

value=,+ value Set/add the current scalar value.

value? Get the current scalar value.

color_method= value Set the color method. If value =1.0 the iso- surface is colored by the scalar value (based on current lookup table). If value =0.0 the iso- surface is colored by the property color value.

color_method? Get the current color method.

color_by_value! Color the iso-surface by scalar value.

color_by_property! Color the iso-surface by the property color.

structured_grid_set: data_set Create display appropriate for structured grid from visage data set provided.

unstructured_grid_set: data_set Create display appropriate for unstructured grid from visage data set provided.

structured_point_set: data_set Create display appropriate for structured point set from visage data set provided.

unstructured_point_set: data_set Create display appropriate for unstructured point set from visage data set provided.

tagus_set: data_set Create display appropriate for tagus geometry from visage data set provided.

EXAMPLE

See the complete example in visage_data_group.