volume renderer
volume renderer directly renders a 3D uniform field using either the Back-to-Front (BTF) or Ray-tracing volume rendering techniques. The Ray-tracing mode is available to both OpenGL and the software renderer. The BTF renderer, which is configured as the default, is available only in the OpenGL renderer.
NOTE: This module and its rendering technique are not supported in C Tech Web Scenes (CTWS files).
The basic concept of volume rendering is quite different than any other rendering technique in EVS. volume renderer converts data into a fuzzy transparent cloud where data values at each point in a 3D grid are represented by a particular color and opacity.
Ports
| Direction | Name | Type | Description |
|---|---|---|---|
| Input | Input Field | Field | The field to use for rendering. |
| Output | Output Object | Renderable | A renderable object to display. |
Properties
| Property | Type | Description |
|---|---|---|
| Data Component | Choice | The nodal data component to be volume rendered. |
| Range 1 Cut Off Value | Double | Range 1 Cut Off Value slider allows positioning the breakpoint of the two data ranges to be adjusted. By default, it is set to the midpoint of the input nodal data range. The first range in the datamap spans from the minimum data value to the breakpoint. The second range spans from the breakpoint to the maximum data value. |
| Data Min | Double | The Data Min is the minimum value for the selected data component. |
| Data Max | Double | The Data Max is the maximum value for the selected data component. |
| Minimum Opacity Range 1 | Double | The Minimum Opacity of the first data range. |
| Minimum Color Range 1 | Color | The data map color for the minimum of the first data range. |
| Maximum Opacity Range 1 | Double | The Maximum Opacity of the first data range. We recommend that this value should equal the value for Minimum Opacity Range 2 in most cases. |
| Maximum Color Range 1 | Color | The data map color for the maximum of the first data range. |
| Range 2 Min Values | Choice: Color and Opacity Linked, Color Linked, User Set | The Range 2 Min Values control will control how the opacity and color for the second range is set relative to the maximum color and opacity of range 1. |
| Minimum Opacity Range 2 | Double | The Minimum Opacity of the second data range. We recommend that this value should equal the value for Maximum Opacity Range 1 in most cases. |
| Minimum Color Range 2 | Color | The data map color for the minimum of the second data range. |
| Maximum Opacity Range 2 | Double | The Maximum Opacity for the second data range. |
| Maximum Color Range 2 | Color | The data map color for the maximum of the second data range. |
| Coarse | Boolean | The Coarse toggle provides for a low resolution quick version of software rendering. This is useful for setting parameters, but is not recommended for final output. |