Proposed Shader Improvements

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Revision as of 13:16, 6 February 2006 by Gjtempl (talk | contribs) (→‎Issues)
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Overview

This document is a place to collect all proposals for shader changes/improvements/issues.

Issues

  • When material is unloaded, the state of the Property may not get restored --- vtkProperty should keep an internal state of the property before the material was loaded and restore to that state when the material is unloaded.
  • The XML attribute names could be a little clearer, some suggestions:
   -'ivar' refers to instance variables on vtk objects
   -'value' refers to numeric values or defined constants in the case of Cg transformation matrix settings.
   -'shader_var' refers to the name of particular hardware shader variables
   For the tags PropertyUniform, CameraUniform, LightUniform the current construction:
       <PropertyUniform value="Ambient" name="property.Ambient"> </PropertyUniform>
     would become:
       <PropertyUniform ivar="Ambient" shader_var="property.Ambient"> </PropertyUniform>
   For tages that describe values for ivars for vtkProperty:
      <Member name="DiffuseColor" value="0.85 0.05 0.15"> </Member>
    would become
      <Member ivar="DiffuseColor" value="0.85 0.05 0.15"> </Member>
  • When a shader is applied to an object/actor in ParaView that object's actor controls no longer affect the object's position, opacity, etc.
  • The XML settings for a vtkProperty specified in a material file should be reflected in the ParaView gui elements. For example, if the material file defines a color for the object, that color should be the color seen in the ParaView 'display' tab.