Varying variables
[Shaders]

VolumeViz GLSL varying variables. More...

VolumeViz GLSL varying variables.

The following varying variables are set by the predefined vertex shader functions for use in fragment shaders.

• VVizLightingVec : vec3 : Directional light vector in object space.
  The first directional light found in the scene graph is used for this value.
• VVizViewVec : vec3 : Vertex-to-eye vector in object space.
• VVizHalfVec : vec3 : Half vector in object space (VVizViewVec+VVizLightingVec)/2 .