VEX contexts
Unlike C or C++, VEX has different “contexts” for which you write programs. These contexts define how the function is to be used.
For example, one context is the “surface” context. Functions written in this context are used to calculate the color(s) of a surface during rendering. The global variables and functions provided for each context are slightly different. Subtopics
subtopics
Shading contexts
shading-contexts
See common shading context features for information specific to the shading contexts.
- displace Define a displacement shader with a program that moves a point on a surface before the surface is rendered.
- fog Deprecated. Define a fog shader with a program that modifies the Cf, Of, or Af values to simulate atmospheric effects.
- light Define a light shader with a program called from surface or fog shaders to calculate the illumination of a surface.
- shadow Define a shadow shader by defining a program that’s called from surface or fog shaders to calculate the occlusion on a surface from a light source.
- surface Define a surface shader with a program that sets the final color, opacity, and alpha of a surface being rendered.
Other contexts
other-contexts
- cvex
- chop Define a custom CHOP operator with a program that edits channel values.
- /vex/contexts/cop.html
Obsolete contexts