formZ SDK | 5.0 API Reference | Project | Modeling | Rendering | Shaders
Description
This function can only be called inside the pixel or pre_render
callback functions when implementing a plugin or script
reflection shader. It retrieves the current value of the
index of refraction parameter. This parameter must have
been declared in the set_parameters callback function
of the same shader via a call to fz_shdr_set_transmission_parm().
Since the index of refraction is constant for a given shader during
a rendering, it should be retrieved in the pre_render function.
The index of refraction value is used as input to the function
, which computes the direction of a ray as
it enters a transmissive material.
Plugin Prototype
void fz_shdr_get_index_of_refraction(
double * | fval ) |
Parameters
fval [Result]
The current value of the index of refraction parameter.
Returns
none
Availability
5.0.0.0
See Also
Function Set
Defined in