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vector eval_bsdf(bsdf b, vector viewer, vector light, ...)
vector eval_bsdf(bsdf b, vector viewer, vector light, int mask, ...)
vector eval_bsdf(bsdf b, vector viewer, vector light, float &pdf, int mask, ...)
vector eval_bsdf(bsdf b, vector viewer, vector light, vector normal, ...)
vector eval_bsdf(bsdf b, vector viewer, vector light, vector normal, int mask, ...)
vector eval_bsdf(bsdf b, vector viewer, vector light, vector normal, float &pdf, int mask, ...)
b
BSDF to evaluate.
viewer
Vector toward viewer.
light
Vector toward light.
normal
Surface normal.
mask
A bitmask indicating which types of shading component bounces to evaluate.
See bouncemask for information on component label bitmasks.
&pdf
The function overwrites this variable with the computed PDF for the given directions, scaled by the albedo.
Variadic arguments
The eval_bsdf function passes any extra "name", value argument pairs to the BSDF being
evaluated. For custom BSDFs these keyword arguments are bound to shader
arguments (e.g. indicating whether the BSDF is being evaluated for direct or
indirect illumination). It’s also possible for a BSDF to pass information back
to eval_bsdf. To indicate that a keyword argument value should be imported
from the BSDF prefix the keyword with "import:"
Examples
v = eval_bsdf(F, inI, dir, "direct", 0, // Specify indirect illumination "import:sssmfp", sssmfp, // Read the exported sssmfp parameter ... );
| See also | |
| bsdf | |
| labels | |
| pbr |
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