* Function that transforms/packs this material to the version that the GPU is going to use */

* Returns the relative IOR as "A /B" * with A the IOR of the specular layer * and B the IOR of the layer (or medium) above the specular layer * *

* This function samples a 3D texture given in the 'texture' parameter * This parameter should be an oroTextureObject_t on the GPU, not a * pointer '

combined JPEG 'receive' and JPEG 'extend', since baseline always extends everything it receives.

returns 0..31 for the highest set bit

mallocs with size overflow checking

extract an arbitrarily-aligned N-bit value (N=bits) from v, and then make it 8-bits long and fractionally extend it to full full range.

returns STBI_rgb or whatever, 0 on error

* Overload if you already the hash grid cell index */

* Returns the PDF of the Torrance Sparrow BRDF 'FDG / 4.NoL.NoV' with the * GGX as the microfacet distribution * * 'incident_light_direction_is_fro

* Returns true if a hit was found, false otherwise */

Return sum of tile blocks. 0 = error

-1 = error

* Reference: [WORLD-SPACE SPATIOTEMPORAL RESERVOIR REUSE FOR RAY-TRACED GLOBAL ILLUMINATION, Boisse, 2021] */

* Returns the estimated probability that a ray between the two given world points * is going to be unoccluded (i.e. the two points are mutually vis

* Schlick's approximation for dielectric fresnel reflectance */

* Returns the phi angle of a direction given in a canonical frame with Z up */