* Samples a microfacet normal from the distribution of visible normals of * the GGX normal function distribution and reflects the given view directio

returns 1 if the product is valid, 0 on overflow. negative factors are considered invalid.

FLIP_ENABLE_CUDA

* Updates the representative point and normal (and other data) of the cell at the given shading point */

* Returns the length of the longest extent of the bounding box */

* Clamps some of the parameters of the material to avoid edge cases like NaNs * during rendering (i.e. numerical instabilities) */

* Refracts a ray about a normal. This function requires that dot(ray_direction, surface_normal) > 0 i.e. * ray_direction and surface_normal are in th

clean up the temporary component buffers

decode a jpeg huffman value from the bitstream

after a restart interval, stbi__jpeg_reset the entropy decoder and the dc prediction

initialize a callback-based context

* References: * * [1] [A Practical Extension to Microfacet Theory for the Modeling of Varying Iridescence, Belcour, Barla, 2017] https://belcour.git

Returns whether this was successfully opened.

* Lambda function for the denominator of the G1 Smith masking/shadowing functions */

* Samples a microfacet normal from the distribution of visible normals of * the GGX normal function distribution */

* 'last_primitive_hit_index' is the index of the triangle we're currently sitting * on and that we're shooting a ray from. This is used to avoid sel

* Rotation of the basis around the normal by 'basis_rotation' radians */

* Reference: * * [1] [Lambertian Reflection Without Tangents], Edd Biddulph https://fizzer.neocities.org/lambertnotangent * * The sampled direct

* If you want to check whether you should use the features of the adaptive directional spatial * reuse, prefer using this function rather than direc

* This function expects the given direction to be in world space i.e. * the direction is already rotated by the envmap rotation matrix */

* Returns true if in shadow, false otherwise. * * Also, if a hit was found, outputs the emission of the material at the hit point in 'out_hit_emiss

* Returns a camera ray for pixel (x, y) and the given render solution */