@brief A helper function setup the result of intersection. @param tri_simd The triangle data structure that has 4/8 triangles. @param ray

8.0f bears no physical law, it is purely just to increase the probability to avoid fireflies. Microfacet specular reflection is easily the source of f

@brief Dielectric fresnel. @param cosI Cosine of the angle between the incident direction and normal. It could be negative, meaning the ray

evaluate value from sky

Flush the data into StatsSummary

generate sample in two dimension

@brief Get the flag of this scattering event. @return The current flag of this scattering event.

@brief Get targe image resolution

@brief Get current position. Ideally, IStreamBase might need to have this interface too. But it is not currently needed.

It is not a global variable because the order of intialization won't be correct if it were one. Static variable in a function will gets intialized the

Intern string

inverse of the matrix

@brief If the render context is initialized

@brief Whether the color is valid. @return Whether the color contains Nan or Inf

get the number of lights

load image file

@brief Whether the integrater need final update, light tracing and bdpt will need it

Preprocess

@briec Construct a SORT ray from an Embree ray

set the color

@brief Set primitive. @param p Primitive list holding all primitives in the node.

@brief Set length along x axis of the quad. @param x Size along x axis.

@brief Set length along y axis of the quad. @param y Size along y axis.

sampling a cone uniformly para 'u' : a canonical random variable para 'v' : a canonical random variable

@brief Helper function that implements the core algorithm of ray line intersection. @param ray Ray to be tested against. @param ray_simd