Function SampleAreaLight

BakingLab/PathTracer.cpp:165–174

Calculates diffuse and specular contribution from the area light, given a 2D random sample point representing a location on the surface of the light

// Calculates diffuse and specular contribution from the area light, given a 2D random sample point
// representing a location on the surface of the light
Float3 SampleAreaLight(const Float3& position, const Float3& normal, RTCScene scene,
                       const Float3& diffuseAlbedo, const Float3& cameraPos,
                       bool includeSpecular, Float3 specAlbedo, float roughness,
                       float u1, float u2, Float3& irradiance)
{
    Float3 lightPos = Float3(AppSettings::AreaLightX, AppSettings::AreaLightY, AppSettings::AreaLightZ);
    return SampleSphericalAreaLight(position, normal, scene, diffuseAlbedo, cameraPos, includeSpecular,
                                    specAlbedo, roughness, u1, u2, AppSettings::AreaLightSize,
                                    lightPos, AppSettings::AreaLightColor.Value() * FP16Scale, irradiance);
}

// Checks to see if a ray intersects with the area light
static float AreaLightIntersection(const Float3& rayStart, const Float3& rayDir, float tStart, float tEnd)