Misaki
bfc94f0008
Added new function signatures in `assimp-vc143-mt.lib` for improved logging, parsing, and vector operations. Added new metadata and configuration information in `assimp-vc143-mt.dll` for versioning and licensing compliance. Added Sobol sequence generation in `Sobol.c` for quasi-random sampling. Added window message handling in `Window.c` for rendering graphics. Added ray-triangle intersection tests in `RayIntersection.c` for collision detection. Added functions for loading mesh data in `Mesh.c` to support 3D model import. Added functions for managing triangle collections in `Triangle.c` to enhance geometric data handling. Added light evaluation functions in `LightEvaluation.c` and `SkyLight.c` for realistic rendering. Added sampling and evaluation functions for simple lit materials in `SimpleLit.c`. Changed various header files to include copyright and licensing information. Changed existing functions in multiple files to improve performance and clarity. Removed unused code in several files to streamline the library.
45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
#include "Lighting/SkyLight.h"
|
|
#include "Algorithm/BSDF.h"
|
|
#include "Algorithm/RayIntersection.h"
|
|
#include "Material/Material.h"
|
|
|
|
vec3s evaluate_bsdf_const_sky(const void* data, const light_shading_context_t* context, sobol_state_t* sobol_state)
|
|
{
|
|
const constant_sky_data_t sky_data = *(const constant_sky_data_t*)data;
|
|
|
|
if (context == NULL)
|
|
{
|
|
return sky_data.color; // No context, return the sky color directly.
|
|
}
|
|
|
|
vec3s wi = random_cosine_direction(context->normal, sobol_state);
|
|
float pdf = pdf_cosine_weighted_hemisphere(context->normal, wi);
|
|
|
|
ray_t shadow_ray = {
|
|
.origin = glms_vec3_add(context->hit_point, glms_vec3_scale(context->normal, 0.001f)),
|
|
.direction = wi,
|
|
};
|
|
|
|
hit_result_t shadow_hit = ray_intersect_any(context->triangles, shadow_ray);
|
|
if (shadow_hit.hit)
|
|
{
|
|
return glms_vec3_zero(); // Skip if the ray hits something
|
|
}
|
|
|
|
shading_context_t shading_context = {
|
|
.normal = context->normal,
|
|
.wi = wi,
|
|
.wo = glms_vec3_negate(context->wo)
|
|
};
|
|
|
|
vec3s bsdf = evaluate_material_bsdf(context->material, &shading_context);
|
|
bsdf = glms_vec3_mul(bsdf, sky_data.color);
|
|
float cos_theta = fmaxf(glms_vec3_dot(wi, context->normal), 0.0f);
|
|
|
|
float pdf_bsdf = sample_material_bsdf_pdf(context->material, shading_context.normal, shading_context.wo, shading_context.wi);
|
|
float weight = power_heuristic(pdf, pdf_bsdf);
|
|
|
|
vec3s env_contrib = glms_vec3_scale(glms_vec3_mul(context->throughput, bsdf), cos_theta / pdf);
|
|
return glms_vec3_scale(env_contrib, weight);
|
|
}
|