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light.cpp
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light.cpp
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#include "light.h"
Light::Light(LightType type, nlohmann::json config) {
switch (type) {
case LightType::POINT_LIGHT:
this->position = Vector3f(config["location"][0], config["location"][1], config["location"][2]);
break;
case LightType::DIRECTIONAL_LIGHT:
this->direction = Vector3f(config["direction"][0], config["direction"][1], config["direction"][2]);
break;
case LightType::AREA_LIGHT:
// TODO: Implement this
break;
default:
std::cout << "WARNING: Invalid light type detected";
break;
}
this->radiance = Vector3f(config["radiance"][0], config["radiance"][1], config["radiance"][2]);
this->type = type;
}
std::pair<Vector3f, LightSample> Light::sample(Interaction *si) {
LightSample ls;
memset(&ls, 0, sizeof(ls));
Vector3f radiance;
switch (type) {
case LightType::POINT_LIGHT:
ls.wo = (position - si->p);
ls.d = ls.wo.Length();
ls.wo = Normalize(ls.wo);
radiance = (1.f / (ls.d * ls.d)) * this->radiance;
break;
case LightType::DIRECTIONAL_LIGHT:
ls.wo = Normalize(direction);
ls.d = 1e10;
radiance = this->radiance;
break;
case LightType::AREA_LIGHT:
// TODO: Implement this
break;
}
return { radiance, ls };
}
Interaction Light::intersectLight(Ray *ray) {
Interaction si;
memset(&si, 0, sizeof(si));
if (type == LightType::AREA_LIGHT) {
// TODO: Implement this
}
return si;
}