add light parser

src/Light.cc

@@ -7,3 +7,7 @@ void Light::setTransform(const Matrix4f &transform) {
 void Light::setGridSize(unsigned int gridSize) { this->gridSize = gridSize; }
 
 void Light::setUseCenter(bool useCenter) { this->useCenter = useCenter; }
+
+void PointLight::illumination() const {}
+
+void AreaLight::illumination() const {}

src/Parser.cc

@@ -1,5 +1,6 @@
 #include "Parser.h"
 #include "Geometry.h"
+#include "Light.h"
 
 #include <Eigen/Core>
 #include <string>
@@ -97,3 +98,37 @@ Rectangle *Parser::getRectangle(const nlohmann::json &j, float ka, float kd,
 
   return new Rectangle(ka, kd, ks, ca, cd, cs, pc, corners);
 }
+
+Light *Parser::getLight(const nlohmann::json &j) {
+  Vector3f id = getVector3f(j["id"]);
+  Vector3f is = getVector3f(j["is"]);
+
+  Light *l;
+  if (j["type"].get<string>().compare("point"))
+    l = getAreaLight(j, id, is);
+  else
+    l = getPointLight(j, id, is);
+
+  if (j.contains("transform")) {
+    l->setTransform(getTransform(j["transform"]));
+  }
+
+  l->setGridSize(j.value("n", 0));
+  l->setUseCenter(j.value("usecenter", false));
+
+  return l;
+}
+
+AreaLight *Parser::getAreaLight(const nlohmann::json &j, const Vector3f &id,
+                                const Vector3f &is) {
+  Matrix<float, 3, 4> corners = getCorners(j);
+
+  return new AreaLight(id, is, corners);
+}
+
+PointLight *Parser::getPointLight(const nlohmann::json &j, const Vector3f &id,
+                                  const Vector3f &is) {
+  Vector3f center = getVector3f(j["centre"]);
+
+  return new PointLight(id, is, center);
+}

src/Parser.h

@@ -14,8 +14,10 @@ public:
   static Scene *getScene(const nlohmann::json &);
 
 private:
-  static PointLight *getPointLight(const nlohmann::json &);
-  static AreaLight *getAreaLight(const nlohmann::json &);
+  static PointLight *getPointLight(const nlohmann::json &, const Vector3f &,
+                                   const Vector3f &);
+  static AreaLight *getAreaLight(const nlohmann::json &, const Vector3f &,
+                                 const Vector3f &);
   static Rectangle *getRectangle(const nlohmann::json &, float, float, float,
                                  const Vector3f &, const Vector3f &,
                                  const Vector3f &, float);

src/RayTracer.cc

@@ -12,6 +12,9 @@ void RayTracer::parse() {
 
   for (auto i = json["geometry"].begin(); i != json["geometry"].end(); ++i)
     geometries.push_back(Parser::getGeometry(*i));
+
+  for (auto i = json["light"].begin(); i != json["light"].end(); ++i)
+    lights.push_back(Parser::getLight(*i));
 }
 
 void RayTracer::render() {}