Transform.hpp

#pragma once
 
#include <cstdint>
#include <nlohmann/json.hpp>
 
#include <Registry.hpp>
 
#include "../utils/vec2.hpp"
 
namespace component {
struct Transform {
  float rotation;       
  utils::vec2 position; 
  utils::vec2 scale;    
};
 
inline void transformFromJson(rtk::ecs::Registry &reg, std::size_t entity,
                              const nlohmann::json &data) {
  component::Transform transform{};
 
  if (data.contains("position")) {
    transform.position.x = data["position"].value("x", 0.0f);
    transform.position.y = data["position"].value("y", 0.0f);
  } else {
    transform.position.x = data.value("x", 0.0f);
    transform.position.y = data.value("y", 0.0f);
  }
 
  transform.rotation = data.value("rotation", 0.0f);
 
  if (data.contains("scale")) {
    transform.scale.x = data["scale"].value("x", 1.0f);
    transform.scale.y = data["scale"].value("y", 1.0f);
  } else {
    transform.scale.x = 1.0f;
    transform.scale.y = 1.0f;
  }
 
  reg.get_components<component::Transform>().insert_at(entity, transform);
}
 
} // namespace component