trigger.hpp

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#pragma once
#include "../body.hpp"
 
#include <span>
#include <toast/events/signals.hpp>
#include <toast/world/node_3d.hpp>
#include <vector>
 
namespace physics {

class TOAST_API [[ToastNode, Icon("Area"), Color("Green")]] Trigger : public toast::Node3D {
  friend class Simulator;
 
public:
  signals::Signal<toast::Box<toast::Node3D>> on_enter;
  signals::Signal<toast::Box<toast::Node3D>> on_exit;
 
  [[Reflect]]
  auto getCurrentCollisions() const -> std::vector<toast::Box<toast::Node3D>>;
 
  auto isInside(const toast::Node3D& node) const -> bool;
 
  [[Reflect]]
  auto empty() const -> bool;
 
  [[Reflect]]
  void enableCollider(bool value);
 
  [[Reflect]]
  void includeLayer(int layer, bool value = true);
 
  [[Reflect]]
  void excludeLayer(int layer, bool value = true);
 
  [[Reflect, Layers("excluded"), Name("Layers")]]
  uint32_t included = 2;    // Trigger
 
  [[Reflect, LayersExcluded]]
  uint32_t excluded = 0;

  [[Reflect, Color]]
  glm::vec4 debug_color = glm::vec4(0.0f, 1.0f, 0.251f, 0.5f);

  [[Reflect, Color]]
  glm::vec4 empty_color = glm::vec4(0.5f, 0.5f, 0.5f, 0.5f);
 
private:
  struct Overlap {
    BodyID body;
    toast::Box<toast::Node3D> node;
  };
 
  void begin();
  void end();
  void onDisable();
  void updateOverlaps(std::span<const BodyID> bodies);
  void applyDebugColor();
 
  void updateInspectorMessages() override;
 
  std::vector<Overlap> m_current;
};
 
}