contact_events.hpp

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#pragma once
 
#include "manifold.hpp"
 
#include <algorithm>
#include <array>
#include <cstddef>
#include <toast/events/event.hpp>
#include <toast/export.hpp>
 
namespace event {
 
struct ContactEventData {
  physics::BroadPhasePair pair;
  glm::vec3 normal = {};
  std::array<physics::ContactPoint, 4> contacts = {};
  uint8_t contact_count = 0;
 
  explicit ContactEventData(const physics::Manifold& manifold)
      : pair(manifold.pair),
        normal(manifold.normal),
        contact_count(static_cast<uint8_t>(std::min<size_t>(manifold.contact_count, contacts.size()))) {
    const size_t count = contact_count;
    for (size_t index = 0; index < count; ++index) {
      contacts[index] = manifold.contacts[index];
    }
  }
};
 
struct TOAST_API ContactBegin : Event<ContactBegin> {
  explicit ContactBegin(const physics::Manifold& manifold) : contact(manifold) { }
 
  ContactEventData contact;
};
 
struct TOAST_API ContactPersist : Event<ContactPersist> {
  explicit ContactPersist(const physics::Manifold& manifold) : contact(manifold) { }
 
  ContactEventData contact;
};
 
struct TOAST_API ContactEnd : Event<ContactEnd> {
  explicit ContactEnd(physics::BroadPhasePair pair) : pair(pair) { }
 
  physics::BroadPhasePair pair;
};
 
}