physics_system.h

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#pragma once
#include <base/basetypes.hpp>
#include <context/context.hpp>
 
#include <engine/physics/backend/bullet/bullet_backend.h>
 
namespace unravel
{
 
class physics_system
{
public:
    using backend_type = bullet_backend; 
 
 
    auto init(rtti::context& ctx) -> bool;
 
    auto deinit(rtti::context& ctx) -> bool;
 
    static void on_create_component(entt::registry& r, entt::entity e);
 
    static void on_destroy_component(entt::registry& r, entt::entity e);
 
    static void apply_explosion_force(physics_component& comp,
                                      float explosion_force,
                                      const math::vec3& explosion_position,
                                      float explosion_radius,
                                      float upwards_modifier,
                                      force_mode mode);
 
    static void apply_force(physics_component& comp, const math::vec3& force, force_mode mode);
 
    static void apply_torque(physics_component& comp, const math::vec3& torque, force_mode mode);
 
    static void clear_kinematic_velocities(physics_component& comp);
 
    auto ray_cast(const math::vec3& origin,
                  const math::vec3& direction,
                  float max_distance,
                  int layer_mask,
                  bool query_sensors) const -> hpp::optional<raycast_hit>;
 
    auto ray_cast_all(const math::vec3& origin,
                      const math::vec3& direction,
                      float max_distance,
                      int layer_mask,
                      bool query_sensors) const -> physics_vector<raycast_hit>;
 
    auto sphere_cast(const math::vec3& origin,
                     const math::vec3& direction,
                     float radius,
                     float max_distance,
                     int layer_mask,
                     bool query_sensors) const -> hpp::optional<raycast_hit>;
 
    auto sphere_cast_all(const math::vec3& origin,
                         const math::vec3& direction,
                         float radius,
                         float max_distance,
                         int layer_mask,
                         bool query_sensors) const -> physics_vector<raycast_hit>;
 
    auto sphere_overlap(const math::vec3& origin, float radius, int layer_mask, bool query_sensors) const
        -> physics_vector<entt::entity>;
 
private:
    void on_frame_update(rtti::context& ctx, delta_t dt);
 
    void on_play_begin(rtti::context& ctx);
 
    void on_play_end(rtti::context& ctx);
 
    void on_pause(rtti::context& ctx);
 
    void on_resume(rtti::context& ctx);
 
    void on_skip_next_frame(rtti::context& ctx);
 
    std::shared_ptr<int> sentinel_ = std::make_shared<int>(0); 
 
    backend_type backend_; 
};
 
} // namespace unravel