debris_simulation.hpp

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#pragma once
 
#include <glm/glm.hpp>
#include <span>
#include <toast/renderer/async_compute_task.hpp>
 
namespace example {

class DebrisSimulation : public renderer::AsyncComputeTask {
public:
  static constexpr uint32_t k_max_particles = 65536;
 
  DebrisSimulation();

  void spawn(std::span<const glm::vec4> positions, std::span<const glm::vec4> velocities);

  void step(float dt);

  auto readPositions(std::span<glm::vec4> out) -> bool {
    return read(m_positions, out);
  }

  [[nodiscard]]
  auto positionsId() const -> BufferId {
    return m_positions;
  }
 
private:
  struct Params {
    float dt;
    uint32_t count;
  };
 
  BufferId m_positions = 0;
  BufferId m_velocities = 0;
  uint32_t m_count = 0;
};
 
}