1 files changed, 79 insertions, 0 deletions
diff --git a/source/blender/simulations/bparticles/simulation_state.hpp b/source/blender/simulations/bparticles/simulation_state.hpp
new file mode 100644
index 00000000000..1a686afcd52
--- /dev/null
+++ b/source/blender/simulations/bparticles/simulation_state.hpp
@@ -0,0 +1,79 @@
+#pragma once
+
+#include "BLI_float_interval.h"
+
+#include "particles_state.hpp"
+#include "world_state.hpp"
+
+namespace BParticles {
+
+using BLI::FloatInterval;
+
+class SimulationTimeState {
+ private:
+  bool m_is_updating = false;
+  float m_simulation_time = 0.0f;
+  float m_update_start_time = 0.0f;
+  float m_update_duration = 0.0f;
+  uint m_current_update_index = 0;
+
+ public:
+  bool is_updating() const
+  {
+    return m_is_updating;
+  }
+
+  FloatInterval current_update_time() const
+  {
+    BLI_assert(m_is_updating);
+    return FloatInterval(m_update_start_time, m_update_duration);
+  }
+
+  uint current_update_index() const
+  {
+    BLI_assert(m_is_updating);
+    return m_current_update_index;
+  }
+
+  void start_update(float time_step)
+  {
+    BLI_assert(time_step >= 0);
+    BLI_assert(!m_is_updating);
+    m_is_updating = true;
+    m_update_start_time = m_simulation_time;
+    m_update_duration = time_step;
+    m_current_update_index++;
+  }
+
+  void end_update()
+  {
+    BLI_assert(m_is_updating);
+    m_is_updating = false;
+    m_simulation_time = m_update_start_time + m_update_duration;
+  }
+};
+
+class SimulationState {
+ private:
+  ParticlesState m_particles;
+  WorldState m_world;
+  SimulationTimeState m_time_state;
+
+ public:
+  ParticlesState &particles()
+  {
+    return m_particles;
+  }
+
+  WorldState &world()
+  {
+    return m_world;
+  }
+
+  SimulationTimeState &time()
+  {
+    return m_time_state;
+  }
+};
+
+}  // namespace BParticles