feat: state manager

1 files changed, 56 insertions, 0 deletions

diff --git a/src/states/simulation_state.h b/src/states/simulation_state.h
new file mode 100644
index 0000000..a0d9e73
--- /dev/null
+++ b/src/states/simulation_state.h
@@ -0,0 +1,56 @@
+#pragma once
+
+#include "core/state.h"
+#include "core/event.h"
+#include "core/camera.h"
+#include "core/log.h"
+
+#include "rendering/vertex_array.h"
+#include "rendering/vertex_buffer.h"
+#include "rendering/index_buffer.h"
+#include "rendering/shader.h"
+#include "rendering/texture.h"
+
+namespace Donut
+{
+    class SimulationState
+        : public State
+    {
+    public:
+        ~SimulationState() = default;
+        
+        void on_enter()                 override;
+        void on_exit()                  override;
+        void on_update(float delta_time) override;
+        void on_render()                override;
+        void on_event(Event& event)     override;
+    private:
+        void handle_key_input(float delta_time);
+        void update_texture();
+    private:
+        std::unique_ptr<Camera> m_camera;
+        
+        std::shared_ptr<VertexArray>  m_vertex_array;
+        std::shared_ptr<VertexBuffer> m_vertex_buffer;
+        std::shared_ptr<IndexBuffer>  m_index_buffer;
+        std::shared_ptr<Shader>       m_shader;
+        std::shared_ptr<Texture2D>    m_texture;
+        
+        std::shared_ptr<Shader>    m_compute_shader;
+        std::shared_ptr<Texture2D> m_processed_texture;
+        
+        float m_compute_brightness = 0.0f;
+        float m_compute_contrast   = 1.0f;
+        float m_compute_saturation = 1.0f;
+        bool  m_use_compute_shader  = true;
+        
+        bool  m_keys[1024]    = { false };
+        bool  m_first_mouse    = true;
+        float m_last_x         = 0.0f;
+        float m_last_y         = 0.0f;
+        float m_delta_time     = 0.0f;
+        float m_last_frame     = 0.0f;
+        bool  m_mouse_dragging = false;
+        float m_texture_time   = 0.0f;
+    };
+};