Particle system WIP

SHADE_Engine/src/Graphics/MiddleEnd/GlobalData/SHGraphicsPredefinedData.cpp

@@ -59,6 +59,12 @@ namespace SHADE
       {SHPredefinedDescriptorTypes::STATIC_DATA, 0},
       {SHPredefinedDescriptorTypes::CAMERA,      1},
     });
+
+    perSystemData[SHUtilities::ConvertEnum(SystemType::PARTICLE_RENEDERING)].descMappings.AddMappings
+    ({
+      {SHPredefinedDescriptorTypes::STATIC_DATA, 0},
+      {SHPredefinedDescriptorTypes::CAMERA,      1},
+      });
   }
 
   void SHGraphicsPredefinedData::InitDummyPipelineLayouts(Handle<SHVkLogicalDevice> logicalDevice) noexcept
@@ -235,6 +241,12 @@ namespace SHADE
       SHGraphicsPredefinedData::PredefinedDescSetLayoutTypes::STATIC_DATA |
       SHGraphicsPredefinedData::PredefinedDescSetLayoutTypes::CAMERA
     );
+
+    perSystemData[SHUtilities::ConvertEnum(SystemType::PARTICLE_RENEDERING)].descSetLayouts = GetPredefinedDescSetLayouts
+    (
+      SHGraphicsPredefinedData::PredefinedDescSetLayoutTypes::STATIC_DATA |
+      SHGraphicsPredefinedData::PredefinedDescSetLayoutTypes::CAMERA
+    );
   }
 
   void SHGraphicsPredefinedData::InitPredefinedVertexInputState(void) noexcept

SHADE_Engine/src/Graphics/MiddleEnd/GlobalData/SHGraphicsPredefinedData.h

@@ -39,6 +39,7 @@ namespace SHADE
       TEXT_RENDERING,
       RENDER_GRAPH_NODE_COMPUTE,
       TRAJECTORY_RENDERING,
+      PARTICLE_RENEDERING,
       NUM_TYPES
     };
     static constexpr int SYSTEM_TYPE_COUNT = static_cast<int>(SystemType::NUM_TYPES);

SHADE_Engine/src/Graphics/MiddleEnd/Particles/SHParticleEmitterComponent.cpp

@@ -0,0 +1,23 @@
+#include "SHParticleEmitterComponent.h"
+
+namespace SHADE
+{
+  
+  void SHParticleEmitterComponent::OnCreate(void)
+  {
+    timeBeforeEmission = emissionInterval;
+
+    // initialize all buffers here
+  }
+
+  void SHParticleEmitterComponent::OnDestroy(void)
+  {
+
+  }
+
+  void SHParticleEmitterComponent::Emit(void) noexcept
+  {
+
+  }
+
+}

SHADE_Engine/src/Graphics/MiddleEnd/Particles/SHParticleEmitterComponent.h

@@ -0,0 +1,95 @@
+#pragma once
+
+#include "Resource/SHHandle.h"
+#include "Math/Vector/SHVec4.h"
+#include "ECS_Base/Components/SHComponent.h"
+
+namespace SHADE
+{
+  class SHVkBuffer;
+
+  class SHParticleEmitterComponent : public SHComponent
+  {
+  private:
+    struct GPUEmitterStruct
+    {
+      //! Minimum emitting angular range
+      SHVec4 angularMin;
+
+      //! Maximum emitting angular range
+      SHVec4 angularMax;
+
+      //! Spawn lifetime and size range (min and max)
+      SHVec4 lifeAndSizeRange;
+    };
+
+    struct GPUParticleStruct
+    {
+      //! Position of the particle
+      SHVec4 position;
+
+      //! Rotation of the particle
+      SHVec4 rotation;
+
+      //! Velocity of the particle
+      SHVec4 velocity;
+
+      //! Acceleration of the particle
+      SHVec4 acceleration;
+
+      //! Scale of the texture
+      float scale;
+
+      //! Life of the particle
+      float life;
+
+      //! life decay rate
+      float lifeDecayRate;
+
+      //! Texture into the desc array that the particle is using
+      uint32_t textureIndex;
+    };
+
+    //! Max number of particles of this emitter
+    uint32_t maxParticles;
+
+    //! emission count per emit
+    uint32_t emissionCount;
+
+    //! emission interval of the emitter
+    float emissionInterval;
+
+    //! Counter that decreases to 0 from emissionInterval. When 0, emit particles.
+    float timeBeforeEmission;
+
+    //! Data for the emitter
+    Handle<SHVkBuffer> emitterData;
+
+    //! GPU Particle data
+    Handle<SHVkBuffer> particleData;
+
+    //! Freelist data 
+    Handle<SHVkBuffer> freelistData;
+
+    //! Freelist data 
+    Handle<SHVkBuffer> indicesData;
+
+    //! Freelist data 
+    Handle<SHVkBuffer> drawCallData;
+
+    //! Emitter's data on the CPU side. To be copied to GPU.
+    GPUEmitterStruct emitterDataCPU;
+
+    //! If passive, emitter emits particles based on timer above. 
+    bool isPassive;
+
+  public:
+    void OnCreate(void) override final;
+    void OnDestroy(void) override final;
+
+    void Emit (void) noexcept;
+
+    friend class SHParticleSubSystem;
+
+  };
+}

SHADE_Engine/src/Graphics/MiddleEnd/Particles/SHParticleSubSustem.cpp

@@ -0,0 +1,84 @@
+#include "SHpch.h"
+#include "SHParticleSubSustem.h"
+#include "Graphics/Pipeline/SHPipelineLayoutParams.h"
+#include "Graphics/MiddleEnd/GlobalData/SHGraphicsPredefinedData.h"
+#include "Graphics/Devices/SHVkLogicalDevice.h"
+#include "Graphics/MiddleEnd/Particles/SHParticleEmitterComponent.h"
+#include "ECS_Base/Managers/SHComponentManager.h"
+
+namespace SHADE
+{
+  
+  void SHParticleSubSystem::Init(Handle<SHVkLogicalDevice> device, Handle<SHVkRenderpass> compatibleRenderpass, Handle<SHSubpass> subpass, Handle<SHVkShaderModule> VS, Handle<SHVkShaderModule> FS, Handle<SHVkShaderModule> emitCS, Handle<SHVkShaderModule> defaultUpdateCS) noexcept
+  {
+    /*-----------------------------------------------------------------------*/
+    /* INITIALIZE ALL PIPELINES                                              */
+    /*-----------------------------------------------------------------------*/
+    SHPipelineLayoutParams plParams
+    {
+      .shaderModules = {VS, FS},
+      .predefinedDescSetLayouts = SHGraphicsPredefinedData::GetSystemData(SHGraphicsPredefinedData::SystemType::PARTICLE_RENEDERING).descSetLayouts
+    };
+
+    renderingPipelineData.pipelineLayout = logicalDevice->CreatePipelineLayout(plParams);
+    renderingPipelineData.pipeline = logicalDevice->CreateGraphicsPipeline(renderingPipelineData.pipelineLayout, nullptr, compatibleRenderpass, subpass);
+
+    SHPipelineLayoutParams emitPlParams
+    {
+      .shaderModules = {emitCS},
+      .predefinedDescSetLayouts = SHGraphicsPredefinedData::GetSystemData(SHGraphicsPredefinedData::SystemType::PARTICLE_RENEDERING).descSetLayouts
+    };
+
+    emittingPipelineData.pipelineLayout = logicalDevice->CreatePipelineLayout(emitPlParams);
+    emittingPipelineData.pipeline = logicalDevice->CreateComputePipeline(emittingPipelineData.pipelineLayout);
+
+    SHPipelineLayoutParams defaultUpdatePlParams
+    {
+      .shaderModules = {defaultUpdateCS},
+      .predefinedDescSetLayouts = SHGraphicsPredefinedData::GetSystemData(SHGraphicsPredefinedData::SystemType::PARTICLE_RENEDERING).descSetLayouts
+    };
+
+    defaultUpdatePipelineData.pipelineLayout = logicalDevice->CreatePipelineLayout(defaultUpdatePlParams);
+    defaultUpdatePipelineData.pipeline = logicalDevice->CreateComputePipeline(defaultUpdatePipelineData.pipelineLayout);
+
+    /*-----------------------------------------------------------------------*/
+    /* OTHER INITIALIZATION                                                  */
+    /*-----------------------------------------------------------------------*/
+    SHComponentManager::CreateComponentSparseSet<SHParticleEmitterComponent>();
+  }
+
+  void SHParticleSubSystem::Run(Handle<SHVkCommandBuffer> cmdBuffer, uint32_t frameIndex, float dt) noexcept
+  {
+    auto& emitters = SHComponentManager::GetDense<SHParticleEmitterComponent>();
+
+    for (auto& emitter : emitters)
+    {
+    	// Emit emitters here if there are ready to be emitted
+      if (emitter.isPassive)
+      {
+        // decrement emission timer
+        emitter.timeBeforeEmission -= dt;
+
+        // Check if time to emit
+        if (emitter.timeBeforeEmission <= 0.0f)
+        {
+          // reset timer
+          emitter.timeBeforeEmission = emitter.emissionInterval;
+
+          // Call dispatch here to emit particles
+        }
+      }
+    }
+  }
+
+  void SHParticleSubSystem::Render(Handle<SHVkCommandBuffer> cmdBuffer, Handle<SHRenderer> renderer, uint32_t frameIndex) noexcept
+  {
+    auto& emitters = SHComponentManager::GetDense<SHParticleEmitterComponent>();
+  }
+
+  void SHParticleSubSystem::Exit(void) noexcept
+  {
+
+  }
+
+}

SHADE_Engine/src/Graphics/MiddleEnd/Particles/SHParticleSubSustem.h

@@ -25,14 +25,37 @@ namespace SHADE
   class SHParticleSubSystem
   {
   private:
+    // To hold data for a pipeline and pipeline layout.
+    // We want this here because particles require 3 pipeline sets:
+    // - Rendering
+    // - Emit Compute
+    // - Update Compute
+    struct PipelineData
+    {
+      //! Pipeline
+      Handle<SHVkPipeline> pipeline;
 
+      //! Pipeline layout for pipeline creation
+      Handle<SHVkPipelineLayout> pipelineLayout;
+    };
+
+    //! Logical device for creation and destruction
     Handle<SHVkLogicalDevice> logicalDevice;
 
+    //! Pipeline data for rendering particles
+    PipelineData renderingPipelineData;
+
+    //! Pipeline data for emitting particles
+    PipelineData emittingPipelineData;
+
+    //! Pipeline data for updating particles
+    PipelineData defaultUpdatePipelineData;
+
 
   public:
-    void Init(Handle<SHVkLogicalDevice> device, Handle<SHVkRenderpass> compatibleRenderpass, Handle<SHSubpass> subpass) noexcept;
+    void Init(Handle<SHVkLogicalDevice> device, Handle<SHVkRenderpass> compatibleRenderpass, Handle<SHSubpass> subpass, Handle<SHVkShaderModule> VS, Handle<SHVkShaderModule> FS, Handle<SHVkShaderModule> emitCS, Handle<SHVkShaderModule> defaultUpdateCS) noexcept;
 
-    void Run(uint32_t frameIndex) noexcept;
+    void Run(Handle<SHVkCommandBuffer> cmdBuffer, uint32_t frameIndex, float dt) noexcept;
 
     void Render(Handle<SHVkCommandBuffer> cmdBuffer, Handle<SHRenderer> renderer, uint32_t frameIndex) noexcept;
     void Exit(void) noexcept;

SHADE_Engine/src/Graphics/MiddleEnd/Particles/SHParticleSubSystem.cpp

@@ -1,7 +0,0 @@
-#include "SHpch.h"
-#include "SHParticleSubSustem.h"
-
-namespace SHADE
-{
-  
-}