Particles WIP

Assets/Shaders/ParticleEmit_CS.glsl

@@ -135,7 +135,7 @@ void main()
 
   // Set size of particle
   particle.scaleAndDecay.x = emitterParams.data.lifeAndSizeRange.z;
-  particle.scaleAndDecay.y = emitterParams.data.lifeAndSizeRange.z;
+  particle.scaleAndDecay.z = emitterParams.data.lifeAndSizeRange.z;
 
   particle.rotation = vec4 (5.0f);
   particle.acceleration = vec4 (0.01f);

Assets/Shaders/ParticleUpdate_CS.glsl

@@ -132,5 +132,7 @@ void main()
     outputParticles.data[index] = particle;
     uint drawIndex = atomicAdd (indirectArgs.instanceCount, 1);
     indices[drawIndex] = index;
+
+    // indirectArgs.instanceCount = 1;
   }
 }

Assets/Shaders/Particle_VS.glsl

@@ -78,16 +78,17 @@ void main()
   vec2 particleScaleData = particle.scaleAndDecay.xz; // x and y
 
 	mat4 localModel = mat4 (1.0f);
-  localModel[0][0] = particleScaleData.x;
+  localModel[0][0] = 1.0f;
-  localModel[1][1] = particleScaleData.y;
+  localModel[1][1] = 1.0f;
 
   mat4 rotate = mat4(1.0f);
 	rotate[0][0] = cos(angle);
   rotate[0][1] = sin(angle);
   rotate[1][0] = -sin(angle);
   rotate[1][1] = cos(angle);
-	localModel = rotate * localModel;
+	// localModel = rotate * localModel;
 
 	localModel[3] = vec4 (particle.position.xyz, 1.0f);
   gl_Position = cameraData.vpMat * localModel * vec4(vertexPos, 1.0f);
+  // gl_Position =  vec4(vertexPos, 1.0f);
 }

SHADE_Engine/src/Graphics/Commands/SHVkCommandBuffer.cpp

@@ -462,7 +462,7 @@ namespace SHADE
       vkCommandBuffer.drawIndexedIndirect(indirectDrawData->GetVkBuffer(), 0, drawCount, sizeof(vk::DrawIndexedIndirectCommand));
   }
 
-  void SHVkCommandBuffer::DrawMultiIndirect(Handle<SHVkBuffer> indirectDrawData, uint32_t drawCount)
+  void SHVkCommandBuffer::DrawMultiIndirect(Handle<SHVkBuffer> indirectDrawData, uint32_t drawCount, uint32_t offset/* = 0*/)
   {
     if (cmdBufferState != SH_CMD_BUFFER_STATE::RECORDING)
     {
@@ -471,7 +471,7 @@ namespace SHADE
     }
 
     if (indirectDrawData)
-      vkCommandBuffer.drawIndirect(indirectDrawData->GetVkBuffer(), 0, drawCount, sizeof(vk::DrawIndexedIndirectCommand));
+      vkCommandBuffer.drawIndirect(indirectDrawData->GetVkBuffer(), offset, drawCount, sizeof(vk::DrawIndirectCommand));
 
   }
 

SHADE_Engine/src/Graphics/Commands/SHVkCommandBuffer.h

@@ -131,7 +131,7 @@ namespace SHADE
     void DrawArrays                (uint32_t vertexCount, uint32_t instanceCount, uint32_t firstVertex, uint32_t firstInstance) const noexcept;
     void DrawIndexed               (uint32_t indexCount, uint32_t firstIndex, uint32_t vertexOffset) const noexcept;
     void DrawMultiIndirectIndexed  (Handle<SHVkBuffer> indirectDrawData, uint32_t drawCount);
-    void DrawMultiIndirect         (Handle<SHVkBuffer> indirectDrawData, uint32_t drawCount);
+    void DrawMultiIndirect         (Handle<SHVkBuffer> indirectDrawData, uint32_t drawCount, uint32_t offset = 0);
 
     // Compute Commands
     void ComputeDispatch    (uint32_t groupCountX, uint32_t groupCountY, uint32_t groupCountZ) noexcept;

SHADE_Engine/src/Graphics/MiddleEnd/Interface/SHGraphicsSystem.cpp

@@ -352,10 +352,10 @@ namespace SHADE
     /*-----------------------------------------------------------------------*/
     auto vfxPass = renderGraph->AddNode(SHGraphicsConstants::RenderGraphEntityNames::VFX_PASS.data(), { "Scene", "Depth Buffer" }, { SHGraphicsConstants::RenderGraphEntityNames::GBUFFER_PASS.data(), SHGraphicsConstants::RenderGraphEntityNames::DEFERRED_COMPOSITE_PASS.data() });
     auto vfxSubpass = vfxPass->AddSubpass(SHGraphicsConstants::RenderGraphEntityNames::VFX_SUBPASS.data(), worldViewport, worldRenderer);
-    vfxPass->AddPreBeginFunction([=](Handle<SHVkCommandBuffer> cmdBuffer, uint32_t frameIndex)
+    //vfxPass->AddPreBeginFunction([=](Handle<SHVkCommandBuffer> cmdBuffer, uint32_t frameIndex)
-      {
+    //  {
-        particleSubSystem->Run(cmdBuffer, frameIndex);
+    //    particleSubSystem->Run(cmdBuffer, frameIndex);
-      });
+    //  });
     vfxSubpass->AddColorOutput("Scene");
     vfxSubpass->AddDepthOutput("Depth Buffer");
     vfxSubpass->AddExteriorDrawCalls([=](Handle<SHVkCommandBuffer> cmdBuffer, Handle<SHRenderer> renderer, uint32_t frameIndex)
@@ -689,7 +689,6 @@ namespace SHADE
     textRenderingSubSystem->Run(frameIndex);
     trajectoryRenderingSubSystem->Run(frameIndex);
 
-
     for (auto renderer : renderers)
     {
 #ifdef SHEDITOR
@@ -711,6 +710,7 @@ namespace SHADE
     renderGraph->Begin(frameIndex);
     auto cmdBuffer = renderGraph->GetCommandBuffer(frameIndex);
 
+    particleSubSystem->Run(cmdBuffer, frameIndex);
 
     renderGraph->Execute(frameIndex, descPool, MESH_DATA);
     renderGraph->End(frameIndex);

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

@@ -166,7 +166,8 @@ namespace SHADE
 
   void SHParticleSubSystem::RenderComponent(Handle<SHVkCommandBuffer> cmdBuffer, SHParticleEmitterComponent& comp, uint32_t frameIndex) noexcept
   {
-    cmdBuffer->DrawMultiIndirect(comp.drawCallData, 1);
+    cmdBuffer->DrawMultiIndirect(comp.drawCallData, 1, static_cast<uint32_t>(sizeof(vk::DrawIndirectCommand)) * frameIndex);
+    //cmdBuffer->DrawArrays(4, 1, 0, 0);
   }
 
   void SHParticleSubSystem::PreparePrePostUpdateBarriers(std::vector<vk::BufferMemoryBarrier>& preUpdateBarriers, std::vector<vk::BufferMemoryBarrier>& postUpdateBarriers, SHParticleEmitterComponent const& emitter, uint32_t const EMITTER_INDEX, uint32_t const FRAME_INDEX) noexcept
@@ -215,10 +216,20 @@ namespace SHADE
       .size = static_cast<uint32_t>(sizeof(uint32_t)) * emitter.maxParticles 
     };
 
+    // make new barrier on stack...
+    vk::BufferMemoryBarrier drawDataBarrier
+    {
+      .srcAccessMask = vk::AccessFlagBits::eShaderWrite,
+      .dstAccessMask = vk::AccessFlagBits::eShaderRead,
+      .buffer = emitter.drawCallData->GetVkBuffer(),
+      .offset = emitter.dynamicOffsets[FRAME_INDEX][DYOFF_INDEX_DRAW_DATA],
+      .size = static_cast<uint32_t>(sizeof(vk::DrawIndirectCommand))
+    };
 
     // ...copy assign barriers on heap 
-    postUpdateBarriers[EMITTER_INDEX * 2] = particleDataBarrierPost;
+    postUpdateBarriers[EMITTER_INDEX * 3] = particleDataBarrierPost;
-    postUpdateBarriers[(EMITTER_INDEX * 2) + 1] = indicesDataBarrier;
+    postUpdateBarriers[(EMITTER_INDEX * 3) + 1] = indicesDataBarrier;
+    postUpdateBarriers[(EMITTER_INDEX * 3) + 2] = drawDataBarrier;
 
   }
 
@@ -264,6 +275,13 @@ namespace SHADE
     }
 
     renderingPipelineData.pipeline->GetPipelineState().SetColorBlenState(colorBlendState);
+
+    // Sets the input assembly state for rendering particles
+    SHInputAssemblyState inputAssemblyState{};
+    inputAssemblyState.topology = vk::PrimitiveTopology::eTriangleFan;
+    renderingPipelineData.pipeline->GetPipelineState().SetInputAssemblyState(inputAssemblyState);
+
+
     renderingPipelineData.pipeline->ConstructPipeline();
 
     SHPipelineLayoutParams emitPlParams
@@ -314,7 +332,7 @@ namespace SHADE
     // After we invoke the updates for the emitters, we need to make sure all particles and indices data are done updating
     // before we issue them for rendering. 
     std::vector<vk::BufferMemoryBarrier> postUpdateBarriers{};
-    postUpdateBarriers.resize(emitters.size() * 2);
+    postUpdateBarriers.resize(emitters.size() * 3);
 
     // If we wanted to be VERY safe, a barrier would be good here to make sure output particles have finish reading input particles in 
     // the update compute. HOWEVER since a NUM_FRAME_BUFFERS frames would have passed by then, we will not insert 1 here.