Added deebug drawing of cubes of any transform

Assets/Shaders/DebugDrawMesh_VS.glsl

@@ -1,7 +1,7 @@
 #version 450
 #extension GL_KHR_vulkan_glsl : enable
 
-layout(location = 0) in vec4 aVertexPos;
+layout(location = 0) in vec3 aVertexPos;
 layout(location = 1) in mat4 worldTransform;
 layout(location = 5) in vec4 color;
 

Assets/Shaders/DebugDraw_VS.glsl

@@ -1,7 +1,7 @@
 #version 450
 #extension GL_KHR_vulkan_glsl : enable
 
-layout(location = 0) in vec4 aVertexPos;
+layout(location = 0) in vec3 aVertexPos;
 layout(location = 1) in vec4 aVertColor;
 
 // Output
@@ -21,6 +21,6 @@ layout(set = 2, binding = 0) uniform CameraData
 
 void main()
 {
-  gl_Position = cameraData.vpMat * vec4 (aVertexPos.xyz, 1.0f);
+  gl_Position = cameraData.vpMat * vec4 (aVertexPos, 1.0f);
   Out.vertColor = aVertColor;
 }

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

@@ -48,15 +48,34 @@ namespace SHADE
 
     // Get current frame index
     const uint32_t FRAME_IDX = gfxSys->GetCurrentFrameIndex();
+    
+    // Set up line batches
     for (auto& batch : system->lineBatches)
     {
       system->prepareBatch(batch, FRAME_IDX);
       batch.Points.clear();
     }
+
+    // Set up mesh batches
+    for (auto& batch : system->meshBatches)
+    {
+      system->prepareBatch(batch, FRAME_IDX);
+      for (auto& subBatch : batch.SubBatches)
+      {
+        subBatch.second.InstanceColors.clear();
+        subBatch.second.InstanceTransforms.clear();
+      }
+    }
+
+    // Set up persistent batches if it was wiped
+    if (system->persistentBuffersCleared[FRAME_IDX])
+    {
       for (auto& batch : system->persistentLineBatches)
       {
         system->prepareBatch(batch, FRAME_IDX);
       }
+      system->persistentBuffersCleared[FRAME_IDX] = false;
+    }
   }
 
   /*-----------------------------------------------------------------------------------*/
@@ -64,8 +83,8 @@ namespace SHADE
   /*-----------------------------------------------------------------------------------*/
   void SHDebugDrawSystem::Init()
   {
-    const auto* GFX_SYSTEM = SHSystemManager::GetSystem<SHGraphicsSystem>();
+    gfxSystem = SHSystemManager::GetSystem<SHGraphicsSystem>();
-    if (!GFX_SYSTEM)
+    if (!gfxSystem)
     {
       SHLOG_ERROR("[DebugDraw] Attempted to do debug draw without a graphics system.");
       return;
@@ -76,21 +95,49 @@ namespace SHADE
     createMeshBatches();
 
     // Register function for subpass
-    auto const& RENDERERS = GFX_SYSTEM->GetDefaultViewport()->GetRenderers();
+    auto const& RENDERERS = gfxSystem->GetDefaultViewport()->GetRenderers();
     auto renderGraph = RENDERERS[SHGraphicsConstants::RenderGraphIndices::WORLD]->GetRenderGraph();
     auto subPass = renderGraph->GetNode("Debug Draw")->GetSubpass("Debug Draw");
-    subPass->AddExteriorDrawCalls([this, GFX_SYSTEM](Handle<SHVkCommandBuffer>& cmdBuffer, uint32_t frameIndex)
+    subPass->AddExteriorDrawCalls([this](Handle<SHVkCommandBuffer>& cmdBuffer, uint32_t frameIndex)
+    {
+      const uint32_t FRAME_IDX = gfxSystem->GetCurrentFrameIndex();
+      cmdBuffer->BeginLabeledSegment("SHDebugDraw (No Depth Test)");
+      {
+        cmdBuffer->BeginLabeledSegment("SHDebugDraw (Lines)");
         {
-      const uint32_t FRAME_IDX = GFX_SYSTEM->GetCurrentFrameIndex();
           renderBatch(lineBatches[static_cast<int>(LineRenderMode::NoDepthTest)], cmdBuffer, FRAME_IDX);
           renderBatch(persistentLineBatches[static_cast<int>(LineRenderMode::NoDepthTest)], cmdBuffer, FRAME_IDX);
+        }
+        cmdBuffer->EndLabeledSegment();
+
+        cmdBuffer->BeginLabeledSegment("SHDebugDraw (Meshes)");
+        {
+          renderBatch(meshBatches[static_cast<int>(MeshRenderMode::WireNoDepthTest)], cmdBuffer, FRAME_IDX);
+        }
+        cmdBuffer->EndLabeledSegment();
+      }
+      cmdBuffer->EndLabeledSegment();
     });
     auto subPassWithDepth = renderGraph->GetNode("Debug Draw with Depth")->GetSubpass("Debug Draw with Depth");
-    subPassWithDepth->AddExteriorDrawCalls([this, GFX_SYSTEM](Handle<SHVkCommandBuffer>& cmdBuffer, uint32_t frameIndex)
+    subPassWithDepth->AddExteriorDrawCalls([this](Handle<SHVkCommandBuffer>& cmdBuffer, uint32_t frameIndex)
+    {
+      const uint32_t FRAME_IDX = gfxSystem->GetCurrentFrameIndex();
+      cmdBuffer->BeginLabeledSegment("SHDebugDraw (Depth Tested)");
+      {
+        cmdBuffer->BeginLabeledSegment("SHDebugDraw (Lines)");
         {
-      const uint32_t FRAME_IDX = GFX_SYSTEM->GetCurrentFrameIndex();
           renderBatch(lineBatches[static_cast<int>(LineRenderMode::DepthTested)], cmdBuffer, FRAME_IDX);
           renderBatch(persistentLineBatches[static_cast<int>(LineRenderMode::DepthTested)], cmdBuffer, FRAME_IDX);
+        }
+        cmdBuffer->EndLabeledSegment();
+
+        cmdBuffer->BeginLabeledSegment("SHDebugDraw (Meshes)");
+        {
+          renderBatch(meshBatches[static_cast<int>(MeshRenderMode::WireDepthTested)], cmdBuffer, FRAME_IDX);
+        }
+        cmdBuffer->EndLabeledSegment();
+      }
+      cmdBuffer->EndLabeledSegment();
     });
   }
 
@@ -120,6 +167,11 @@ namespace SHADE
     DrawLineLoop({ p1, p2, p3 }, color, depthTested);
   }
 
+  void SHDebugDrawSystem::DrawWireBox(const SHMatrix& matrix, const SHColour& color, bool depthTested)
+  {
+    drawWireBox(getMeshBatch(false, depthTested), matrix, color);
+  }
+
   /*-----------------------------------------------------------------------------------*/
   /* Persistent Draw Functions                                                         */
   /*-----------------------------------------------------------------------------------*/
@@ -138,6 +190,14 @@ namespace SHADE
     DrawPersistentLineLoop({ p1, p2, p3 }, color, depthTested);
   }
 
+  void SHDebugDrawSystem::ClearPersistentDraws()
+  {
+    for (auto& batch : persistentLineBatches)
+      batch.Points.clear();
+    for (bool& cleared : persistentBuffersCleared)
+      cleared = true;
+  }
+
   /*-----------------------------------------------------------------------------------*/
   /* Helper Draw Functions                                                             */
   /*-----------------------------------------------------------------------------------*/
@@ -154,18 +214,41 @@ namespace SHADE
     batch.Points.emplace_back(end, color);
   }
 
+  void SHDebugDrawSystem::drawWireBox(MeshBatch& batch, const SHMatrix& transformMatrix, const SHColour& color)
+  {
+    
+    const auto* GFX_SYSTEM = SHSystemManager::GetSystem<SHGraphicsSystem>();
+    if (!GFX_SYSTEM)
+    {
+      SHLOG_ERROR("[DebugDraw] Attempted to do debug draw without a graphics system.");
+      return;
+    }
+
+    Handle<SHMesh> box = GFX_SYSTEM->GetMeshPrimitive(PrimitiveType::LineCube);
+
+    // Create if doesn't exist
+    if (!batch.SubBatches.contains(box))
+    {
+      MeshBatch::MultiDrawSet set;
+      set.Mesh = box;
+      batch.SubBatches.emplace(box, std::move(set));
+    }
+
+    // Add to the batch
+    batch.SubBatches[box].InstanceTransforms.emplace_back(transformMatrix);
+    batch.SubBatches[box].InstanceColors.emplace_back(color);
+  }
+
   /*-----------------------------------------------------------------------------------*/
   /* Helper Batch Functions - Lines                                                    */
   /*-----------------------------------------------------------------------------------*/
   SHDebugDrawSystem::LinesBatch& SHDebugDrawSystem::getLineBatch(bool depthTested)
   {
-    return depthTested ? lineBatches[static_cast<int>(LineRenderMode::DepthTested)]
+    return lineBatches[static_cast<int>(depthTested ? LineRenderMode::DepthTested : LineRenderMode::NoDepthTest)];
-                       : lineBatches[static_cast<int>(LineRenderMode::NoDepthTest)];
   }
   SHDebugDrawSystem::LinesBatch& SHDebugDrawSystem::getPersistentLineBatch(bool depthTested)
   {
-    return depthTested ? persistentLineBatches[static_cast<int>(LineRenderMode::DepthTested)]
+    return persistentLineBatches[static_cast<int>(depthTested ? LineRenderMode::DepthTested : LineRenderMode::NoDepthTest)];
-                       : persistentLineBatches[static_cast<int>(LineRenderMode::NoDepthTest)];
   }
 
   void SHDebugDrawSystem::createLineBatches()
@@ -255,7 +338,6 @@ namespace SHADE
   {
     if (batch.NumPoints[frameIndex] > 0)
     {
-      cmdBuffer->BeginLabeledSegment("SHDebugDraw");
       cmdBuffer->BindPipeline(batch.Pipeline);
       cmdBuffer->SetLineWidth(LineWidth);
       cmdBuffer->BindVertexBuffer(0, batch.VertexBuffers[frameIndex], 0);
@@ -286,6 +368,24 @@ namespace SHADE
   /*-----------------------------------------------------------------------------------*/
   /* Helper Batch Functions - Meshes                                                   */
   /*-----------------------------------------------------------------------------------*/
+  SHDebugDrawSystem::MeshBatch& SHDebugDrawSystem::getMeshBatch(bool filled, bool depthTested)
+  {
+    MeshRenderMode mode = {};
+
+    if (filled)
+    {
+      mode = depthTested ? MeshRenderMode::FilledDepthTested
+                         : MeshRenderMode::FilledNoDepthTest;
+    }
+    else
+    {
+      mode = depthTested ? MeshRenderMode::WireDepthTested
+                         : MeshRenderMode::WireNoDepthTest;
+    }
+
+    return meshBatches[static_cast<int>(mode)];
+  }
+
   void SHDebugDrawSystem::createMeshBatches()
   {
     auto gfxSys = SHSystemManager::GetSystem<SHGraphicsSystem>();
@@ -321,9 +421,115 @@ namespace SHADE
   {
     batch.Pipeline = pipeline;
   }
+
+  void SHDebugDrawSystem::prepareBatch(MeshBatch& batch, uint32_t frameIndex)
+  {
+    // Parameter checks
+    if (frameIndex > batch.MDIBuffer.size())
+    {
+      SHLOG_ERROR("[SHDebugDrawSystem] An invalid frame index was specified for debug drawing. Skipping.");
+      return;
+    }
+
+    // Clear existing data
+    batch.InstanceTransforms.clear();
+    batch.InstanceColors.clear();
+    batch.MDIData.clear();
+
+    // Populate
+    for (auto& subBatch : batch.SubBatches)
+    {
+      auto& multiDrawSet = subBatch.second;
+
+      // Nothing to populate with
+      if (multiDrawSet.InstanceTransforms.empty())
+        continue;
+      
+      // Populate batch data on CPU
+      batch.MDIData.emplace_back(vk::DrawIndexedIndirectCommand
+      {
+        .indexCount    = multiDrawSet.Mesh->IndexCount,
+        .instanceCount = static_cast<uint32_t>(multiDrawSet.InstanceTransforms.size()),
+        .firstIndex    = multiDrawSet.Mesh->FirstIndex,
+        .vertexOffset  = multiDrawSet.Mesh->FirstVertex,
+        .firstInstance = static_cast<uint32_t>(batch.InstanceTransforms.size())
+      });
+      batch.InstanceTransforms.insert
+      (
+        batch.InstanceTransforms.end(), 
+        multiDrawSet.InstanceTransforms.begin(), 
+        multiDrawSet.InstanceTransforms.end()
+      );
+      batch.InstanceColors.insert
+      (
+        batch.InstanceColors.end(), 
+        multiDrawSet.InstanceColors.begin(), 
+        multiDrawSet.InstanceColors.end()
+      );
+
+      // Copy to GPU
+      SHVkUtil::EnsureBufferAndCopyHostVisibleData
+      (
+        gfxSystem->GetDevice(),
+        batch.MDIBuffer[frameIndex],
+        batch.MDIData.data(), static_cast<uint32_t>(batch.MDIData.size() * sizeof(vk::DrawIndexedIndirectCommand)),
+        vk::BufferUsageFlagBits::eIndirectBuffer,
+        "Debug Draw Mesh Batch MDI Buffer"
+      );
+      SHVkUtil::EnsureBufferAndCopyHostVisibleData
+      (
+        gfxSystem->GetDevice(),
+        batch.InstanceTransformBuffer[frameIndex],
+        batch.InstanceTransforms.data(), static_cast<uint32_t>(batch.InstanceTransforms.size() * sizeof(SHMatrix)),
+        vk::BufferUsageFlagBits::eVertexBuffer,
+        "Debug Draw Mesh Batch Instance Transform Buffer"
+      );
+      SHVkUtil::EnsureBufferAndCopyHostVisibleData
+      (
+        gfxSystem->GetDevice(),
+        batch.InstanceColorBuffer[frameIndex],
+        batch.InstanceColors.data(), static_cast<uint32_t>(batch.InstanceColors.size() * sizeof(SHVec4)),
+        vk::BufferUsageFlagBits::eVertexBuffer,
+        "Debug Draw Mesh Batch Instance Color Buffer"
+      );
+    }
+  }
+  
+  void SHDebugDrawSystem::renderBatch(MeshBatch& batch, Handle<SHVkCommandBuffer> cmdBuffer, uint32_t frameIndex)
+  {
+    static constexpr uint32_t TRANSFORM_BIND_PT = 1;
+    static constexpr uint32_t COLOR_BIND_PT = 2;
+
+    // Nothing to draw
+    if (batch.MDIData.empty())
+      return;
+
+    // Bind Pipeline
+    cmdBuffer->BindPipeline(batch.Pipeline);
+
+    // Bind meshes
+    cmdBuffer->BindVertexBuffer(0, gfxSystem->GetMeshLibrary().GetVertexPositionsBuffer(), 0);
+    cmdBuffer->BindIndexBuffer(gfxSystem->GetMeshLibrary().GetIndexBuffer(), 0);
+
+    // Bind instance attributes
+    cmdBuffer->BindVertexBuffer(TRANSFORM_BIND_PT, batch.InstanceTransformBuffer[frameIndex], 0);
+    cmdBuffer->BindVertexBuffer(COLOR_BIND_PT, batch.InstanceColorBuffer[frameIndex], 0);
+
+    // Execute draw
+    cmdBuffer->DrawMultiIndirect(batch.MDIBuffer[frameIndex], static_cast<uint32_t>(batch.MDIData.size()));
+  }
+
   void SHDebugDrawSystem::destroyBatch(MeshBatch& batch)
   {
-    for (auto& buffer : batch.InstanceDataBuffer)
+    for (auto& buffer : batch.InstanceColorBuffer)
+    {
+      if (buffer)
+      {
+        buffer.Free();
+        buffer = {};
+      }
+    }
+    for (auto& buffer : batch.InstanceTransformBuffer)
     {
       if (buffer)
       {

SHADE_Engine/src/Graphics/MiddleEnd/Interface/SHDebugDrawSystem.h

@@ -31,6 +31,7 @@ namespace SHADE
   /*-----------------------------------------------------------------------------------*/
   /* Forward Declarations                                                              */
   /*-----------------------------------------------------------------------------------*/
+  class SHGraphicsSystem;
   class SHVkBuffer;
   class SHMesh;
   class SHVkPipeline;
@@ -99,7 +100,7 @@ namespace SHADE
     template<typename IterType>
     void DrawLineLoop(IterType pointListBegin, IterType pointListEnd, const SHColour& color = SHColour::WHITE, bool depthTested = false);
     void DrawTri(const SHVec3& p1, const SHVec3& p2, const SHVec3& p3, const SHColour& color = SHColour::WHITE, bool depthTested = false);
-    //void DrawWireBox(const SHVec3& position, const SHVec3& scale, const SHColour& color = SHColour::WHITE, bool depthTested = false);
+    void DrawWireCube(const SHMatrix& matrix, const SHColour& color = SHColour::WHITE, bool depthTested = false);
 
     /*---------------------------------------------------------------------------------*/
     /* Persistent Draw Functions                                                       */
@@ -109,6 +110,10 @@ namespace SHADE
     template<typename IterType>
     void DrawPersistentLineLoop(IterType pointListBegin, IterType pointListEnd, const SHColour& color = SHColour::WHITE, bool depthTested = false);
     void DrawPersistentTri(const SHVec3& p1, const SHVec3& p2, const SHVec3& p3, const SHColour& color = SHColour::WHITE, bool depthTested = false);
+    /// <summary>
+    /// Clears any persistent drawn debug primitives.
+    /// </summary>
+    void ClearPersistentDraws();
 
     private:
     /*---------------------------------------------------------------------------------*/
@@ -151,26 +156,25 @@ namespace SHADE
       /*-------------------------------------------------------------------------------*/
       /* Type Definitions                                                              */
       /*-------------------------------------------------------------------------------*/
-      struct InstanceData
-      {
-        SHMatrix Transform;
-        SHVec4   Color;
-      };
       struct MultiDrawSet
       {
         Handle<SHMesh> Mesh;
-        std::vector<InstanceData> Instances;
+        std::vector<SHMatrix> InstanceTransforms;
+        std::vector<SHVec4> InstanceColors;
       };
       
       /*-------------------------------------------------------------------------------*/
       /* Data Members                                                                  */
       /*-------------------------------------------------------------------------------*/
       // CPU Buffers
-      std::vector<MultiDrawSet> SubBatches;
+      std::unordered_map<Handle<SHMesh>, MultiDrawSet> SubBatches;
-      std::vector<InstanceData> InstanceData;
+      std::vector<SHMatrix> InstanceTransforms;
+      std::vector<SHVec4> InstanceColors;
+      std::vector<vk::DrawIndexedIndirectCommand> MDIData;
       // GPU Buffers
       TripleBuffer MDIBuffer;
-      TripleBuffer InstanceDataBuffer;
+      TripleBuffer InstanceTransformBuffer;
+      TripleBuffer InstanceColorBuffer;
     };
 
     /*---------------------------------------------------------------------------------*/
@@ -183,6 +187,8 @@ namespace SHADE
     /*---------------------------------------------------------------------------------*/
     /* Data Members                                                                    */
     /*---------------------------------------------------------------------------------*/
+    // References
+    SHGraphicsSystem* gfxSystem = nullptr;
     // Batches
     std::array<LinesBatch, LINE_MODE_COUNT> lineBatches;
     std::array<LinesBatch, LINE_MODE_COUNT> persistentLineBatches;
@@ -196,6 +202,7 @@ namespace SHADE
     void drawLine(LinesBatch& batch, const SHVec3& start, const SHVec3& end, const SHColour& color);
     template<typename IterType>
     void drawLineLoop(LinesBatch& batch, IterType pointListBegin, IterType pointListEnd, const SHColour& color);
+    void drawWireBox(MeshBatch& batch, const SHMatrix& transformMatrix, const SHColour& color);
 
     /*---------------------------------------------------------------------------------*/
     /* Helper Batch Functions - Lines                                                  */
@@ -212,6 +219,7 @@ namespace SHADE
     /*---------------------------------------------------------------------------------*/
     /* Helper Batch Functions - Meshes                                                 */
     /*---------------------------------------------------------------------------------*/
+    MeshBatch& getMeshBatch(bool filled, bool depthTested);
     void createMeshBatches();
     void initBatch(MeshBatch& batch, Handle<SHVkPipeline> pipeline);
     void prepareBatch(MeshBatch& batch, uint32_t frameIndex);

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

@@ -413,6 +413,7 @@ namespace SHADE
 
     // Create default meshes
     primitiveMeshes[static_cast<int>(PrimitiveType::Cube)]   = SHPrimitiveGenerator::Cube(meshLibrary);
+    primitiveMeshes[static_cast<int>(PrimitiveType::LineCube)] = SHPrimitiveGenerator::LineCube(meshLibrary);
     primitiveMeshes[static_cast<int>(PrimitiveType::Sphere)] = SHPrimitiveGenerator::Sphere(meshLibrary);
     BuildMeshBuffers();
 
@@ -838,6 +839,7 @@ namespace SHADE
     {
       case PrimitiveType::Cube:
       case PrimitiveType::Sphere:
+      case PrimitiveType::LineCube:
         return primitiveMeshes[static_cast<int>(type)];
       default:
         return {};
@@ -1121,7 +1123,7 @@ namespace SHADE
     (
       device, SHPipelineLayoutParams
       {
-        .shaderModules = { (triMesh ? debugMeshVertShader : debugVertShader) , debugFragShader },
+        .shaderModules = { (instanced ? debugMeshVertShader : debugVertShader) , debugFragShader },
         .globalDescSetLayouts = SHGraphicsGlobalData::GetDescSetLayouts()
       }
     );
@@ -1139,7 +1141,7 @@ namespace SHADE
     SHVertexInputState debugDrawVertexInputState;
     if (instanced)
     {
-      debugDrawVertexInputState.AddBinding(false, false, { SHVertexAttribute(SHAttribFormat::FLOAT_4D) }); // 0: Vertex World Space Position
+      debugDrawVertexInputState.AddBinding(false, false, { SHVertexAttribute(SHAttribFormat::FLOAT_3D) }); // 0: Vertex World Space Position
       debugDrawVertexInputState.AddBinding(true , true , { SHVertexAttribute(SHAttribFormat::MAT_4D) });   // 1: Instance Transform Matrix (4 Slots)
       debugDrawVertexInputState.AddBinding(true , true , { SHVertexAttribute(SHAttribFormat::FLOAT_4D) }); // 5: Instance Color
     }

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

@@ -70,9 +70,10 @@ namespace SHADE
   enum class PrimitiveType
   {
     Cube,
-    Sphere
+    Sphere,
+    LineCube
   };
-  static constexpr int MAX_PRIMITIVE_TYPES = 2;
+  static constexpr int MAX_PRIMITIVE_TYPES = 3;
   enum class DebugDrawPipelineType
   {
     LineNoDepthTest,
@@ -386,6 +387,7 @@ namespace SHADE
     Handle<SHVkPipeline>                GetDebugDrawPipeline(DebugDrawPipelineType type) const noexcept;
     uint32_t                            GetCurrentFrameIndex(void) const noexcept { return renderContext.GetCurrentFrame(); }
     SHFontLibrary const&                GetFontLibrary (void) const noexcept;
+    const SHMeshLibrary&                GetMeshLibrary() const noexcept { return meshLibrary; };
 
     /*-----------------------------------------------------------------------------*/
     /* Getters                                                                     */

SHADE_Engine/src/Graphics/MiddleEnd/Meshes/SHPrimitiveGenerator.cpp

@@ -23,6 +23,7 @@ namespace SHADE
   /*-----------------------------------------------------------------------------------*/
   SHMeshData SHPrimitiveGenerator::cubeMesh;
   SHMeshData SHPrimitiveGenerator::sphereMesh;
+  SHMeshData SHPrimitiveGenerator::lineCubeMesh;
 
   /*-----------------------------------------------------------------------------------*/
   /* Primitive Generation Functions                                                    */
@@ -207,14 +208,14 @@ namespace SHADE
     return addMeshDataTo(cubeMesh, meshLibrary);
   }
 
-  Handle<SHADE::SHMesh> SHPrimitiveGenerator::Cube(SHGraphicsSystem& gfxSystem) noexcept
+  Handle<SHMesh> SHPrimitiveGenerator::Cube(SHGraphicsSystem& gfxSystem) noexcept
   {
     if (cubeMesh.VertexPositions.empty())
       cubeMesh = Cube();
     return addMeshDataTo(cubeMesh, gfxSystem);
   }
 
-  SHADE::SHMeshData SHPrimitiveGenerator::Sphere() noexcept
+  SHMeshData SHPrimitiveGenerator::Sphere() noexcept
   {
     SHMeshData meshData;
 
@@ -265,7 +266,7 @@ namespace SHADE
     return meshData;
   }
 
-  SHADE::Handle<SHADE::SHMesh> SHPrimitiveGenerator::Sphere(SHMeshLibrary& meshLibrary) noexcept
+  Handle<SHMesh> SHPrimitiveGenerator::Sphere(SHMeshLibrary& meshLibrary) noexcept
   {
     if (sphereMesh.VertexPositions.empty())
       sphereMesh = Sphere();
@@ -273,7 +274,7 @@ namespace SHADE
     return addMeshDataTo(sphereMesh, meshLibrary);
   }
 
-  SHADE::Handle<SHADE::SHMesh> SHPrimitiveGenerator::Sphere(SHGraphicsSystem& gfxSystem) noexcept
+  Handle<SHMesh> SHPrimitiveGenerator::Sphere(SHGraphicsSystem& gfxSystem) noexcept
   {
     if (sphereMesh.VertexPositions.empty())
       sphereMesh = Sphere();
@@ -281,6 +282,65 @@ namespace SHADE
     return addMeshDataTo(sphereMesh, gfxSystem);
   }
 
+  SHMeshData SHPrimitiveGenerator::LineCube() noexcept
+  {
+    SHMeshData mesh;
+
+    mesh.VertexPositions = 
+    {
+      // Front
+      SHVec3(-0.5f, -0.5f,  0.5f),
+      SHVec3( 0.5f, -0.5f,  0.5f),
+      SHVec3( 0.5f,  0.5f,  0.5f),
+      SHVec3(-0.5f,  0.5f,  0.5f),
+
+      // Back
+      SHVec3(-0.5f, -0.5f, -0.5f),
+      SHVec3( 0.5f, -0.5f, -0.5f),
+      SHVec3( 0.5f,  0.5f, -0.5f),
+      SHVec3(-0.5f,  0.5f, -0.5f)
+    };
+    mesh.VertexNormals.resize(mesh.VertexPositions.size());
+    mesh.VertexTangents.resize(mesh.VertexPositions.size());
+    mesh.VertexTexCoords.resize(mesh.VertexPositions.size());
+    mesh.Indices =
+    {
+      // Front
+      0, 1,
+      1, 2,
+      2, 3,
+      3, 0,
+      // Connectors
+      0, 4,
+      1, 5,
+      2, 6,
+      3, 7,
+      // Back
+      4, 5,
+      5, 6,
+      6, 7,
+      7, 4,
+    };
+
+    return mesh;
+  }
+
+  Handle<SHMesh> SHPrimitiveGenerator::LineCube(SHMeshLibrary& meshLibrary) noexcept
+  {
+    if (lineCubeMesh.VertexPositions.empty())
+      lineCubeMesh = LineCube();
+
+    return addMeshDataTo(lineCubeMesh, meshLibrary);
+  }
+
+  Handle<SHMesh> SHPrimitiveGenerator::LineCube(SHGraphicsSystem& gfxSystem) noexcept
+  {
+    if (lineCubeMesh.VertexPositions.empty())
+      lineCubeMesh = LineCube();
+
+    return addMeshDataTo(lineCubeMesh, gfxSystem);
+  }
+
   /*-----------------------------------------------------------------------------------*/
   /* Helper Functions                                                                  */
   /*-----------------------------------------------------------------------------------*/

SHADE_Engine/src/Graphics/MiddleEnd/Meshes/SHPrimitiveGenerator.h

@@ -116,6 +116,44 @@ namespace SHADE
     */
     /***********************************************************************************/
     [[nodiscard]] static Handle<SHMesh> Sphere(SHGraphicsSystem& gfxSystem) noexcept;
+    /***********************************************************************************/
+    /*!
+      \brief
+        Produces a cube that is comprised only of lines with no diagonal lines and store
+        the data in a SHMeshData object.
+
+      \return
+        SHMeshData object containing vertex data for the line cube.
+    */
+    /***********************************************************************************/
+    [[nodiscard]] static SHMeshData LineCube() noexcept;
+    /***********************************************************************************/
+    /*!
+      \brief
+        Produces a line cube and constructs a SHMesh using the SHGraphicsSystem provided.
+
+      \param meshLibrary
+        Reference to the SHMeshLibrary to produce and store a line cube mesh in.
+
+      \return
+        SHMesh object that points to the generated line cube mesh in the SHMeshLibrary.
+    */
+    /***********************************************************************************/
+    [[nodiscard]] static Handle<SHMesh> LineCube(SHMeshLibrary& meshLibrary) noexcept;
+    /***********************************************************************************/
+    /*!
+      \brief
+        Produces a line cube and constructs a SHMesh using the SHGraphicsSystem provided.
+
+      \param gfxSystem
+        Reference to the SHGraphicsSystem to produce and store a line cube mesh in. 
+
+      \return
+        SHMesh object that points to the generated line cube mesh in the 
+        SHGraphicsSystem.
+    */
+    /***********************************************************************************/
+    [[nodiscard]] static Handle<SHMesh> LineCube(SHGraphicsSystem& gfxSystem) noexcept;
 
   private:
     /*---------------------------------------------------------------------------------*/
@@ -129,5 +167,6 @@ namespace SHADE
     /*---------------------------------------------------------------------------------*/
     static SHMeshData cubeMesh;
     static SHMeshData sphereMesh;
+    static SHMeshData lineCubeMesh;
   };
 }

SHADE_Engine/src/Tools/SHDebugDraw.cpp

@@ -71,6 +71,11 @@ namespace SHADE
     //dbgDrawSys->DrawSphere(color, pos, radius);
   }
 
+  void SHDebugDraw::WireCube(const SHMatrix& mat, const SHVec4& color)
+  {
+    dbgDrawSys->DrawWireCube(mat, color);
+  }
+
   void SHDebugDraw::PersistentLine(const SHVec4& color, const SHVec3& startPt, const SHVec3& endPt)
   {
     dbgDrawSys->DrawPersistentLine(startPt, endPt, color);
@@ -103,7 +108,6 @@ namespace SHADE
 
   void SHDebugDraw::ClearPersistentDraws()
   {
-    //dbgDrawSys->ClearPersistentDraws();
+    dbgDrawSys->ClearPersistentDraws();
   }
-
 }

SHADE_Engine/src/Tools/SHDebugDraw.h

@@ -22,6 +22,7 @@ namespace SHADE
   class SHDebugDrawSystem;
   class SHVec4;
   class SHVec3;
+  class SHMatrix;
   class SHColour;
   
   /*-----------------------------------------------------------------------------------*/
@@ -92,6 +93,8 @@ namespace SHADE
     /// <param name="size">Size of the rendered sphere.</param>
     static void Sphere(const SHVec4& color, const SHVec3& pos, double radius);
 
+    static void WireCube(const SHMatrix& mat, const SHVec4& color);
+
     /*---------------------------------------------------------------------------------*/
     /* Persistent Draw Functions                                                       */
     /*---------------------------------------------------------------------------------*/