fix multisample code

Author: Mysvac

docs/codes/0600_loadmodel/main.cpp

@@ -915,9 +915,6 @@ class HelloTriangleApplication {
 
             return attributeDescriptions;
         }
-        bool operator==(const Vertex& other) const {
-            return pos == other.pos && color == other.color && texCoord == other.texCoord;
-        }
     };
     /////////////////////////////////////////////////////////////////
 

docs/codes/0600_loadmodel/main.diff

@@ -97,9 +97,6 @@ index a209945..6dabfb1 100644
 -    inline static const std::vector<uint16_t> indices = {
 -        0, 1, 2, 2, 3, 0,
 -        4, 5, 6, 6, 7, 4
-+        bool operator==(const Vertex& other) const {
-+            return pos == other.pos && color == other.color && texCoord == other.texCoord;
-+        }
      };
      /////////////////////////////////////////////////////////////////
 

docs/codes/0700_mipmaps/main.cpp

@@ -921,9 +921,6 @@ class HelloTriangleApplication {
 
             return attributeDescriptions;
         }
-        bool operator==(const Vertex& other) const {
-            return pos == other.pos && color == other.color && texCoord == other.texCoord;
-        }
     };
     /////////////////////////////////////////////////////////////////
 

docs/codes/0800_multisample/main.cpp

@@ -544,7 +544,7 @@ class HelloTriangleApplication {
         vk::AttachmentDescription colorAttachmentResolve;
         colorAttachmentResolve.format = m_swapChainImageFormat;
         colorAttachmentResolve.samples = vk::SampleCountFlagBits::e1;
-        colorAttachmentResolve.loadOp = vk::AttachmentLoadOp::eClear;
+        colorAttachmentResolve.loadOp = vk::AttachmentLoadOp::eDontCare;
         colorAttachmentResolve.storeOp = vk::AttachmentStoreOp::eStore;
         colorAttachmentResolve.stencilLoadOp = vk::AttachmentLoadOp::eDontCare;
         colorAttachmentResolve.stencilStoreOp = vk::AttachmentStoreOp::eDontCare;
@@ -953,9 +953,6 @@ class HelloTriangleApplication {
 
             return attributeDescriptions;
         }
-        bool operator==(const Vertex& other) const {
-            return pos == other.pos && color == other.color && texCoord == other.texCoord;
-        }
     };
     /////////////////////////////////////////////////////////////////
 

docs/codes/0800_multisample/main.diff

@@ -62,7 +62,7 @@ index 89a0f11..ad5d479 100644
 +        vk::AttachmentDescription colorAttachmentResolve;
 +        colorAttachmentResolve.format = m_swapChainImageFormat;
 +        colorAttachmentResolve.samples = vk::SampleCountFlagBits::e1;
-+        colorAttachmentResolve.loadOp = vk::AttachmentLoadOp::eClear;
++        colorAttachmentResolve.loadOp = vk::AttachmentLoadOp::eDontCare;
 +        colorAttachmentResolve.storeOp = vk::AttachmentStoreOp::eStore;
 +        colorAttachmentResolve.stencilLoadOp = vk::AttachmentLoadOp::eDontCare;
 +        colorAttachmentResolve.stencilStoreOp = vk::AttachmentStoreOp::eDontCare;

docs/md/0800_multisample.md

@@ -274,14 +274,16 @@ void recreateSwapChain() {
 vk::AttachmentDescription colorAttachmentResolve;
 colorAttachmentResolve.format = m_swapChainImageFormat;
 colorAttachmentResolve.samples = vk::SampleCountFlagBits::e1;
-colorAttachmentResolve.loadOp = vk::AttachmentLoadOp::eClear;
+colorAttachmentResolve.loadOp = vk::AttachmentLoadOp::eDontCare;
 colorAttachmentResolve.storeOp = vk::AttachmentStoreOp::eStore;
 colorAttachmentResolve.stencilLoadOp = vk::AttachmentLoadOp::eDontCare;
 colorAttachmentResolve.stencilStoreOp = vk::AttachmentStoreOp::eDontCare;
 colorAttachmentResolve.initialLayout = vk::ImageLayout::eUndefined;
 colorAttachmentResolve.finalLayout = vk::ImageLayout::ePresentSrcKHR;
 ```
 
+注意 `loadOp` 不再需要清除，整幅图像会根据多重缓冲图像更新全部内容。
+
 现在必须指示渲染通道将多重采样颜色图像解析为常规附件。
 创建一个新的附件引用，它将指向将用作解析目标的颜色缓冲
 

src/main.cpp

@@ -544,7 +544,7 @@ class HelloTriangleApplication {
         vk::AttachmentDescription colorAttachmentResolve;
         colorAttachmentResolve.format = m_swapChainImageFormat;
         colorAttachmentResolve.samples = vk::SampleCountFlagBits::e1;
-        colorAttachmentResolve.loadOp = vk::AttachmentLoadOp::eClear;
+        colorAttachmentResolve.loadOp = vk::AttachmentLoadOp::eDontCare;
         colorAttachmentResolve.storeOp = vk::AttachmentStoreOp::eStore;
         colorAttachmentResolve.stencilLoadOp = vk::AttachmentLoadOp::eDontCare;
         colorAttachmentResolve.stencilStoreOp = vk::AttachmentStoreOp::eDontCare;
@@ -953,9 +953,6 @@ class HelloTriangleApplication {
 
             return attributeDescriptions;
         }
-        bool operator==(const Vertex& other) const {
-            return pos == other.pos && color == other.color && texCoord == other.texCoord;
-        }
     };
     /////////////////////////////////////////////////////////////////