Static index buffering

vulkan/vulkan_app.hpp

@@ -57,11 +57,16 @@ namespace vapp{
 
     // TODO: Remove
     const std::vector<Vertex> vertices = {
-        {{0.0f, -0.5f}, {0.0f, 1.0f, 0.0f}},
+        {{-0.5f, -0.5f}, {0.0f, 1.0f, 0.0f}},
+        {{0.5f, -0.5f}, {0.0f, 0.0f, 1.0f}},
 {{0.5f, 0.5f}, {0.0f, 1.0f, 0.0f}},
 {{-0.5f, 0.5f}, {0.0f, 0.0f, 1.0f}}
     };
 
+    // uint16_t also possible -> change in vkCmdBindIndexBuffer also
+    const std::vector<uint32_t> indices = { 0, 1, 2, 2, 3, 0 };
+    // END Remove
+
     struct QueueFamilyIndices{
         std::optional<uint32_t> graphicsFamily;
         std::optional<uint32_t> presentFamily;
@@ -123,6 +128,8 @@ namespace vapp{
 
         VkBuffer vertexBuffer;
         VkDeviceMemory vertexBufferMemory;
+        VkBuffer indexBuffer;
+        VkDeviceMemory indexBufferMemory;
 #pragma endregion
 
         bool checkValidationLayerSupport();
@@ -151,6 +158,7 @@ namespace vapp{
         void createBuffer(VkDeviceSize size, VkBufferUsageFlags usage, VkMemoryPropertyFlags properties, VkBuffer &buffer, VkDeviceMemory &bufferMemory);
         void copyBuffer(VkBuffer srcBuffer, VkBuffer dstBuffer, VkDeviceSize size);
         void createVertexBuffer();
+        void createIndexBuffer();
         void createCommandBuffers();
         void recordCommandBuffer(VkCommandBuffer commandBuffer, uint32_t imageIndex);
         void createSyncObjects();