Method setupDraw

examples/vulkan/Vulkan.cpp:2247–2327

Set up the commands we need to issue to draw a frame

    // Set up the commands we need to issue to draw a frame
    void setupDraw()
    {
        // Set up our clear colors
        std::array<VkClearValue, 2> clearColors{};

        // Clear color buffer to opaque black
        clearColors[0]                  = VkClearValue();
        clearColors[0].color.float32[0] = 0.0f;
        clearColors[0].color.float32[1] = 0.0f;
        clearColors[0].color.float32[2] = 0.0f;
        clearColors[0].color.float32[3] = 0.0f;

        // Clear depth to 1.0f
        clearColors[1]                      = VkClearValue();
        clearColors[1].depthStencil.depth   = 1.0f;
        clearColors[1].depthStencil.stencil = 0;

        VkRenderPassBeginInfo renderPassBeginInfo = VkRenderPassBeginInfo();
        renderPassBeginInfo.sType                 = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
        renderPassBeginInfo.renderPass            = renderPass;
        renderPassBeginInfo.renderArea.offset.x   = 0;
        renderPassBeginInfo.renderArea.offset.y   = 0;
        renderPassBeginInfo.renderArea.extent     = swapchainExtent;
        renderPassBeginInfo.clearValueCount       = static_cast<std::uint32_t>(clearColors.size());
        renderPassBeginInfo.pClearValues          = clearColors.data();

        // Simultaneous use: this command buffer can be resubmitted to a queue before a previous submission is completed
        VkCommandBufferBeginInfo commandBufferBeginInfo = VkCommandBufferBeginInfo();
        commandBufferBeginInfo.sType                    = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
        commandBufferBeginInfo.flags                    = VK_COMMAND_BUFFER_USAGE_SIMULTANEOUS_USE_BIT;

        // Set up the command buffers for each frame in flight
        for (std::size_t i = 0; i < commandBuffers.size(); ++i)
        {
            // Begin the command buffer
            if (vkBeginCommandBuffer(commandBuffers[i], &commandBufferBeginInfo) != VK_SUCCESS)
            {
                vulkanAvailable = false;
                return;
            }

            // Begin the renderpass
            renderPassBeginInfo.framebuffer = swapchainFramebuffers[i];

            vkCmdBeginRenderPass(commandBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);

            // Bind our graphics pipeline
            vkCmdBindPipeline(commandBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, graphicsPipeline);

            // Bind our vertex buffer
            const VkDeviceSize offset = 0;

            vkCmdBindVertexBuffers(commandBuffers[i], 0, 1, &vertexBuffer, &offset);

            // Bind our index buffer
            vkCmdBindIndexBuffer(commandBuffers[i], indexBuffer, 0, VK_INDEX_TYPE_UINT16);

            // Bind our descriptor sets