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3D Graphics Rendering Cookbook
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As we learned from the previous chapter, the Vulkan API is pretty verbose. We need something to conceal the API's verbosity and organize our frame rendering code in a manageable way. Let's assume that each frame is composed of multiple layers, just like an image in a graphics editor. The first, and rather formal, layer is the solid background color. The next layer might be a 3D scene with models and lights. On top of a beautifully rendered 3D scene, we could optionally add some wireframe meshes to draw useful debugging information. These wireframe objects belong in another layer. Next, we add a 2D user interface, for example, using the ImGui library. There might be some additional layers, such as fullscreen charts with performance statistics or frames-per-second (FPS) counters. Finally, the finishing layer transitions the swapchain image to the VK_LAYOUT_PRESENT_SRC_KHR
layout.
In this recipe, we define an interface to render a single...