Book Image

Vulkan Cookbook

By : Lapinski
Book Image

Vulkan Cookbook

By: Lapinski

Overview of this book

Vulkan is the next generation graphics API released by the Khronos group. It is expected to be the successor to OpenGL and OpenGL ES, which it shares some similarities with such as its cross-platform capabilities, programmed pipeline stages, or nomenclature. Vulkan is a low-level API that gives developers much more control over the hardware, but also adds new responsibilities such as explicit memory and resources management. With it, though, Vulkan is expected to be much faster. This book is your guide to understanding Vulkan through a series of recipes. We start off by teaching you how to create instances in Vulkan and choose the device on which operations will be performed. You will then explore more complex topics such as command buffers, resources and memory management, pipelines, GLSL shaders, render passes, and more. Gradually, the book moves on to teach you advanced rendering techniques, how to draw 3D scenes, and how to improve the performance of your applications. By the end of the book, you will be familiar with the latest advanced techniques implemented with the Vulkan API, which can be used on a wide range of platforms.
Table of Contents (13 chapters)

Setting line width states dynamically

One of the parameters defined during the graphics pipeline creation is the width of drawn lines. We can define it statically. But if we intend to draw multiple lines with different widths, we should specify line width as one of the dynamic states. This way, we can use the same pipeline object and specify the width of the drawn lines with a function call.

How to do it...

  1. Take the handle of a command buffer that is being recorded and use it to initialize a variable of type VkCommandBuffer named command_buffer.
  2. Create a variable of type float named line_width through which the width of drawn lines will be provided.
  3. Call vkCmdSetLineWidth( command_buffer, line_width ) providing the command_buffer and line_width variables.
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