AlphaBlendingTransparency

Order-Dependent Transparency with Alpha Blending

Code Name: AlphaBlendingTransparency

Description

In this example, four objects are drawn consecutively on the scene, three of which are assigned a transparent material, and the objects are drawn in order according to the camera distance. Alpha blending is applied to these objects to simulate transparency.

Output

Controls

Input	Action
W/A/S/D	Move the camera
Mouse	Look around with the camera
Esc	Close the window

Application Parameters

Settings

Parameter / Key	Type	Usage in Code	Description	Default Value
AppSettings.ClearColor	VkClearColorValue	AppSettings::ClearColor	Background color of the screen
AppSettings.MouseSensitivity	float	AppSettings::MouseSensitivity	Mouse sensitivity value
AppSettings.CameraSpeed	float	AppSettings::CameraSpeed	Speed of the camera

Learning Objectives

• Implementing order-dependent transparency with ordinary alpha blending in Vulkan
• Ordering objects in the scene to the camera distance
• Understanding the blending coefficients and operations in the Vulkan pipelines

Shader Status

Shader Type	Status	Notes
GLSL	✅
HLSL	✅
Slang	❌	Will be implemented.

Theoretical Background

None

Extensions Used

Instance

Window system-dependent extensions:

• VK_KHR_surface
• VK_KHR_win32_surface (Windows)

Device

• VK_KHR_swapchain