BasicTriangleTessellation

Basic Triangle Tessellation

Code Name: BasicTriangleTessellation

Description

In this example, a simple triangle is drawn on the screen in wireframe mode, and tessellation shaders are applied to this triangle, dividing its interior into smaller triangles. The inner tessellation level value is set by the user.

Output

Controls

Input	Action
Esc	Close the window
0	Inner Tessellation Level = 0.0
1	Inner Tessellation Level = 3.0
2	Inner Tessellation Level = 5.0
3	Inner Tessellation Level = 8.0
4	Inner Tessellation Level = 10.0
5	Inner Tessellation Level = 12.0
6	Inner Tessellation Level = 15.0
7	Inner Tessellation Level = 17.0
8	Inner Tessellation Level = 20.0

Application Parameters

Settings

Parameter / Key	Type	Usage in Code	Description	Default Value
AppSettings.ClearColor	VkClearColorValue	AppSettings::ClearColor	Background color of the screen
AppSettings.LineWidth	float	AppSettings::LineWidth	Width of the wireframe lines

Learning Objectives

• Learning how to use tessellation shaders in Vulkan
• Understanding how tessellation control variables are working
• Implementing basic tessellation evaluation shader
• Understanding how triangle tessellation is working

Shader Status

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