Spotlight

Spotlight

Code Name: Spotlight

Description

In this example, objects of different colors are drawn on the scene, and lighting is provided by two spotlights with hard-cutoff.

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
AppSettings.LightDirection	glm:vec3	AppSettings::LightDirection	Direction vector of the light
AppSettings.LightColor	glm:vec3	AppSettings::LightColor	Color of the light (RGB)
AppSettings.AmbientStrength	float	AppSettings::AmbientStrength	Ambient strength of the material
AppSettings.SpecularStrength	float	AppSettings::SpecularStrength	Specular strength factor
AppSettings.Shininess	float	AppSettings::Shininess	Shininess exponent
AppSettings.CutoffAngle	float	AppSettings::CutoffAngle	Cutoff angle of the spotlight

Learning Objectives

• Implementing spotlight behavior in the shaders
• Integrating blinn-phong shading model into the spotlights
• Implementing hard-cutoff (hard edges) spotlight behavior with only one cutoff angle
• Implementing multiple lights behavior with the same type

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