Specular Lighting Shader

specular.frag

#version 450

layout(location = 0) in vec3 InNormal;
layout(location = 1) in vec3 InFragPos;
layout(location = 0) out vec4 FragColor;

layout(binding = 0, set = 3) uniform UBO
{
    vec3 ViewPos;
    float Strength;
    vec3 LightColor;
	float Shininess;
} ubo;

void main()
{
	vec3 norm = normalize(InNormal);
	vec3 viewDir = normalize(ubo.ViewPos - InFragPos);
    vec3 lightDir = normalize(ubo.LightPos - InFragPos);
	vec3 reflectDir = reflect(-lightDir, norm);
	float spec = pow(max(dot(viewDir, reflectDir), 0.0), ubo.Shininess);
	vec3 specular = ubo.Strength * spec * ubo.LightColor;
	
    FragColor = vec4(specular, 1.0);
}