procedural-3d-engine/shaders/glsl/texturecubemap/reflect.frag
2023-05-09 21:03:02 +02:00

39 lines
No EOL
990 B
GLSL

#version 450
layout (binding = 1) uniform samplerCube samplerColor;
layout (binding = 0) uniform UBO
{
mat4 projection;
mat4 model;
mat4 invModel;
float lodBias;
} ubo;
layout (location = 0) in vec3 inPos;
layout (location = 1) in vec3 inNormal;
layout (location = 2) in vec3 inViewVec;
layout (location = 3) in vec3 inLightVec;
layout (location = 0) out vec4 outFragColor;
void main()
{
vec3 cI = normalize (inPos);
vec3 cR = reflect (cI, normalize(inNormal));
cR = vec3(ubo.invModel * vec4(cR, 0.0));
// Convert cubemap coordinates into Vulkan coordinate space
cR.xy *= -1.0;
vec4 color = texture(samplerColor, cR, ubo.lodBias);
vec3 N = normalize(inNormal);
vec3 L = normalize(inLightVec);
vec3 V = normalize(inViewVec);
vec3 R = reflect(-L, N);
vec3 ambient = vec3(0.5) * color.rgb;
vec3 diffuse = max(dot(N, L), 0.0) * vec3(1.0);
vec3 specular = pow(max(dot(R, V), 0.0), 16.0) * vec3(0.5);
outFragColor = vec4(ambient + diffuse * color.rgb + specular, 1.0);
}