1 files changed, 0 insertions, 114 deletions
diff --git a/pbr/2.1.2.ibl_irradiance/pbr.frag b/pbr/2.1.2.ibl_irradiance/pbr.frag
deleted file mode 100644
index 88cf01d..0000000
--- a/pbr/2.1.2.ibl_irradiance/pbr.frag
+++ /dev/null
@@ -1,114 +0,0 @@
-#version 330 core
-
-in vert_t {
-	vec3 position;
-	vec3 normal;
-} vert;
-
-out vec4 frag_color;
-
-uniform vec3 camera;
-
-uniform vec3 color;
-uniform float metallic;
-uniform float roughness;
-uniform float ao;
-
-uniform samplerCube irradiance_map;
-
-struct light_t {
-	vec3 position;
-	vec3 color;
-};
-
-const int light_count = 4;
-uniform light_t lights[light_count];
-
-const float PI = 3.14159265358; 
-
-vec3 fresnel_shlick(float costheta, vec3 f0)
-{
-	return f0 + (1.0 - f0) * pow(1.0 - costheta, 5.0);
-}
-
-float distribution_ggx(vec3 n, vec3 h, float roughness)
-{
-	float a = roughness * roughness;
-	float a2 = a * a;
-	float ndoth = max(dot(n, h), 0.0);
-	float ndoth2 = ndoth * ndoth;
-
-	float num = a2;
-	float denom = (ndoth2 * (a2 - 1.0) + 1.0);
-	denom = PI * denom * denom;
-
-	return num / denom;
-}
-
-float geometry_shlick_ggx(float ndotv, float roughness)
-{
-	float r = roughness + 1.0;
-	float k = r * r / 8.0;
-
-	float num = ndotv;
-	float denom = ndotv * (1.0 - k) + k;
-	
-	return num / denom;
-}
-
-float geometry_smith(vec3 n, vec3 v, vec3 l, float roughness)
-{
-	float ndotv = max(dot(n, v), 0.0);
-	float ndotl = max(dot(n, l), 0.0);
-	float ggx2 = geometry_shlick_ggx(ndotv, roughness);
-	float ggx1 = geometry_shlick_ggx(ndotl, roughness);
-
-	return ggx1 * ggx2;
-}
-
-void main(void)
-{
-	vec3 n = vert.normal;
-	vec3 v = normalize(camera - vert.position);
-
-	vec3 f0 = vec3(0.04);
-	f0 = mix(f0, color, metallic);
-
-	vec3 lo = vec3(0.0);
-	for (int i = 0; i < light_count; i++) {
-		vec3 l = normalize(lights[i].position - vert.position);
-		vec3 h = normalize(v + l);
-		float ndotv = max(dot(n, v), 0.0);
-		float ndotl = max(dot(n, l), 0.0);
-
-		float distance = length(lights[i].position - vert.position);
-		float attenuation = 1.0 / (distance * distance);
-
-		vec3 radiance = lights[i].color * attenuation;
-
-		vec3 f = fresnel_shlick(max(dot(h, v), 0.0), f0);
-
-		float ndf = distribution_ggx(n, h, roughness);
-		float g = geometry_smith(n, v, l, roughness);
-
-		vec3 numerator = ndf * g * f;
-		float denominator = 4.0 * ndotv * ndotl;
-		vec3 specular = numerator / max(denominator, 0.001);
-
-		vec3 ks = f;
-		vec3 kd = vec3(1.0) - ks;
-
-		kd *= 1.0 - metallic;
-
-		lo += (kd * color / PI + specular) * radiance * ndotl;
-	}
-	
-	vec3 ks = fresnel_shlick(max(dot(n, v), 0.0), f0);
-	vec3 kd = 1.0 - ks;
-	kd *= 1.0 - metallic;
-	vec3 irradiance = texture(irradiance_map, n).rgb;
-	vec3 diffuse = irradiance * color;
-	vec3 ambient = kd * diffuse * ao;
-
-	frag_color = vec4(ambient + lo, 1.0);
-}