1 files changed, 0 insertions, 33 deletions
diff --git a/pbr/2.1.2.ibl_irradiance/convolution.frag b/pbr/2.1.2.ibl_irradiance/convolution.frag
deleted file mode 100644
index 69ce8af..0000000
--- a/pbr/2.1.2.ibl_irradiance/convolution.frag
+++ /dev/null
@@ -1,33 +0,0 @@
-#version 330 core
-
-in vert_t {
-	vec3 position;
-} vert;
-
-out vec4 frag_color;
-
-uniform samplerCube cubemap;
-
-const float PI = 3.14159265359;
-
-void main(void)
-{
-	vec3 normal = normalize(vert.position);
-	vec3 up = vec3(0.0, 1.0, 0.0);
-	vec3 right = cross(up, normal);
-	up = cross(normal, right);
-
-	vec3 irradiance = vec3(0.0);
-	float delta = 0.025;
-	int nsamples = 0;
-	for (float phi = 0.0; phi < 2.0 * PI; phi += delta) {
-		for (float theta = 0.0; theta < 0.5 * PI; theta += delta) {
-			vec3 tangent = vec3(sin(theta) * cos(phi), sin(theta) * sin(phi), cos(theta));
-			vec3 v = tangent.x * right + tangent.y * up + tangent.z * normal;
-			irradiance += texture(cubemap, v).rgb * cos(theta) * sin(theta);
-			nsamples++;
-		}
-	}
-	irradiance *= PI / nsamples;
-	frag_color = vec4(irradiance, 1.0);
-}