some prb examples

1 files changed, 17 insertions, 0 deletions

diff --git a/pbr/2.1.1.ibl_irradiance_conversion/background.frag b/pbr/2.1.1.ibl_irradiance_conversion/background.frag
new file mode 100644
index 0000000..e3891eb
--- /dev/null
+++ b/pbr/2.1.1.ibl_irradiance_conversion/background.frag
@@ -0,0 +1,17 @@
+#version 330 core
+
+in vert_t {
+	vec3 position;
+} vert;
+
+out vec4 frag_color;
+
+uniform samplerCube cubemap;
+
+void main(void)
+{
+	vec3 color = texture(cubemap, vert.position).rgb;
+	color /= color + vec3(1.0);
+	color = pow(color, vec3(1.0 / 2.2));
+	frag_color = vec4(color, 1.0);
+}